None BERVO 2026-10-16 description license title A property describing the attribute a variable measures or describes. Similar to PATO terms. In general, the attribute is the name for what is measured. For example, if the variable is "concentration of nitrate in water" then the attribute will be "concentration". Definition source - Manual (JHC, Sep 25 2025) Attribute NA A property describing the place, situation, activity, or phenomenon the measurement is related to. Definition source - Manual (JHC, Sep 25 2025) Context NA A property describing a qualifier for a variable. For example, if the variable is "total mass", then the qualifier will be "total". It may also describe the conditions under which the attribute is measured. Definition source - Manual (JHC, Sep 25 2025) Qualifier NA A property describing a relationship between a variable and one or more units of measurement. Definition source - Manual (JHC, Sep 25 2025) has unit NA A property describing the type of value the measurement has. Definition source - Manual (JHC, Sep 25 2025) has value type NA A property describing the material or substance a variable is measured within. In general, read as ATTRIBUTE in (this value). For example, if the variable is "concentration of nitrate in water" then the measured_in will be "water". Definition source - Manual (JHC, Sep 25 2025) measured in NA A property describing the material or substance a variable is measuring. In general, read as ATTRIBUTE of (this value). For example, if the variable is "concentration of nitrate in water" then the measurement_of will be "nitrate". Definition source - Manual (JHC, Sep 25 2025) measurement of NA A property denoting that an instance of this variable may include one or more chemicals. Definition source - Manual (JHC, Sep 25 2025) Should be restricted to a list of chemical IDs involves chemicals NA A property denoting that an instance of this variable may include one or more biological taxa. Definition source - Manual (JHC, Sep 25 2025) Should be restricted to a list of taxon IDs involves taxa NA An observed or calculated property of a system. In BERVO, variables generally correspond to anything subject to change in an experiment or direct observation of an environment or other natural phenomenon. Definition Curated Definition source - Manual (JHC, Sep 25 2025) Group Curated root class of ontology Variable NA EcoSIM output: The balance between incoming solar shortwave radiation and atmospheric longwave radiation versus reflected shortwave radiation and outgoing longwave radiation from terrestrial surfaces and vegetation. This quantity is fundamental for calculating the energy budget of ecosystems and drives evapotranspiration, photosynthesis, and soil temperature dynamics in Earth system models. Eco_NetRad_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Ecosystem net radiation MJ.h-1/{grid} EcoSIM output: The energy transfer associated with water vapor movement from terrestrial surfaces to the atmosphere through evapotranspiration processes. This flux represents a major component of the surface energy balance and is critical for understanding water cycle dynamics and climate feedbacks in Earth system models. Eco_Heat_Latent_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Ecosystem latent heat flux MJ.h-1/{grid} EcoSIM output: The direct transfer of thermal energy between the atmosphere and land surface entities including ground surface and vegetation through conduction and convection. This flux component controls air temperature dynamics and atmospheric boundary layer development in environmental modeling studies. Eco_Heat_Sens_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Ecosystem sensible heat flux MJ.h-1/{grid} EcoSIM output: The residual energy flux absorbed by the ground calculated by subtracting latent and sensible heat fluxes from net radiation. This flux drives soil temperature changes and affects subsurface thermal dynamics, root zone processes, and permafrost behavior in Earth system models. Eco_Heat_GrndSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Ecosystem storage heat flux MJ.h-1/{grid} EcoSIM output: The total amount of carbon dioxide fixed by photosynthesis from the beginning of the year to the current day. This cumulative measure represents the total carbon uptake capacity of vegetation and is essential for quantifying ecosystem carbon sequestration and productivity in global carbon cycle studies. Eco_GPP_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Cumulative ecosystem gross primary productivity g{C}/{grid} EcoSIM output: The total carbon dioxide released by plant metabolic processes including maintenance and growth respiration from the beginning of the year to the current day. This cumulative flux represents the carbon cost of plant metabolism and is crucial for calculating net primary productivity in ecosystem carbon budget assessments. Eco_AutoR_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Cumulative ecosystem autotrophic respiration g{C}/{grid} EcoSIM output: The total net carbon accumulation in plant biomass calculated as the difference between gross primary productivity and autotrophic respiration from the beginning of the year to the current day. This measure quantifies the carbon available for plant growth, reproduction, and ecosystem food webs in terrestrial carbon cycle modeling. Eco_NPP_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Cumulative ecosystem net primary productivity g{C}/{grid} EcoSIM output: The total carbon dioxide and methane released through microbial and abiotic decomposition of soil organic matter from the beginning of the year to the current day. This cumulative flux represents soil carbon losses and is fundamental for understanding soil carbon dynamics and greenhouse gas emissions in Earth system models. Eco_HR_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Cumulative ecosystem heterotrophic respiration g{C}/{grid} EcoSIM output: The instantaneous rate of carbon dioxide release from soil through microbial decomposition of organic matter. This flux represents aerobic decomposition processes and is a key component of soil carbon cycling and atmospheric carbon dioxide emissions in biogeochemical models. ECO_HR_CO2_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Heterotrophic respiration as carbon dioxide g{C}.h-1/{grid} EcoSIM output: The instantaneous rate of carbon dioxide release from microbial decomposition of organic matter resolved by soil depth layers. This depth-resolved measurement allows for detailed analysis of soil carbon dynamics at different depths and improved representation of soil processes in Earth system models. ECO_HR_CO2_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Vertically resolved heterotrophic respiration as carbon dioxide g{C}.h-1/{grid} EcoSIM output: The instantaneous rate of methane release from anaerobic microbial decomposition of organic matter resolved by soil depth layers. This flux represents anaerobic decomposition processes in waterlogged or oxygen-limited soils and is critical for quantifying methane emissions from wetlands and other anaerobic environments. ECO_HR_CH4_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Heterotrophic respiration as methane g{C}/{grid} EcoSIM output: The removal of biological products including timber, fodder, firewood, biofuels, and non-timber forest products from terrestrial ecosystems through human activities. This anthropogenic flux significantly impacts vegetation structure, biodiversity, and biogeochemical cycles and represents an important ecosystem service in Earth system modeling. EcoHavstElmnt_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Ecosystem harvest g{C}/{grid} EcoSIM output: The net balance between ammonium (NH4+) release from organic matter decomposition and ammonium uptake for microbial biomass synthesis, cumulated from the beginning of the year. This flux represents the net availability of nitrogen for plant uptake and is fundamental for understanding nitrogen cycling and limitation in terrestrial ecosystems. NetNH4Mineralize_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Total ammonium net mineraln (-ve) or immobiln (+ve) g{N}/{grid} EcoSIM output: The net balance between phosphate (PO43-) release from organic matter decomposition and phosphate uptake for microbial biomass synthesis, cumulated from the beginning of the year. This flux determines phosphorus availability for plant growth and is essential for modeling phosphorus cycling and nutrient limitation in ecosystems. NetPO4Mineralize_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Total phosphate net mineraln (-ve) or immobiln (+ve) g{P}/{grid} EcoSIM output: The net carbon exchange within plant canopies calculated as the difference between carbon dioxide fixation by photosynthesis and carbon dioxide release from autotrophic respiration and disturbances. This flux quantifies the net carbon uptake or release by vegetation and is crucial for assessing ecosystem carbon balance and climate change impacts. Canopy_NEE_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Total net carbon dioxide fixation g{C}.h-1/{grid} EcoSIM output: The flux of chemical elements including carbon, nitrogen, and phosphorus transferred from living plant tissues to the soil surface through leaf, branch, and reproductive structure senescence. This process represents a major pathway for nutrient cycling and organic matter input to soils in terrestrial ecosystem models. LitrFallStrutElms_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Total litterfall chemical elements g.h-1/{grid} EcoSIM output: The total release of carbon dioxide and methane from terrestrial ecosystems through combined belowground and aboveground microbial metabolism and plant autotrophic respiration. This comprehensive flux includes soil surface carbon dioxide release through diffusion, ebullition, plant-mediated transport, and wet deposition, representing the total respiratory carbon loss from ecosystems. ECO_ER_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Ecosystem respiration g{C}.h-1/{grid} EcoSIM output: The accumulated net carbon balance of an entire ecosystem calculated as the difference between carbon dioxide fixation through photosynthesis and carbon losses through plant and microbial respiration plus any disturbances. This comprehensive measure represents the long-term carbon storage capacity of ecosystems and is critical for assessing ecosystem carbon sequestration potential and responses to environmental changes in Earth system models. Eco_NBP_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Cumulative net biome production g{C}/{grid} EcoSIM output: The instantaneous inorganic phosphate (HPO4) demand by plant roots, mycorrhizae, and microbial populations from non-fertilizer-banded soil zones, resolved by soil depth. This variable quantifies phosphorus uptake requirements from naturally distributed soil phosphorus pools and is essential for modeling phosphorus limitation and competition among different biological components in terrestrial ecosystems. REcoH1PO4DmndSoil_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Current inorganic phosphate demand in non-band by all microbial,root,myco populations g{P}.h-1/{grid} EcoSIM output: The inorganic phosphate (HPO4) demand by plant roots, mycorrhizae, and microbial populations from the previous computational time step in non-fertilizer-banded soil zones, resolved by soil depth. This variable enables temporal tracking of phosphorus demand dynamics and is used to calculate changes in nutrient uptake patterns and ecosystem phosphorus cycling rates. RH1PO4EcoDmndSoilPrev_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Previous time step inorganic phosphate demand in non-band by all microbial,root,myco populations g{P}.h-1/{grid} EcoSIM output: This refers to the vertically resolved inorganic P demand to support plant roots and microbial uptake from soil bands. Soil bands are defined according to fertilizer application in the form of sidedressing. REcoH1PO4DmndBand_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Current inorganic phosphate demand in band by all microbial,root,myco populations g{P}.h-1/{grid} EcoSIM output: This refers to the previous time step vertically resolved inorganic P demand to support plant roots and microbial uptake from soil bands. Soil bands are defined according to fertilizer application in the form of sidedressing. RH1PO4EcoDmndBandPrev_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcosimBGCFluxType.txt Previous time step inorganic phosphate demand in band by all microbial,root,myco populations g{P}.h-1/{grid} EcoSIM input parameter: The kinetic parameter describing the rate at which urease inhibitors lose their capacity to suppress urea hydrolysis reactions in soil. This constant is crucial for modeling the temporal dynamics of nitrogen release from urea fertilizers and understanding how inhibitor effectiveness changes over time in agricultural and environmental systems. RUreaInhibtorConst Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Rate constants for decline in urea hydrolysis inhibition h-1 The equilibrium constant for the autoionization of water into hydrogen and hydroxide ions, representing the fundamental acid-base chemistry of aqueous systems. This constant governs hydrogen ion activity and solution pH in terrestrial and aquatic environments, making it essential for modeling chemical weathering, nutrient availability, and biogeochemical processes in Earth system models. DPH2O Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt The equation is important context; is that "context" or "measurement_of" Equilibrium constant for H2O=H(+)+OH(-) mol2.m-6 The equilibrium constant for the dissolution of solid aluminum trihydroxide into aluminum and hydroxide ions in aqueous solution. This reaction controls aluminum solubility and bioavailability in soils and is critical for modeling aluminum toxicity, soil pH buffering, and chemical weathering processes in terrestrial ecosystems. SPALO Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlOH3(s)=Al(3+)+3OH(-) mol3.m-9 The equilibrium constant for the dissolution of iron(III) hydroxide solid into ferric iron and hydroxide ions in aqueous solution. This reaction governs iron availability for biological processes and controls iron-phosphate interactions that affect nutrient cycling and plant growth in terrestrial and aquatic environments. SPFEO Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FeOH3(s)=Fe(3+)+3OH(-) mol3.m-9 The equilibrium constant for the dissolution of calcium carbonate solid into calcium and carbonate ions in aqueous solution. This reaction is fundamental to carbonate weathering, soil pH regulation, and carbon cycling in terrestrial ecosystems, and controls calcium availability for plant nutrition and soil structure development. SPCAC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for CaCO3(s)=Ca(2+)+CO3(2-) mol.m-3 The equilibrium constant for the dissolution of calcium sulfate solid into calcium and sulfate ions in aqueous solution. This reaction controls gypsum solubility in soils and affects soil salinity, calcium availability, and sulfur cycling in arid and semi-arid terrestrial ecosystems. SPCAS Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for CaSO4(s)=Ca(2+)+SO4(2-) mol.m-3 The equilibrium constant for the dissolution of aluminum phosphate solid into aluminum and phosphate ions in aqueous solution. This reaction controls phosphorus availability in acidic soils where aluminum-phosphate minerals are common and is essential for modeling phosphorus limitation and plant nutrition in terrestrial ecosystems. SPALP Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)=Al(3+)+PO4(3-) mol.m-3 The equilibrium constant for the dissolution of iron phosphate solid into ferric iron and phosphate ions in aqueous solution. This reaction governs phosphorus sequestration by iron minerals in soils and sediments and is critical for understanding phosphorus cycling and availability in both terrestrial and aquatic ecosystems. SPFEP Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)=Fe(3+)+PO4(3-) mol.m-3 The equilibrium constant for the dissolution of calcium dihydrogen phosphate solid into calcium and dihydrogen phosphate ions in aqueous solution. This reaction controls the solubility of highly soluble phosphate fertilizers and governs initial phosphorus release rates following fertilizer application in agricultural systems. SPCAM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Ca(H2PO4)2(s)=Ca(2+)+2H2PO4(-) mol3.m-9 The equilibrium constant for the dissolution of calcium hydrogen phosphate solid into calcium and hydrogen phosphate ions in aqueous solution. This reaction controls the solubility of moderately soluble phosphate minerals in soils and affects phosphorus availability for plant uptake and microbial processes in terrestrial ecosystems. SPCAD Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for CaHPO4(s)=Ca(2+)+HPO4(2-) mol3.m-9 The equilibrium constant for the dissolution of hydroxyapatite mineral into calcium, phosphate, and hydroxide ions in aqueous solution. This reaction governs the long-term stability of calcium phosphate minerals in soils and bones, controlling phosphorus cycling and calcium availability in both terrestrial ecosystems and biological systems. SPCAH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for hydroxyapatite,Ca5(PO4)3OH(s)=5Ca(2+)+3PO4(3-)+OH(-) mol8.m-24 The equilibrium constant for the deprotonation of positively charged surface hydroxyl groups on mineral and organic surfaces to neutral hydroxyl groups. This reaction controls the pH-dependent surface charge of soil particles and affects ion adsorption, nutrient availability, and contaminant transport in terrestrial environments. SXOH2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for X-OH2(+)=X-OH+H(+) mol.m-3 The equilibrium constant for the deprotonation of neutral surface hydroxyl groups to negatively charged surface groups on mineral and organic surfaces. This reaction determines the development of negative surface charge at higher pH values and controls cation exchange capacity and nutrient retention in soils. SXOH1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for X-OH1=X-O(-)+H(+) mol.m-3 The equilibrium constant for the desorption of dihydrogen phosphate from positively charged surface sites in the presence of water to form phosphate ions in solution. This reaction controls phosphorus availability in soils by governing the release of phosphate from mineral and organic surfaces and is essential for modeling phosphorus cycling and plant nutrient uptake in terrestrial ecosystems. SXH2P Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for X-H2PO4+H2O=X-OH2(+)+H2PO4(-) mol.m-3 The equilibrium constant for the desorption of hydrogen phosphate from negatively charged surface sites to form phosphate ions in solution. This reaction governs phosphorus mobility and bioavailability in soils and sediments and is critical for understanding phosphorus release from soil surfaces and its role in plant nutrition and eutrophication processes. SXH1P Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for X-H1PO4(-)=X-OH+HPO4(2-) mol.m-3 The equilibrium constant for the hydration of carbon dioxide to form bicarbonate and hydrogen ions in aqueous solution. This reaction is fundamental to the carbonic acid system that controls pH buffering in soils and water bodies and governs carbon dioxide solubility and transport in terrestrial and aquatic environments. DPCO2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for CO2 + H2O = HCO3(-) + H(+) mol.m-3 The equilibrium constant for the deprotonation of bicarbonate ions to form carbonate ions and hydrogen ions in aqueous solution. This reaction controls the distribution of inorganic carbon species with pH and is essential for modeling carbonate chemistry, pH buffering, and carbon cycling in alkaline soils and water systems. DPHCO Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for HCO3(-) = CO3(2-) + H(+) mol.m-3 The equilibrium constant for the deprotonation of ammonium ions to form ammonia and hydrogen ions in aqueous solution. This reaction controls the pH-dependent partitioning between ammonium and ammonia forms and is critical for modeling ammonia volatilization, nitrogen availability, and nitrogen losses from terrestrial ecosystems. DPN4 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for NH4(+) = NH3 + H(+) mol.m-3 The equilibrium constant for the dissociation of aluminum monohydroxide complex ions to form free aluminum and hydroxide ions in aqueous solution. This reaction controls aluminum speciation and toxicity in acidic soils and waters and is fundamental for modeling aluminum mobility, plant aluminum stress, and chemical weathering processes in terrestrial environments. DPAL1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlOH(2+)=Al(3+)+OH(-) mol.m-3 The equilibrium constant for the stepwise dissociation of aluminum dihydroxide complex ions to form aluminum monohydroxide complexes and hydroxide ions. This reaction is part of the aluminum hydrolysis series that governs aluminum speciation in soils and waters and affects aluminum bioavailability and phytotoxicity in acidic terrestrial and aquatic systems. DPAL2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Al(OH)2(+)=AlOH(2+)+OH(-) mol.m-3 The equilibrium constant for the dissociation of dissolved aluminum trihydroxide to form aluminum dihydroxide complex ions and hydroxide ions. This reaction controls the formation of intermediate aluminum species during chemical weathering and affects aluminum solubility and transport in soil solutions and surface waters. DPAL3 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Al(OH)3(aq)=Al(OH)2(+)+OH(-) mol.m-3 The equilibrium constant for the dissociation of aluminum tetrahydroxide complex ions to form aluminum trihydroxide species and hydroxide ions. This reaction occurs at higher pH values and controls aluminum speciation in alkaline soils and waters where aluminum forms anionic complexes that affect aluminum mobility and environmental fate. DPAL4 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Al(OH)4(-)=Al(OH)3(aq)+OH(-) mol.m-3 The equilibrium constant for the dissociation of aluminum sulfate complex ions to form free aluminum and sulfate ions in aqueous solution. This reaction controls aluminum and sulfate availability in acidic soils affected by acid deposition and is important for modeling aluminum toxicity and sulfur cycling in forest and agricultural ecosystems. DPALS Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Al(SO4)(+)=Al(3+)+SO4(2-) mol.m-3 The equilibrium constant for the dissociation of iron(III) monohydroxide complex ions to form free ferric iron and hydroxide ions in aqueous solution. This reaction controls iron speciation and solubility in oxidized environments and affects iron bioavailability, phosphorus sorption, and redox processes in terrestrial and aquatic ecosystems. DPFE1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Fe(OH)(2+)=Fe(3+)+OH(-) mol.m-3 The equilibrium constant for the stepwise dissociation of iron(III) dihydroxide complex ions to form monohydroxide complexes and hydroxide ions. This reaction is part of the iron hydrolysis series that governs iron speciation in soils and waters and controls iron precipitation, phosphorus binding, and biogeochemical processes in environmental systems. DPFE2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Fe(OH)2(+)=FeOH(2+)+OH(-) mol.m-3 The equilibrium constant for the dissociation of dissolved iron(III) trihydroxide to form dihydroxide complex ions and hydroxide ions. This reaction controls the formation of intermediate iron species during iron oxide precipitation and affects iron transport, phosphorus adsorption, and trace metal interactions in soil and water systems. DPFE3 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Fe(OH)3(aq)=Fe(OH)2(+)+OH(-) mol.m-3 The equilibrium constant for the dissociation of iron(III) tetrahydroxide complex ions to form trihydroxide species and hydroxide ions. This reaction occurs at high pH values and controls iron speciation in alkaline soils and waters where iron forms anionic complexes that affect iron solubility and interactions with other elements. DPFE4 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Fe(OH)4(-)=Fe(OH)3(aq)+OH(-) mol.m-3 The equilibrium constant for the dissociation of iron(III) sulfate complex ions to form free ferric iron and sulfate ions in aqueous solution. This reaction controls iron and sulfate availability in acidic, sulfate-rich environments and is important for modeling iron cycling and sulfur biogeochemistry in mine-affected and acid-impacted ecosystems. DPFES Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Fe(SO4)(+)=Fe(3+)+SO4(2-) mol.m-3 The equilibrium constant for the dissociation of calcium hydroxide complex ions to form free calcium and hydroxide ions in aqueous solution. This reaction controls calcium speciation in alkaline soils and waters and affects calcium availability for plant nutrition and soil pH buffering in calcareous and lime-amended terrestrial systems. DPCAO Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Ca(OH)(-)=Ca(2+)+OH(-) mol.m-3 The equilibrium constant for the dissociation of dissolved calcium carbonate complexes to form free calcium and carbonate ions in aqueous solution. This reaction controls calcium and carbonate availability in calcareous systems and is fundamental for modeling carbonate chemistry, pH buffering, and calcium cycling in limestone-derived soils and alkaline waters. DPCAC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for CaCO3(aq)=Ca(2+)+CO3(2-) mol.m-3 The equilibrium constant for the dissociation of calcium bicarbonate complex ions to form free calcium and bicarbonate ions in aqueous solution. This reaction controls calcium and inorganic carbon speciation in carbonate-buffered systems and is essential for modeling calcium availability and carbon cycling in calcareous soils and alkaline waters. DPCAH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for CaHCO3(+)=Ca(2+)+HCO3(-) mol.m-3 The equilibrium constant for the dissociation of dissolved calcium sulfate complexes to form free calcium and sulfate ions in aqueous solution. This reaction controls calcium and sulfate availability in gypsum-containing soils and affects soil salinity, calcium nutrition, and sulfur cycling in arid and semi-arid terrestrial ecosystems. DPCAS Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for CaSO4=Ca(2+)+SO4(2-) mol.m-3 The equilibrium constant for the dissociation of magnesium hydroxide complex ions to form free magnesium and hydroxide ions in aqueous solution. This reaction controls magnesium speciation in alkaline conditions and affects magnesium availability for plant nutrition and enzymatic processes in terrestrial and aquatic ecosystems. DPMGO Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for MgOH(+)=Mg(2+)+OH(-) mol.m-3 The equilibrium constant for the dissociation of dissolved magnesium carbonate complexes to form free magnesium and carbonate ions in aqueous solution. This reaction controls magnesium and carbonate availability in dolomitic and magnesium-rich calcareous systems and affects magnesium cycling and pH buffering in alkaline soils and waters. DPMGC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for MgCO3=Mg(2+)+CO3(2-) mol.m-3 The equilibrium constant for the dissociation of magnesium bicarbonate complex ions to form free magnesium and bicarbonate ions in aqueous solution. This reaction controls magnesium and inorganic carbon speciation in carbonate-buffered waters and is important for modeling magnesium cycling and carbon dioxide solubility in natural water systems and alkaline soils. DPMGH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for MgHCO3(-)=Mg(2+)+HCO3(-) mol.m-3 The equilibrium constant for the dissociation of dissolved magnesium sulfate complexes to form free magnesium and sulfate ions in aqueous solution. This reaction controls magnesium and sulfate availability in sulfate-rich environments and affects magnesium nutrition, soil salinity, and sulfur cycling in terrestrial and aquatic ecosystems. DPMGS Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for MgSO4=Mg(2+)+SO4(2-) mol.m-3 The equilibrium constant for the dissociation of sodium carbonate complex ions to form free sodium and carbonate ions in aqueous solution. This reaction controls sodium and carbonate availability in alkaline, sodium-rich environments and affects soil salinity, pH buffering, and sodium toxicity in salt-affected terrestrial ecosystems. DPNAC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for NaCO3(-)=Na(+)+CO3(2-) mol.m-3 The equilibrium constant for the dissociation of sodium sulfate complex ions to form free sodium and sulfate ions in aqueous solution. This reaction controls ion speciation in saline environments and affects soil salinity, sodium adsorption, and salt accumulation in arid and semi-arid terrestrial ecosystems. DPNAS Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for NaSO4(-)=Na(+)+SO4(2-) mol.m-3 The equilibrium constant for the dissociation of potassium sulfate complex ions to form free potassium and sulfate ions in aqueous solution. This reaction controls potassium and sulfate availability in agricultural soils and affects potassium nutrition, soil fertility, and sulfur cycling in terrestrial ecosystems. DPKAS Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for KSO4(-)=K(+)+SO4(2-) mol.m-3 The equilibrium constant for the third dissociation step of phosphoric acid, where hydrogen phosphate ions lose a proton to form phosphate ions and hydrogen ions. This reaction controls phosphate speciation at high pH values and is fundamental for modeling phosphorus availability and pH buffering in alkaline soils and waters where phosphate is the dominant phosphorus species. DPH1P Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for HPO4(2-)=H(+)+PO4(3-) mol.m-3 The equilibrium constant for the second dissociation step of phosphoric acid, where dihydrogen phosphate ions lose a proton to form hydrogen phosphate ions and hydrogen ions. This reaction controls phosphate speciation in the neutral to slightly alkaline pH range and is critical for modeling phosphorus bioavailability and nutrient cycling in most terrestrial and aquatic ecosystems. DPH2P Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for H2PO4(-)=H(+)+HPO4(2-) mol.m-3 The equilibrium constant for the first dissociation step of phosphoric acid, where phosphoric acid molecules lose a proton to form dihydrogen phosphate ions and hydrogen ions. This reaction controls phosphate speciation in acidic conditions and is essential for modeling phosphorus chemistry and availability in acidic soils and waters where this reaction governs initial phosphorus release. DPH3P Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for H3PO4=H(+)+H2PO4(-) mol.m-3 The equilibrium constant for the dissociation of iron(III) hydrogen phosphate complex ions to form free ferric iron and hydrogen phosphate ions in aqueous solution. This reaction controls the interaction between iron and phosphorus in acidic to neutral conditions and is important for modeling phosphorus sequestration by iron minerals and phosphorus availability in iron-rich soils and sediments. DPF1P Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FeHPO4(+)=Fe(3+)+HPO4(2-) mol.m-3 The equilibrium constant for the dissociation of iron(III) dihydrogen phosphate complex ions to form free ferric iron and dihydrogen phosphate ions in aqueous solution. This reaction controls iron-phosphorus interactions in acidic conditions and affects phosphorus binding to iron minerals, phosphorus bioavailability, and iron-phosphate mineral formation in terrestrial and aquatic ecosystems. DPF2P Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FeH2PO4(2+)=Fe(3+)+H2PO4(-) mol.m-3 The equilibrium constant for the dissociation of calcium phosphate complex ions to form free calcium and phosphate ions in aqueous solution. This reaction controls calcium-phosphorus interactions in alkaline conditions and is fundamental for modeling calcium phosphate mineral formation, phosphorus precipitation, and nutrient availability in calcareous soils and alkaline waters. DPC0P Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for CaPO4(-)=Ca(2+)+PO4(3-) mol.m-3 The equilibrium constant for the dissociation of dissolved calcium hydrogen phosphate complexes to form free calcium and hydrogen phosphate ions in aqueous solution. This reaction controls calcium-phosphorus interactions in neutral to slightly alkaline conditions and is important for modeling phosphorus availability and calcium phosphate mineral stability in terrestrial ecosystems. DPC1P Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for CaHPO4=Ca(2+)+HPO4(2-) mol.m-3 The equilibrium constant for the dissociation of calcium dihydrogen phosphate complex ions to form free calcium and dihydrogen phosphate ions in aqueous solution. This reaction controls calcium-phosphorus interactions in acidic to neutral conditions and is essential for modeling phosphorus release from calcium-based fertilizers and phosphorus availability in agricultural soils. DPC2P Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for CaH2PO4(+)=Ca(2+)+H2PO4(-) mol.m-3 The equilibrium constant for the dissociation of dissolved magnesium hydrogen phosphate complexes to form free magnesium and hydrogen phosphate ions in aqueous solution. This reaction controls magnesium-phosphorus interactions and affects both magnesium and phosphorus availability for plant nutrition and microbial processes in terrestrial and aquatic ecosystems. DPM1P Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for MgHPO4=Mg(2+)+HPO4(2-) mol.m-3 The equilibrium constant for the deprotonation of carboxyl groups on organic surfaces to form carboxylate groups and hydrogen ions in aqueous solution. This reaction controls the pH-dependent surface charge of organic matter and affects cation exchange capacity, metal binding, and organic matter interactions in soil and aquatic environments. DPCOH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for X-COOH=X-COO(-)+H(+) mol.m-3 The equilibrium constant for the protonation-induced release of aluminum dihydroxide complexes from carboxylate binding sites on organic surfaces. This reaction controls aluminum binding to organic matter and affects aluminum detoxification, organic matter stability, and aluminum mobility in acidic soils and waters rich in organic compounds. DPALO Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for X-COO-Al(OH)2+H(+)=Al(OH)2(+)+X-COOH mol.m-3 The equilibrium constant for the protonation-induced release of iron(III) dihydroxide complexes from carboxylate binding sites on organic surfaces. This reaction controls iron binding to organic matter and affects iron bioavailability, organic matter stability, and iron transport in soils and waters with high organic carbon content. DPFEO Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for X-COO-Fe(OH)2+H(+)=Fe(OH)2(+)+X-COOH mol.m-3 The equilibrium constant for the overall dissociation of carbonic acid to form carbonate ions and two hydrogen ions, representing the combined first and second dissociation steps. This reaction controls carbonate speciation and pH buffering in aqueous systems and is fundamental for modeling carbon dioxide solubility, pH regulation, and carbonate mineral equilibria in terrestrial and aquatic environments. DPCO3 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for H2CO3= CO3(2-)+2H(+) mol2.m-6 The equilibrium constant for the acid dissolution of solid aluminum trihydroxide to form free aluminum ions and water in aqueous solution. This reaction controls aluminum hydroxide mineral stability and aluminum release in acidic conditions and is essential for modeling aluminum toxicity, soil acidification, and aluminum mobility in acid-affected terrestrial ecosystems. SHALO Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Al(OH)3(s)+3H(+) =Al(3+)+3H2O m6.mol-2 The equilibrium constant for the incongruent dissolution of solid aluminum trihydroxide to form aluminum monohydroxide complex ions and hydroxide ions. This reaction controls aluminum hydroxide mineral dissolution in neutral to alkaline conditions and affects aluminum speciation and mobility in well-buffered terrestrial and aquatic systems. SYAL1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Al(OH)3(s) = Al(OH)(2+)+2OH(-) mol2.m-6 The equilibrium constant for the partial acid dissolution of solid aluminum trihydroxide to form free aluminum ions, hydroxide ions, and water. This reaction represents an intermediate dissolution pathway under moderately acidic conditions and is important for modeling aluminum release and mobility in soils experiencing gradual acidification processes. SHAL1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Al(OH)3(s) + 2H(+)=Al(3+)+OH(-)+H2O m3.mol-1 The equilibrium constant for the congruent dissolution of solid aluminum trihydroxide to form aluminum dihydroxide complex ions and hydroxide ions. This reaction controls aluminum hydroxide mineral solubility in near-neutral conditions and affects aluminum speciation and bioavailability in moderately acidic to neutral terrestrial and aquatic environments. SYAL2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Al(OH)3(s) = Al(OH)2(+)+OH(-) mol.m-3 The equilibrium constant for the proton-promoted dissolution of solid aluminum trihydroxide to form aluminum dihydroxide complex ions and water. This reaction controls aluminum hydroxide dissolution under mildly acidic conditions and is fundamental for modeling aluminum mobilization and transport in soils undergoing moderate acidification. SHAL2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Al(OH)3(s)+H(+) = Al(OH)2(+) + H2O m3.mol-1 The equilibrium constant for the dissolution of solid aluminum trihydroxide to form dissolved aluminum trihydroxide species without change in coordination. This reaction controls the solubility of aluminum hydroxide minerals in neutral conditions and affects aluminum transport and biogeochemical cycling in pH-buffered terrestrial and aquatic systems. SPAL3 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Al(OH)3(s) = Al(OH)3(aq) 1 The equilibrium constant for the reaction of solid aluminum trihydroxide with hydroxide ions to form aluminum tetrahydroxide complex ions. This reaction controls aluminum hydroxide dissolution under strongly alkaline conditions and affects aluminum speciation and mobility in highly basic terrestrial and aquatic systems. SYAL4 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Al(OH)3(s)+OH(-) = Al(OH)4(-) m3.mol-1 The equilibrium constant for the hydrolytic dissolution of solid aluminum trihydroxide to form aluminum tetrahydroxide complex ions and protons. This reaction represents aluminum hydroxide dissolution through water coordination under alkaline conditions and is important for modeling aluminum behavior in high pH environments. SHAL4 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Al(OH)3(s)+H2O = Al(OH)4(-)+H(+) mol.m-3 The equilibrium constant for the complete acid dissolution of solid iron(III) trihydroxide to form free ferric iron ions and water. This reaction represents the primary dissolution pathway under acidic conditions and is critical for modeling iron mobilization, bioavailability, and redox chemistry in acid-impacted soils and surface waters. SHFEO Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Fe(OH)3(s)+3H(+) = Fe(3+)+3H2O m6.mol-2 The equilibrium constant for the incongruent dissolution of solid iron(III) trihydroxide to form iron(III) monohydroxide complex ions and hydroxide ions. This reaction controls iron hydroxide mineral dissolution in neutral to alkaline conditions and affects iron speciation and mobility in well-buffered terrestrial and aquatic systems. SYFE1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Fe(OH)3(s) = Fe(OH)(2+)+2OH(-) mol2.m-6 The equilibrium constant for the partial acid dissolution of solid iron(III) trihydroxide to form free ferric iron ions, hydroxide ions, and water. This reaction represents an intermediate dissolution pathway under moderately acidic conditions and is important for modeling iron release and mobility in soils undergoing gradual acidification processes. SHFE1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Fe(OH)3(s) + 2H(+)=Fe(3+)+OH(-)+H2O m3.mol-1 The equilibrium constant for the congruent dissolution of solid iron(III) trihydroxide to form iron(III) dihydroxide complex ions and hydroxide ions. This reaction controls iron hydroxide mineral solubility in near-neutral conditions and affects iron speciation and bioavailability in moderately acidic to neutral terrestrial and aquatic environments. SYFE2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Fe(OH)3(s) = Fe(OH)2(+)+OH(-) mol.m-3 The equilibrium constant for the proton-promoted dissolution of solid iron(III) trihydroxide to form iron(III) dihydroxide complex ions and water. This reaction controls iron hydroxide dissolution under mildly acidic conditions and is important for modeling iron mobilization and transport in soils and sediments experiencing moderate acidification. SHFE2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Fe(OH)3(s)+H(+) = Fe(OH)2(+) + H2O m3.mol-1 The equilibrium constant for the dissolution of solid iron(III) trihydroxide to form dissolved iron(III) trihydroxide species without change in coordination. This reaction controls the solubility of iron hydroxide minerals in neutral conditions and affects iron transport and biogeochemical cycling in pH-buffered terrestrial and aquatic systems. SPFE3 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Fe(OH)3(s) = Fe(OH)3(aq) 1 The equilibrium constant for the reaction of solid iron(III) trihydroxide with hydroxide ions to form iron(III) tetrahydroxide complex ions. This reaction controls iron hydroxide dissolution under strongly alkaline conditions and affects iron speciation and mobility in highly basic terrestrial and aquatic systems. SYFE4 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Fe(OH)3(s)+OH(-) = Fe(OH)4(-) m3.mol-1 The equilibrium constant for the hydrolytic dissolution of solid iron(III) trihydroxide to form iron(III) tetrahydroxide complex ions and protons. This reaction represents iron hydroxide dissolution through water coordination under alkaline conditions and is important for modeling iron behavior in high pH environments. SHFE4 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Fe(OH)3(s)+H2O = Fe(OH)4(-)+H(+) mol.m-3 The equilibrium constant for the proton-promoted dissolution of solid calcium carbonate to form calcium ions and bicarbonate ions. This reaction controls calcite and aragonite mineral dissolution under mildly acidic conditions and is fundamental for modeling carbonate weathering, carbon cycling, and alkalinity generation in terrestrial and marine environments. SHCAC1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for CaCO3(s)+H(+) = Ca(2+) + HCO3(-) 1 The equilibrium constant for the hydrolytic dissolution of solid calcium carbonate to form calcium ions, hydroxide ions, and bicarbonate ions. This reaction represents calcium carbonate dissolution through water coordination and is important for modeling carbonate mineral weathering and alkalinity generation in neutral to basic aquatic systems. SYCAC1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for CaCO3(s)+H2O = Ca(2+)+OH(-)+HCO3(-) mol2.m-6 The equilibrium constant for the complete acid dissolution of solid calcium carbonate to form calcium ions, dissolved carbon dioxide, and water. This reaction represents the primary carbonate mineral dissolution pathway under acidic conditions and is critical for modeling calcite weathering, carbon dioxide production, and ocean acidification processes. SHCAC2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for CaCO3(s)+2H(+)=Ca(2+)+CO2(aq)+H2O m3.mol-1 The equilibrium constant for the hydrolytic dissolution of solid calcium carbonate to form calcium ions, hydroxide ions, and dissolved carbon dioxide. This reaction represents calcium carbonate dissolution under basic conditions and is important for modeling carbonate mineral weathering and alkalinity generation in strongly alkaline terrestrial and aquatic systems. SYCAC2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for CaCO3(s)+H2O = Ca(2+)+2OH(-)+CO2(aq) mol3.m-9 The equilibrium constant for the proton-promoted dissolution of solid aluminum phosphate to form free aluminum ions and hydrogen phosphate ions. This reaction controls aluminum phosphate mineral dissolution under acidic conditions and affects aluminum and phosphorus availability and mobility in acid-impacted soils and sediments. SHA0P1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)+H(+) = Al(3+)+HPO4(2-) 1 The equilibrium constant for the hydrolytic dissolution of solid aluminum phosphate to form free aluminum ions, hydrogen phosphate ions, and hydroxide ions. This reaction represents aluminum phosphate dissolution through water coordination and affects aluminum and phosphorus speciation and bioavailability in neutral terrestrial and aquatic systems. SYA0P1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)+H2O =Al(3+)+HPO4(2-)+OH(-) mol2.m-6 The equilibrium constant for the dissolution of solid aluminum phosphate to form aluminum monohydroxide complex ions and hydrogen phosphate ions. This reaction controls aluminum phosphate mineral solubility in near-neutral conditions and affects aluminum and phosphorus cycling and bioavailability in moderately acidic to neutral environments. SPA1P1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)+H2O =Al(OH)(2+)+HPO4(2-) mol.m-3 The equilibrium constant for the hydroxide-promoted dissolution of solid aluminum phosphate to form hydrogen phosphate ions and aluminum dihydroxide complex ions. This reaction controls aluminum phosphate mineral dissolution under alkaline conditions and affects aluminum and phosphorus cycling in basic terrestrial and aquatic systems. SYA2P1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)+H2O+OH(-)=HPO4(2-)+Al(OH)2(+) 1 The equilibrium constant for the hydrolytic dissolution of solid aluminum phosphate to form hydrogen phosphate ions, aluminum dihydroxide complex ions, and protons. This reaction represents aluminum phosphate dissolution through water coordination and is important for modeling aluminum and phosphorus release in neutral to mildly basic conditions. SHA2P1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)+2H2O = HPO4(2-)+Al(OH)2(+)+H(+) mol2.m-6 The equilibrium constant for the hydroxide-promoted dissolution of solid aluminum phosphate to form dissolved aluminum trihydroxide species and hydrogen phosphate ions. This reaction controls aluminum phosphate mineral dissolution under strongly alkaline conditions and affects aluminum and phosphorus speciation in basic aquatic and terrestrial environments. SYA3P1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)+H2O+2OH(-)=Al(OH)3(aq)+HPO4(2-) m3.mol-1 The equilibrium constant for the complete hydrolytic dissolution of solid aluminum phosphate to form dissolved aluminum trihydroxide species, hydrogen phosphate ions, and protons. This reaction represents the dominant aluminum phosphate dissolution pathway under neutral conditions and is critical for modeling aluminum and phosphorus biogeochemical cycling. SHA3P1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)+3H2O=Al(OH)3(aq)+HPO4(2-)+2H(+) mol3.m-9 The equilibrium constant for the hydroxide-promoted dissolution of solid aluminum phosphate to form aluminum tetrahydroxide complex ions and hydrogen phosphate ions. This reaction controls aluminum phosphate mineral dissolution under strongly alkaline conditions and affects aluminum and phosphorus speciation and mobility in highly basic terrestrial and aquatic systems. SYA4P1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)+H2O+3OH(-)=Al(OH)4(-)+HPO4(2-) m6.mol-2 The equilibrium constant for the complete hydrolytic dissolution of solid aluminum phosphate to form aluminum tetrahydroxide complex ions, hydrogen phosphate ions, and protons. This reaction represents the dominant aluminum phosphate dissolution pathway under alkaline conditions and is critical for modeling aluminum and phosphorus biogeochemical cycling in basic environments. SHA4P1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)+4H2O=Al(OH)4(-)+HPO4(2-)+3H(+) mol4.m-12 The equilibrium constant for the acid dissolution of solid aluminum phosphate to form free aluminum ions and dihydrogen phosphate ions. This reaction controls aluminum phosphate mineral dissolution under acidic conditions and affects aluminum and phosphorus availability and mobility in strongly acidic soils and sediments. SHA0P2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)+2H(+)=Al(3+)+H2PO4(-) m3.mol-1 The equilibrium constant for the hydrolytic dissolution of solid aluminum phosphate to form free aluminum ions, dihydrogen phosphate ions, and hydroxide ions. This reaction represents aluminum phosphate dissolution through water coordination and affects aluminum and phosphorus speciation and bioavailability in neutral to basic terrestrial and aquatic systems. SYA0P2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)+2H2O=Al(3+)+H2PO4(-)+2OH(-) mol3.m-9 The equilibrium constant for the hydrolytic dissolution of solid aluminum phosphate to form aluminum monohydroxide complex ions, dihydrogen phosphate ions, and hydroxide ions. This reaction controls aluminum phosphate mineral solubility and affects aluminum and phosphorus cycling in moderately acidic to neutral terrestrial and aquatic environments. SYA1P2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)+2H2O=Al(OH)(2+)+H2PO4(-)+OH(-) mol2.m-6 The equilibrium constant for the proton-promoted dissolution of solid aluminum phosphate to form aluminum monohydroxide complex ions and dihydrogen phosphate ions. This reaction controls aluminum phosphate mineral dissolution under mildly acidic conditions and affects aluminum and phosphorus speciation in moderately acidic soils and sediments. SHA1P2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)+H2O+H(+)=Al(OH)(2+)+H2PO4(-) 1 The equilibrium constant for the hydrolytic dissolution of solid aluminum phosphate to form aluminum dihydroxide complex ions and dihydrogen phosphate ions. This reaction controls aluminum phosphate mineral solubility in near-neutral conditions and affects aluminum and phosphorus cycling and bioavailability in moderately acidic to neutral environments. SPA2P2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)+2H2O=Al(OH)2(+)+H2PO4(-) mol.m-3 The equilibrium constant for the hydroxide-promoted dissolution of solid aluminum phosphate to form dissolved aluminum trihydroxide species and dihydrogen phosphate ions. This reaction controls aluminum phosphate mineral dissolution under alkaline conditions and affects aluminum and phosphorus speciation in basic terrestrial and aquatic systems. SYA3P2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)+2H2O+OH(-)=Al(OH)3(aq)+H2PO4(-) 1 The equilibrium constant for the complete hydrolytic dissolution of solid aluminum phosphate to form dissolved aluminum trihydroxide species, dihydrogen phosphate ions, and protons. This reaction represents the dominant aluminum phosphate dissolution pathway under neutral conditions and is critical for modeling aluminum and phosphorus biogeochemical cycling. SHA3P2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)+3H2O=Al(OH)3(aq)+H2PO4(-)+H(+) mol2.m-6 The equilibrium constant for the hydroxide-promoted dissolution of solid aluminum phosphate to form aluminum tetrahydroxide complex ions and dihydrogen phosphate ions. This reaction controls aluminum phosphate mineral dissolution under strongly alkaline conditions and affects aluminum and phosphorus speciation and mobility in highly basic terrestrial and aquatic systems. SYA4P2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)+2H2O+2OH(-)=Al(OH)4(-)+H2PO4(-) m3.mol-1 The equilibrium constant for the complete hydrolytic dissolution of solid aluminum phosphate to form aluminum tetrahydroxide complex ions, dihydrogen phosphate ions, and protons. This reaction represents the dominant aluminum phosphate dissolution pathway under alkaline conditions and is critical for modeling aluminum and phosphorus biogeochemical cycling in basic environments. SHA4P2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for AlPO4(s)+4H2O=Al(OH)4(-)+H2PO4(-)+2H(+) mol3.m-9 The equilibrium constant for the proton-promoted dissolution of solid iron phosphate to form free ferric iron ions and hydrogen phosphate ions. This reaction controls iron phosphate mineral dissolution under acidic conditions and affects iron and phosphorus availability and mobility in acid-impacted soils and sediments. SHF0P1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)+H(+)= Fe(3+)+HPO4(2-) 1 The equilibrium constant for the hydrolytic dissolution of solid iron phosphate to form free ferric iron ions, hydrogen phosphate ions, and hydroxide ions. This reaction represents iron phosphate dissolution through water coordination and affects iron and phosphorus speciation and bioavailability in neutral terrestrial and aquatic systems. SYF0P1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)+H2O = Fe(3+)+HPO4(2-)+OH(-) mol2.m-6 The equilibrium constant for the dissolution of solid iron phosphate to form iron monohydroxide complex ions and hydrogen phosphate ions. This reaction controls iron phosphate mineral solubility in near-neutral conditions and affects iron and phosphorus cycling and bioavailability in moderately acidic to neutral environments. SPF1P1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)+H2O = Fe(OH)(2+)+HPO4(2-) mol.m-3 The equilibrium constant for the hydroxide-promoted dissolution of solid iron phosphate to form hydrogen phosphate ions and iron dihydroxide complex ions. This reaction controls iron phosphate mineral dissolution under alkaline conditions and affects iron and phosphorus cycling in basic terrestrial and aquatic systems. SYF2P1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)+H2O+OH(-)=HPO4(2-)+Fe(OH)2(+) 1 The equilibrium constant for the hydrolytic dissolution of solid iron phosphate to form hydrogen phosphate ions, iron dihydroxide complex ions, and protons. This reaction represents iron phosphate dissolution through water coordination and is important for modeling iron and phosphorus release in neutral to mildly basic conditions. SHF2P1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)+2H2O = HPO4(2-)+Fe(OH)2(+)+H(+) mol2.m-6 The equilibrium constant for the hydroxide-promoted dissolution of solid iron phosphate to form dissolved iron trihydroxide species and hydrogen phosphate ions. This reaction controls iron phosphate mineral dissolution under strongly alkaline conditions and affects iron and phosphorus speciation in basic aquatic and terrestrial environments. SYF3P1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)+H2O+2OH(-)=Fe(OH)3(aq)+HPO4(2-) m3.mol-1 The equilibrium constant for the complete hydrolytic dissolution of solid iron phosphate to form dissolved iron trihydroxide species, hydrogen phosphate ions, and protons. This reaction represents the dominant iron phosphate dissolution pathway under neutral conditions and is critical for modeling iron and phosphorus biogeochemical cycling. SHF3P1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)+3H2O=Fe(OH)3(aq)+HPO4(2-)+2H(+) mol3.m-9 The equilibrium constant for the hydroxide-promoted dissolution of solid iron phosphate to form iron tetrahydroxide complex ions and hydrogen phosphate ions. This reaction controls iron phosphate mineral dissolution under strongly alkaline conditions and affects iron and phosphorus speciation and mobility in highly basic terrestrial and aquatic systems. SYF4P1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)+H2O+3OH(-)=Fe(OH)4(-)+HPO4(2-) m6.mol-2 The equilibrium constant for the complete hydrolytic dissolution of solid iron phosphate to form iron tetrahydroxide complex ions, hydrogen phosphate ions, and protons. This reaction represents the dominant iron phosphate dissolution pathway under alkaline conditions and is critical for modeling iron and phosphorus biogeochemical cycling in basic environments. SHF4P1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)+4H2O=Fe(OH)4(-)+HPO4(2-)+3H(+) mol4.m-12 The equilibrium constant for the acid dissolution of solid iron phosphate to form free ferric iron ions and dihydrogen phosphate ions. This reaction controls iron phosphate mineral dissolution under acidic conditions and affects iron and phosphorus availability and mobility in strongly acidic soils and sediments. SHF0P2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)+2H(+)=Fe(3+)+H2PO4(-) m3.mol-1 The equilibrium constant for the hydrolytic dissolution of solid iron phosphate to form free ferric iron ions, dihydrogen phosphate ions, and hydroxide ions. This reaction represents iron phosphate dissolution through water coordination and affects iron and phosphorus speciation and bioavailability in neutral to basic terrestrial and aquatic systems. SYF0P2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)+2H2O =Fe(3+)+H2PO4(-)+2OH(-) mol3.m-9 The equilibrium constant for the hydrolytic dissolution of solid iron phosphate to form iron monohydroxide complex ions, dihydrogen phosphate ions, and hydroxide ions. This reaction controls iron phosphate mineral solubility and affects iron and phosphorus cycling in moderately acidic to neutral terrestrial and aquatic environments. SYF1P2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)+2H2O=Fe(OH)(2+)+H2PO4(-)+OH(-) mol2.m-6 The equilibrium constant for the proton-promoted dissolution of solid iron phosphate to form iron monohydroxide complex ions and dihydrogen phosphate ions. This reaction controls iron phosphate mineral dissolution under mildly acidic conditions and affects iron and phosphorus speciation in moderately acidic soils and sediments. SHF1P2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)+H2O+H(+)=Fe(OH)(2+)+H2PO4(-) 1 The equilibrium constant for the hydrolytic dissolution of solid iron phosphate to form iron dihydroxide complex ions and dihydrogen phosphate ions. This reaction controls iron phosphate mineral solubility in near-neutral conditions and affects iron and phosphorus cycling and bioavailability in moderately acidic to neutral environments. SPF2P2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)+2H2O=Fe(OH)2(+)+H2PO4(-) mol.m-3 The equilibrium constant for the hydroxide-promoted dissolution of solid iron phosphate to form dissolved iron trihydroxide species and dihydrogen phosphate ions. This reaction controls iron phosphate mineral dissolution under alkaline conditions and affects iron and phosphorus speciation in basic terrestrial and aquatic systems. SYF3P2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)+2H2O+OH(-)=Fe(OH)3(aq)+H2PO4(-) 1 The equilibrium constant for the complete hydrolytic dissolution of solid iron phosphate to form dissolved iron trihydroxide species, dihydrogen phosphate ions, and protons. This reaction represents the dominant iron phosphate dissolution pathway under neutral conditions and is critical for modeling iron and phosphorus biogeochemical cycling. SHF3P2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)+3H2O=Fe(OH)3(aq)+H2PO4(-)+H(+) mol2.m-6 The equilibrium constant for the hydroxide-promoted dissolution of solid iron phosphate to form iron tetrahydroxide complex ions and dihydrogen phosphate ions. This reaction controls iron phosphate mineral dissolution under strongly alkaline conditions and affects iron and phosphorus speciation and mobility in highly basic terrestrial and aquatic systems. SYF4P2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)+2H2O+2OH(-)=Fe(OH)4(-)+H2PO4(-) m3.mol-1 The equilibrium constant for the complete hydrolytic dissolution of solid iron phosphate to form iron tetrahydroxide complex ions, dihydrogen phosphate ions, and protons. This reaction represents the dominant iron phosphate dissolution pathway under alkaline conditions and is critical for modeling iron and phosphorus biogeochemical cycling in basic environments. SHF4P2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for FePO4(s)+4H2O=Fe(OH)4(-)+H2PO4(-)+2H(+) mol3.m-9 The equilibrium constant for the proton-promoted dissolution of solid calcium hydrogen phosphate to form calcium ions and dihydrogen phosphate ions. This reaction controls calcium hydrogen phosphate mineral dissolution under acidic conditions and affects calcium and phosphorus availability and mobility in acid-impacted soils and sediments. SHCAD2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for CaHPO4(s)+H(+)=Ca(2+)+H2PO4(-) 1 The equilibrium constant for the hydrolytic dissolution of solid calcium hydrogen phosphate to form calcium ions, dihydrogen phosphate ions, and hydroxide ions. This reaction represents calcium hydrogen phosphate dissolution through water coordination and affects calcium and phosphorus speciation and bioavailability in neutral terrestrial and aquatic systems. SYCAD2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for CaHPO4(s)+H2O=Ca(2+)+H2PO4(-)+OH(-) mol2.m-6 The equilibrium constant for the acid dissolution of solid hydroxyapatite to form hydrogen phosphate ions, calcium ions, and water. This reaction controls hydroxyapatite mineral dissolution under acidic conditions and is critical for modeling bone and tooth mineral dissolution, calcium and phosphorus bioavailability, and apatite weathering in acid-impacted environments. SHCAH1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Ca5(PO4)3OH(s)+4H(+)=3HPO4(2-)+5Ca(2+)+H2O mol3.m-9 The equilibrium constant for the hydrolytic dissolution of solid hydroxyapatite to form calcium ions, hydrogen phosphate ions, and hydroxide ions. This reaction represents hydroxyapatite dissolution through water coordination under neutral to basic conditions and affects calcium and phosphorus cycling in biological and geological systems. SYCAH1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Ca5(PO4)3OH(s)+3H2O=5Ca(2+)+3HPO4(2-)+4OH(-) mol11.m-33 The equilibrium constant for the mixed acid-base dissolution of solid hydroxyapatite to form hydrogen phosphate ions, calcium ions, and water. This reaction represents a complex dissolution pathway involving both proton consumption and hydroxide reactants and is important for modeling hydroxyapatite behavior under variable pH conditions. SHCAH2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Ca5(PO4)3OH(s)+7H(+)+3OH(-)=3HPO4(2-)+5Ca(2+)+4H2O m9.mol-3 The equilibrium constant for the hydrolytic dissolution of solid hydroxyapatite to form hydrogen phosphate ions, calcium ions, and hydroxide ions. This reaction represents the primary hydroxyapatite dissolution pathway under neutral conditions and is fundamental for modeling calcium and phosphorus biogeochemical cycling, bone and tooth mineral stability, and apatite weathering processes. SYCAH2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Equilibrium constant for Ca5(PO4)3OH(s)+3H2O=3HPO4(2-)+5Ca(2+)+4OH(-) mol11.m-33 The Michaelis-Menten half-saturation constant for urea hydrolysis by urease enzymes in soil systems. This parameter determines the urea concentration at which hydrolysis proceeds at half-maximum rate and is critical for modeling nitrogen release kinetics from urea fertilizers in agricultural and environmental systems. DUKM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Either "Km" or "Michaelis constant" is the attribute. Should be "urea hydrolyis" (equation) similar to the equilibrium constants above SoluteParMod.txt Km for urea hydrolysis g.m-3 The inhibition constant for product inhibition of urea hydrolysis following Michaelis-Menten kinetics in soil systems. This parameter quantifies how hydrolysis products reduce the rate of continued urea breakdown and is important for modeling nitrogen release patterns and ammonia volatilization from urea fertilizers in agricultural environments. DUKI Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Either "Ki" or "Inhibition constant" should be the attribute. Same comment regarding hydrolysis as above. SoluteParMod.txt Ki for urea hydrolysis g.m-3 The thermodynamic activity of solid phases in chemical equilibrium calculations, conventionally set to unity for pure solid phases. This standard assumption simplifies equilibrium calculations for mineral dissolution and precipitation reactions and is fundamental to modeling chemical weathering and soil mineral transformations in geochemical systems. A0 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Activity for solids 1 The capacity of soil organic carbon to hold and exchange positively charged ions including calcium, magnesium, potassium, and sodium through functional groups on organic matter surfaces. This property controls nutrient retention and availability in soils and is essential for modeling soil fertility and plant nutrition in terrestrial ecosystems. COOH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Cation exchange capacity of soil organic carbon eq.g-1{C} The maximum Ca(2+) concentration in the soil. It is EcoSIM specific. CCAMX Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) I like this decomposition SoluteParMod.txt Maximum calcium concentration mol.m-3 The kinetic parameter governing first-order ammonium release from fertilizer particles following application to soil systems. This constant determines the rate at which ammonium becomes available for plant uptake and nitrification processes and is critical for modeling nitrogen dynamics and fertilizer efficiency in agricultural ecosystems. RFertNH4SpecReleaz Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt is "X release" something we could write an equation for (e.g., NH4+(s) -> NH4+(aq))? Specific rate constants for ammonium release after fertilizer application h-1 The kinetic parameter governing first-order ammonia release from fertilizer particles following application to soil systems. This constant controls the rate of ammonia volatilization from fertilizers and is essential for modeling nitrogen losses and atmospheric ammonia emissions in agricultural environments. RFertNH3SpecReleaz Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Specific rate constants for ammonia release after fertilizer application h-1 The kinetic parameter governing first-order urea release and hydrolysis from fertilizer particles following application to soil systems. This constant determines the rate at which urea is converted to ammonium and is fundamental for modeling nitrogen availability and timing in fertilized agricultural systems. RFertUreaSpecHydrol Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Specific rate constants for urea release after fertilizer application h-1 The kinetic parameter governing first-order nitrate release from fertilizer particles following application to soil systems. This constant controls the rate at which nitrate becomes available for plant uptake and denitrification processes and is crucial for modeling nitrogen cycling and leaching losses in fertilized ecosystems. RFertNO3SpecReleaz Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt link concept to "chemical flux" and "nitrate" Specific rate constants for nitrate release after fertilizer application h-1 It refers to the rate parameter in the first order kinetics based release of H2PO4 after fertilization. SPPO4 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoluteParMod.txt Specific rate constants for dihydrogen phosphate release after fertilizer application h-1 It is a threshold parameter over which leaf starts doing nutrient remobilization. The threshold is tested using the ratio of the hours that leaf-off criterion is met with the total hours required for leave-off to occur. FracHour4LeafoffRemob Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Remove? Allocation parameter 1 It is an allometric parameter for leaf that when carbon is allocated for leaf growth, it should not be less than this minimum fraction. PART1X Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Minimum fraction of growth allocated to leaf 1 It is an allometric parameter for petiole that when carbon is allocated for petiole growth, it should not be less than this minimum fraction. PART2X Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Minimum fraction of growth allocated to petiole 1 The maximum turnover rate of nonstructural carbon reserves through respiratory processes to support canopy development and growth. This parameter determines how rapidly plants can mobilize stored carbon for metabolic needs and is essential for modeling plant carbon allocation and growth responses to environmental conditions. VMXC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Rate constant for nonstructural carbon oxidation in respiration h-1 The specific senescence rate of canopy organs including leaves, petioles, and reproductive structures at the end of the growing season, assuming linear senescence kinetics. This parameter controls the timing and rate of litterfall and is critical for modeling seasonal carbon and nutrient cycling in terrestrial ecosystems. FSNR Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Rate constant for LitrFall at end of growing season h-1 The threshold accumulation of hours during which grain filling ceases before plants reach physiological maturity. This parameter determines the timing of crop maturation and is important for modeling reproductive phenology and harvest timing in agricultural systems. Hours4PhyslMature Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Number of hours with no grain filling required for physilogical maturity h The threshold accumulation of hours between physiological maturity and the initiation of complete plant senescence. This parameter controls the duration of the post-maturity phase and affects the timing of nutrient remobilization and litterfall in agricultural and natural ecosystems. Hours4FullSenes Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Number of hours until full senescence after physl maturity h The maximum fraction of sapwood and root biomass that can exist as remobilizable carbon reserves available for translocation to support plant growth and metabolism. This parameter determines the upper limit of carbon storage capacity and affects plant resilience to environmental stress and seasonal carbon allocation patterns in woody plants. XFRX Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Maximum storage carbon content for remobiln from stalk, root reserves g{C} The rate parameter governing nonstructural biomass transfer between root and stalk storage pools, assuming exchange follows concentration gradients. This constant controls the speed of carbon redistribution within plants and affects the temporal dynamics of carbon allocation and plant responses to changing resource availability. XFRY Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Rate const for remobiln to storage from stalk,root reserves h-1 Lower bound on the carbon mass of a shoot branch or of the mycorrhizae, relative to that of the root, used to weight the concentration gradient that drives the transfer of nonstructural carbon, nitrogen and phosphorus between them. In the exchange between root and mycorrhizae it sets a floor on the mycorrhizal weight; in the exchange between each branch and each root layer it keeps either weight from falling below this fraction of the other, so the transfer does not stop when one partner is small. FSNK Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) GrosubPars.txt Minimum ratio of branch or mycorrhizae to root for calculating carbon transfer 1 The rate constant determining the fraction of maintenance carbon, nitrogen, and phosphorus deficit that triggers remobilization from stalk storage pools. This parameter controls nutrient recycling within plants and affects plant responses to nutrient limitation and environmental stress conditions. FXFS Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Rate constant for remobilization of stalk C,N,P h-1 Rate parameter that is used to compute the gradient nonstructural biomass transfer between mycorrhizae and roots. FMYC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Rate constant for root-mycorrhizal C,N,P exchange h-1 The inhibition parameter quantifying nitrogen limitation effects on canopy growth using Michaelis-Menten kinetics based on nonstructural nitrogen availability. This constant determines the sensitivity of plant growth to nitrogen deficiency and is essential for modeling nutrient limitation and plant productivity responses in nitrogen-limited ecosystems. CNKI Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Nonstructural nitrogen inhibition constant on growth g{N}.g-1{C} The inhibition parameter quantifying phosphorus limitation effects on canopy growth using Michaelis-Menten kinetics based on nonstructural phosphorus availability. This constant determines the sensitivity of plant growth to phosphorus deficiency and is crucial for modeling nutrient limitation and plant productivity in phosphorus-limited terrestrial ecosystems. CPKI Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Nonstructural phosphorus inhibition constant on growth g{P}.g-1{C} The maintenance respiration rate per unit of shoot structural nitrogen content used to calculate canopy maintenance carbon costs. This parameter quantifies the metabolic carbon expenditure required to maintain existing plant tissues and is fundamental for modeling plant carbon budgets and net primary productivity in terrestrial ecosystems. RmSpecPlant Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Specific maintenance respiration rate g{C}.g-1{N}.h-1 The threshold water potential below which canopy organ extension and growth processes cease due to insufficient turgor pressure. This parameter determines plant responses to water stress and drought conditions and is critical for modeling plant growth limitations and ecosystem productivity under varying water availability. PSIMin4OrganExtens Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Minimum water potential for organ expansion,extension MPa The lower boundary of stomatal resistance to carbon dioxide diffusion between leaf internal air spaces and the atmosphere. This parameter sets the maximum possible rate of carbon dioxide uptake for photosynthesis and is fundamental for modeling plant water use efficiency and carbon assimilation under varying environmental conditions. RCMN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Minimum stomatal resistance to carbon dioxide s.m-1 The distance from the root tip where secondary root formation begins, effectively extending the zone of influence for root growth and resource acquisition. This parameter determines the spatial distribution of root branching and affects the calculation of metabolic sink strength for root development in soil profile modeling. RTDPX Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Distance behind growing point for secondary roots m The lower boundary for the mean length of secondary root branches in root system architecture. This parameter constrains root system development and affects the spatial extent of nutrient and water uptake, influencing plant resource acquisition efficiency in terrestrial ecosystems. Root2ndMeanLensMin Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Minimum average secondary root length m The measure of root tissue stiffness quantifying resistance to mechanical deformation under stress including bending, tension, and compression forces. This parameter affects root penetration through soil layers and resistance to soil compaction, influencing root system development and plant anchorage in terrestrial environments. EMODR Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Root modulus of elasticity MPa The ratio of photosynthetic electron transport events to photons absorbed by the photosynthetic apparatus, quantifying light use efficiency. This parameter determines how effectively plants convert absorbed photosynthetically active radiation (PAR) into chemical energy and is fundamental for modeling primary productivity and carbon fixation in terrestrial ecosystems under varying light conditions. QNTM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Quantum efficiency umol{e-}.umol-1{PAR} The curvature parameter that describes the non-linear relationship between electron transport rate and photosynthetically active radiation in the Farquhar photosynthesis model. This parameter determines the shape of the light response curve and is essential for accurately modeling photosynthetic responses to varying light conditions in terrestrial ecosystems. CURV Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Shape parameter for electron transport response to photosynthetically active radiation 1 The stoichiometric requirement of electrons needed for carbon dioxide fixation by ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) enzymes in C3 photosynthesis. This parameter links photosynthetic electron transport to carbon assimilation and is fundamental for modeling C3 plant productivity and energy conversion efficiency. ELEC3 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Electron requirement for carbon dioxide fixation by rubisco umol{e-}.umol-1{CO2} The stoichiometric requirement of electrons needed for carbon dioxide fixation by phosphoenolpyruvate (PEP) carboxylase enzymes in C4 photosynthesis. This parameter determines the energy cost of carbon dioxide concentration mechanisms in C4 plants and is crucial for modeling C4 plant productivity and water use efficiency. ELEC4 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Electron requirement for carbon dioxide fixation by PEP carboxylase umol{e-}.umol-1{CO2} The inhibition constant for product inhibition of C3 photosynthetic carbon leakage from bundle sheath cells to mesophyll cells in C4 plants. This parameter quantifies the efficiency of carbon dioxide concentration mechanisms and affects the modeling of C4 photosynthetic advantage under different environmental conditions. CO2KI Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Ki for C3 leakage from bundle sheath to mesophyll in C4 umol.L-1 The fraction of decarboxylation reactions in bundle sheath cells that produce carbon dioxide during C4 photosynthesis. This parameter determines the efficiency of carbon dioxide concentration mechanisms and affects the modeling of C4 photosynthetic advantage and water use efficiency under different environmental conditions. FCMassCO2BundleSheath_node Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Partition decarboxylation to carbon dioxide in C4 1 The fraction of carbon leakage from bundle sheath cells that occurs as bicarbonate ions during C4 photosynthesis. This parameter quantifies inefficiencies in the C4 carbon concentration mechanism and affects the modeling of C4 plant productivity and competitive advantage over C3 plants. FCMassHCO3BundleSheath_node Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Partition leakage to bicarbonate in C4 1 The atmospheric carbon dioxide concentration at which photosynthetic carbon dioxide uptake equals carbon dioxide release from photorespiration and mitochondrial respiration in C4 plants. This parameter defines the lower limit for net carbon dioxide assimilation and is fundamental for modeling C4 plant responses to varying atmospheric carbon dioxide concentrations. COMP4 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt C4 carbon dioxide compensation point umol.L-1 The mass ratio of water to carbon in leaf tissues, representing the hydration state of leaf biomass. This parameter affects leaf physiology including photosynthetic capacity, transpiration rates, and mechanical properties, and is important for modeling plant water relations and drought responses in terrestrial ecosystems. FDML Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt This is really a mass ratio (gram H20/gram C) Leaf water content g{H2O}.g-1{C} The volumetric water content per unit carbon biomass in bundle sheath cells of C4 plants during carbon dioxide fixation processes. This parameter affects the concentration of metabolites and enzymes in bundle sheath cells and influences the efficiency of C4 photosynthetic carbon concentration mechanisms. FBS Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Leaf water content in bundle sheath, in C4 carbon dioxide fixation m3{H2O}.g-1{C} The volumetric water content per unit carbon biomass in mesophyll cells of C4 plants during carbon dioxide fixation processes. This parameter influences the concentration of photosynthetic enzymes and substrates in mesophyll cells and affects the initial carbon dioxide capture efficiency in C4 photosynthesis. FMP Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Leaf water content in mesophyll in C4 carbon dioxide fixation m3{H2O}.g-1{C} The ratio of minimum to maximum nitrogen:carbon or phosphorus:carbon ratios in leaf tissues based on plant functional type stoichiometric constraints. This parameter defines the lower bounds of leaf nutrient content and affects photosynthetic capacity and nutrient cycling in ecosystem models. ZPLFM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Minimum N:C,P:C in leaves relative to max values from PFT file 1 The ratio of minimum to maximum nitrogen:carbon or phosphorus:carbon ratios in grain tissues based on plant functional type stoichiometric constraints. This parameter defines the lower bounds of grain nutrient content and affects seed quality, reproductive success, and nutrient cycling through crop harvest in agricultural ecosystems. ZPGRM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Minimum N:C,P:C in grain relative to max values from PFT file 1 The fraction of stalk cross-sectional area occupied by xylem and phloem tissues that facilitate water and metabolite transport between plant organs. This parameter determines hydraulic conductivity and heat transfer efficiency in plant stems and affects whole-plant water relations and thermal regulation in terrestrial ecosystems. FSTK Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Fraction of stalk area contributing to water, heat flow 1 The maximum radius of xylem and phloem transport tubes located at the outer surface of plant stalks that facilitate transpiration and metabolite transport. This parameter constrains hydraulic architecture and affects maximum water transport capacity and plant size limitations in woody species. ZSTX Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Maximum stalk inner radius for tranpsiration m The carbon-based mass density of stalk tissues used to calculate stalk volume from biomass measurements. This parameter relates plant structural biomass to physical dimensions and is important for modeling plant architecture, mechanical stability, and carbon storage in woody terrestrial ecosystems. StalkMassDensity Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Stalk density Mg{C}.m-3 Stalk volume per g carbon biomass. SpecStalkVolume Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Specific volume m3.g-1{C} It is a model-specific scaling parameter for computing biomass allocation to canopy foliage. FRTX Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Fraction used to calculate woody fraction of stalk,root 1 The half-saturation parameter for nonstructural carbon concentration effects on seed setting processes using Michaelis-Menten kinetics. This constant determines the carbon availability threshold for successful reproduction and is essential for modeling reproductive allocation and seed production responses to carbon limitation in plant populations. SETC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Km for nonstructural carbon concentration on seed set g.g-1 The half-saturation parameter for nonstructural nitrogen concentration effects on seed setting processes using Michaelis-Menten kinetics. This constant determines the nitrogen availability threshold for successful reproduction and is crucial for modeling reproductive success and population dynamics under nitrogen-limited conditions. SETN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Km for nonstructural nitrogen concentration on seed set g.g-1 The half-saturation parameter for nonstructural phosphorus concentration effects on seed setting processes using Michaelis-Menten kinetics. This constant determines the phosphorus availability threshold for successful reproduction and is important for modeling reproductive allocation in phosphorus-limited terrestrial ecosystems. SETP Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Km for nonstructural phosphorus concentration on seed set g.g-1 An exponent parameter to compute leaf area expansion in the model. SLA2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Remove? Parameter for calculating leaf area expansion 1 An exponent parameter to compute petiole length expansion in the model. SSL2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Remove? Parameter for calculating petiole extension 1 An exponent parameter to compute stalk volume expansion in the model. SNL2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Remove? Parameter for calculating stalk extension 1 The upper boundary of carbon to nitrogen ratios that constrains the minimum nitrogen flow accompanying nonstructural carbon transfers between plant storage pools. This stoichiometric constraint ensures coupled carbon-nitrogen cycling within plants and affects nutrient allocation and plant growth responses to changing resource availability. CNMX Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Maximum C:N ratio for nonstructural nitrogen transfer g.g-1 The upper boundary of carbon to phosphorus ratios that constrains the minimum phosphorus flow accompanying nonstructural carbon transfers between plant storage pools. This stoichiometric constraint maintains coupled carbon-phosphorus cycling within plants and influences nutrient allocation patterns and plant responses to phosphorus limitation. CPMX Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Maximum C:P ratio for nonstructural phosphorus transfer g.g-1 The lower boundary of carbon to nitrogen ratios that constrains the maximum nitrogen flow accompanying nonstructural carbon transfers between plant storage pools. This stoichiometric constraint prevents excessive nitrogen allocation and maintains balanced nutrient cycling within plant tissues and storage compartments. CNMN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Minimum C:N ratio for nonstructural nitrogen transfer g.g-1 The lower boundary of carbon to phosphorus ratios that constrains the maximum phosphorus flow accompanying nonstructural carbon transfers between plant storage pools. This stoichiometric constraint prevents excessive phosphorus allocation and maintains balanced nutrient cycling within plant tissues and storage systems. CPMN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Minimum C:P ratio for nonstructural phosphorus transfer g.g-1 The mass of atmospheric nitrogen converted to ammonia per unit of carbon oxidized by nitrogen-fixing bacteria in root nodules. This parameter quantifies the energetic efficiency of biological nitrogen fixation and is essential for modeling symbiotic nitrogen inputs and plant nutrition in nitrogen-limited terrestrial ecosystems. EN2F Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Nitrogen fixation yield from carbon oxidation g{N}.g-1{C} The maximum rate at which nitrogen-fixing bacteria oxidize nonstructural biomass carbon to support their metabolic processes and nitrogen fixation activity. This parameter determines the carbon cost of nitrogen fixation and affects the modeling of plant-bacteria carbon exchange and symbiotic nitrogen inputs to ecosystems. VMXO Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Specific respiration rate by bacterial nitrogen fixers g.g-1.h-1 The half-saturation parameter for nodule carbon biomass effects on maintenance respiration using Michaelis-Menten kinetics in nitrogen-fixing root nodules. This constant determines the relationship between nodule size and metabolic activity and is important for modeling the carbon costs of maintaining nitrogen-fixing symbioses. SPNDLK Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Half saturation parameter for nodule maintenance respiration g{C} The rate at which nitrogen-fixing bacteria lose metabolic activity and viability following first-order decay kinetics in root nodule systems. This parameter quantifies bacterial mortality and turnover rates and affects the modeling of nodule senescence and symbiotic nitrogen fixation capacity over time. SPNDL Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Specific decomposition rate by bacterial N2 fixers h-1 A model-specific parameter to compute carbon, nitrogen and phosphorus exchange between nodule bacteria and their hosting plants. CCNGR Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Parameter to calculate nonstructural C,N,P exchange 1 Initial nodule carbon biomass C at the time of infection of the hosting plant. The infection is applied when nodule biomass of the hosting plant is zero. NodulBiomCAtInfection Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Initial bacterial mass at infection g{C} Half saturation parameter for modeling bacterial use of nonstructural nitrogen using the Michaelis-Menten kinetics. CZKM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Km for nonstructural nitrogen uptake by bacteria g{N} Half saturation parameter for modeling bacterial use of nonstructural phosphorus using the Michaelis-Menten kinetics. CPKM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Km for nonstructural phosphorus uptake by bacteria g{P} Minimum fraction of root C can be recycled during root death. RCCZR Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Minimum fractions for root carbon recycling 1 Maximum fraction of root C can be recycled during root death. RCCYR Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Maximum fractions for root carbon recycling 1 Maximum fraction of root nitrogen can be recycled during root death. RCCXR Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Maximum fractions for root nitrogen recycling 1 Maximum fraction of root phosphorus can be recycled during root death. RCCQR Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Maximum fractions for root phosphorus recycling 1 Minimum fraction of nodule bacteria C can be recycled during root death. RCCZN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Minimum fractions for bacteria carbon recycling 1 Maximum fraction of nodule bacteria C can be recycled during root death. RCCYN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Maximum fractions for bacteria carbon recycling 1 Maximum fraction of nodule bacteria nitrogen can be recycled during root death. RCCXN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Maximum fractions for bacteria nitrogen recycling 1 Maximum fraction of nodule bacteria phosphorus can be recycled during root death. RCCQN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Maximum fractions for bacteria phosphorus recycling 1 Number of hours need to accumulate to trigger litterfall after leaf maturity. HoursReq4LiterfalAftMature Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Required hours after physical maturity until start of litterfall h Rate parameter to compute the gradient driven exchange of carbon, nitrogen, and phosphorus between seasonal storage and nonstructural pools. FRSV Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Rate constant for remobiln of storage chemical element during leafout h-1 Rate parameter to compute the gradient driven carbon exchange between stalk and leaf reserve pools. FXFY Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Rate constant for leaf-reserve nonstructural carbon exchange h-1 Rate parameter to compute the gradient driven nitrogen and phosphorus exchange between stalk and leaf reserve pools. FXFZ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Rate constant for leaf-reserve nonstructural nitrogen and phosphorus exchange h-1 Rate parameter for gradient-driven exchange of nonstructural carbon, nitrogen, and phosphorus between shoot and seasonal storage pools. RateK4ShootSeaStoreNonstEXfer Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Rate constant for leaf-storage nonstructural chemical element exchange h-1 Rate parameter for gradient driven exchange of nonstructural carbon, nitrogen, and phosphorus between root and seasonal storage pools. RateK4RootSeaStorNonstEXfer Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Rate constant for root-storage nonstructural chemical element exchange h-1 Fraction of mobilized seasonal storage allocated to roots upon leaf out. FXRT Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Root partitioning of storage carbon during leafout 1 Fraction of mobilized seasonal storage allocated to shoots upon leaf out. FXSH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Shoot partitioning of storage carbon during leafout 1 Rate constant for modeling nonstructural C,N and P exchange between hosting plants and nodule bacteria. FXRN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Rate constant for plant-bacteria nonstructural C,N,P exchange h-1 This parameter specifies the maximum fraction of nitrogen that can be recycled upon senescence of plant canopy organs. RCCX Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Maximum fractions for shoot nitrogen recycling 1 This parameter specifies the maximum fraction of phosphorus that can be recycled upon senescence of plant canopy organs. RCCQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Maximum fractions for shoot phosphorus recycling 1 This parameter specifies the minimum fraction of carbon that can be recycled upon senescence of plant canopy organs. RCCZ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Minimum fractions for shoot carbon recycling 1 This parameter specifies the maximum fraction of carbon that can be recycled upon senescence of plant canopy organs. RCCY Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Maximum fractions for shoot carbon recycling 1 This parameter specifies the number of hours required for a plant to initiate senescence after maturity. Hours4SenesAftMature Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Number of hours after physiol maturity required for senescence h This parameter specifies the number of hours required for a plant to initiate storage carbon remobilization after leafout. HourReq2InitSStor4LeafOut Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Number of hours required to initiate remobilization of storage carbon for leafout h First-order rate constant for the release of seasonal storage carbon into the nonstructural carbon pools of the shoot and root during leafout, as the fraction of the storage pool released per hour at 25 degrees Celsius. EcoSIM scales it by a canopy temperature function and by a turgor factor, and takes one value for annual plants and another for perennials. GVMX Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), from the EcoSIM source (PlantBGCPars.F90, PlantBranchMod.F90) for issue #99 EcoSIM declares GVMX in [h]. The code uses it as a fraction per hourly step, so the unit here is h-1. GrosubPars.txt Specific oxidation rate of nonstructural carbon during leafout h-1 This parameter scales the relative sink strength for non-structural carbon and nutrient for growing primary and secondary roots. RTSK Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GrosubPars.txt Relative primary root sink strength 0.25=shallow,4.0=deep root profile 1 This specifies what kind of fertilizer is applied in the model, which could be mineral fertilizer, plant residue, or animal maure. IYTYP Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) FlagDataType.txt Fertilizer release type from fertilizer input file NA This EcoSIM flag parameters specifies what type of disturbances are applied to soil, including tillage, fire, litter removal or drainge. iSoilDisturbType_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) FlagDataType.txt Remove? it provides context in terms of ecosystem management Soil disturbance type NA The Köppen climate zone refers to a region defined by the Köppen climate classification system. KOPPEN KoppenClimZone_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) FlagDataType.txt HWSD2: KOPPEN, the main Köppen-Geiger group only: A tropical, B arid, C temperate, D cold, E polar. it does provide context Köppen climate zone NA This indicator desginates what kind of water table is enforced, which could be natural or artificial, static or mobile. IDWaterTable_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) FlagDataType.txt Remove? it provides context in terms of ecosystem management Water table flag from site file NA Chemical activity of gas Argon. ARSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Gaseous argon diffusivity m2.h-1 Chemical actiivty of aqueous Argon. ARSL ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous argon diffusivity m2.h-1 The rate at which carbon dioxide molecules move through air due to concentration gradients and molecular motion. This parameter controls atmospheric carbon dioxide transport processes and is essential for modeling soil-atmosphere gas exchange, plant respiration fluxes, and greenhouse gas emissions in Earth system models. CGSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Gaseous carbon dioxide diffusivity m2.h-1 The rate at which dissolved carbon dioxide molecules move through aqueous solutions due to concentration gradients and Brownian motion. This parameter controls carbon dioxide transport in soil water and groundwater systems and is essential for modeling soil respiration fluxes and carbon cycling in terrestrial and aquatic environments. CLSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous carbon dioxide diffusivity m2.h-1 The rate at which methane molecules move through air due to concentration gradients and molecular motion. This parameter governs atmospheric methane transport and is critical for modeling methane emissions from soils, wetlands, and other terrestrial sources in greenhouse gas cycling studies. CHSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Gaseous methane diffusivity m2.h-1 The rate at which dissolved methane molecules move through aqueous solutions due to concentration gradients and Brownian motion. This parameter controls methane transport in soil water and sediment pore water and is essential for modeling anaerobic methane production and emission pathways from wetland and aquatic systems. CQSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous methane diffusivity m2.h-1 The rate at which oxygen molecules move through air due to concentration gradients and molecular motion. This parameter governs atmospheric oxygen transport and is fundamental for modeling soil aeration, root respiration, and aerobic decomposition processes in terrestrial ecosystems. OGSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Gaseous oxygen diffusivity m2.h-1 Aqueous diffusivity of dissolved oxygen, it measures the rate at which dissolved O2 migrate or spread through water. OLSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous oxygen diffusivity m2.h-1 The rate at which nitrogen gas molecules move through air due to concentration gradients and molecular motion. This parameter governs atmospheric nitrogen transport and is important for modeling nitrogen fixation processes and the exchange of nitrogen between terrestrial ecosystems and the atmosphere. ZGSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Gaseous nitrogen diffusivity m2.h-1 The rate at which dissolved nitrogen gas molecules move through aqueous solutions due to concentration gradients and Brownian motion. This parameter influences nitrogen transport in soil water and groundwater systems and is important for modeling denitrification processes and nitrogen cycling in waterlogged soils and aquatic environments. ZLSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous nitrogen diffusivity m2.h-1 The rate at which nitrous oxide molecules move through air due to concentration gradients and molecular motion. This parameter is crucial for modeling nitrous oxide emissions from soils and understanding greenhouse gas transport processes and atmospheric nitrous oxide budgets in Earth system models. Z2SG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Gaseous nitrous oxide diffusivity m2.h-1 The rate at which dissolved nitrous oxide molecules move through aqueous solutions due to concentration gradients and Brownian motion. This parameter controls nitrous oxide transport in soil water and is essential for modeling nitrous oxide production and emission pathways from terrestrial and aquatic systems. ZVSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous nitrous oxide diffusivity m2.h-1 The rate at which ammonia molecules move through air due to concentration gradients and molecular motion. This parameter governs atmospheric ammonia transport and is crucial for modeling ammonia emissions from fertilizers and livestock operations, as well as nitrogen deposition and ecosystem eutrophication processes. ZHSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Gaseous ammonia diffusivity m2.h-1 The rate at which dissolved ammonia molecules move through aqueous solutions due to concentration gradients and Brownian motion. This parameter controls ammonia transport in soil water and surface waters and is essential for modeling ammonia volatilization, nitrification processes, and nitrogen cycling in terrestrial and aquatic ecosystems. ZNSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous ammonia diffusivity m2.h-1 The rate at which nitrate ions move through aqueous solutions due to concentration gradients and ionic mobility. This parameter governs nitrate transport in soil water and groundwater systems and is fundamental for modeling nitrate leaching, denitrification processes, and groundwater contamination in agricultural and natural environments. ZOSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous nitrate diffusivity m2.h-1 The rate at which phosphate ions move through aqueous solutions due to concentration gradients and ionic mobility. This parameter controls phosphate transport in soil water and surface waters and is critical for modeling phosphorus cycling, eutrophication processes, and nutrient transport in terrestrial and aquatic ecosystems. POSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous phosphate diffusivity m2.h-1 The rate at which dissolved organic carbon molecules move through aqueous solutions due to concentration gradients and molecular size-dependent mobility. This parameter controls the transport of organic carbon compounds in soil water and surface waters and is essential for modeling carbon cycling, microbial substrate availability, and organic matter decomposition in aquatic environments. OCSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous dissolved organic carbon diffusivity m2.h-1 The rate at which dissolved organic nitrogen molecules move through aqueous solutions due to concentration gradients and molecular mobility characteristics. This parameter governs the transport of organic nitrogen compounds in soil and surface waters and is important for modeling nitrogen mineralization, microbial nitrogen uptake, and organic nitrogen cycling in terrestrial and aquatic systems. ONSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous dissolved organic nitrogen diffusivity m2.h-1 The rate at which dissolved organic phosphorus molecules move through aqueous solutions due to concentration gradients and molecular transport properties. This parameter controls the movement of organic phosphorus compounds in soil water and is crucial for modeling phosphorus mineralization, microbial phosphorus cycling, and organic phosphorus availability in terrestrial ecosystems. OPSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous dissolved organic phosphate diffusivity m2.h-1 The rate at which acetate ions and molecules move through aqueous solutions due to concentration gradients and ionic mobility. This parameter governs the transport of this important organic acid intermediate in soil water and is essential for modeling anaerobic decomposition processes, methanogenesis, and organic matter cycling in waterlogged soils and sediments. OASG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous acetate diffusivity m2.h-1 The rate at which water vapor molecules move through gaseous media due to concentration gradients and molecular kinetic properties. This parameter governs water vapor transport in the atmosphere and soil air spaces and is fundamental for modeling evapotranspiration, soil-atmosphere water exchange, and atmospheric humidity dynamics in Earth system models. WGSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Water vapor diffusivity m2.h-1 The rate at which aluminum ions move through aqueous solutions due to concentration gradients and ionic mobility. This parameter governs aluminum transport in soil water and is essential for modeling soil acidification effects, aluminum toxicity in plant systems, and the movement of aluminum species through terrestrial ecosystems under acidic conditions. ALSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous aluminum diffusivity m2.h-1 The rate at which iron ions move through aqueous solutions due to concentration gradients and redox-dependent ionic mobility. This parameter controls iron transport in soil water and is crucial for modeling iron biogeochemical cycling, iron limitation in ecosystems, and the movement of iron species between different oxidation states in terrestrial and aquatic environments. FESG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous iron diffusivity m2.h-1 The rate at which hydrogen ions move through aqueous solutions due to concentration gradients and extremely high ionic mobility. This parameter controls proton transport in soil water and is fundamental for modeling soil acidification, cation exchange processes, mineral weathering, and the movement of acidity through terrestrial and aquatic systems. HYSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous hydrogen ion diffusivity m2.h-1 The rate at which calcium ions move through aqueous solutions due to concentration gradients and ionic mobility properties. This parameter governs calcium transport in soil water and is essential for modeling nutrient cycling, plant calcium uptake, soil structural development, and calcium carbonate precipitation and dissolution processes in terrestrial systems. CASG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous calcium diffusivity m2.h-1 The rate at which magnesium ions move through aqueous solutions due to concentration gradients and divalent cation mobility characteristics. This parameter controls magnesium transport in soil water and is important for modeling nutrient cycling, plant magnesium uptake, chlorophyll synthesis, and magnesium mineral weathering processes in terrestrial ecosystems. GMSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous magnesium diffusivity m2.h-1 The rate at which sodium ions move through aqueous solutions due to concentration gradients and high ionic mobility. This parameter governs sodium transport in soil water and is essential for modeling soil salinity effects, sodium toxicity in plants, salt accumulation processes, and sodium cycling in arid and irrigated agricultural systems. ANSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous sodium diffusivity m2.h-1 The rate at which potassium ions move through aqueous solutions due to concentration gradients and monovalent cation mobility. This parameter controls potassium transport in soil water and is essential for modeling plant potassium nutrition, fertilizer movement, cation exchange processes, and potassium cycling in agricultural and natural ecosystems. AKSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous potassium diffusivity m2.h-1 The rate at which hydroxide ions move through aqueous solutions due to concentration gradients and high anionic mobility. This parameter governs hydroxide transport in soil water and is crucial for modeling soil alkalinization, pH buffering processes, base neutralization reactions, and the movement of alkalinity through terrestrial and aquatic systems. OHSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous hydroxide diffusivity m2.h-1 The rate at which carbonate ions move through aqueous solutions due to concentration gradients and divalent anion mobility characteristics. This parameter controls carbonate transport in soil water and is fundamental for modeling carbonate mineral precipitation and dissolution, soil pH buffering, and inorganic carbon cycling in terrestrial and aquatic systems. C3SG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous carbonate diffusivity m2.h-1 The rate at which bicarbonate ions move through aqueous solutions due to concentration gradients and anionic mobility properties. This parameter governs bicarbonate transport in soil water and is essential for modeling carbonic acid system dynamics, soil pH buffering, weathering processes, and dissolved inorganic carbon transport in terrestrial ecosystems. HCSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous bicarbonate diffusivity m2.h-1 The rate at which sulfate ions move through aqueous solutions due to concentration gradients and divalent anion mobility characteristics. This parameter controls sulfate transport in soil water and is important for modeling sulfur cycling, acid rain impacts, gypsum mineral dissolution, and sulfate reduction processes in terrestrial and aquatic environments. SOSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous sulfate diffusivity m2.h-1 The rate at which chloride ions move through aqueous solutions due to concentration gradients and high anionic mobility. This parameter governs chloride transport in soil water and is essential for modeling soil salinity, groundwater contamination, de-icing salt impacts, and chloride cycling in coastal and agricultural systems. CLSX ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous chloride diffusivity m2.h-1 The rate at which hydrogen gas molecules move through gaseous media due to concentration gradients and small molecular size-dependent mobility. This parameter controls hydrogen gas transport in soil air spaces and is important for modeling biogeochemical hydrogen production and consumption, soil-atmosphere gas exchange, and hydrogen cycling in terrestrial systems. HGSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Gaseous hydrogen diffusivity m2.h-1 The rate at which dissolved hydrogen gas molecules move through aqueous solutions due to concentration gradients and small molecular size properties. This parameter governs hydrogen gas transport in soil water and is essential for modeling anaerobic biogeochemical processes, hydrogen-based microbial metabolism, and dissolved gas dynamics in terrestrial and aquatic systems. HLSG ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous hydrogen gas diffusivity m2.h-1 The equilibrium partitioning coefficient describing the dissolution of argon gas into aqueous solutions under standard temperature and pressure conditions. This parameter quantifies the maximum amount of argon that can dissolve in water and is important for modeling inert gas tracers and soil-atmosphere gas exchange processes in environmental studies. SARX ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Argon solubility coefficient at standard ambient temperature g{solute}.g-1{gas} The equilibrium partitioning coefficient describing the dissolution of carbon dioxide gas into aqueous solutions under standard temperature and pressure conditions. This parameter determines carbon dioxide concentrations in soil water and is fundamental for modeling carbonic acid formation, soil pH dynamics, and carbon cycling in terrestrial ecosystems. SCO2X ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Carbon dioxide solubility coefficient at standard ambient temperature g{solute}.g-1{gas} The equilibrium partitioning coefficient describing the dissolution of methane gas into aqueous solutions under standard temperature and pressure conditions. This parameter controls methane concentrations in soil water and groundwater and is essential for modeling methane transport and emissions from anaerobic environments in terrestrial and aquatic systems. SCH4X ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Methane solubility coefficient at standard ambient temperature g{solute}.g-1{gas} The equilibrium partitioning coefficient describing the dissolution of oxygen gas into aqueous solutions under standard temperature and pressure conditions. This parameter determines dissolved oxygen concentrations in soil water and is crucial for modeling aerobic respiration, microbial activity, and redox conditions in terrestrial and aquatic environments. SOXYX ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Oxygen solubility coefficient at standard ambient temperature g{solute}.g-1{gas} The equilibrium partitioning coefficient describing the dissolution of nitrogen gas into aqueous solutions under standard temperature and pressure conditions. This parameter determines dissolved nitrogen concentrations in soil water and is important for modeling inert gas tracers, denitrification potential assessment, and soil-atmosphere gas exchange processes in terrestrial systems. SN2GX ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Nitrogen solubility coefficient at standard ambient temperature g{solute}.g-1{gas} The equilibrium partitioning coefficient describing the dissolution of nitrous oxide gas into aqueous solutions under standard temperature and pressure conditions. This parameter controls nitrous oxide concentrations in soil water and is essential for modeling greenhouse gas emissions, denitrification processes, and nitrous oxide transport in terrestrial ecosystems. SN2OX ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Nitrous oxide solubility coefficient at standard ambient temperature g{solute}.g-1{gas} The equilibrium partitioning coefficient describing the dissolution of ammonia gas into aqueous solutions under standard temperature and pressure conditions. This parameter determines ammonia concentrations in soil water and is crucial for modeling ammonia volatilization, nitrogen loss from agricultural systems, and ammonia transport between soil and atmosphere. SNH3X ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Ammonia solubility coefficient at standard ambient temperature g{solute}.g-1{gas} The equilibrium partitioning coefficient describing the dissolution of hydrogen gas into aqueous solutions under standard temperature and pressure conditions. This parameter controls dissolved hydrogen concentrations in soil water and is important for modeling hydrogen-based microbial metabolism, biogeochemical hydrogen cycling, and soil-atmosphere hydrogen exchange processes. SH2GX ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Hydrogen solubility coefficient at standard ambient temperature g{solute}.g-1{gas} A measure of water’s resistance to flow or, more precisely, the internal friction between its molecules when it moves. It quantifies how much force is needed to make water flow at a certain rate. VISCW ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Water viscosity Mg.m-1.s-1 The cumulative mass of hydrogen gas stored across all soil layers and spatial grid cells in a modeling domain. This integrated measure reflects the balance between hydrogen production from fermentation processes and hydrogen consumption by methanogenic bacteria and is used for mass conservation verification in biogeochemical models. TSoilH2G_lnd Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt What is the "d-2" unit in all the below terms? Implies this is not actually mass, but some kind of ratio. Total soil hydrogen gas g/{grid} The cumulative mass flux of all gaseous compounds emitted from soil surfaces across a modeling domain. This integrated measure includes emissions of carbon dioxide, methane, nitrous oxide, and other trace gases and is essential for quantifying soil-atmosphere gas exchange and verifying mass conservation in biogeochemical models. SurfGas_lnd Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total soil gas emission g/{grid} The cumulative mass of essential chemical elements stored in plant biomass across a modeling domain. This integrated measure includes carbon, nitrogen, phosphorus, and other nutrients in plant tissues and is crucial for verifying mass conservation and understanding ecosystem nutrient cycling in terrestrial biogeochemical models. PlantElemntStoreLandscape Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total plant element balance g/{grid} The total mass of hydrogen gas lost from a modeling domain through groundwater flow and lateral transport processes. This integrated flux represents hydrogen removal via subsurface water movement and is essential for maintaining mass conservation in biogeochemical models of hydrogen cycling in terrestrial systems. H2GOU Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Cumulative hydrogen gas loss through lateral and lower boundaries g/{grid} The cumulative quantity of all dissolved ionic species stored in soil water across a modeling domain. This integrated measure includes essential plant nutrients such as nitrogen, phosphorus, and potassium ions as well as other dissolved species and is fundamental for assessing soil fertility and verifying mass conservation in terrestrial biogeochemical models. TION Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt The total over the modelled domain of Soil column ion content (BERVO:0000916), the per-grid-cell value. EcoSIM resets TION each hour and adds to it the ion content of every grid cell's soil column, in RedistMod.F90, and of every snowpack, in SnowTransportMod.F90 (issue #109). Total soil ion content mol/{grid} The cumulative flux of dissolved ionic species entering a modeling domain through surface water inputs. This integrated measure includes ion inputs from precipitation, irrigation, and surface runoff and is essential for tracking nutrient inputs and maintaining mass conservation in terrestrial biogeochemical models. TIONIN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total surface ion flux mol/{grid} The cumulative flux of dissolved ionic species lost from a modeling domain through subsurface water movement. This integrated measure includes both downward leaching through soil profiles and lateral groundwater flow and is crucial for understanding nutrient losses and maintaining mass conservation in terrestrial biogeochemical models. TIONOU Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total subsurface ion flux mol/{grid} The cumulative mass of particulate matter and sediment stored across all soil layers in a modeling domain. This integrated measure represents the total sediment pool including eroded material and suspended particles and is essential for verifying mass conservation in erosion and sediment transport models. TSEDSO Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total soil sediment Mg/{grid} The cumulative flux of particulate matter lost from a modeling domain through subsurface transport processes. This integrated measure includes sediment removal via groundwater flow and subsurface erosion and is important for understanding soil loss and maintaining mass conservation in erosion and sediment transport models. TSedmErossLoss_lnds Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total sediment subsurface flux Mg/{grid} The cumulative volume of water stored across all soil layers in a modeling domain. This integrated measure represents the total water pool available for plant uptake and biogeochemical processes and is fundamental for understanding hydrological cycles and verifying water mass conservation in terrestrial ecosystem models. WatMassStore_lnd Changed "water content" to "volume" of "water" Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total soil water content m3/{grid} The cumulative thermal energy stored across all soil layers in a modeling domain. This integrated measure represents the total heat pool affecting soil temperature dynamics and biogeochemical reaction rates and is essential for verifying energy conservation in terrestrial ecosystem models. HeatStore_lnd Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total soil heat content MJ/{grid} The cumulative mass of oxygen stored in gaseous and dissolved forms across all soil layers in a modeling domain. This integrated measure represents the total oxygen pool available for aerobic respiration and biogeochemical processes and is crucial for verifying mass conservation in soil biogeochemical models. TSoilO2G_lnd Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Since "g" this is mass not volume. Still unclear what d-2 is. Total soil oxygen content g/{grid} The cumulative mass of litter-derived organic matter across all soil layers in a modeling domain. This integrated measure represents decomposing plant and microbial residues at various stages of breakdown and is essential for understanding carbon cycling and verifying organic matter mass conservation in terrestrial ecosystem models. LitRMStoreLndscap Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt OK to be measured in soil and litter? Total soil litter organic matter content g/{grid} The cumulative mass of microbially-derived organic compounds including particulate organic matter and humus across all soil layers in a modeling domain. This integrated measure represents stable and semi-stable carbon pools formed through microbial decomposition processes and is crucial for understanding long-term carbon storage and verifying mass conservation in soil biogeochemical models. POMHumStoreLndscap Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total soil particulate organic matter + humus carbon content g/{grid} The cumulative mass of ammonium in dissolved and adsorbed forms across all soil layers in a modeling domain. This integrated measure represents the total ammonium pool available for plant uptake and microbial nitrification and is essential for understanding nitrogen cycling and verifying mass conservation in terrestrial biogeochemical models. TDisolNH4_lnd Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total soil ammonium content g/{grid} The cumulative mass of nitrate dissolved in soil water across all soil layers in a modeling domain. This integrated measure represents the total nitrate pool available for plant uptake and denitrification processes and is crucial for understanding nitrogen cycling and verifying mass conservation in terrestrial biogeochemical models. tNO3_lnd Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total soil nitrate content g/{grid} The cumulative mass of phosphate ions stored across all soil layers in a modeling domain. This integrated measure represents the total phosphate pool essential for plant energy metabolism and nucleic acid synthesis and is fundamental for understanding phosphorus cycling and verifying mass conservation in terrestrial biogeochemical models. TDisolPi_lnd Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total soil phosphate content g/{grid} The sum of all forms of precipitation, including rain, snow, sleet, and hail, over a certain period. It is a crucial element of the Earth’s water cycle, and its measurement is critical for meteorology, hydrology, and climatology. Notably, total precipitation enables the quantification of water resources and facilitates the understanding of weather patterns and climate change. CRAIN_lnd "precipitation" is key context Check for consensus on this Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total precipitation m3/{grid} The cumulative energy flux at the soil-atmosphere interface from latent heat, sensible heat, precipitation, irrigation, and litter inputs across a modeling domain. This integrated measure represents the total energy input to terrestrial systems and is essential for verifying energy conservation in land surface models. HEATIN_lnd Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total surface heat flux MJ/{grid} The cumulative mass of organic carbon added to soils through manure and organic fertilizer applications across a modeling domain. This integrated measure represents carbon inputs from agricultural management practices and is crucial for verifying mass conservation in agricultural soil biogeochemical models. tAmendOrgC_lnd "amendment" has to go somewhere Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Is "fertilizer" equivalent to "amendment"? Total organic carbon amendment g/{grid} The cumulative mass of organic nitrogen added to soils through manure and organic fertilizer applications across a modeling domain. This integrated measure represents nitrogen inputs from agricultural management practices and is essential for understanding nitrogen cycling and verifying mass conservation in agricultural soil biogeochemical models. TORGN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total organic nitrogen amendment g/{grid} The cumulative mass of organic phosphorus added to soils through manure and organic fertilizer applications across a modeling domain. This integrated measure represents phosphorus inputs from agricultural management practices and is fundamental for understanding phosphorus cycling and verifying mass conservation in agricultural soil biogeochemical models. TORGP Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total organic phosphorus amendment g/{grid} The cumulative volume of water lost from a modeling domain through subsurface flow processes including groundwater drainage and lateral flow. This integrated measure represents water losses below the surface and is essential for understanding hydrological cycles and verifying water mass conservation in terrestrial ecosystem models. QH2OLoss_lnds Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total subsurface water flux m3/{grid} The cumulative volume of water lost from a modeling domain through evaporation from soil surfaces and plant transpiration processes. This integrated measure represents the primary water loss mechanism in terrestrial systems and is fundamental for understanding hydrological cycles and water balance in Earth system models. CEVAP Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total evaporation m3/{grid} The cumulative volume of water flowing over land surfaces without infiltrating into soil across a modeling domain. This integrated measure represents water transport from terrestrial systems to streams and rivers and is crucial for understanding hydrological cycles and water resource availability in Earth system models. CRUN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total surface runoff m3/{grid} The cumulative energy flux lost from a modeling domain through subsurface water movement and drainage processes. This integrated measure represents thermal energy transport below the surface and is essential for verifying energy conservation in terrestrial ecosystem models. HeatOut_lnds Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total subsurface heat flux MJ/{grid} The cumulative mass of dissolved oxygen lost from a modeling domain through subsurface water movement and drainage processes. This integrated measure represents oxygen transport below the surface and is important for verifying mass conservation and understanding redox conditions in terrestrial biogeochemical models. OXYGOU Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total subsurface oxygen flux g/{grid} The cumulative mass of dissolved organic carbon lost from a modeling domain through subsurface water movement and drainage processes. This integrated measure represents carbon transport below the surface and is crucial for understanding carbon cycling and verifying mass conservation in terrestrial biogeochemical models. TOMOU_lnds Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total subsurface carbon flux g/{grid} The cumulative mass of dissolved inorganic nitrogen entering a modeling domain through surface water inputs including precipitation and runoff. This integrated measure represents nitrogen inputs to terrestrial systems and is essential for understanding nitrogen cycling and verifying mass conservation in biogeochemical models. TZIN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total surface nitrogen flux g/{grid} The cumulative mass of dissolved inorganic phosphorus entering a modeling domain through surface water inputs including precipitation and runoff. This integrated measure represents phosphorus inputs to terrestrial systems and is fundamental for understanding phosphorus cycling and verifying mass conservation in biogeochemical models. TPIN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total surface phosphous flux g/{grid} The cumulative mass of carbon dioxide stored in soil air spaces across all soil layers in a modeling domain. This integrated measure represents the carbon dioxide pool produced by root and microbial respiration and is essential for understanding soil carbon cycling and verifying mass conservation in biogeochemical models. TGasC_lnd Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total soil carbon dioxide g/{grid} The cumulative mass of nitrogen gas stored in soil air spaces across all soil layers in a modeling domain. This integrated measure represents the nitrogen gas pool produced by denitrification processes and is important for understanding nitrogen cycling and verifying mass conservation in soil biogeochemical models. TGasN_lnd Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimSumDataType.txt Total soil nitrogen g/{grid} The rate of carbon dioxide release from plant canopy tissues due to metabolic processes required for cellular maintenance and growth. This flux represents the energy cost of maintaining living canopy biomass and synthesizing new tissue and is essential for modeling plant carbon budgets in terrestrial ecosystem models. CanopyGrosRCO2_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Canopy autotrophic respiration g{C}.h-1/{grid} The net flux of carbon dioxide between an ecosystem and the atmosphere representing the balance between photosynthetic carbon uptake and respiratory carbon release. This integrated measure includes carbon dioxide uptake by plants through photosynthesis minus carbon dioxide release from plant and soil respiration and is fundamental for assessing ecosystem carbon balance in terrestrial models. Eco_NEE_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Net ecosystem carbon dioxide exchange g.h-1/{grid} The rate of ammonia capture by plant canopy surfaces through dry deposition from the atmosphere. This flux represents atmospheric ammonia inputs to terrestrial ecosystems that are subsequently transferred to soil through litterfall and is important for modeling nitrogen cycling and atmospheric nitrogen deposition effects. NH3Dep2Can_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Canopy ammonia flux g.h-1/{grid} The initial biomass of root nodule structures established during bacterial infection and colonization events in nitrogen-fixing plants. This measure represents the carbon, nitrogen, and phosphorus content of newly formed symbiotic structures and is essential for modeling biological nitrogen fixation initiation in terrestrial ecosystem models. NodulInfectElms_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Pft nodule infection g.h-1/{grid} The cumulative biomass of root nodule structures accumulated over the entire growing season of nitrogen-fixing plants. This integrated measure represents the total carbon, nitrogen, and phosphorus invested in symbiotic structures and is important for understanding the energetic costs of biological nitrogen fixation in terrestrial ecosystem models. NodulInfectElmsCum_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Pft cumulative nodule infection g/{grid} The cumulative flux of ammonia captured by plant canopy surfaces through atmospheric deposition over an annual cycle. This integrated measure represents total atmospheric ammonia inputs to plant tissues and is essential for understanding nitrogen inputs and verifying mass conservation in terrestrial ecosystem models. NH3Emis_CumYr_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total canopy ammonia flux g/{grid} The cumulative mass of plant litterfall containing carbon, nitrogen, and phosphorus deposited on soil surfaces over an annual cycle. This integrated measure represents organic matter inputs from plant senescence and is crucial for understanding decomposition processes and verifying mass conservation in terrestrial ecosystem models. SurfLitrfalStrutElms_CumYr_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total surface litterfall element g/{grid} The net flux of dissolved organic carbon between plant roots and soil with positive values indicating root uptake and negative values indicating root exudation. This bidirectional process represents carbon exchange between plants and soil organic matter pools and is fundamental for understanding rhizosphere carbon dynamics in terrestrial ecosystem models. RootMycoExudEUptk_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Root uptake (+ve) - exudation (-ve) of dissolved organic carbon g.h-1/{grid} The rate of ammonium absorption by plant roots from non-fertilized soil areas excluding banded fertilizer zones. This process represents nutrient acquisition from background soil solution and is essential for modeling plant nitrogen nutrition and competition in terrestrial ecosystem models. RootNutUptake_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Root uptake of ammonium non-band g.h-1/{grid} The rate of atmospheric nitrogen conversion to ammonia by symbiotic bacteria in root nodules of nitrogen-fixing plants. This biological process represents an important nitrogen input to terrestrial ecosystems and is crucial for modeling nitrogen cycling and plant nutrition in nutrient-limited environments. RootN2Fix_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Root nitrogen fixation g{N}.h-1/{grid} The cumulative rate of atmospheric nitrogen fixation by all nitrogen-fixing plants summed across all vertical soil layers. This vertically integrated measure represents the total biological nitrogen input to soil profiles and is important for understanding nitrogen cycling in terrestrial ecosystem models. RootN2Fix_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Vertical profile of root nitrogen fixation g{N}.h-1/{grid} The rate of dissolved gas exchange between plant roots and soil water including nitrogen, oxygen, argon, carbon dioxide, methane, ammonia and hydrogen. This process represents root-mediated gas transport through plant tissues and is important for modeling soil-atmosphere gas exchange and root metabolism in terrestrial systems. RootUptkSoiSol_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Aqueous gas flux from roots to soil water g.h-1/{grid} The rate of dihydrogen phosphate absorption by plant roots from non-fertilized soil areas excluding banded fertilizer zones. This process represents phosphorus acquisition from background soil solution and is essential for modeling plant phosphorus nutrition and competition in terrestrial ecosystem models. RootH2PO4DmndSoil_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Root uptake of dihydrogen phosphate non-band g.h-1/{grid} The rate of dihydrogen phosphate absorption by plant roots from fertilizer band zones with concentrated nutrient availability. This process represents enhanced phosphorus acquisition from localized fertilizer applications and is crucial for modeling agricultural management effects on plant nutrition in terrestrial ecosystem models. RootH2PO4DmndBand_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Root uptake of dihydrogen phosphate band g.h-1/{grid} The rate of hydrogen phosphate absorption by plant roots from non-fertilized soil areas excluding banded fertilizer zones. This process represents phosphorus acquisition from background soil solution at higher pH conditions and is essential for modeling plant phosphorus nutrition under varying soil chemical conditions. RootH1PO4DmndSoil_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Hydrogen phosphate demand in non-band by each root population g.h-1/{grid} The rate of hydrogen phosphate absorption by plant roots from fertilizer band zones with concentrated nutrient availability. This process represents enhanced phosphorus acquisition from localized fertilizer applications at higher pH conditions and is crucial for modeling agricultural management effects on plant phosphorus nutrition. RootH1PO4DmndBand_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Hydrogen phosphate demand in band by each root population g.h-1/{grid} Element translocated from leaf during senescence, often represented as RCELX, refers to the movement of certain nutrients or elements from the leaf to other parts of the plant during the process of senescence, which is the aging process in the plant where the leaf cellular structure degrades, often leading to leaf fall. This translocation typically happens to reuse or relocate valuable elements within the plant for normative growth or survival purposes. LeafElmntRemobFlx_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Element translocated from leaf during senescence g.h-1/{grid} Element translocated from sheath during senescence refers to the process of nutrients being moved away from the sheath during plant senescence. Senescence is the last phase of development in a plant's lifecycle, characterized by degradation of cell structures, protein catabolism, and nutrient mobilization. PetioleChemElmRemobFlx_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Element translocated from sheath during senescence g.h-1/{grid} The rate of atmospheric carbon dioxide conversion to organic carbon compounds through photosynthesis by plant communities. This process represents the total carbon assimilation before accounting for respiratory losses and is fundamental for understanding primary productivity and carbon sequestration potential in terrestrial ecosystem models. GrossCO2Fix_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total gross carbon dioxide fixation g.h-1/{grid} The cumulative amount of atmospheric carbon dioxide converted to organic carbon compounds through photosynthesis over an annual cycle. This integrated measure represents the total carbon assimilation by plant communities and is essential for understanding annual primary productivity in terrestrial ecosystem models. GrossCO2Fix_CumYr_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Cumulative total gross carbon dioxide fixation g/{grid} The mass of carbon, nitrogen, and phosphorus contained in structural plant tissues that become litterfall during senescence events. This measure represents the nutrient content of woody and supportive tissues entering the decomposition cycle and is important for modeling organic matter inputs to soil in terrestrial ecosystem models. LitrfalStrutElms_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total structural plant element in litterfall g/{grid} The cumulative amount of atmospheric nitrogen converted to ammonia by symbiotic bacteria in both canopy and root tissues over an annual cycle. This integrated measure represents the total biological nitrogen input by nitrogen-fixing plants and is crucial for understanding nitrogen cycling in terrestrial ecosystem models. PlantN2Fix_CumYr_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total plant nitrogen fixation g/{grid} The cumulative amount of carbon dioxide released from plant tissues through autotrophic respiration for maintenance and growth processes over an annual cycle. This integrated measure represents the total respiratory carbon losses by plant communities and is essential for understanding net primary productivity in terrestrial ecosystem models. GrossRespC_CumYr_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Cumulative total plant respiration g/{grid} The instantaneous rate of carbon dioxide release from plant tissues through autotrophic respiration for maintenance and growth processes. This flux represents the metabolic carbon costs of plant function and is fundamental for modeling plant carbon budgets and net carbon assimilation in terrestrial ecosystem models. GrossResp_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Pft level plant respiration g.h-1/{grid} Plant element balance refers to the equilibrium between the input and output of essential elements within the plant system. It describes the processes of absorption, translocation, utilization, and accumulation of nutrients such as carbon, oxygen, hydrogen, nitrogen, phosphorus, and potassium by plants. This balance is crucial for the growth, development, and overall health of plants, as it directly impacts their physiological functions and metabolic processes. Understanding and modeling plant element balance is essential for studying plant responses to environmental changes and optimizing agricultural practices and productivity. ElmBalanceCum_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Plant element balance g/{grid} The cumulative mass of carbon, nitrogen, and phosphorus contained in plant litterfall from senescent tissues over an annual cycle. This integrated measure represents the annual nutrient inputs to soil from plant mortality and is essential for understanding organic matter cycling in terrestrial ecosystem models. LitrfalStrutElms_CumYr_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Plant element litterfall g.h-1/{grid} The rate of carbon, nitrogen, and phosphorus transfer from dying root tissues to soil organic matter pools during root mortality events. This process represents belowground organic matter inputs from root death and is important for modeling soil organic matter dynamics in terrestrial ecosystem models. LitrfalStrutElms_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Plant litterfall element g.h-1/{grid} The net rate of carbon accumulation by primary producers after accounting for respiratory losses representing energy available for higher trophic levels. This measure quantifies ecosystem productivity by subtracting autotrophic respiration from gross primary productivity and is fundamental for understanding carbon flow in terrestrial ecosystem models. NetPrimProduct_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total net primary productivity g{C}.h-1/{grid} The cumulative volume of water lost from plant canopy surfaces through evaporation and transpiration processes over an annual cycle. This integrated measure represents the plant contribution to ecosystem evapotranspiration and is essential for understanding water cycling and plant water use efficiency in terrestrial ecosystem models. ETCanopy_CumYr_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total transpiration <0 into atmosphere m/{grid} The cumulative amount of carbon dioxide released from aboveground plant organs through autotrophic respiration processes over an annual cycle. This integrated measure represents the total respiratory carbon losses from canopy tissues and is crucial for understanding plant carbon budgets in terrestrial ecosystem models. CanopyRespC_CumYr_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total autotrophic respiration g/{grid} The cumulative mass of carbon, nitrogen, and phosphorus removed from ecosystems through agricultural harvest of plant materials over an annual cycle. This measure represents nutrient exports from terrestrial systems through crop production and is important for understanding agricultural impacts on biogeochemical cycling in Earth system models. EcoHavstElmnt_CumYr_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Plant element harvest g/{grid} The total biomass removed from ecosystems through complete plant harvesting representing the entire above and belowground plant material collected. This measure quantifies the total organic matter export from terrestrial systems through agricultural practices and is essential for modeling human impacts on ecosystem carbon and nutrient cycles. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total plant harvest g/{grid} The cumulative amount of carbon dioxide released to the atmosphere through combustion of plant biomass during fire events over an annual cycle. This measure represents the return of sequestered carbon to the atmosphere through wildfire disturbances and is crucial for understanding fire impacts on carbon cycling in Earth system models. CO2ByFire_CumYr_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Plant carbon dioxide emission from fire g/{grid} The cumulative amount of methane released to the atmosphere through incomplete combustion of plant biomass during fire events over an annual cycle. This greenhouse gas emission represents a significant contributor to atmospheric methane from wildfire disturbances and is important for modeling fire impacts on greenhouse gas cycling in Earth system models. CH4ByFire_CumYr_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt What's being measured here is "mass" (of methane); where does "emission" go? Maybe "Emission" and "uptake" are the correct attributes but they're measured in mass or volume units. Plant methane emission from fire g/{grid} The cumulative amount of oxygen consumed from the atmosphere during combustion of plant biomass in fire events over an annual cycle. This oxygen consumption represents the oxidant requirement for biomass burning and is essential for understanding fire stoichiometry and atmospheric oxygen depletion during wildfire disturbances. O2ByFire_CumYr_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Plant oxygen uptake from fire g/{grid} The cumulative amount of ammonia released to the atmosphere through volatilization of nitrogen compounds during plant biomass burning over an annual cycle. This nitrogen emission represents a significant pathway for ecosystem nitrogen loss during fire disturbances and is important for modeling fire impacts on nitrogen cycling in terrestrial systems. NH3byFire_CumYr_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Plant ammonia emission from fire g/{grid} The cumulative amount of nitrous oxide released to the atmosphere through oxidation of nitrogen compounds during plant biomass burning over an annual cycle. This greenhouse gas emission represents a significant contributor to atmospheric nitrous oxide from wildfire disturbances and is crucial for modeling fire impacts on climate and nitrogen cycling in Earth system models. N2ObyFire_CumYr_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Plant nitrous oxide emission from fire g/{grid} The cumulative amount of phosphate released to the atmosphere and soil through combustion of plant biomass during fire events over an annual cycle. This phosphorus emission represents nutrient mobilization from organic matter during wildfire disturbances and is important for understanding fire impacts on phosphorus cycling in terrestrial ecosystems. PO4byFire_CumYr_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Plant phosphate emission from fire g/{grid} The rate of oxygen consumption by plant root tissues for autotrophic respiration processes in each soil layer. This oxygen demand represents the metabolic requirement for root maintenance and growth and is essential for modeling belowground plant metabolism and soil oxygen dynamics in terrestrial ecosystem models. RootO2Dmnd4Resp_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Root oxygen demand from respiration g.h-1/{grid} The rate of gaseous compound transport through plant root tissues facilitating exchange between soil and atmosphere. This root-mediated gas transport includes carbon dioxide, oxygen, and other trace gases and is fundamental for understanding soil-atmosphere gas exchange and plant influences on biogeochemical cycling in terrestrial ecosystem models. trcg_air2root_flx_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Gaseous tracer flux through roots g.h-1/{grid} The net flux of gaseous compounds between dissolved and gaseous phases within plant root systems with positive values indicating gas dissolution and negative values indicating volatilization. This bidirectional process controls gas partitioning in root tissues and is important for modeling plant-mediated gas transport and root metabolism in terrestrial ecosystem models. trcg_Root_gas2aqu_flx_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Dissolution (+ve) - volatilization (-ve) gas flux in roots g.h-1/{grid} The rate of carbon dioxide release from root autotrophic respiration into root water and surrounding soil solution. This dissolved carbon dioxide flux represents respiratory carbon production in root tissues and is essential for modeling soil carbonic acid formation and root zone pH dynamics in terrestrial ecosystem models. RCO2Emis2Root_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Aqueous carbon dioxide flux from roots to root water g.h-1/{grid} The rate of dissolved oxygen uptake by plant root tissues from internal root water for autotrophic respiration processes. This oxygen flux can originate from aerenchyma transport or diffusion from soil water and is crucial for modeling root metabolism and soil oxygen dynamics in terrestrial ecosystem models. RootO2Uptk_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Aqueous oxygen flux from roots to root water g.h-1/{grid} The potential rate of root autotrophic respiration under optimal oxygen conditions without oxygen limitation constraints. This maximum respiratory capacity represents the intrinsic metabolic potential of root tissues and is important for modeling root metabolism under varying soil oxygen conditions in terrestrial ecosystem models. RootRespPotent_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Root respiration unconstrained by oxygen gas g.h-1/{grid} The actual rate of carbon dioxide release from root autotrophic respiration limited by available soil oxygen concentrations. This oxygen-constrained respiration provides energy for root maintenance, nutrient uptake, and growth and is essential for modeling root metabolism under varying soil redox conditions in terrestrial ecosystem models. RootCO2Autor_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Root respiration constrained by oxygen gas g.h-1/{grid} The net flux of dissolved elements between plant roots and soil solution with positive values indicating root uptake and negative values indicating root exudation. This bidirectional nutrient exchange represents plant nutrient acquisition strategies and root carbon investment and is fundamental for understanding rhizosphere biogeochemistry in terrestrial ecosystem models. RootMycoExudElms_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root uptake (+ve) - exudation (-ve) of dissolved element g.h-1/{grid} The cumulative rate of ammonium absorption by plant roots from soil solution across all soil layers and plant populations. This nitrogen uptake process represents a major plant nutrient acquisition pathway and is essential for modeling plant nitrogen nutrition and soil nitrogen cycling in terrestrial ecosystem models. RootNH4Uptake_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root uptake of ammonium g.h-1/{grid} The cumulative rate of nitrate absorption by plant roots from soil solution across all soil layers and plant populations. This nitrogen uptake process represents an important plant nutrient acquisition pathway under well-aerated soil conditions and is crucial for modeling plant nitrogen nutrition and soil nitrogen cycling in terrestrial ecosystem models. RootNO3Uptake_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root uptake of nitrate g.h-1/{grid} The cumulative rate of dihydrogen phosphate absorption by plant roots from soil solution across all soil layers and plant populations. This phosphorus uptake process is vital for plant energy metabolism, photosynthesis, and nucleic acid synthesis and is fundamental for modeling plant phosphorus nutrition and soil phosphorus cycling in terrestrial ecosystem models. RootH2PO4Uptake_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root uptake of phosphate g.h-1/{grid} The cumulative rate of hydrogen phosphate absorption by plant roots from soil solution across all soil layers and plant populations. This phosphorus uptake process occurs under higher soil pH conditions and is important for plant energy metabolism and nucleic acid synthesis in terrestrial ecosystem models. RootHPO4Uptake_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root uptake of hydrogen phosphate g.h-1/{grid} The cumulative rate of atmospheric nitrogen conversion to ammonia by symbiotic bacteria in root nodules across all soil layers for a plant population. This biological nitrogen fixation represents an important nitrogen input to terrestrial ecosystems and is crucial for modeling nitrogen cycling and plant nutrition in nutrient-limited environments. RootN2Fix_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root nitrogen fixation g.h-1/{grid} The rate of gaseous compound release from plant root tissues during disturbance events including nitrogen, oxygen, argon, carbon dioxide, methane, nitrous oxide, ammonia and hydrogen. This disturbance-induced gas flux represents ecosystem gas losses during root destruction and is important for modeling disturbance impacts on soil-atmosphere gas exchange. RootGasLossDisturb_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Gas flux from root disturbance (<0 into atmosphere) g.h-1/{grid} The potential rate of nutrient absorption by plant roots from non-fertilized soil areas under optimal oxygen conditions without oxygen limitation constraints. This maximum uptake capacity includes ammonium, nitrate, and phosphate forms and is important for modeling plant nutrient acquisition potential under varying soil oxygen conditions. RootOUlmNutUptake_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Root uptake of ammonium non-band unconstrained by oxygen gas g.h-1/{grid} The potential rate of nutrient absorption by plant roots from non-fertilized soil areas under optimal carbon availability without metabolic carbon limitation constraints. This maximum uptake capacity includes ammonium, nitrate, and phosphate forms and is important for modeling plant nutrient acquisition potential under varying carbon resource conditions. RootCUlmNutUptake_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Root uptake of ammonium non-band unconstrained by root nonstructural C g.h-1/{grid} The potential rate of carbon dioxide release from root autotrophic respiration under optimal carbon availability without metabolic carbon limitation constraints. This maximum respiratory capacity represents the intrinsic metabolic potential before considering gas transport limitations and is important for modeling root metabolism under varying carbon resource conditions. RootCO2EmisPot_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Root carbon dioxide efflux unconstrained by root nonstructural C g.h-1/{grid} The demand rate for ammonium absorption by plant roots from non-fertilized soil areas to support root biomass synthesis and growth. This nitrogen demand represents the plant requirement for ammonium under unlimited soil ammonium availability and is essential for modeling plant nitrogen acquisition strategies in terrestrial ecosystem models. RootNH4DmndSoil_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Root uptake of ammonium non-band unconstrained by ammonium g.h-1/{grid} The demand rate for nitrate absorption by plant roots from non-fertilized soil areas to support root biomass synthesis and growth. This nitrogen demand represents the plant requirement for nitrate under unlimited soil nitrate availability and is essential for modeling plant nitrogen acquisition strategies in terrestrial ecosystem models. RootNO3DmndSoil_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Root uptake of ammonium band unconstrained by ammonium g.h-1/{grid} The demand rate for ammonium absorption by plant roots from fertilizer band zones to support root biomass synthesis and growth. This nitrogen demand represents enhanced plant nutrient acquisition from localized fertilizer applications and is crucial for modeling agricultural management effects on plant nutrition in terrestrial ecosystem models. RootNH4DmndBand_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Root uptake of nitrate band unconstrained by nitrate g.h-1/{grid} The demand rate for nitrate absorption by plant roots from fertilizer band zones to support root biomass synthesis and growth. This nitrogen demand represents enhanced plant nutrient acquisition from localized fertilizer applications and is crucial for modeling agricultural management effects on plant nutrition in terrestrial ecosystem models. RootNO3DmndBand_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Root uptake of nitrate non-band unconstrained by nitrate g.h-1/{grid} The rate of ammonia capture by individual plant branches through atmospheric dry deposition processes. This branch-level ammonia flux is scaled up to estimate whole-canopy ammonia interception and represents atmospheric nitrogen inputs to plant tissues in terrestrial ecosystem models. NH3Dep2Can_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Gaseous ammonia flux from root disturbance band g.h-1/{grid} The limiting effect of soil oxygen concentration on plant root respiration rates in waterlogged or poorly drained soils. This constraint represents how anaerobic conditions reduce root metabolic activity and is critical for modeling plant responses to soil moisture extremes in terrestrial ecosystem models. RAutoRootO2Limter_rpvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Oxygen constraint to root respiration 1 The net flux of chemical elements between plant roots and soil, accounting for both nutrient uptake and organic compound exudation by plant functional types. This bidirectional exchange represents the balance between plant nutrient acquisition and root carbon losses that drive soil biogeochemical processes in terrestrial ecosystem models. PlantRootSoilElmNetX_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Net root element uptake (+ve) - exudation (-ve) g.h-1/{grid} The annual cumulative release of organic carbon, nitrogen, and phosphorus compounds from plant roots into surrounding soil through exudation processes. This root exudation follows concentration gradients between dissolved organic matter in soil and root tissues and represents an important carbon and nutrient input to soil biogeochemical cycles. PlantExudElm_CumYr_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total net root element uptake (+ve) - exudation (-ve) g/{grid} The annual cumulative nitrogen uptake by plant functional types through root absorption to support biomass synthesis and growth. Plant functional types are groups of plant species with similar ecological characteristics and resource requirements, and this nitrogen uptake measurement is essential for modeling plant productivity and nitrogen cycling in terrestrial ecosystems. RootUptk_N_CumYr_pft "Cumulative" is more specific than "tottal" (as above). Still unclear on uptake/emission. What is Pft? Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Pft cumulative nitrogen uptake g/{grid} The annual cumulative phosphorus uptake by plant functional types through root absorption to support biomass synthesis and growth. This phosphorus uptake measurement is essential for modeling plant productivity and phosphorus cycling in terrestrial ecosystems where phosphorus availability often limits plant growth. RootUptk_P_CumYr_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Pft cumulative phosphorus uptake g/{grid} The vertically integrated water flux from soil to plant roots to support transpiration and maintain plant water balance. This total root water uptake represents the plant demand for soil water and is fundamental for modeling plant-soil water interactions in terrestrial ecosystem models. TPlantRootH2OUptake_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root water uptake m3.h-1/{grid} The layer-specific water flux from soil to plant roots across the vertical soil profile during the current model time step. This depth-resolved water uptake pattern reflects root distribution and soil water availability and is essential for modeling plant water acquisition strategies in terrestrial ecosystem models. TWaterPlantRoot2Soil_vr subsurface_ecosim_water_source ATS: subsurface_ecosim_water_source, the per-layer subsurface water source returned to ATS by the EcoSIM PK, computed as the sum over plant functional types of EcoSIM RPlantRootH2OUptk_pvr. Sign and layer conventions follow EcoSIM. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Current step vertical root water uptake profile m3{H2O}.h-1/{grid} The layer-specific water flux from soil to plant roots across the vertical soil profile from the previous model time step. This historical water uptake information enables robust numerical solutions for plant-soil water coupling and iterative convergence in terrestrial ecosystem models. TWaterPlantRoot2SoilPrev_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Previous step vertical root water uptake profile m3{H2O}.h-1/{grid} The layer-specific heat loss from soil associated with plant water uptake through roots across the vertical soil profile. This thermal flux represents the energy transfer that accompanies water movement from soil to plants and ensures consistent water-energy coupling in terrestrial ecosystem models. THeatLossRoot2Soil_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Vertically profile of root heat uptake MJ/{grid} The vertically integrated heat loss from soil associated with total plant root water uptake across all soil layers. This total thermal flux is used for energy conservation checks and represents the complete energy transfer accompanying plant water acquisition in terrestrial ecosystem models. THeatRootRelease_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root heat release MJ.h-1/{grid} Total internal root gas flux refers to the movement of gases, such as oxygen (O2), carbon dioxide (CO2), and methane (CH4), within plant roots. It represents the sum of all gases exchanged between the plant roots and the surrounding soil or water. This parameter is important in Earth systems modeling as it helps to quantify the exchange of gases between the terrestrial biosphere and the atmosphere, impacting processes such as plant respiration, photosynthesis, and greenhouse gas emissions. trcg_air2root_flx_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total internal root gas flux g.h-1/{grid} Total root internal gas flux refers to the overall movement of gases within the root system of plants. It represents the collective exchange of gases, such as oxygen and carbon dioxide, between the roots and the surrounding soil. This parameter is important for understanding the transport of gases and their impact on root respiration, nutrient uptake, and soil gas composition in Earth system models. trcg_root_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root internal gas flux g.h-1/{grid} The layer-specific uptake of dissolved solutes including gases and nutrients by plant roots from surrounding soil. This solute uptake encompasses all dissolved compounds absorbed by roots and represents an important component of soil-plant chemical transport processes in terrestrial ecosystem models. trcs_Soil2plant_uptake_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root-soil solute flux g.h-1/{grid} The release of carbon, nitrogen, and phosphorus compounds from all plant roots into dissolved soil organic matter pools within each soil layer. This root exudation contributes to soil organic matter dynamics and represents an important pathway for plant-derived organic matter transport in terrestrial biogeochemical models. tRootMycoExud2Soil_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root element exchange g.h-1/{grid} The carbon dioxide emission into root tissues from autotrophic root respiration processes within each soil layer. This internal carbon dioxide flux is essential for tracking gas transport through soil-root systems and represents root metabolic activity in terrestrial ecosystem models. RootCO2Emis2Root_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root carbon dioxide flux into roots g.h-1/{grid} The layer-specific oxygen uptake rate by all plant roots within each soil layer to support root metabolic processes. This oxygen consumption represents the aerobic respiration demand of root tissues and is essential for modeling root function in varying soil oxygen conditions. RUptkRootO2_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root internal oxygen flux taken away from root oxygen gas g.h-1/{grid} The layer-specific oxygen consumption rate by plant roots to support autotrophic respiration and root growth processes. This oxygen sink represents the metabolic oxygen demand of root tissues and is critical for modeling root activity under different soil aeration conditions. RootO2_Xink_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Root oxygen consumption for autotrophic respiration g{O}.h-1/{grid} The vertically integrated oxygen consumption rate by all plant roots across the entire soil profile to support autotrophic respiration. This total oxygen sink represents the whole-plant root metabolic oxygen demand and is used for ecosystem-scale oxygen budget calculations. RootO2_Xink_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Integrated root oxygen consumption for autotrophic respiration g{O}.h-1/{grid} The vertically integrated oxygen uptake rate by all plant roots across the entire soil profile for metabolic processes. This total oxygen uptake represents the ecosystem-scale root oxygen demand and is essential for modeling plant-soil oxygen dynamics in terrestrial ecosystems. RUptkRootO2_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root internal oxygen flux take away from root oxygen gas g.h-1/{grid} The total length of plant roots per unit volume of soil within each soil layer contributed by all plant species in a model grid cell. Root length density represents the spatial extent of root systems within soil and is a key parameter for modeling water and nutrient uptake capacity in terrestrial ecosystem models. totRootLenDens_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root length density m.m-3 The combined oxygen demand by plant roots and soil microorganisms to support aerobic respiration processes within each soil layer. This total oxygen uptake represents the ecosystem-scale oxygen consumption for both plant and microbial metabolism in terrestrial biogeochemical models. REcoO2DmndResp_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root + microbial oxygen uptake g.h-1/{grid} The combined ammonium demand by plant roots and soil microorganisms from non-fertilized soil areas to support growth and metabolic processes. This nitrogen uptake represents the competition between plants and microbes for ammonium in natural soil conditions and is essential for modeling nitrogen cycling dynamics. REcoNH4DmndSoil_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) How to model band vs non-band? PlantDataRateType.txt measurement of missing? Total root + microbial ammonium uptake non-band g.h-1/{grid} The combined nitrate demand by plant roots and soil microorganisms from non-fertilized soil areas to support growth and metabolic processes. This nitrogen uptake represents the competition between plants and microbes for nitrate in natural soil conditions and is essential for modeling nitrogen cycling dynamics. REcoNO3DmndSoil_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root + microbial nitrate uptake non-band g.h-1/{grid} Combined rate of nitrite uptake by plant roots and soil microbes from soil outside fertilizer bands, where they compete for it as they do for ammonium and nitrate. RNO2EcoUptkSoil_vr Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), nitrite correction for issue #79 PlantDataRateType.txt Total root + microbial nitrite uptake non-band g.h-1/{grid} The combined phosphate demand by plant roots and soil microorganisms from non-fertilized soil areas to support growth and metabolic processes. This phosphorus uptake represents the competition between plants and microbes for available phosphate and is critical for modeling phosphorus limitation in terrestrial ecosystems. REcoH2PO4DmndSoil_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root + microbial phosphate uptake non-band g.h-1/{grid} The combined nitrous oxide uptake by plant roots and soil microorganisms to support metabolic processes. This greenhouse gas uptake represents plant-microbial consumption of nitrous oxide and is important for modeling trace gas cycling and atmospheric exchange in terrestrial ecosystems. RN2OEcoUptkSoil_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt measurement of missing? Total root + microbial nitrous oxide uptake g.h-1/{grid} The combined ammonium demand by plant roots and soil microorganisms from fertilizer band zones to support growth and metabolic processes. This enhanced nitrogen uptake represents plant-microbial competition for ammonium in fertilized soil areas and is essential for modeling agricultural management effects on nitrogen cycling. REcoNH4DmndBand_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root + microbial ammonium uptake band g.h-1/{grid} The combined nitrate demand by plant roots and soil microorganisms from fertilizer band zones to support growth and metabolic processes. This enhanced nitrogen uptake represents plant-microbial competition for nitrate in fertilized soil areas and is essential for modeling agricultural management effects on nitrogen cycling. REcoNO3DmndBand_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root + microbial nitrate uptake band g.h-1/{grid} Combined rate of nitrite uptake by plant roots and soil microbes from fertilizer bands in soil, where they compete for it as they do for ammonium and nitrate. RNO2EcoUptkBand_vr Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), nitrite correction for issue #79 PlantDataRateType.txt Total root + microbial nitrite uptake band g.h-1/{grid} The combined phosphate demand by plant roots and soil microorganisms from fertilizer band zones to support growth and metabolic processes. This enhanced phosphorus uptake represents plant-microbial competition for available phosphate in fertilized areas and is critical for modeling agricultural phosphorus management strategies. REcoH2PO4DmndBand_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root + microbial phosphate uptake band g.h-1/{grid} The combined demand for dissolved organic matter by plant roots and soil microorganisms from soil organic carbon pools. Plant uptake occurs through root exudation gradients between root nonstructural carbon, nitrogen, and phosphorus and soil dissolved organic matter, representing plant-microbial competition for organic substrates. RDOMEcoDmndK_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root + microbial dissolved organic carbon uptake g.h-1/{grid} The combined acetate demand by plant roots and soil microorganisms from soil organic acid pools to support metabolic processes. This organic acid uptake represents plant-microbial competition for low molecular weight organic compounds and is important for modeling soil carbon cycling dynamics. RAcetateEcoDmndK_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total root + microbial acetate uptake g.h-1/{grid} A variable concerning measurements of combined processes mediated by plants and microbes. Plant and microbial rate variable NA The total hydrogen gas flux associated with plant root metabolic processes and hydrogen transport. This hydrogen flux represents root-mediated hydrogen cycling and is relevant for modeling trace gas dynamics and anaerobic metabolism in terrestrial ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total root hydrogen flux g/{grid} The layer-specific carbon dioxide release from plant root autotrophic respiration processes during the current model time step. This root respiration represents the metabolic carbon dioxide production by root tissues and is fundamental for modeling soil carbon dioxide efflux and root metabolism. RootCO2Autor_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Root autotrophic respiration g{C}.h-1/{grid} The vertically integrated carbon dioxide release from plant root autotrophic respiration across all soil layers during the current model time step. This total root respiration represents the ecosystem-scale root metabolic carbon dioxide production and is essential for modeling soil carbon dioxide efflux. RootCO2Autor_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Current time step root autotrophic respiration g{C}.h-1/{grid} The vertically integrated carbon dioxide release from plant root autotrophic respiration across all soil layers during the previous model time step. This historical root respiration information enables stable numerical solutions and temporal integration schemes in terrestrial ecosystem models. RootCO2AutorPrev_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Previous time step root autotrophic respiration g{C}.h-1/{grid} The dimensionless scaling factor representing the sensitivity of root and mycorrhizal growth to soil matric potential and moisture conditions. This moisture dependence scalar modulates root growth rates based on soil water availability and is critical for modeling plant responses to drought stress. fRootGrowPSISense_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Moisture dependence scalar for root growth 1 The layer-specific carbon dioxide release from root autotrophic respiration into surrounding soil through root-soil gas exchange processes. This root-derived carbon dioxide flux contributes to soil carbon dioxide concentrations and represents an important component of soil respiration in terrestrial ecosystems. RootCO2Ar2Soil_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Autotrophic root respiration released to soil g{C}.h-1/{grid} The vertically integrated carbon dioxide release from all plant root autotrophic respiration into soil through root-soil gas exchange across all soil layers. This total root-derived soil carbon dioxide flux represents the ecosystem-scale contribution of root respiration to soil carbon dioxide concentrations. RootCO2Ar2Soil_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total autotrophic root respiration released to soil g{C}.h-1/{grid} The layer-specific carbon dioxide release from root autotrophic respiration that remains within root tissues through internal gas exchange processes. This internal root carbon dioxide represents the accumulation of respiratory carbon dioxide within root air spaces before soil exchange. RootCO2Ar2Root_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Autotrophic root respiration released to root g{C}.h-1/{grid} The vertically integrated carbon dioxide release from all plant root autotrophic respiration that remains within root tissues through internal gas exchange across all soil layers. This total internal root carbon dioxide represents the ecosystem-scale accumulation of respiratory carbon dioxide in root air spaces. RootCO2Ar2Root_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Total autotrophic root respiration released to root g{C}.h-1/{grid} The layer-specific release of dissolved gases and solutes from decomposing root tissues into surrounding soil. This root mortality flux represents the transfer of root-stored compounds to soil pools upon root death and is important for modeling soil organic matter inputs. trcs_deadroot2soil_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Gases released to soil due to dying roots g.h-1/{grid} The vertically integrated release of dissolved gases and solutes from decomposing root tissues into soil across all soil layers. This total root mortality flux represents the ecosystem-scale transfer of root-derived compounds to soil organic matter pools. trcs_deadroot2soil_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantDataRateType.txt Gas released to soil due to dying roots g.h-1/{grid} A dimensionless scaling factor that modifies irrigation application rates or timing based on environmental conditions or management decisions. This irrigation modifier represents adaptive irrigation management strategies and is used to optimize water application efficiency in agricultural water management models. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Measured in water or soil? Change factor for irrigation 1 The concentration of dissolved carbon dioxide in subsurface irrigation water applied below the soil surface. This greenhouse gas concentration affects soil carbon dioxide dynamics and root respiration processes, and is important for modeling irrigation impacts on soil biogeochemistry. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Measured in water or soil? Subsurface irrigation carbon dioxide concentration g.m-3 The concentration of dissolved methane in subsurface irrigation water applied below the soil surface. This greenhouse gas concentration influences soil methane dynamics and anaerobic processes, and is relevant for modeling irrigation effects on trace gas cycling in agricultural systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Measured in water or soil? Subsurface irrigation methane concentration g.m-3 The concentration of dissolved oxygen in subsurface irrigation water applied below the soil surface. This oxygen concentration affects soil aeration, root respiration, and microbial processes, and is critical for modeling irrigation impacts on soil redox conditions and plant health. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Measured in water or soil? Subsurface irrigation oxygen concentration g.m-3 The concentration of dissolved nitrogen compounds in subsurface irrigation water applied below the soil surface. This nitrogen concentration provides plant nutrients and affects soil nitrogen cycling, and is essential for modeling fertigation effects on crop nutrition and nitrogen management. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Measured in water or soil? Subsurface irrigation nitrogen concentration g.m-3 The concentration of dissolved nitrous oxide in subsurface irrigation water applied below the soil surface. This greenhouse gas concentration influences soil nitrous oxide emissions and nitrogen transformation processes, and is important for modeling irrigation effects on agricultural greenhouse gas budgets. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Measured in water or soil? Subsurface irrigation nitrous oxide concentration g.m-3 The temporal scheduling parameters that determine when automated irrigation systems begin and cease water application based on predefined environmental or crop criteria. These irrigation timing constraints are essential for modeling automated agricultural water management and optimizing crop water use efficiency. IIRRA Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) How to decompose terms for management practices? Not really measured in, etc. IrrigationDataType.txt Start and end dates of automated irrigation NA The rate of water delivery to agricultural soils through irrigation systems to supplement natural precipitation. This irrigation water application rate is fundamental for modeling crop water balance, soil moisture dynamics, and agricultural water management strategies in terrestrial ecosystem models. RRIG Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) How to decompose terms for management practices? Not really measured in, etc. IrrigationDataType.txt Irrigation application rate mm.h-1 The soil depth to which irrigation water penetrates during application, influencing water and nutrient distribution in the root zone. This irrigation depth parameter affects crop water use efficiency, nutrient availability, and soil water redistribution patterns, and is essential for optimizing agricultural water management practices. WDPTH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) For depth measurements, should this usually be in soil or water? How to decompose terms for management practices? Not really measured in, etc. IrrigationDataType.txt Depth of irrigation application m The volumetric rate of water application through subsurface irrigation systems at specific soil depths below the surface. This belowground irrigation method delivers water directly to root zones and minimizes evaporation losses, representing an efficient water delivery strategy in agricultural water management models. IrrigSubsurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) How does this differ from the concept term? IrrigationDataType.txt Underground irrigation rate m3.h-1/{grid} The volumetric rate of water application through surface irrigation systems at the soil surface level. This aboveground irrigation method applies water that infiltrates downward through the soil profile and represents traditional flood or furrow irrigation practices in agricultural water management models. IrrigSurface_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) How does this differ from the concept term? IrrigationDataType.txt Rate of water application in surface irrigation m3.h-1/{grid} The dimensionless threshold representing the fraction of field capacity minus wilting point below which automated irrigation systems activate. This soil moisture trigger controls irrigation timing based on plant available water content and is critical for optimizing automated agricultural water management strategies. FIRRA_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) IrrigationDataType.txt Fraction of field capacity minus wilting point below which automatic irrigation applied 1 The dimensionless target representing the fraction of field capacity minus wilting point to which automated irrigation systems apply water. This soil moisture restoration target determines irrigation application amounts and is essential for maintaining optimal soil water conditions in automated agricultural systems. CIRRA_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) IrrigationDataType.txt Fraction of field capacity minus wilting point to which automatic irrigation applied 1 The soil depth to which automated irrigation systems deliver water when triggered by soil moisture or crop water stress criteria. This irrigation penetration depth ensures adequate water supply to plant root zones and represents a critical design parameter for automated agricultural water management systems. DIRRA Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) IrrigationDataType.txt Depth to which automatic irrigation applied m The cumulative dimensionless change in irrigation application rates or timing relative to baseline conditions over a specified time period. This irrigation adjustment metric tracks adaptive management responses and represents the integrated effect of environmental or management factors on irrigation strategies. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Accumulated relative change for irrigation 1 The hydrogen ion concentration of water used in surface irrigation systems, expressed on the logarithmic pH scale. This irrigation water acidity affects soil pH, nutrient availability, and plant uptake processes, and is important for managing soil chemistry and crop nutrition in agricultural systems. PHQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) IrrigationDataType.txt Surface irrigation pH 1 The concentration of dissolved ammonium ions in water used for surface irrigation systems that apply water directly to soil surfaces. This nitrogen concentration provides plant nutrients through fertigation and affects soil nitrogen cycling, representing an important component of integrated crop nutrition management strategies. NH4_irrig_mole_conc Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation ammonium concentration g.m-3 The concentration of dissolved nitrate ions in water used for surface irrigation systems that apply water to soil surfaces. This nitrogen concentration provides essential plant nutrients through fertigation but can contribute to water quality issues if excessive, making it critical for managing agricultural nutrient balances and environmental impacts. NO3_irrig_mole_conc Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation nitrate concentration g.m-3 The concentration of dissolved dihydrogen phosphate ions in water used for surface irrigation systems that supply plant-available phosphorus. This phosphorus concentration affects soil nutrient availability and pH conditions, and is essential for optimizing crop nutrition while managing soil phosphorus dynamics in agricultural systems. H2PO4_irrig_mole_conc Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation dihydrogen phosphate concentration g.m-3 The concentration of dissolved aluminum in water used for surface irrigation systems applied to agricultural soils. This metal concentration can affect soil chemistry, plant toxicity, and crop productivity, and is important for assessing irrigation water quality and potential impacts on soil health in agricultural water management. CALQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation aluminum concentration g.m-3 The concentration of dissolved iron in water used for surface irrigation systems applied to agricultural soils. This metal concentration affects soil fertility, nutrient cycling, and plant micronutrient availability, and is important for managing irrigation water quality and understanding biogeochemical iron cycling in agricultural ecosystems. CFEQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation iron concentration g.m-3 The concentration of hydrogen ions in water used for surface irrigation systems, which determines water acidity and pH levels. This hydrogen concentration affects soil chemistry, nutrient availability, and plant uptake processes, and is critical for assessing irrigation water quality impacts on agricultural soil health and crop productivity. CHYQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation hydrogen concentration g.m-3 The concentration of dissolved calcium in water used for surface irrigation systems applied to agricultural soils. This essential nutrient concentration affects soil structure, cation exchange capacity, and plant nutrition, and is important for managing soil fertility and calcium balance in irrigated agricultural systems. CCAQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation calcium concentration g.m-3 The concentration of dissolved magnesium in water used for surface irrigation systems applied to agricultural soils. This essential nutrient concentration affects soil fertility, plant photosynthesis, and chlorophyll production, and is important for maintaining optimal magnesium balance in irrigated agricultural systems. CMGQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation magnesium concentration g.m-3 The concentration of dissolved sodium in water used for surface irrigation systems applied to agricultural soils. This cation concentration significantly influences soil salinity, sodicity, and plant salt stress, and is critical for assessing irrigation water quality and managing saline conditions in irrigated agricultural systems. CNAQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation sodium concentration g.m-3 The concentration of dissolved potassium in water used for surface irrigation systems applied to agricultural soils. This essential macronutrient concentration affects plant growth, enzyme function, and water regulation, and is important for optimizing crop nutrition and potassium management in irrigated agricultural systems. CKAQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation potassium concentration g.m-3 The concentration of hydroxide ions in water used for surface irrigation systems, which determines water alkalinity and pH levels. This hydroxide concentration affects soil chemistry, nutrient availability, and plant uptake processes, and is essential for managing alkaline conditions in irrigated agricultural systems. COHQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation hydroxide concentration g.m-3 The concentration of dissolved sulfate ions in water used for surface irrigation systems applied to agricultural soils. This sulfur-containing anion affects soil chemistry, plant sulfur nutrition, and water quality, and is important for managing sulfate levels and plant nutrient balance in irrigated agricultural systems. CSOQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation sulfate concentration g.m-3 The concentration of dissolved chloride ions in water used for surface irrigation systems applied to agricultural soils. This anion concentration contributes to water salinity, affects plant salt tolerance, and can cause chloride toxicity in sensitive crops, making it critical for managing saline irrigation water quality. CCLQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation chloride concentration g.m-3 The concentration of dissolved carbonate ions in water used for surface irrigation systems applied to agricultural soils. This carbon-containing anion affects water alkalinity, soil pH buffering capacity, and nutrient availability, and is important for managing alkaline irrigation conditions in agricultural systems. CC3Q Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation carbonate concentration g.m-3 The concentration of dissolved bicarbonate ions in water used for surface irrigation systems applied to agricultural soils. This carbon-containing anion affects water alkalinity, soil pH, and nutrient availability, and is essential for assessing alkaline irrigation water quality and its impacts on soil chemistry. CHCQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation bicarbonate concentration g.m-3 Concentration of the aluminum monohydroxide ion, Al(OH)(2+), in water applied by surface irrigation. CAL1Q Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) EcoSIM stores one value for each day of the year. Group Curated IrrigationDataType.txt Surface irrigation aluminum monohydroxide concentration g.m-3 Concentration of the aluminum dihydroxide ion, Al(OH)2(+), in water applied by surface irrigation. CAL2Q Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) EcoSIM stores one value for each day of the year. Group Curated IrrigationDataType.txt Surface irrigation aluminum dihydroxide concentration g.m-3 Concentration of dissolved aluminum trihydroxide, Al(OH)3(aq), in water applied by surface irrigation. CAL3Q Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) EcoSIM stores one value for each day of the year. Group Curated IrrigationDataType.txt Surface irrigation aluminum trihydroxide concentration g.m-3 Concentration of the aluminum tetrahydroxide ion, Al(OH)4(-), in water applied by surface irrigation. CAL4Q Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) EcoSIM stores one value for each day of the year. Group Curated IrrigationDataType.txt Surface irrigation aluminum tetrahydroxide concentration g.m-3 The concentration of aluminum sulfate (AlSO4) in the water used for surface irrigation. This parameter is important in earth systems modeling as it can impact the soil chemistry and plant health in irrigated areas. The concentration of AlSO4 in surface irrigation water can affect the availability and uptake of nutrients by plants, as well as the potential for aluminum toxicity in the soil. Monitoring and understanding the surface irrigation AlSO4 concentration is crucial for accurately simulating the impacts of irrigation practices on agricultural productivity and ecosystem health. CALSQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation aluminum sulfate concentration g.m-3 Concentration of the iron(III) monohydroxide ion, Fe(OH)(2+), in water applied by surface irrigation. CFE1Q Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) EcoSIM stores one value for each day of the year. Group Curated IrrigationDataType.txt Surface irrigation iron(III) monohydroxide concentration g.m-3 Concentration of the iron(III) dihydroxide ion, Fe(OH)2(+), in water applied by surface irrigation. CFE2Q Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) EcoSIM stores one value for each day of the year. Group Curated IrrigationDataType.txt Surface irrigation iron(III) dihydroxide concentration g.m-3 Concentration of dissolved iron(III) trihydroxide, Fe(OH)3(aq), in water applied by surface irrigation. CFE3Q Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) EcoSIM stores one value for each day of the year. Group Curated IrrigationDataType.txt Surface irrigation iron(III) trihydroxide concentration g.m-3 Concentration of the iron(III) tetrahydroxide ion, Fe(OH)4(-), in water applied by surface irrigation. CFE4Q Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) EcoSIM stores one value for each day of the year. Group Curated IrrigationDataType.txt Surface irrigation iron(III) tetrahydroxide concentration g.m-3 The concentration of iron sulfate (FeSO4) in the water used for surface irrigation. It is a parameter that quantifies the amount of dissolved iron sulfate present in the irrigation water, which is typically used to supply essential iron nutrients to crops during surface irrigation. The concentration of FeSO4 affects the availability and uptake of iron by plants, influencing their growth, development, and overall productivity. CFESQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation iron sulfate concentration g.m-3 The concentration of calcium hydroxide (CaOH) in the water used for surface irrigation. It is a parameter that affects the quality of the irrigation water and can have an impact on soil pH and nutrient availability for plants. The CaOH concentration is typically measured in units of mass per volume (e.g., mg/L) and is an important parameter to consider when assessing the potential effects of irrigation water on crop growth and soil chemistry. CCAOQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation calcium hydroxide concentration g.m-3 The amount of calcium carbonate (CaCO3) present in the water used for surface irrigation of agricultural fields. It represents the concentration of this mineral compound, which can influence the water quality and its potential to cause scaling or clogging in irrigation systems. Monitoring and modeling surface irrigation CaCO3 concentration is important for understanding its impact on soil properties, nutrient availability, crop growth, and the overall sustainability of agricultural practices. CCACQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation calcium carbonate concentration g.m-3 The concentration of calcium bicarbonate (CaHCO3) in water used for surface irrigation. Surface irrigation is a method of watering crops where water is distributed over the soil surface and allowed to infiltrate into the root zone. The CaHCO3 concentration in the irrigation water can affect soil pH, nutrient availability, and plant growth. Monitoring this parameter is important for understanding the potential impacts of water quality on agricultural productivity and soil health in surface irrigation systems. CCAHQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation calcium bicarbonate concentration g.m-3 The amount of calcium sulfate (CaSO4) present in the water used for surface irrigation. It represents the concentration of CaSO4 in the irrigation water that is applied to the soil surface to irrigate crops or vegetation. This parameter is important in earth systems modeling as it can affect various processes such as soil salinity, nutrient availability, and crop growth. High concentrations of CaSO4 can lead to increased salinity in the soil, which can negatively impact plant water uptake and overall crop productivity. Monitoring and understanding the surface irrigation CaSO4 concentration can help in predicting and managing the potential effects on agricultural systems and water resources. CCASQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation calcium sulfate concentration g.m-3 The concentration of magnesium hydroxide (MgOH) in water used for surface irrigation. It is a parameter used in earth systems modeling to quantify the amount of MgOH present in the irrigation water, which has implications for plant health, soil fertility, and water quality. The concentration is typically expressed in units of milligrams per liter (mg/L) or parts per million (ppm). CMGOQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation magnesium hydroxide concentration g.m-3 The concentration of magnesium carbonate (MgCO3) in the water used for surface irrigation. It represents the amount of magnesium carbonate dissolved in the irrigation water, typically measured in milligrams per liter (mg/L) or parts per million (ppm). This parameter is important for understanding the potential impacts of irrigation on soil chemistry and the overall nutrient balance in agricultural systems. High levels of magnesium carbonate in irrigation water can affect soil pH and fertility, potentially influencing plant growth and crop yields. Monitoring and managing surface irrigation MgCO3 concentration is therefore crucial for sustainable agricultural practices and effective water resource management. CMGCQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation magnesium carbonate concentration g.m-3 The concentration of dissolved magnesium bicarbonate in water used for surface irrigation systems applied to agricultural soils. This compound affects water alkalinity, soil magnesium availability, and buffering capacity, and is important for managing soil fertility and pH conditions in irrigated agricultural systems. CMGHQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation magnesium bicarbonate concentration g.m-3 The concentration of dissolved magnesium sulfate in water used for surface irrigation systems applied to agricultural soils. This compound provides both magnesium and sulfur nutrients to crops, affects water salinity, and is important for managing soil fertility and crop nutrition in irrigated agricultural systems. CMGSQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation magnesium sulfate concentration g.m-3 The concentration of dissolved sodium carbonate in water used for surface irrigation systems applied to agricultural soils. This highly alkaline compound significantly affects soil pH, sodium hazard, and can cause soil alkalinization, making it critical for assessing irrigation water quality and soil management in agricultural systems. CNACQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation sodium carbonate concentration g.m-3 The concentration of dissolved sodium sulfate in water used for surface irrigation systems applied to agricultural soils. This salt contributes to water salinity, affects soil sodium levels and crop salt tolerance, and is important for assessing saline irrigation water impacts on agricultural productivity. CNASQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation sodium sulfate concentration g.m-3 The concentration of dissolved phosphate ions in water used for surface irrigation systems applied to agricultural soils. This essential macronutrient concentration affects plant phosphorus nutrition, soil phosphorus dynamics, and potential eutrophication of water bodies, making it critical for managing fertilizer applications and water quality. CH0PQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation phosphate concentration g.m-3 The concentration of dissolved hydrogen phosphate ions in water used for surface irrigation systems applied to agricultural soils. This plant-available phosphorus form affects crop nutrition, soil phosphorus cycling, and water quality, and is essential for optimizing phosphorus management in irrigated agricultural systems. HPO4_irrig_mole_conc Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation hydrogen phosphate concentration g.m-3 The concentration of dissolved phosphoric acid in water used for surface irrigation systems applied to agricultural soils. This acidic phosphorus compound affects water pH, phosphorus availability, and soil chemistry, and is important for managing acid irrigation water impacts on soil and crop health. CH3PQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation phosphoric acid concentration g.m-3 The concentration of dissolved iron hydrogen phosphate in water used for surface irrigation systems applied to agricultural soils. This iron-phosphorus compound affects both iron and phosphorus availability to plants, represents a combined micronutrient and macronutrient source, and is relevant for managing crop nutrition in irrigated systems. CF1PQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation iron hydrogen phosphate concentration g.m-3 The concentration of dissolved iron dihydrogen phosphate in water used for surface irrigation systems applied to agricultural soils. This iron-phosphorus compound provides both essential micronutrient iron and macronutrient phosphorus to crops, and is important for managing integrated nutrient delivery through fertigation in irrigated agricultural systems. CF2PQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation iron dihydrogen phosphate concentration g.m-3 The concentration of dissolved calcium phosphate in water used for surface irrigation systems applied to agricultural soils. This calcium-phosphorus compound provides both essential macronutrient phosphorus and calcium to crops, affects soil fertility and nutrient cycling, and is important for managing integrated nutrient delivery in irrigated agricultural systems. CC0PQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation calcium phosphate concentration g.m-3 The concentration of dissolved dicalcium phosphate in water used for surface irrigation systems applied to agricultural soils. This calcium-phosphorus compound affects soil pH, provides plant nutrients, and influences soil phosphorus and calcium dynamics in irrigated agricultural systems. CC1PQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation dicalcium phosphate concentration g.m-3 The concentration of dissolved calcium dihydrogen phosphate in water used for surface irrigation systems applied to agricultural soils. This highly soluble calcium-phosphorus compound provides readily available phosphorus and calcium nutrients to crops and is important for managing soil fertility in irrigated agricultural systems. CC2PQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation calcium dihydrogen phosphate concentration g.m-3 The concentration of dissolved magnesium hydrogen phosphate in water used for surface irrigation systems applied to agricultural soils. This magnesium-phosphorus compound provides both essential nutrients to crops, affects soil pH and nutrient balance, and is important for managing integrated crop nutrition in irrigated agricultural systems. CM1PQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated IrrigationDataType.txt Surface irrigation magnesium hydrogen phosphate concentration g.m-3 The total ionic concentration or salinity level of water used for surface irrigation systems applied to agricultural soils. This measure of dissolved ion content affects water conductivity, soil salinity, plant osmotic stress, and is critical for assessing irrigation water quality and managing salt-sensitive crops. CSTRQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) IrrigationDataType.txt Surface irrigation ion strength g.m-3 The concentration of dissolved volatile gases including nitrogen, oxygen, argon, carbon dioxide, methane, ammonia, nitrous oxide, and hydrogen in surface irrigation water. These dissolved gases affect soil gas dynamics, root respiration, and biogeochemical processes when irrigation water infiltrates agricultural soils. trcg_irrig_mole_conc_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) IrrigationDataType.txt Surface irrigation volatile concentration mol.m-3 The concentration of essential plant nutrients including nitrogen, phosphorus, and potassium in water used for subsurface irrigation systems. These nutrients are delivered directly to plant root zones through belowground application, representing an efficient fertigation approach for managing crop nutrition in agricultural systems. trcn_irrig_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) IrrigationDataType.txt Subsurface irrigation nutrient concentration g.m-3 The concentration of dissolved salts and mineral compounds including iron, calcium, magnesium, chloride, aluminum, and bicarbonate in subsurface irrigation water. These chemical concentrations affect soil chemistry, nutrient availability, and plant growth when applied through belowground irrigation systems. trcSalt_Irrig_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) IrrigationDataType.txt Subsurface irrigation chemical concentration g.m-3 The volumetric rate of subsurface irrigation water infiltration into soil micropores across different soil layers based on soil moisture thresholds. This belowground water application targets fine soil pore spaces and represents precise water delivery for optimal root zone hydration in agricultural systems. FWatIrrigate2MicP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) IrrigationDataType.txt Underground irrigation to micropores m3.h-1/{grid} The layer-specific heat flux associated with subsurface irrigation water application at different soil depths. This thermal energy transfer from irrigation water affects soil temperature dynamics and is important for modeling soil heat balance and temperature-dependent biogeochemical processes in irrigated systems. HeatIrrigation_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) IrrigationDataType.txt Convective heat due to underground irrigation MJ.h-1/{grid} The flux of dissolved non-saline compounds including organic molecules, trace elements, and other chemical solutes in subsurface irrigation water. These dissolved substances affect soil chemistry, water quality, and potential environmental impacts when applied through belowground irrigation systems. trcs_Irrig_flx_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) IrrigationDataType.txt Aqueous non-salt solutes in underground irrigation g.h-1/{grid} The molar concentration of dissolved salt compounds used as chemical tracers in irrigation water to track water movement and salt transport. This tracer concentration enables monitoring of irrigation water fate and salt accumulation patterns in agricultural soils and groundwater systems. trcsalt_irrig_mole_conc_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) IrrigationDataType.txt Salt tracer concentration in irrigation g.m-3 The total mass flux of dissolved chemical tracers applied to soils through irrigation water systems. This solute input represents the irrigation-mediated delivery of dissolved compounds to agricultural soils and is essential for tracking chemical fate and transport in irrigated systems. trcs_irrig_flx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) IrrigationDataType.txt Tracer flux through irrigation g.h-1/{grid} The rate of nonstructural carbon mobilization to support synthesis of new plant organs including leaves, petioles, stalks, reserves, husks, and grains. This carbon allocation rate represents the conversion of stored carbon compounds into structural plant biomass and is fundamental for modeling plant growth and development. canopy_growth_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy structural growth rate g{C}.h-1 The dimensionless stress factor representing how changes in leaf turgor pressure affect stomatal conductance due to variations in leaf osmotic and water potential. This drought stress indicator ranges from zero to one and reflects plant water stress from soil water deficit, flooding-induced hypoxia, or saline conditions. StomatalStress_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Stomatal stress from turgor pressure MPa The fraction of incoming photosynthetically active radiation reflected by plant canopies of specific functional types. This dimensionless albedo parameter quantifies canopy light reflection properties that affect energy balance and radiation budgets, and is influenced by leaf angle distribution, optical properties, and canopy architecture. CanopyPARalbedo_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated Canopy photosynthetically active radiation albedo 1 The fraction of incident photosynthetically active radiation that passes through plant canopies without being absorbed or reflected. This dimensionless transmissivity parameter depends on leaf area index, leaf angle distribution, and radiation conditions, and is critical for modeling understory light availability and photosynthetic activity. RadPARLeafTransmis_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated Canopy photosynthetically active radiation transmissivity 1 The fraction of incident shortwave solar radiation absorbed by vegetation canopies for energy conversion processes. This dimensionless absorptivity parameter represents canopy efficiency in capturing solar energy and affects ecosystem energy balance, photosynthesis, evapotranspiration, and surface temperature dynamics. LeafSWabsorpty_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated Canopy shortwave absorptivity 1 The fraction of incident photosynthetically active radiation absorbed by vegetation canopies for photosynthetic processes. This dimensionless absorptivity parameter quantifies canopy efficiency in capturing photosynthetically useful light and directly affects primary productivity and plant growth rates. LeafPARabsorpty_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated Canopy photosynthetically active radiation absorptivity 1 The maximum resistance to water vapor diffusion through plant cuticles and closed stomata when stomatal conductance is minimal. This resistance parameter represents the baseline transpiration barrier and is fundamental for modeling minimum plant water loss rates under stress conditions. CuticleResist_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated Maximum stomatal resistance to vapor s.h-1 s.m-1 The maximum resistance to carbon dioxide diffusion through plant stomata when stomatal apertures are at minimum opening. This resistance parameter represents the upper limit of stomatal barrier to carbon dioxide uptake and is critical for modeling photosynthetic carbon assimilation under stress conditions. RCMX CO2CuticleResist_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated Maximum stomatal resistance to carbon dioxide s.h-1 The dimensionless shape parameter used in mathematical models to quantify the relationship between leaf turgor pressure and stomatal resistance. This parameter determines how turgor pressure changes affect stomatal aperture and influences the sensitivity of stomatal conductance to plant water status. RCS_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Shape parameter for calculating stomatal resistance from turgor pressure 1 The integrated resistance to water vapor diffusion through all stomata in a plant canopy, representing the reciprocal of canopy stomatal conductance. This canopy-scale resistance parameter controls the rate of transpiration from vegetation to the atmosphere and is fundamental for modeling plant-atmosphere water exchange. CanPStomaResistH2O_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy stomatal resistance h.m-1 The minimum resistance to water vapor diffusion through plant canopy stomata when stomatal conductance is at maximum capacity. This resistance parameter represents optimal stomatal opening conditions and is determined by carbon dioxide concentration gradients between leaf interior and atmosphere. MinCanPStomaResistH2O_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy minimum stomatal resistance s.m-1 The resistance to heat, moisture, and gas transfer between vegetation canopies and the overlying atmosphere through the boundary layer of still air. This aerodynamic resistance parameter controls the efficiency of scalar exchange processes and is fundamental for modeling canopy-atmosphere interactions in terrestrial ecosystems. CanopyBndlResist_col CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy boundary layer resistance h.m-1 m.h-1 The concentration of oxygen gas in canopy air spaces surrounding plant leaves. This oxygen concentration affects Rubisco enzyme oxygenation reactions that compete with carbon dioxide fixation during photosynthesis and influences photorespiration rates in terrestrial plants. O2I_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Leaf gaseous concentration umol.m-3 The concentration of carbon dioxide gas in intercellular air spaces within plant leaves. This intracellular carbon dioxide concentration represents the substrate availability for photosynthetic carbon fixation and is determined by stomatal conductance and carboxylation rates. LeafIntracellularCO2_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Leaf gaseous carbon dioxide concentration umol.m-3 The total molar concentration of all gaseous compounds in canopy air including atmospheric gases, greenhouse gases, and trace gas species. This comprehensive gas concentration parameter represents the overall atmospheric composition affecting plant physiological processes and biogeochemical cycling. AirConc_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total gas concentration mol.m-3 The concentration gradient of carbon dioxide gas between the atmosphere and leaf intercellular spaces that drives photosynthetic carbon assimilation. This concentration difference represents the driving force for carbon dioxide uptake through stomatal apertures and maintains photosynthetic activity in terrestrial plants. DiffCO2Atmos2Intracel_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Gaseous carbon dioxide concentration difference across stomates umol.m-3 The molar mixing ratio of carbon dioxide gas within vegetation canopy air spaces. This canopy-scale carbon dioxide concentration affects photosynthetic carbon uptake, plant respiration, and canopy-atmosphere carbon exchange processes in terrestrial ecosystems. CanopyGasCO2_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy gaseous carbon dioxide concentration umol.mol-1 The concentration of dissolved carbon dioxide in leaf cellular water that serves as the direct substrate for photosynthetic carbon fixation by mesophyll cells. This aqueous carbon dioxide concentration determines the availability of carbon substrate for Rubisco carboxylation reactions. aquCO2Intraleaf_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Leaf aqueous carbon dioxide concentration umol.L-1 The concentration of dissolved oxygen in leaf cellular water that affects photosynthetic and respiratory processes in mesophyll cells. This aqueous oxygen concentration influences Rubisco oxygenation reactions and photorespiration rates in plant leaves. O2L_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Leaf aqueous concentration umol.L-1 The solubility coefficient describing the equilibrium between gaseous and dissolved carbon dioxide in leaf cellular water at specific temperature and pressure conditions. This solubility parameter determines carbon dioxide availability for photosynthetic reactions and affects gas exchange processes between leaf air spaces and aqueous phases. CO2Solubility_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Leaf carbon dioxide solubility umol.L-1/(umol.mol-1) The solubility coefficient describing the equilibrium between gaseous and dissolved oxygen in leaf cellular water at specific temperature and pressure conditions. This solubility parameter affects oxygen availability for respiratory processes and Rubisco oxygenation reactions in plant leaves. LeafO2Solubility_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Oxygen? Leaf solubility umol.L-1/(umol.mol-1) The Michaelis-Menten constant for Rubisco carboxylation reactions with dissolved carbon dioxide in leaf cells under oxygen-free conditions. This kinetic parameter represents the carbon dioxide concentration at half-maximum carboxylation rate and varies with temperature. Km4LeafaqCO2_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Leaf aqueous carbon dioxide Km no oxygen umol.L-1 The Michaelis-Menten constant for Rubisco carboxylation reactions with dissolved carbon dioxide in leaf cells under ambient oxygen conditions. This apparent kinetic parameter accounts for competitive inhibition by oxygen and represents the effective carbon dioxide affinity of Rubisco in natural conditions. Km4RubiscoCarboxy_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Leaf aqueous carbon dioxide Km ambient oxygen umol.L-1 The reduction in photosynthetic carbon dioxide fixation rates caused by exposure to low temperatures that impair enzymatic activity and metabolic processes. This temperature stress parameter quantifies plant sensitivity to cold conditions and is essential for modeling photosynthetic responses to climate variability and seasonal temperature changes. ChillHours_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Chilling effect on carbon dioxide fixation 1 The maximum rate of carbon dioxide carboxylation by Rubisco enzymes under saturating carbon dioxide concentrations and optimal temperature conditions. This enzyme kinetic parameter represents the maximum carboxylation capacity in the absence of carbon dioxide limitation and is fundamental for modeling photosynthetic potential. Vmax4RubiscoCarboxy_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Maximum dark carboxylation rate under saturating carbon dioxide umol.m-2.s-1 The rate of carbon dioxide incorporation into organic compounds through Rubisco-catalyzed carboxylation reactions during photosynthesis. This carbon fixation rate is influenced by environmental factors including light intensity, temperature, water availability, and atmospheric carbon dioxide concentration. CO2lmtRubiscoCarboxyRate_node CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Carboxylation rate umol.m-2.s-1 The atmospheric carbon dioxide concentration at which photosynthetic carbon dioxide uptake exactly balances respiratory carbon dioxide release, resulting in zero net carbon exchange. This critical physiological threshold determines the minimum carbon dioxide concentration required for net carbon gain and varies with temperature and plant species. CO2CompenPoint_node CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Carbon dioxide compensation point umol.L-1 The maximum rate of carbon dioxide carboxylation under light-saturated conditions when carbon dioxide concentration is non-limiting. This light-saturated carboxylation rate represents the upper limit of photosynthetic carbon fixation capacity and determines photosynthetic efficiency under optimal light and carbon dioxide conditions. LigthSatCarboxyRate_node CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Maximum light carboxylation rate under saturating carbon dioxide umol.m-2.s-1 The efficiency of carbon dioxide conversion into organic compounds through Rubisco-catalyzed carboxylation reactions, expressed as a dimensionless ratio. This efficiency parameter represents plant carbon use effectiveness and is influenced by environmental factors including temperature, light intensity, and atmospheric carbon dioxide concentration. RubiscoCarboxyEff_node CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Carboxylation efficiency umol.umol-1 The mass of nonstructural carbon compounds in bundle sheath cells of C4 plants that participate in the specialized C4 photosynthetic carbon concentrating mechanism. These nonstructural carbon pools support the C4 pathway that optimizes carbon dioxide uptake and water use efficiency in warm-climate grasses and crops. CMassCO2BundleSheath_node CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Bundle sheath nonstructural C3 content in C4 photosynthesis g/{grid} The maximum rate of C4 pathway carboxylation by phosphoenolpyruvate carboxylase enzyme under saturating carbon dioxide concentrations in the absence of light. This dark carboxylation capacity represents the maximum C4 carbon fixation potential and is crucial for modeling C4 plant photosynthetic performance. Vmax4PEPCarboxy_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Maximum dark C4 carboxylation rate under saturating carbon dioxide umol.m-2.s-1 The rate of carbon dioxide fixation through the C4 photosynthetic pathway catalyzed by phosphoenolpyruvate carboxylase enzyme. This C4 carboxylation rate represents the initial carbon dioxide capture step in the C4 carbon concentrating mechanism that enhances photosynthetic efficiency in warm climates. CO2lmtPEPCarboxyRate_node CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) C4 carboxylation rate umol.m-2.s-1 The maximum rate of C4 pathway carboxylation under light-saturated conditions when carbon dioxide concentration is non-limiting. This light-saturated C4 carboxylation capacity represents the upper limit of C4 photosynthetic carbon fixation and determines C4 plant productivity under optimal environmental conditions. LigthSatC4CarboxyRate_node CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Maximum light C4 carboxylation rate under saturating carbon dioxide umol.m-2.s-1 The efficiency of carbon dioxide fixation through the C4 photosynthetic pathway, expressed as the ratio of carbon dioxide uptake to energy expenditure. This dimensionless efficiency parameter quantifies C4 plant effectiveness in carbon assimilation and represents adaptive advantages for productivity and stress tolerance in warm environments. C4CarboxyEff_node CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) C4 carboxylation efficiency umol.umol-1 The mass of nonstructural carbon compounds including sugars, starches, and other mobile carbon pools in leaves of C4 photosynthetic plants. These nonstructural carbon reserves support plant growth and metabolism and represent intermediate products of the specialized C4 photosynthetic carbon concentrating mechanism. CPOOL4_node CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Leaf nonstructural C4 content in C4 photosynthesis g/{grid} Branch Down-regulation of CO2 fixation refers to the process that reduces the rate of carbon dioxide fixation in a branch of a plant. This process can occur due to environmental changes or physiological feedback mechanism within the plant. RubiscoActivity_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Branch down-regulation of carbon dioxide fixation 1 Negative regulation of the carbon fixation pathway, known as C4 photosynthesis, where the reaction is shut down or slowed down. NutrientCtrlonC4Carboxy_node CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Down-regulation of C4 photosynthesis 1 The net carbon dioxide flux between canopy vegetation and the atmosphere, representing the balance between photosynthetic uptake and respiratory release. This total net canopy carbon dioxide exchange quantifies ecosystem carbon sequestration capacity and is fundamental for terrestrial carbon cycle modeling and climate impact assessments. NetCO2Flx2Canopy_col CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total net canopy carbon dioxide exchange g.h-1/{grid} The maximum carboxylation rate of Ribulose-1,5-bisphosphate carboxylase/oxygenase enzyme at reference temperature. This Rubisco carboxylase activity determines the upper limit of photosynthetic carbon fixation and is a key parameter for modeling plant photosynthetic capacity under varying environmental conditions. VmaxRubCarboxyRef_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Rubisco carboxylase activity umol.g-1.h-1 The rate of oxygen fixation by Ribulose-1,5-bisphosphate carboxylase/oxygenase enzyme leading to photorespiration at reference temperature. This competing oxygenase reaction reduces photosynthetic efficiency and is temperature-dependent, making it crucial for modeling C3 plant responses to climate warming. VmaxRubOxyRef_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Rubisco oxygenase activity umol.g-1.h-1 The maximum carboxylation rate of phosphoenolpyruvate carboxylase enzyme at reference temperature in C4 photosynthetic plants. This enzyme activity determines the initial carbon dioxide fixation step in the C4 pathway and influences C4 plant productivity in warm climate ecosystems. VmaxPEPCarboxyRef_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Phosphoenolpyruvate carboxylase activity umol.g-1.h-1 The Michaelis-Menten constant for Ribulose-1,5-bisphosphate carboxylase/oxygenase carboxylation reaction, representing carbon dioxide concentration at half-maximum reaction rate. This enzyme kinetic parameter determines Rubisco's affinity for carbon dioxide and is essential for modeling photosynthetic responses to atmospheric carbon dioxide changes. XKCO2_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Km for rubisco carboxylase activity umol.L-1 The Michaelis-Menten constant for Ribulose-1,5-bisphosphate carboxylase/oxygenase oxygenation reaction, representing oxygen concentration at half-maximum photorespiration rate. This parameter quantifies Rubisco's competing affinity for oxygen and is critical for modeling temperature effects on C3 photosynthetic efficiency. XKO2_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Km for rubisco oxygenase activity umol.L-1 The Michaelis-Menten constant for phosphoenolpyruvate carboxylase enzyme representing substrate concentration at half-maximum carboxylation rate. This enzyme kinetic parameter determines phosphoenolpyruvate carboxylase efficiency in initial carbon dioxide fixation and influences C4 photosynthetic capacity under varying environmental conditions. Km4PEPCarboxy_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Km for phosphoenolpyruvate carboxylase carboxylase activity umol.L-1 The mass-based concentration of Ribulose-1,5-bisphosphate carboxylase/oxygenase enzyme in leaf tissue expressed as enzyme mass per unit leaf mass. This leaf Rubisco content represents photosynthetic capacity and nitrogen investment in carbon fixation machinery, serving as a key indicator of C3 plant productivity potential. LeafRuBPConc_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Leaf rubisco content g.g-1 The concentration of phosphoenolpyruvate carboxylase enzyme in leaf tissue, representing the primary carbon dioxide fixation enzyme in C4 photosynthetic plants. This leaf phosphoenolpyruvate carboxylase content determines C4 photosynthetic capacity and influences plant productivity responses to environmental factors such as temperature and carbon dioxide concentration. FracLeafProtinAsPEPCarboxyl_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Leaf phosphoenolpyruvate carboxylase content g.g-1 The light absorption activity per unit mass of chlorophyll protein controlling the light-dependent reactions in photosynthesis at reference temperature. This chlorophyll activity parameter determines the efficiency of photon capture and electron transport chain initiation, influencing overall photosynthetic performance under varying light conditions. SpecChloryfilAct_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Chlorophyll activity umol.g-1.h-1 Fraction of total leaf protein carbon that is protein bound to chlorophyll in the light-harvesting complexes, in C3 plants. LeafC3Chl2Protein_pft LeafC3ChlorofilConc_pft leaf C3 chlorophyll content CanopyDataType.txt Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), from the EcoSIM source EcoSIM renamed LeafC3ChlorofilConc_pft to LeafC3Chl2Protein_pft in September 2025 (commit 45e85e6), and now holds the value as LeafProtein2Chl_pft. In C3 plants all of the chlorophyll-bound protein is in the mesophyll. See Leaf chlorophyll-bound protein fraction (BERVO:0001847). Leaf C3 chlorophyll-bound protein fraction g{C_protein}.g-1{C_protein} Fraction of total leaf protein carbon that is protein bound to chlorophyll in the light-harvesting complexes, in C4 plants. LeafC4Chl2Protein_pft LeafC4ChlorofilConc_pft leaf C4 chlorophyll content CanopyDataType.txt Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), from the EcoSIM source EcoSIM renamed LeafC4ChlorofilConc_pft to LeafC4Chl2Protein_pft in September 2025 (commit 45e85e6), and now holds the value as LeafProtein2Chl_pft. In C4 plants EcoSIM splits the chlorophyll-bound protein between mesophyll and bundle sheath by fMesophyllChlProtein_pft. See Leaf chlorophyll-bound protein fraction (BERVO:0001847). Leaf C4 chlorophyll-bound protein fraction g{C_protein}.g-1{C_protein} EcoSIM input: it is a parameter that specifies the ratio between leaf intracellular CO2 to amospheric CO2. It is trait parameter that characterizes different plant species. CanPCi2CaRatio CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Ci:Ca ratio 1 The difference between the total incident solar radiation and the outgoing radiation at the canopy surface of a specific plant functional type (pft). It is an important parameter in earth systems modeling as it drives the energy budget of the canopy and affects various physiological processes such as photosynthesis and transpiration. RadNet2Canopy_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy net radiation MJ.h-1/{grid} The longwave thermal infrared radiation absorbed, emitted, or transmitted by plant canopy structures. This canopy longwave radiation exchange is a critical component of surface energy balance affecting canopy temperature, atmospheric heating, and ecosystem thermal dynamics in climate models. LWRadCanopy_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy longwave radiation MJ.h-1/{grid} The amount of incident shortwave solar radiation absorbed by plant canopy leaves and structures. This absorbed shortwave radiation drives photosynthesis, transpiration, and canopy heating, representing a fundamental energy input for terrestrial ecosystem processes and surface energy balance calculations. RadSWbyCanopy_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy absorbed shortwave radiation MJ.h-1/{grid} The amount of photosynthetically active radiation wavelengths absorbed by plant canopy for use in photosynthetic processes. This absorbed photosynthetically active radiation directly drives carbon fixation and represents the light energy available for primary productivity in terrestrial ecosystem models. RadPARbyCanopy_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy absorbed photosynthetically active radiation umol.m-2.s-1 The proportion of incident photosynthetically active radiation that is absorbed by plant canopy rather than transmitted or reflected. This dimensionless fraction quantifies canopy light interception efficiency and determines photosynthetic light availability for ecosystem productivity modeling. FracPARads2Canopy_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Fraction of incoming photosynthetically active radiation absorbed by canopy 1 The proportion of incident radiation that passes through a specific canopy layer without being absorbed or scattered, reaching lower canopy levels. This radiation transmission fraction determines light availability for understory vegetation and influences vertical light gradients within forest ecosystems. TAU_RadThru CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Fraction of radiation transmitted by canopy layer 1 The proportion of incident solar radiation that is intercepted by a specific canopy layer through absorption or scattering processes. This radiation interception fraction depends on leaf area index, leaf angle distribution, and optical properties, controlling photosynthetic capacity and microclimate conditions within multilayered vegetation canopies. TAU_DirectRTransmit CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Fraction of radiation intercepted by canopy layer 1 The proportion of incident shortwave radiation that reaches the ground surface after canopy attenuation through absorption and scattering. This ground-intercepted radiation fraction drives soil heating, surface evaporation, and understory plant photosynthesis, representing canopy transmittance effects on surface energy balance. FracSWRad2Grnd_col CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Fraction of radiation intercepted by ground surface 1 The amount of shortwave solar radiation reaching the ground surface after attenuation by canopy absorption and scattering processes. This ground-incident shortwave radiation drives soil heating, surface evaporation, and understory productivity, representing the transmitted solar energy available for soil-atmosphere interactions. RadSWGrnd_col CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Shortwave radiation incident on ground surface MJ.h-1 The thermal infrared radiation emitted by plant canopy structures due to their temperature, representing outgoing longwave energy flux. This canopy-emitted longwave radiation is a critical component of surface energy balance, influencing atmospheric heating and land-atmosphere energy exchange in climate models. LWRadCanGPrev_col surface-canopy_longwave_radiation ATS: surface-canopy_longwave_radiation. CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Longwave radiation emitted by canopy MJ.h-1 The thermal infrared radiation emitted by the ground surface due to soil temperature, representing a major pathway of surface heat loss to the atmosphere. This ground-emitted longwave radiation is fundamental to land surface energy balance and determines nighttime cooling rates in terrestrial ecosystem models. LWRadGrnd CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Longwave radiation emitted by ground surface MJ.m-2.h-1 The amount of water intercepted and temporarily stored on leaf surfaces, branches, and other canopy structures following precipitation events. This canopy water storage influences evaporation rates, transpiration dynamics, and precipitation partitioning, representing an important component of forest hydrological processes. WatHeldOnCanopy_col surface-canopy_surface_water ATS: surface-canopy_surface_water. CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy held water content m3/{grid} The amount of precipitation that falls directly onto plant canopy surfaces, representing the initial water input for canopy interception processes. This precipitation input drives canopy wetting, interception storage, and subsequent evaporation from wetted canopy surfaces in forest hydrological cycles. Prec2Canopy_col CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Precipitation to canopy MJ/{grid}/{step} The net amount of precipitation water intercepted and retained by plant canopy structures during precipitation events at the grid scale. This canopy precipitation interception reduces throughfall to the soil surface and represents water available for canopy evaporation in terrestrial hydrological models. PrecIntceptByCanopy_col CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Grid net precipitation water interception to canopy MJ/{grid}/{step} The energy flux associated with water phase change during canopy evaporation and transpiration processes, representing heat absorption during water vaporization. This latent heat flux is a major component of surface energy balance and determines canopy cooling effects in land-atmosphere energy exchange. EvapTransLHeat_pft surface-canopy_latent_heat ATS: surface-canopy_latent_heat, the column total returned to ATS by EcoSIM through Air_Heat_Latent_store_col. CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy latent heat flux MJ.h-1/{grid} The conductive and convective heat transfer between air and vegetation canopy driven by temperature differences, representing direct thermal energy exchange. This sensible heat flux influences canopy temperature regulation and microclimate conditions, contributing to surface energy balance in ecosystem models. HeatXAir2PCan_pft surface-canopy_sensible_heat ATS: surface-canopy_sensible_heat, the column total returned to ATS by EcoSIM through Air_Heat_Sens_store_col. CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Air to canopy sensible heat flux MJ.h-1/{grid} The rate of thermal energy accumulation or release in vegetation canopy biomass and associated water, representing temporal changes in canopy heat content. This heat storage flux accounts for canopy thermal inertia and influences ecosystem temperature dynamics and surface energy balance closure. HeatStorCanopy_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy storage heat flux MJ.h-1/{grid} The thermal energy content stored in vegetation canopy from the preceding time interval, providing initial conditions for current energy balance calculations. This previous heat storage represents canopy thermal memory and influences current temperature dynamics in ecosystem energy balance models. ENGYX_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy heat storage from previous time step MJ/{grid} The thermal energy required to raise canopy temperature per unit temperature change, determined by canopy biomass and water content. This volumetric heat capacity controls canopy temperature response to energy inputs and represents thermal inertia in ecosystem energy balance calculations. VHeatCapCanopy_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy heat capacity MJ.K-1/{grid} The total water potential in plant canopy tissues representing the driving force for water uptake from soil and water transport within plants. This total water potential indicates plant water status and hydraulic stress, influencing transpiration rates and photosynthetic performance in terrestrial ecosystem models. PSICanopy_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Plant canopy total water potential MPa The turgor pressure component of water potential in canopy leaves representing cellular hydrostatic pressure status. This turgor water potential regulates stomatal conductance through exponential response functions and controls gas exchange between leaves and atmosphere in plant hydraulic models. PSICanopyTurg_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Plant canopy turgor water potential MPa The osmotic component of water potential in plant canopy determined by solute concentrations including nonstructural carbon compounds. This osmotic water potential indicates plant osmotic adjustment capacity and drought tolerance, with lower values typically representing greater stress tolerance in arid environments. PSICanopyOsmo_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Plant canopy osmotic water potential MPa The water vapor flux from plant canopy to atmosphere through stomatal regulation and leaf-atmosphere vapor pressure gradients. This transpiration process represents the primary pathway of water loss from terrestrial ecosystems and couples carbon assimilation with water use in land surface models. Transpiration_pft surface-transpiration ATS: surface-transpiration, summed over plant functional types. CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy transpiration m3.h-1/{grid} The water vapor flux from wetted canopy surfaces to atmosphere expressed as a negative value indicating moisture loss from the canopy system. This evaporation includes both transpiration through stomata and evaporation from intercepted water on leaf and stem surfaces following precipitation events. VapXAir2Canopy_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Negative of canopy evaporation m2.h-1/{grid} The water content incorporated within canopy biomass tissues representing the structural and metabolic water requirements for plant growth. This biomass-associated water quantifies plant water demand beyond transpiration and represents water sequestration in expanding plant tissues during growth processes. CanopyBiomWater_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy water content associated with dry matter m3/{grid} The total water content associated with canopy biomass at the beginning of a numerical integration time step. This initial canopy water mass provides the starting condition for calculating water balance changes due to transpiration, growth, and senescence processes. CanopyWaterMassBeg_col CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy water before mass balance check m3/{grid} The total water content associated with canopy biomass at the end of a numerical integration time step. This final canopy water mass, compared with initial values, quantifies net water exchange between atmosphere and plant due to biomass changes and growth processes. CanopyWaterMassEnd_col CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy water at mass balance check m3/{grid} This variable compute the heat loss resulting from the loss of canopy biomass due to disturbances, e.g. harvest, fire, grazing, etc. It is an important component of energy conservation of EcoISM. HeatCanopy2Dist_col CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy heat content loss to disturbance MJ/{grid} This variable compute the water loss resulting from the loss of canopy biomass due to disturbances, e.g. harvest, fire, grazing, etc. It is an important component of water mass conservation of EcoISM. QCanopyWat2Dist_col CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy water loss to disturbance m3.h-1/{grid} This variable indicates the total water-air exchange due to evaporation from canopy held water and transpiration of water that plant take up from the soil. It is an important component of the ecosystem water cycling. QVegET_col surface-evapotranspiration ATS: surface-evapotranspiration. CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total canopy evaporation + transpiration m3.h-1/{grid} Total canopy evaporation (VapXAir2CanG) is the sum of all forms of evaporation from the canopy, including wet canopy evaporation (evaporation of intercept rainfall), cuticular transpiration (water vapor loss through plant leaf cuticle), and lenticular transpiration (evaporation from leaf surface through stomata or pores). It is a key element in the water cycle and influences the energy balance and climate of a region. Canopy evaporation can be influenced by factors like the type of vegetation, leaf surface characteristics, environmental conditions (temperature, humidity), and regional rainfall patterns. VapXAir2Canopy_col surface-evaporation_canopy ATS: surface-evaporation_canopy, summed over plant functional types. CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total canopy evaporation m3/{grid} The total thermal energy stored in canopy space including canopy air, vegetation biomass, and intercepted water components. This total heat content represents the thermal energy reservoir of the canopy system and is fundamental for ecosystem energy cycling and temperature regulation in terrestrial models. CanopyHeatStor_col CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total canopy heat content MJ/{grid} The net change in total thermal energy stored in the canopy between consecutive numerical time steps, representing temporal heat storage dynamics. This canopy heat flux quantifies the rate of thermal energy accumulation or loss and is essential for plant-atmosphere energy exchange modeling. HeatFlx2Canopy_col CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total canopy heat flux MJ.h-1/{grid} The total amount of water contained within canopy dry matter including structural water in plant tissues and metabolic water pools. This water content represents the total canopy water storage capacity and influences ecosystem water cycling and plant hydraulic functioning. CanopyWat_col CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total canopy water content stored in dry matter m3/{grid} The total longwave thermal infrared radiation emitted by plant canopy calculated using Stefan-Boltzmann law based on canopy temperature. This total longwave emission is essential for canopy energy balance closure and represents thermal energy loss from vegetation to the atmosphere. LWRadCanG_col CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total canopy longwave emission MJ.h-1/{grid} The fraction of incident shortwave solar radiation reflected by vegetation canopy surfaces back to the atmosphere. This dimensionless canopy albedo depends on leaf optical properties, canopy architecture, and solar angle, determining surface reflectance characteristics in Earth system energy balance calculations. RadSWLeafAlbedo_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy shortwave albedo 1 The fraction of incident shortwave radiation that passes through plant canopy after accounting for absorption and reflection processes. This dimensionless transmissivity parameter quantifies canopy transparency and determines radiation availability for understory vegetation and soil surface heating. RadSWLeafTransmis_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy shortwave transmissivity 1 The rate of precipitation water interception by plant canopy structures during precipitation events, representing water input to canopy storage pools. This water flux supports subsequent canopy evaporation processes and represents a key component of canopy-atmosphere water exchange in forest hydrology. PrecIntcptByCanopy_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Water flux into plant canopy m3.h-1/{grid} The canopy temperature in Kelvin following iterative solution of energy and water exchange between plant canopy and atmospheric air. This converged temperature represents the equilibrium canopy thermal state and determines radiative emission and sensible heat fluxes in energy balance calculations. TKC_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy temperature after energy iteration K The canopy temperature in Celsius following energy and water exchange calculations between plant canopy and atmospheric air. This temperature measurement represents the thermal state of vegetation and influences physiological processes including photosynthesis, respiration, and transpiration rates. TdegCCanopy_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy temperature Cel The temporal variation in canopy temperature over a specific time period, representing thermal response to environmental forcing and energy balance changes. This temperature change affects multiple physiological processes and reflects canopy adaptation to varying weather conditions, solar radiation, and plant water status. DeltaTKC_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Change in canopy temperature K The intermediate canopy temperature in Kelvin during iterative numerical computation of canopy energy balance closure. This temperature represents an intermediate state in the convergence process toward equilibrium canopy thermal conditions in ecosystem energy modeling. TKCanopy_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy temperature during canopy energy iteration K The amount of C4 carbon compounds consumed in bundle sheath cells to support C3 photosynthetic carbon fixation at a specific canopy node. This carbon pool represents the C4 to C3 carbon transfer mechanism in C4 photosynthesis where concentrated carbon dioxide supports efficient Rubisco activity. CPOOL3_node CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Bundle sheath C4 carbon product to support C3 photosynthesis during C4 photosynthesis on a leaf node g/{grid} The cumulative mass of all leaf tissue within a plant canopy or vegetation system, representing total foliar biomass. This total leaf mass is fundamental for quantifying canopy carbon storage, leaf area relationships, and photosynthetic capacity in terrestrial ecosystem energy and carbon cycling models. tCanLeafC_cl CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) I think this is referring to the canopy Total leaf mass g/{grid} The proportional allocation of senescent plant material into different chemical litter pools including cellulose, lignin, protein, and carbohydrate fractions. This litter kinetic fraction determines decomposition rates and nutrient release patterns by defining the chemical quality and recalcitrance of plant litter inputs to soil. ElmAllocmat4Litr CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Litter kinetic fraction 1 The total mass of various chemical elements including carbon, nitrogen, and phosphorus contained in aboveground plant organs and structural tissues. This elemental composition quantifies shoot biomass stoichiometry and represents nutrient investment in aboveground plant structural components. ShootElms_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Shoot structural chemical element g/{grid} The mass of nonstructural carbon compounds including C3 and C4 sugars synthesized through C4 photosynthesis and available for conversion to structural carbon during plant growth. This carbon pool represents intermediate photosynthetic products and mobile carbon reserves in C4 plant branches. C4PhotoShootNonstC_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) C4 specific nonstructural shoot carbon in branch g{C}/{grid} This vector variable summarizes mass of total chemical elements that are associated with the structural components of aboveground plant organs. It excludes nonstructural storage of chemical elements, and is a measure of aboveground plant biomass. ShootStrutElms_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) These are special classes - move to their own branch Canopy shoot chemical element g/{grid} This vector variable quantifies the amount of chemical elements in the structural component of leaf. This variable is an important indicator of aboveground canopy size. LeafStrutElms_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy leaf chemical element g/{grid} This vector variable quantifies the amount of chemical elements in the structural component of petiole. This variable is an important indicator of aboveground canopy size. PetoleStrutElms_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy sheath chemical element g/{grid} This vector variable quantifies the amount of chemical elements in the structural component of stalk. This variable is an important indicator of aboveground canopy size. StalkStrutElms_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy stalk chemical element g/{grid} The total mass of chemical elements stored in stalk reserve pools including carbon, nitrogen, and phosphorus available for remobilization during plant growth and reproduction. This reserve element pool represents stored nutrients and energy that can be mobilized to support reproductive development and stress response. StalkRsrvElms_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy reserve chemical element g/{grid} The total mass of chemical elements comprising the structural components of plant husks, representing elemental investment in protective reproductive structures. This husk elemental content quantifies nutrient allocation to reproductive organ protection and contributes to total aboveground biomass accounting. HuskStrutElms_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy husk chemical element g/{grid} The total mass of chemical elements contained in plant ear structural components, representing elemental investment in reproductive organ development. This ear elemental content quantifies nutrient allocation to grain-bearing structures and indicates reproductive biomass in agricultural and natural ecosystems. EarStrutElms_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy ear chemical element g/{grid} The total mass of chemical elements incorporated into grain structural components, representing elemental investment in seed and reproductive output. This grain elemental content quantifies nutrient allocation to reproductive success and determines harvestable biomass quality in agricultural productivity assessments. GrainStrutElms_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy grain chemical element g/{grid} The total carbon mass contained in combined leaf blade and sheath tissues within plant canopies, representing photosynthetic and structural carbon investment. This combined leaf and sheath carbon quantifies the primary photosynthetic biomass component and is fundamental for terrestrial carbon cycling and vegetation productivity modeling. CanopyLeafShethC_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Plant canopy leaf + sheath carbon g{C}/{grid} The total leaf surface area within a specific vertical layer of the vegetation canopy, determining light interception and gas exchange capacity. This layer-specific leaf area controls photosynthetic potential, evapotranspiration rates, and energy balance within multilayered canopy systems in terrestrial ecosystem models. CanopyLeafAreaZ_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy layer leaf area m2/{grid} The net balance between carbon dioxide uptake through photosynthesis and carbon dioxide release through respiration and other processes at the canopy scale. This net carbon dioxide exchange quantifies ecosystem carbon sequestration capacity and represents the fundamental carbon balance for specific plant functional types in Earth system models. CO2NetFix_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy net carbon dioxide exchange g.h-1/{grid} The carbon mass stored in leaf tissues within a specific canopy layer, including both living biomass and senescent material. This layer-specific leaf carbon represents vertical distribution of photosynthetic capacity and carbon storage, influencing canopy-scale carbon balance and productivity in terrestrial ecosystem models. CanopyLeafCLyr_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy layer leaf carbon g/{grid} The mass of mobile chemical elements stored in canopy tissues as reserves for maintenance and growth processes, including nonstructural carbon, nitrogen, and phosphorus pools. These nonstructural elements represent metabolically active nutrient reserves that support aboveground plant organ development and stress response. CanopyNonstElms_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy nonstructural chemical element g/{grid} Mass of a nonstructural chemical element in the canopy of a plant functional type per unit mass of canopy leaf and sheath carbon. CanopyNonstElmConc_pft CanopyDataType.txt Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), from the EcoSIM source, issue #109 EcoSIM computes CanopyNonstElmConc_pft in PlantPhenolMod.F90 as CanopyNonstElms_pft divided by CanopyLeafSheathC_pft, for carbon, nitrogen and phosphorus, and bounds it between 0 and 1; the [g d-2] in its declaration is wrong (issue #109). UptakesMod.F90 sums the three to set canopy osmotic and turgor pressure. Canopy nonstructural chemical element concentration g.g-1{C} The total cross-sectional area of plant stems within a specific vertical canopy layer, representing conducting tissue surface area for water and nutrient transport. This stem area provides mechanical support for aboveground biomass and determines hydraulic conductance capacity within multilayered canopy architecture. CanopyStemAreaZ_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Plant canopy layer stem area m2/{grid} The mass of nonstructural chemical elements contained in nitrogen-fixing nodule bacteria associated with canopy root systems. This nodule elemental content indicates the growth status and metabolic activity of nitrogen-fixing symbionts that contribute to ecosystem nitrogen input. CanopyNodulNonstElms_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy nodule nonstructural chemical element g/{grid} The total chemical elemental biomass of nitrogen-fixing nodule bacteria including carbon, nitrogen, and phosphorus content. This nodule biomass represents the structural investment in nitrogen fixation symbionts and indicates the host plant's atmospheric nitrogen fixation capacity. CanopyNodulElms_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy nodule chemical elemental biomass g/{grid} The carbon mass contained in actively conducting sapwood tissue within tree branches, representing living wood biomass involved in water and nutrient transport. This sapwood carbon is essential for hydraulic function and contributes to wood product calculations and tree ring formation modeling. SapwoodBiomassC_brch All the below refer to plant parts, which should be "measured_in" and refer to the PO. CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Branch sapwood carbon g/{grid} The mass of mobile chemical elements stored in branch tissues as reserves for maintenance and growth of branch-associated organs. These nonstructural elements are accumulated through photosynthesis and nutrient assimilation and are depleted through respiration and growth processes. CanopyNonstElms_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Branch nonstructural chemical element g/{grid} The total carbon mass contained in leaf blade and sheath tissues associated with a specific plant branch. This branch-level foliar carbon represents the photosynthetic biomass and carbon storage within individual branch units of the canopy architecture. LeafPetolBiomassC_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Plant branch leaf + sheath carbon g/{grid} Branch shoot C refers to the amount of carbon stored in the branches and shoots of a plant or tree. This is an important measure in studies of carbon sequestration and the carbon cycle, as plants and trees play a vital role in absorbing CO2 from the atmosphere. ShootStrutElms_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Branch shoot carbon g/{grid} It records the amount of structural biomass of leaves over a branch in the canopy. It is an indicator plant canopy size. LeafStrutElms_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Does this hold various chemical elements, similar to the COMO microtype (molecule from chebi) that points to ChEBI? Branch leaf chemical element g/{grid} The amount of each chemical element in the structural sheath tissues of a plant branch in the grid cell, representing the mineral nutrient content of these structural components. This parameter is important for understanding nutrient allocation patterns in woody plants, tissue quality for decomposition processes, and the role of sheath tissues in nutrient storage and translocation within tree and shrub canopies. PetolShethStrutElms_brch PetoleStrutElms_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) EcoSIM now names this variable PetolShethStrutElms_brch, declared "branch sheath chemical element, [g d-2]" in CanopyDataType.F90 (issue #109). Vector? Branch sheath chemical element g/{grid} The amount of each chemical element in the structural stalk tissues of a plant branch in the grid cell, indicating the mineral nutrient content of woody support structures. This measurement is crucial for understanding how plants allocate nutrients to structural components, affects wood quality and decomposition rates, and influences carbon and nutrient cycling in forest ecosystems where woody biomass represents a major nutrient pool. StalkStrutElms_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Vector? Branch stalk chemical element g/{grid} The mass of chemical elements stored as reserves in branch stalk tissues, including carbon, nitrogen, and phosphorus available for remobilization. These branch reserves represent stored nutrients that can be mobilized to support reproductive development and stress response at the individual branch scale. StalkRsrvElms_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Vector? Branch reserve chemical element g/{grid} The mass of chemical elements comprising the structural components of husks associated with a specific branch, representing elemental investment in protective reproductive structures. This branch-level husk elemental content quantifies nutrient allocation to reproductive organ protection within individual branch architecture. HuskStrutElms_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Vector? Branch husk chemical element g/{grid} The mass of chemical elements contained in ear structural components associated with a specific branch, representing elemental investment in reproductive organ development. This branch-level ear elemental content quantifies nutrient allocation to grain-bearing structures within individual branch units. EarStrutElms_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Vector? Branch ear chemical element g/{grid} The mass of chemical elements incorporated into grain structural components produced by a specific branch, representing elemental investment in seed and reproductive output. This branch-level grain elemental content determines reproductive success and harvestable biomass quality at the individual branch scale. GrainStrutElms_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Vector? Branch grain chemical element g/{grid} Mass of a nonstructural chemical element in a branch per unit mass of the branch's leaf and sheath carbon. LeafPetoNonstElmConc_brch CanopyDataType.txt Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), from the EcoSIM source, issue #109 EcoSIM computes LeafPetoNonstElmConc_brch in PlantPhenolMod.F90 as CanopyNonstElms_brch divided by CanopyLeafSheathC_brch, for carbon, nitrogen and phosphorus, so the value is a mass ratio; the [g d-2] in its declaration is wrong (issue #109). StomatesMod.F90 reads all three. The branch counterpart of Canopy nonstructural chemical element concentration (BERVO:0000632). Branch nonstructural chemical element concentration g.g-1{C} The mass of nonstructural carbon compounds present in nitrogen-fixing nodules associated with specific branches of leguminous plants. This nodule nonstructural carbon represents metabolically active carbon pools supporting symbiotic nitrogen fixation processes and bacterial maintenance within branch-associated root nodules. CanopyNodulNonstElms_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Branch nodule nonstructural carbon g/{grid} The mass of chemical elements comprising the structural components of nitrogen-fixing nodules associated with specific branches. This nodule elemental content represents the mineral composition of symbiotic structures supporting atmospheric nitrogen fixation at the individual branch scale. CanopyNodulStrutElms_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Vector? Branch nodule chemical element g/{grid} The mass of chemical elements that can be remobilized from structural sheath tissues within specific branches during senescence or nutrient stress. This remobilizable elemental pool represents nutrients that can be translocated to support other plant organs during periods of resource limitation. PetioleChemElmRemob_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Vector? Branch sheath structural chemical element g/{grid} The mass of structural carbon compounds including cellulose and lignin contained in branch stalk tissues that provide mechanical support and rigidity. This structural carbon represents the investment in supportive framework components and contributes to long-term carbon storage in woody plant tissues. SenecStalkStrutElms_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Branch stalk structural carbon g/{grid} The mass of chemical elements that can be remobilized from structural leaf tissues within specific branches during senescence or resource limitation. This remobilizable leaf elemental pool represents nutrients that can be translocated from senescing leaves to support other plant functions. LeafChemElmRemob_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Vector? Branch leaf structural chemical element g/{grid} The total mass of chemical elements including carbon, nitrogen, and phosphorus contained in leaf tissues at specific canopy nodes within branches. This nodal leaf elemental content represents the mineral composition and nutrient investment in photosynthetic organs at discrete canopy positions. LeafElmntNode_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Leaf chemical element g/{grid} The total mass of chemical elements contained in sheath tissues at specific canopy nodes, representing elemental composition of supportive leaf structures. This sheath elemental content quantifies nutrient allocation to protective and supportive leaf components within the canopy architecture. PetioleElmntNode_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Sheath chemical element g/{grid} The mass of chemical elements contained in internode structural tissues between leaf attachment points on branches. This internode elemental content represents nutrient investment in stem segments that provide spacing and mechanical support between leaves within branch architecture. InternodeStrutElms_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Internode chemical element g/{grid} The mass of chemical elements contained in leaf tissues organized by specific canopy layers and nodes within branch structures. This layer-specific leaf elemental content represents the vertical distribution of nutrients in photosynthetic tissues throughout the canopy profile. LeafElmsByLayerNode_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Layer leaf chemical element g/{grid} The total leaf surface area within a specific canopy layer, determining light interception capacity and gas exchange potential at that vertical position. This layer-specific leaf area controls photosynthetic activity, transpiration rates, and atmospheric gas exchange within vertically stratified canopy systems. CanopyLeafArea_lnode CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Layer leaf area m2/{grid} The carbon mass contained in protein compounds within leaf tissues at specific canopy layers, representing investment in photosynthetic enzymes and metabolic machinery. This protein carbon content indicates photosynthetic capacity and nitrogen utilization efficiency within different canopy strata. LeafProteinCNode_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Layer leaf protein carbon g/{grid} The carbon content associated with protein compounds within plant sheath tissues organized in distinct canopy layers, representing the structural and metabolic protein investment in protective leaf structures. This parameter is important for understanding nitrogen allocation patterns, tissue quality for herbivory and decomposition, and the role of sheath proteins in plant defense and resource storage strategies across different canopy positions in grassland and forest ecosystems. PetoleProteinCNode_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Layer sheath protein carbon g/{grid} Mass of nonstructural carbon in the canopy nodules of a plant functional type per unit mass of canopy leaf and sheath carbon. CanopyNoduleNonstCConc_pft NoduleNonstructCconc_pft CanopyDataType.txt Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), from the EcoSIM source, issue #109 EcoSIM, where the variable is now named CanopyNoduleNonstCConc_pft, computes it in PlantPhenolMod.F90 as the nodule nonstructural carbon in CanopyNodulNonstElms_pft divided by CanopyLeafSheathC_pft, bounds it between 0 and 1, and annotates it [gC (gC)-1]; the [g d-2] in its declaration is wrong (issue #109). Nodule nonstructural carbon concentration g{C}.g-1{C} Maximum grain C during grain fill refers to the maximum amount of carbon (C) allocated to the grain during the grain filling stage of a crop's growth cycle. This is a crucial component of plant growth and development, influencing crop yield and quality. It is an important parameter in crop and ecological modelling, providing insight into plant physiology and nutrient cycling. GrainSeedBiomCMean_brch CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Maximum grain carbon during grain fill g/{grid} The proportion of chemical elements contained within standing dead plant material relative to the total elemental pool in vegetation canopies. This measurement is essential for understanding nutrient cycling dynamics, decomposition processes, and the retention of essential elements in forest and grassland ecosystems following plant senescence. StandDeadKCompElms_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Standing dead chemical element fraction g/{grid} The mass of chemical elements contained in standing dead vegetation including senescent leaves, branches, and stems that remain attached to plants. This standing dead elemental content represents nutrients temporarily immobilized in senescing plant tissues before eventual litterfall and decomposition. StandDeadStrutElms_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Standing dead chemical element g/{grid} The mass of mobile chemical elements stored seasonally in plant tissues as reserves for periods of limited resource availability or high demand. These seasonal storage pools represent plant adaptive strategies for surviving unfavorable conditions and supporting rapid growth during favorable periods. SeasonalNonstElms_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Plant stored nonstructural chemical element g/{grid} The mass of nonstructural carbohydrate reserves present in seeds at planting time, providing energy for germination and early seedling establishment. These seed carbon reserves support initial growth processes until photosynthetic capacity is established and plants become autotrophic. SeedCPlanted_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Plant stored nonstructural carbon at planting g/{grid} The mean carbon content in shoot biomass averaged across a landscape, representing spatial variability in aboveground carbon storage. This landscape-scale average reflects heterogeneity in plant species composition, growth stages, and environmental conditions affecting terrestrial carbon cycling patterns. AvgCanopyBiomC2Graze_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Landscape average canopy shoot carbon g/{grid} The rate of carbon dioxide fixation when photosynthesis is limited by carbon dioxide concentration rather than light availability or Rubisco capacity. This carbon-limited carboxylation rate determines photosynthetic performance under low atmospheric carbon dioxide conditions and influences plant responses to carbon dioxide enrichment. CO2FixCL_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Carbon dioxide-limited carboxylation rate g{C}.h-1/{grid} The rate of carbon dioxide fixation when photosynthesis is limited by light availability rather than carbon dioxide concentration or enzyme capacity. This light-limited carboxylation rate determines photosynthetic performance under low irradiance conditions and controls carbon fixation in shaded canopy environments. CO2FixLL_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Light-limited carboxylation rate g{C}.h-1/{grid} The total carbon mass contained in all aboveground plant organs including leaves, stems, branches, and reproductive structures. This canopy biomass represents the total carbon investment in photosynthetic and structural tissues and is fundamental for quantifying terrestrial carbon storage capacity. CanopyMassC_pft CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Canopy biomass g{C}/{grid} The vertical elevation of landscape features above a reference datum, typically mean sea level, affecting temperature, pressure, and precipitation patterns. This altitude measurement influences atmospheric processes, species distribution, and topographic effects on climate, making it essential for accurate Earth system modeling. ALTIG Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) LandSurfDataType.txt Altitude of landscape m The characteristic height of soil surface irregularities at the beginning of a simulation period, affecting aerodynamic properties and wind profiles. This initial surface roughness influences momentum transfer, turbulent mixing, and wind shear calculations in land-atmosphere exchange models. SoilSurfRoughnesst0_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) LandSurfDataType.txt Initial soil surface roughness height m The effective height above the ground surface where wind speed theoretically becomes zero due to vegetation drag, representing canopy aerodynamic properties. This displacement height modifies logarithmic wind profiles and determines momentum transfer characteristics in vegetated surfaces. ZERO4PlantDisplace_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) LandSurfDataType.txt Zero plane displacement height m The characteristic height representing vegetation roughness effects on atmospheric turbulence and momentum transfer processes. This roughness height determines aerodynamic resistance and influences wind profiles, heat transfer, and mass exchange between vegetation and atmosphere. RoughHeight_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) LandSurfDataType.txt Canopy surface roughness height m The characteristic height of soil surface irregularities that affect surface water flow resistance and runoff velocity calculations. This roughness height influences hydraulic friction, flow detention time, and erosion processes in surface hydrology models. SoiSurfRoughness Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) LandSurfDataType.txt Soil surface roughness height for calculating runoff velocity m The height above ground surface at which wind speed measurements are taken for meteorological forcing data. This measurement height is crucial for scaling wind speeds to canopy reference heights and calculating aerodynamic resistances in land surface energy and water balance models. WindMesureHeight_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) LandSurfDataType.txt Wind speed measurement height m The mean elevation of terrain within a computational grid cell, representing topographic variation effects on atmospheric and hydrological processes. This grid cell altitude influences temperature lapse rates, precipitation patterns, atmospheric pressure, and surface runoff characteristics in spatially explicit Earth system models. ALT_col surface-elevation ATS: surface-elevation [m]. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) LandSurfDataType.txt more like relative altitude Altitude of grid cell m The resistance to heat and moisture transfer through the atmospheric boundary layer under conditions of neutral thermal stability. This isothermal resistance quantifies the impedance to scalar transport and mixing processes, influencing surface energy balance and land-atmosphere exchange calculations. AbvCanopyBndlResist_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) LandSurfDataType.txt Isothermal boundary layer resistance h.m-1 The bulk Richardson number used to determine atmospheric stability effects on turbulent transport and boundary layer resistance calculations. This dimensionless stability parameter quantifies buoyancy effects relative to wind shear and modifies momentum and scalar transfer coefficients. RIB_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) LandSurfDataType.txt Richardson number for calculating boundary layer resistance 1 The value obtained from the mathematical function of sine applied to the gradient or slope. It is often used in various calculations in earth system sciences, such as those related to hill slopes, flow directions, and solar radiation. SineGrndSlope_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) LandSurfDataType.txt Sine of slope 1 The cosine of the angle between the land surface and the horizontal plane, providing a dimensionless measure of slope steepness that ranges from 0 for vertical surfaces to 1 for flat terrain. This parameter is fundamental for calculating solar radiation receipt, surface energy balance, and hydrological processes including runoff generation and erosion potential in topographically complex terrain. CosineGrndSlope_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) LandSurfDataType.txt Cosine of slope 1 The compass direction that a sloped surface faces, measured in degrees from north and indicating the orientation of terrain aspects across landscapes. This parameter controls solar radiation exposure patterns, influences local climate conditions, and affects vegetation distribution, soil moisture, and ecological processes in mountainous and hilly terrain. GroundSurfAzimuth_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) LandSurfDataType.txt Azimuth of slope deg The vertical distance of a land surface point above a reference datum such as mean sea level, representing elevation in meters or feet across terrestrial landscapes. This parameter is fundamental for understanding atmospheric pressure variations, temperature gradients, precipitation patterns, and biodiversity distributions along elevational gradients in mountain and highland ecosystems. ALTZ_col LOCATION_ELEV elevation CHESS: Elevation, Elevation_m, Topographical_Elevation. AmeriFlux BADM variable name: LOCATION_ELEV. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) How does this differ from the concept term? LandSurfDataType.txt like in "above mean sea level" Measurement of altitude m The angle of inclination of land surface relative to horizontal, expressed in degrees, affecting water flow, erosion, and solar radiation receipt. This topographic slope influences surface runoff velocity, soil stability, microclimate conditions, and vegetation establishment patterns in terrestrial ecosystem models. SL_col surface-slope_magnitude ATS: surface-slope_magnitude [-], the dimensionless magnitude of the surface gradient rather than an angle. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) How does this differ from the concept term? LandSurfDataType.txt Measurement of slope deg The compass direction that a land surface faces, expressed in degrees from north, determining solar radiation exposure and microclimate conditions. This topographic aspect affects temperature distribution, moisture patterns, vegetation growth, and ecosystem dynamics through differential solar heating and drying effects. ASP_col surface-aspect ATS: surface-aspect. ODM2 variable name concept "Aspect": Aspect identifies the downslope direction of the maximum rate of change in value from each raster DEM cell to its neighbors. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) LandSurfDataType.txt Aspect deg The proportion of chemical elements from senescing shoot leaf tissues that is allocated to woody versus fine litter pools during decomposition. This allocation fraction determines the residence time and decomposition rate of leaf-derived nutrients in soil carbon and nitrogen cycling processes. FracShootLeafElmAlloc2Litr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Fraction of shoot leaf element allocation to woody/fine litter 1 The proportion of chemical elements from senescing shoot stalk tissues that is allocated to woody versus fine litter pools during decomposition. This allocation fraction controls the partitioning of stem-derived nutrients between slow-decomposing woody debris and rapidly cycling fine litter components. FracShootStalkElmAlloc2Litr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Fraction of shoot stalk element allocation to woody/fine litter 1 The proportion of chemical elements from senescing root tissues that is allocated to woody versus fine litter pools during belowground decomposition. This allocation fraction determines the distribution of root-derived nutrients between recalcitrant woody root debris and labile fine root litter. FracRootElmAlloc2Litr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Fraction of root element allocation to woody/fine litter 1 The proportion of chemical elements from senescing root stalk tissues that is allocated to woody versus fine litter pools during belowground decomposition. This allocation fraction controls the partitioning of structural root-derived nutrients between persistent woody debris and rapidly cycling fine organic matter. FracRootStalkElmAlloc2Litr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Fraction of root stalk element allocation to woody/fine litter 1 The proportional allocation of photosynthetic carbon to different plant organs within an individual branch, determining resource distribution patterns. This dimensionless partitioning coefficient controls carbon investment in leaves, stems, and reproductive structures, affecting branch-level growth and productivity. PARTS_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Carbon partitioning coefficient in a branch 1 The total cross-sectional area of stem tissues within a specific canopy layer and branch combination, representing conducting tissue surface area. This layer-specific stem area determines hydraulic conductance capacity and mechanical support within vertically stratified canopy architecture. CanopyStalkArea_lbrch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Canopy stem layer area m2/{grid} The total surface area of all leaf tissues within a plant functional type canopy, determining light interception and photosynthetic capacity. This canopy leaf area controls carbon assimilation potential, transpiration rates, and energy balance in terrestrial ecosystem productivity models. CanopyLeafArea_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Canopy leaf area m2/{grid} The combined surface area of leaf and stem tissues within a plant functional type canopy, representing total aboveground plant surface area. This combined area affects light interception, photosynthesis, evapotranspiration, and carbon uptake processes in Earth system vegetation models. LeafStalkArea_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Plant canopy leaf + stem/stalk area m2/{grid} The total cross-sectional area of stem tissues within a plant functional type, representing conducting tissue surface area for water and nutrient transport. This stem area measurement indicates hydraulic capacity, structural support, and biomass allocation to supportive tissues in plant growth and productivity assessments. CanopyStemArea_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Plant stem area m2/{grid} The vertical extent of vegetation canopy for a specific plant functional type, representing the maximum height of photosynthetic and structural tissues. This canopy height determines light competition dynamics, aerodynamic properties, and vertical stratification in ecosystem productivity and energy balance models. CanopyHeight_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Pft canopy height m The cumulative surface area of all leaf tissues within a grid cell and canopy layer, determining photosynthetic capacity and gas exchange potential. This total leaf area controls light interception efficiency, carbon dioxide uptake, and oxygen release, representing the primary interface for ecosystem-atmosphere interactions. CanopyLeafAareZ_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Total leaf area m2/{grid} The combined cross-sectional area of all stem and branch tissues within a canopy layer, representing structural and conducting tissue surface area. This total stem area influences water transport capacity, mechanical support, carbon storage, and biomass productivity within vertically stratified forest ecosystems. CanopyStemAareZ_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Total stem area m2/{grid} The total leaf surface area within a computational grid cell, representing spatially aggregated photosynthetic capacity for Earth system modeling. This grid-level leaf area determines carbon dioxide exchange, water vapor fluxes, and energy balance between land surface and atmosphere, providing the foundation for primary productivity and evapotranspiration calculations. CanopyLeafArea_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Grid level plant canopy leaf area m2/{grid} The combined cross-sectional area of all stem and trunk tissues within a vegetation canopy system, representing total conducting and structural tissue surface area. This total stem area quantifies hydraulic capacity, biomass production potential, and transpiration surface area, influencing energy and water exchange in terrestrial ecosystem models. StemArea_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Total canopy stem area m2/{grid} The total combined surface area of leaf and stalk tissues aggregated across all vegetation within a computational grid cell. This grid-level canopy area represents the complete aboveground plant surface area available for photosynthesis, transpiration, and land-atmosphere interactions in spatially explicit Earth system models. LeafStalkArea_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Canopy area of combined over the grid m2/{grid} The soil layer number corresponding to the depth at which seeds or seedlings are planted, determining initial root zone characteristics. This planting depth layer affects seedling establishment success, early root development, and access to soil water and nutrients in agricultural and ecological systems. NGTopRootLayer_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Soil layer at planting depth m The soil depth at which seeds are placed during planting operations, affecting germination success and seedling establishment rates. This planting depth varies by seed size and species requirements, influencing emergence timing, root development, and early plant growth in agricultural and restoration practices. PlantinDepz_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Planting depth m The soil depth at which seeds are placed for germination, critical for successful plant establishment and growth. This seeding depth affects seed access to moisture, oxygen, and appropriate temperature conditions, determining germination rates and seedling survival in natural and managed ecosystems. SeedDepth_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Seeding depth m The three-dimensional space occupied by individual seeds, representing seed size and potential energy reserves for germination and early growth. This seed volume influences dispersal characteristics, germination success, and seedling establishment capacity, affecting plant reproductive strategies and ecosystem establishment patterns. SeedVolumeMean_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Seed volume m3 The maximum linear dimension of seeds measured along their longest axis, important for species identification and seed quality assessment. This seed length measurement influences dispersal mechanisms, germination requirements, and seedling establishment success, representing genetic and environmental factors affecting reproductive strategies. SeedMeanLen_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Seed length m The total exterior surface area of individual seeds, influencing water uptake, gas exchange, and soil contact during germination. This seed surface area affects germination rates, dispersal characteristics, and seed-environment interactions, representing morphological adaptations for establishment success in different habitats. SeedAreaMean_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Seed surface area m2 The vertical distance of cotyledon structures above the soil surface during early seedling development. This cotyledon height represents the hypocotyl extension and influences early light capture capacity, seedling competition, and establishment success in varying light environments. HypoctoHeight_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Cotyledon height m The maximum vertical extent of vegetation canopy averaged across a computational grid cell, representing ecosystem structural characteristics. This grid-averaged canopy height influences aerodynamic properties, light interception, and habitat structure in spatially explicit terrestrial ecosystem models. CanopyHeight_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Canopy height over grid m The vertical extent of vegetation within specific canopy layers, representing vertical stratification of plant tissues. This layer-specific canopy height determines light penetration patterns, microclimate gradients, and habitat structure within multilayered forest ecosystems. CanopyHeightZ_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Canopy layer height m The angular deviation of branches from the main stem axis, determining canopy architecture and light distribution patterns. This branching angle affects light interception efficiency, crown structure, and competitive interactions, influencing photosynthetic capacity and carbon cycling in forest ecosystems. BranchAngle_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Branching angle deg The angular orientation of leaf sheaths relative to stem or branch axes, affecting canopy structure and light interception patterns. This sheath angle influences transpiration rates, carbon assimilation efficiency, and competitive positioning within canopy light environments. PetioleAngle_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Sheath angle deg The characteristic height representing canopy surface irregularities that affect atmospheric turbulence and momentum transfer processes. This roughness height influences wind speed profiles, aerodynamic resistance, and gas exchange between vegetation and atmosphere in land surface models. ReistanceCanopy_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Canopy roughness height m The effective vertical extent of canopy that actively participates in water absorption from soil and atmosphere. This effective height for water uptake represents the canopy zone with functional root-soil connections and influences transpiration capacity and drought response in terrestrial ecosystems. CanopyHeight4WatUptake_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Effective canopy height for water uptake m The total surface area of leaf tissues at specific nodes within branch structures, determining photosynthetic capacity and gas exchange potential. This nodal leaf area influences light interception, carbon assimilation, and transpiration rates, representing the primary interface for plant-atmosphere interactions at the branch level. LeafNodeArea_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Leaf area m2/{grid} The vertical length of leaf sheath structures that enclose and support stem segments at specific canopy nodes. This sheath height provides mechanical support and protection to stems, influencing plant structural integrity and resource transport efficiency within branch architecture. PetoleLensNode_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Sheath height m The vertical distance between consecutive leaf attachment points on living branch segments, representing stem elongation patterns. This internode height determines leaf spacing, light penetration, and canopy architecture, affecting competitive ability and resource capture efficiency. LiveInterNodeHight_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Live internode height m The total surface area of living leaf tissues associated with individual branches, determining photosynthetic capacity and transpiration potential at the branch scale. This branch leaf area influences primary productivity, energy exchange, and water fluxes, varying with plant functional type and environmental conditions. LeafAreaLive_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Branch leaf area m2/{grid} The vertical distance from tree base to branch attachment point, representing canopy structural characteristics and growth patterns. This branch height influences light competition, crown architecture, and forest structure, affecting carbon dynamics and ecosystem productivity. CanPBranchHeight Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Branch height m The total count of grains or seeds produced on individual branches, representing reproductive output at the branch scale. This grain number determines yield potential and reproductive success, influenced by resource availability and environmental conditions in agricultural and natural systems. SeedNumSet_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Branch grain number /{grid} The maximum number of grains that could develop on a branch under optimal growing conditions, representing reproductive capacity potential. This potential grain number indicates genetic limits and environmental constraints on reproductive output, influencing yield forecasting and breeding strategies. PotentialSeedSites_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Branch potential grain number /{grid} The total count of grains or seeds produced within the entire plant canopy, representing whole-plant reproductive output and yield potential. This canopy grain number affects crop yield estimates and is fundamental for agricultural productivity assessments and ecological energy transfer calculations. CanopySeedNum_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Canopy grain number /{grid} The number of individual plants in the grid cell, representing vegetation density and competitive interactions within plant communities. This plant population density influences resource competition, growth rates, and ecosystem productivity in both natural and managed systems. PlantPopulation_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Plant population /{grid} The vertical distance between consecutive nodes on senescent or dead branch segments, representing structural remnants after tissue death. This dead internode height contributes to standing dead biomass and affects canopy structure, light penetration, and decomposition processes. InternodeHeightDead_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Dead internode height m The highest nitrogen to carbon mass ratio achievable in leaf tissues under optimal nutrient conditions, representing maximum photosynthetic capacity potential. This maximum leaf nitrogen to carbon ratio indicates plant nutritional status and growth potential, with higher ratios typically associated with enhanced photosynthesis and productivity. CNLF_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) I like these PlantTraitDataType.txt Maximum leaf nitrogen to carbon ratio g.g-1 The highest phosphorus to carbon mass ratio achievable in leaf tissues under optimal nutrient conditions, representing maximum phosphorus investment in photosynthetic machinery. This maximum leaf phosphorus to carbon ratio is critical for understanding nutrient balance and metabolic capacity in photosynthetic tissues. CPLF_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Maximum leaf phosphorus to carbon ratio g.g-1 The nitrogen to carbon mass ratio in leaf sheath tissues, representing nutrient allocation to supportive and protective plant structures. This sheath nitrogen to carbon ratio influences structural protein content and affects decomposition rates when sheaths senesce. CNSHE_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Sheath nitrogen to carbon ratio g.g-1 The nitrogen to carbon mass ratio in stem or stalk tissues, representing nutrient investment in structural and conducting plant organs. This stalk nitrogen to carbon ratio affects tissue quality, decomposition rates, and nutrient cycling when plant materials enter soil organic matter pools. rNCStalk_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Stalk nitrogen to carbon ratio g.g-1 The nitrogen to carbon mass ratio in plant reserve tissues that store nutrients for remobilization during growth or stress periods. This reserve nitrogen to carbon ratio represents the quality of stored nutrients and affects plant resilience and recovery capacity. rNCReserve_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Reserve nitrogen to carbon ratio g.g-1 The nitrogen to carbon mass ratio in protective husk tissues that enclose seeds or grains, representing nutrient allocation to reproductive protection structures. This husk nitrogen to carbon ratio affects tissue degradation rates and nutrient release during decomposition of crop residues. rNCHusk_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Husk nitrogen to carbon ratio g.g-1 The nitrogen to carbon mass ratio in ear tissues that support grain development, representing nutrient investment in reproductive support structures. This ear nitrogen to carbon ratio influences reproductive capacity and affects nutrient cycling when ear tissues decompose. rNCEar_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Ear nitrogen to carbon ratio g.g-1 The nitrogen to carbon mass ratio in grain tissues, representing nutritional quality and protein content of harvested seeds. This grain nitrogen to carbon ratio influences crop nutritional value, seed quality, and nutrient cycling in agricultural systems, affecting both human nutrition and soil fertility management. CNGR_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Grain nitrogen to carbon ratio g.g-1 The nitrogen to carbon mass ratio in root nodule tissues containing nitrogen-fixing bacteria, representing the stoichiometry of symbiotic nitrogen fixation structures. This nodule nitrogen to carbon ratio reflects the effectiveness of biological nitrogen fixation and affects soil nitrogen inputs. NodulerNC_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Nodule nitrogen to carbon ratio g.g-1 The mass ratio of phosphorus to carbon in plant sheath tissues, representing the nutrient composition and stoichiometric balance in protective leaf structures. This ratio is important for understanding nutrient allocation strategies, tissue quality for decomposition, and plant adaptation to phosphorus-limited environments in grassland and agricultural ecosystems. CPSHE_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) PlantTraitDataType.txt Sheath phosphorus to carbon ratio g.g-1 The mass ratio of phosphorus to carbon in plant stem or stalk tissues, indicating the nutrient content and structural composition of supportive plant organs. This parameter influences plant growth efficiency, tissue decomposition rates, and nutrient cycling patterns in forest and grassland ecosystems where stem biomass represents a significant carbon and nutrient pool. rPCStalk_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) PlantTraitDataType.txt Stalk phosphorus to carbon ratio g.g-1 The mass ratio of phosphorus to carbon in plant reserve tissues such as storage organs, seeds, or specialized structures where nutrients are accumulated for future growth. This ratio reflects plant investment strategies in nutrient storage and is crucial for understanding reproductive success, seedling establishment, and ecosystem nutrient dynamics during periods of active growth or stress recovery. rPCReserve_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) PlantTraitDataType.txt Reserve phosphorus to carbon ratio g.g-1 The phosphorus to carbon mass ratio in a plant husk. This quantity reflects the nutrient status of the plant and has important implications for the return of these elements to the soil when the plant dies and decomposes. rPCHusk_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Husk phosphorus to carbon ratio g.g-1 The phosphorus to carbon mass ratio in ear tissues that support reproductive development, representing nutrient allocation to reproductive support structures. This ear phosphorus to carbon ratio affects reproductive success and influences nutrient cycling when ear tissues decompose. rPCEar_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Ear phosphorus to carbon ratio g.g-1 The phosphorus to carbon mass ratio in grain tissues, representing the nutritional quality and mineral content of harvested seeds. This grain phosphorus to carbon ratio influences crop nutritional value and affects phosphorus cycling in agricultural systems through harvest and residue management. CPGR_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Grain phosphorus to carbon ratio g.g-1 The phosphorus to carbon mass ratio in root nodule tissues containing nitrogen-fixing bacteria, representing the phosphorus requirements of biological nitrogen fixation. This nodule phosphorus to carbon ratio affects the efficiency of symbiotic nitrogen fixation and phosphorus cycling in soils. NodulerPC_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Nodule phosphorus to carbon ratio g.g-1 The carbon to nitrogen mass ratio in nonstructural plant compounds that can be redistributed within the plant, including sugars, amino acids, and lipids not bound in structural tissues. This carbon to nitrogen ratio in remobilizable nonstructural biomass affects plant resource allocation and stress response capacity. rCNNonstRemob_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt C:N ratio in remobilizable nonstructural biomass g.g-1 The carbon to phosphorus mass ratio in nonstructural plant compounds that can be redistributed within the plant, representing the stoichiometry of mobile nutrient reserves. This carbon to phosphorus ratio in remobilizable nonstructural biomass influences plant growth response and nutrient use efficiency under varying resource conditions. rCPNonstRemob_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt C:P ratio in remobilizable nonstructural biomass g.g-1 The osmotic potential of plant canopy tissues when total water potential equals zero megapascals, representing the solute concentration effects on water movement at water balance equilibrium. This canopy osmotic potential when canopy water potential equals zero megapascals is used to parameterize plant water stress responses and drought tolerance. CanOsmoPsi0pt_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Canopy osmotic potential when canopy water potential is zero MPa The critical air temperature that triggers autumn leaf senescence and cold hardening processes in deciduous plants, representing the thermal threshold for seasonal dormancy initiation. This threshold temperature for autumn leafoff and hardening affects growing season length and winter survival in temperate ecosystems. TC4LeafOff_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Threshold temperature for autumn leafoff/hardening Cel The temperature range to which a plant species is initially adapted at establishment or introduction to a new environment, representing the baseline thermal tolerance before acclimation. This initial plant thermal adaptation zone determines species survival probability and establishment success under changing climate conditions. PlantInitThermoAdaptZone Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Initial plant thermal adaptation zone NA The temperature range within which a plant species can survive and function effectively after acclimation processes, representing the realized thermal niche. This plant thermal adaptation zone influences species distribution patterns and ecosystem composition under climate variability. iPlantThermoAdaptZone_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Plant thermal adaptation zone NA A classification system for crop varieties based on relative time to physiological maturity and reproductive development, commonly used for soybeans and other agricultural species. This plant maturity group determines regional adaptability and growing season requirements for optimal yield and harvest timing. MatureGroup_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Plant maturity group NA A classification of plant varieties based on their maturity rate after environmental acclimation, representing adjusted developmental timing in response to local conditions. This acclimated plant maturity group influences phenological timing and yield optimization under specific climate conditions. MatureGroup_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Acclimated plant maturity group NA A classification of crop varieties based on their inherent maturity rate at planting before environmental acclimation, representing genetic potential for developmental timing. This initial plant maturity group determines base phenological characteristics and guides variety selection for specific growing regions. GROUPX_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Initial plant maturity group NA The number of individual plants per unit area at the beginning of a growing season or establishment period, representing planting density or natural recruitment density. This initial plant population affects resource competition, canopy development, and final biomass production in agricultural and natural ecosystems. PPI_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Initial plant population m-2 The carbon mass contained in dead but still standing woody vegetation at the beginning of a measurement period, representing an important component of forest carbon pools. This initial standing dead carbon serves as a baseline for tracking mortality effects on carbon cycling and decomposition processes. StandingDeadInitC_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Initial standing dead carbon g{C}.m-2 The count of plant functional types that are actively growing and contributing to ecosystem processes within a given area or community. This number of active plant functional types reflects ecosystem diversity and functional complexity in biogeochemical cycling models. NumActivePlants_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Number of active plant functional types 1 The total number of individual plants present in a defined area, representing overall plant density and community structure. This total plant population influences competition intensity, resource availability, and ecosystem carrying capacity for plant communities. PlantPopu_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Total plant population /{grid} The number of seeds planted or sown per unit area at the time of seeding, representing the initial potential plant density for crop establishment. This plant population at seeding determines stand establishment success and influences final plant density and yield potential. PPatSeeding_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Plant population at seeding m-2 The duration in hours when canopy water potential falls below critical thresholds, representing the accumulated time of water stress experienced by plant canopies. This canopy plant water stress indicator quantifies drought stress intensity and affects photosynthetic capacity and plant survival. HoursTooLowPsiCan_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Canopy plant water stress indicator, number of hours PSILT < PSILY 1 A measure of physiological stress in plants caused by oxygen deficiency or excess, typically occurring in waterlogged or poorly aerated soils. This plant oxygen stress indicator affects root respiration, nutrient uptake, and overall plant metabolism in terrestrial and wetland ecosystems. PlantO2Stress_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Plant oxygen stress indicator 1 A mathematical function describing the relationship between temperature and canopy growth rate, incorporating optimal, minimum, and maximum temperature thresholds for growth. This canopy temperature growth function is used in ecosystem models to simulate plant productivity responses to temperature variability and climate change. fTCanopyGroth_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Canopy temperature growth function Cel The temperature conditions within plant canopies that support optimal growth and development, representing the thermal environment for photosynthesis and metabolism. This canopy growth temperature influences carbon assimilation rates and biomass accumulation in terrestrial vegetation models. TCGroth_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Canopy growth temperature Cel K The biomass production efficiency of plant sheath tissues, representing the ratio of new sheath growth to resource investment over a given time period. This sheath growth yield affects plant structural support capacity and influences carbon allocation patterns in graminoid species. PetioleBiomGrowthYld_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Sheath growth yield g.g-1 The biomass production efficiency of plant stalk tissues, representing the conversion efficiency of resources into structural stem growth. This stalk growth yield influences plant height development and mechanical support capacity in terrestrial vegetation. StalkBiomGrowthYld_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Stalk growth yield g.g-1 The biomass production efficiency of plant reserve tissues, representing the conversion of photosynthates into storage compounds for future use. This reserve growth yield affects plant resilience during stress periods and influences seasonal resource allocation patterns. ReserveBiomGrowthYld_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Reserve growth yield g.g-1 The biomass production efficiency of plant husk tissues that protect developing seeds, representing the conversion of resources into protective reproductive structures. This husk growth yield affects seed protection quality and influences reproductive success under environmental stress conditions. HuskBiomGrowthYld_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Husk growth yield g.g-1 The biomass production efficiency of plant ear tissues that support grain development, representing resource allocation to reproductive support structures. This ear growth yield influences final grain yield potential and affects harvest index in cereal crops. EarBiomGrowthYld_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Ear growth yield g.g-1 The biomass production efficiency of grain tissues, representing the conversion of photosynthates into harvestable seed biomass per unit of resource investment. This grain growth yield determines crop productivity and harvest quality under varying environmental and management conditions. GrainBiomGrowthYld_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Grain growth yield g.g-1 The biomass production efficiency of root nodule tissues containing nitrogen-fixing bacteria, representing the conversion of resources into symbiotic nitrogen fixation structures. This nodule growth yield affects biological nitrogen fixation capacity and influences soil nitrogen inputs in legume-based ecosystems. NoduGrowthYield_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Nodule growth yield g.g-1 The biomass production efficiency of leaf tissues, representing the conversion of resources into photosynthetic biomass per unit of investment. This leaf growth yield determines canopy development rate and affects light capture capacity and carbon assimilation potential. LeafBiomGrowthYld_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Leaf growth yield g.g-1 The accumulated thermal time required at establishment for plants to break winter dormancy and initiate spring growth processes, measured in hours of favorable temperatures. This initial heat requirement for spring leafout and dehardening determines the timing of seasonal growth resumption and affects vegetation phenology under climate variability. Hours4LenthenPhotoPeriod_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Initial heat requirement for spring leafout/dehardening h The accumulated chilling time required at establishment for plants to initiate autumn dormancy and cold hardening processes, measured in hours of cold exposure. This initial cold requirement for autumn leafoff and hardening determines winter preparation timing and affects plant survival under seasonal temperature variation. VRNZ Hours4ShortenPhotoPeriod_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Initial cold requirement for autumn leafoff/hardening h The total count of leaves present on an individual plant at a given developmental stage, representing leaf development and canopy complexity. This leaf number affects photosynthetic capacity and influences light interception and carbon assimilation potential. NumOfLeaves_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Leaf number 1 The total count of leaves present on a plant when reproductive development begins, representing the vegetative growth completed before flowering. This leaf number at floral initiation affects final plant size and influences resource allocation between vegetative and reproductive growth. LeafNumberAtFloralInit_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Leaf number at floral initiation 1 The accumulated thermal time required for plants to break winter dormancy and initiate spring leaf emergence, measured in hours of favorable temperatures. This heat requirement for spring leafout and dehardening determines seasonal growth timing and affects vegetation phenology responses to warming temperatures. Hours4Leafout_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Heat requirement for spring leafout/dehardening h Cold requirement for autumn leafoff/hardening (VRNF) refers to the amount of cold exposure (in terms of temperature and duration) required by certain plant species to trigger their transition to autumn or winter mode, which typically involves shedding leaves (leafoff) and/or undergoing physiological changes to harden or prepare for the harsh winter conditions. This cold requirement is typically expressed as a specific number of chill hours (hours of exposure to temperatures below a certain threshold). Understanding this requirement is important for predicting the seasonal behaviour and geographic distribution of plants, as well as simulating ecosystem responses to changes in climate. VRNF Hours4LeafOff_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Cold requirement for autumn leafoff/hardening h A numerical index that tracks the developmental stage or maturity level of individual leaves within plant canopies, providing information about leaf phenology and growth progression. This parameter is essential for modeling leaf area development, photosynthetic capacity changes, and seasonal patterns of canopy structure in vegetation growth models and ecological studies. KLowestGroLeafNode_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) PlantTraitDataType.txt Leaf growth stage counter 1 The minimum count of nodes bearing leaves that are considered in algorithms for distributing growth resources and biomass allocation within plant architectural models. This parameter controls how plant growth models simulate resource distribution patterns and affects predictions of canopy development, branching patterns, and overall plant structural dynamics in ecological and agricultural applications. KMinNumLeaf4GroAlloc_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) PlantTraitDataType.txt Number of minimum leafed nodes used in growth allocation 1 The rate of new leaf production per unit time at a standardized temperature of 25 degrees Celsius, representing the intrinsic leaf development capacity under optimal thermal conditions. This rate of leaf initiation at 25 degrees Celsius is used to calibrate temperature responses of leaf development in vegetation models. RefLeafAppearRate_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Rate of leaf initiation h-1 The ratio of leaf length to leaf width, representing leaf shape and morphological characteristics that affect light interception and water loss patterns. This leaf length to width ratio influences photosynthetic efficiency and transpiration rates in plant canopies. WDLF rLen2WidthLeaf_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Leaf length:width ratio 1 The ratio of leaf surface area to leaf dry mass during active growth periods, representing leaf construction efficiency and photosynthetic investment strategies. This leaf area to mass during growth affects light capture per unit of biomass investment and influences plant competitive ability and resource use efficiency. SLA1_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Leaf area:mass during growth m2.g-1 The critical air temperature that triggers spring leaf emergence and loss of cold tolerance in deciduous plants, representing the thermal threshold for seasonal growth resumption. This threshold temperature for spring leafout and dehardening determines vegetation phenology timing and affects growing season length under temperature variability. TCZ TC4LeafOut_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Threshold temperature for spring leafout/dehardening Cel The ratio of petiole length to petiole mass during active growth periods, representing petiole construction efficiency and support structure investment. This petiole length to mass during growth affects leaf positioning and mechanical support per unit of biomass investment. PetoLen2Mass_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Petiole length:mass during growth m.g-1 The accumulated duration of favorable temperatures above a critical threshold required for plants to complete spring dormancy release and leaf emergence. This hours above threshold temperature required for spring leafout and dehardening determines phenological timing and affects vegetation response to temperature patterns. HourReq4LeafOut_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Hours above threshold temperature required for spring leafout/dehardening h The total count of lateral shoots or branches on an individual plant, representing architectural complexity and resource allocation to structural development. This number of branches of the plant affects canopy structure and influences light interception and competitive ability. NumOfBranches_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Number of branches of the plant 1 The count of primary lateral shoots originating directly from the main stem, representing the basic architectural structure of plant branching. This main branch number affects canopy architecture and influences light distribution and resource allocation patterns. BranchNumber_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Main branch number 1 An identification code or index assigned to individual branches for tracking purposes in plant architectural analysis and modeling. This branch number identification enables systematic monitoring of branch-specific growth and phenological processes. BranchNumber_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Branch number id NA The total count of primary branches emerging from the central stem or trunk, representing the fundamental branching pattern of plant architecture. This number of main branch determines structural complexity and affects mechanical stability and resource distribution. MainBranchNum_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Number of main branch 1 A binary indicator marking whether a branch has initiated senescence processes that lead to leaf and tissue abscission. This branch phenology flag for senescence tracks the timing of seasonal or stress-induced senescence events in plant phenological models. Prep4Literfall_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Branch phenology flag for senescence NA The accumulated time in hours from maturity to the completion of senescence and litterfall processes in individual branches. This hour counter for phenological senescence of a branch quantifies the duration of senescence and affects nutrient cycling timing. Hours4LiterfalAftMature_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Hour counter for phenological senescence of a branch h A binary indicator marking whether active senescence processes are occurring in a branch, including leaf color change and abscission preparation. This branch phenological senescence flag determines resource remobilization timing and affects seasonal nutrient cycling patterns. doSenescence_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Branch phenological senescence flag NA A binary indicator marking whether nutrient remobilization processes are active in a branch, involving the transfer of nutrients from senescing tissues to storage organs. This branch phenological remobilization flag affects nutrient conservation efficiency and influences plant resource economy. doRemobilization_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Branch phenological remobilization flag NA A binary indicator marking the initiation of spring leafout processes in a branch, including bud break preparation and early leaf development. This branch phenological flag for leafout initialization determines growing season onset and affects canopy development timing. doInitLeafOut_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Branch phenological flag for leafout initialization NA A binary indicator marking active leaf emergence and expansion processes in a branch during spring or favorable conditions. This branch phenological flag for leafout tracks canopy development progress and affects photosynthetic capacity establishment. doPlantLeafOut_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Branch phenological flag for leafout NA A binary indicator marking the occurrence of leaf abscission and fall processes in a branch during autumn or stress conditions. This branch phenological flag for leaf off determines defoliation timing and affects seasonal carbon cycling patterns. doPlantLeaveOff_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Branch phenological flag for leaf off NA A binary indicator used to identify when a branch has died due to stress, damage, or natural senescence processes. This flag to detect branch death enables tracking of branch mortality and affects carbon allocation and canopy structure in vegetation models. iPlantBranchState_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Flag to detect branch death NA The minimum concentration of mobile carbon compounds needed to initiate new branch development, including sugars and other energy-rich compounds. This branch nonstructural carbon content required for new branch determines branching capacity and affects plant architectural development under resource limitation. NonstCMinConc2InitBranch_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Branch nonstructural carbon content required for new branch g.g-1 The standardized count of stem nodes during vegetative development, adjusted for maturity group and growth conditions to enable comparison across varieties. This normalized node number during vegetative growth stages tracks developmental progress and affects leaf production capacity. NodeNumNormByMatgrp_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Normalized node number during vegetative growth stages 1 The rate of increase in standardized node count per unit time during vegetative development, representing the tempo of structural development. This gain in normalized node number during vegetative growth stages determines canopy expansion rate and affects resource acquisition potential. HourlyNodeNumNormByMatgrp_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Gain in normalized node number during vegetative growth stages h-1 The rate of increase in standardized node count per unit time during reproductive development, representing the tempo of flower and fruit production sites. This gain in normalized node number during reproductive growth stages determines reproductive capacity and affects seed production potential. dReproNodeNumNormByMatG_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Gain in normalized node number during reproductive growth stages h-1 The total count of nodes present on individual shoots or branches, representing the structural complexity and developmental stage of plant architecture. This shoot node number affects leaf arrangement patterns and influences photosynthetic surface area distribution. ShootNodeNum_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Shoot node number 1 The total count of nodes present on a plant stem when flowering processes begin, representing the vegetative development completed before reproductive transition. This node number at floral initiation determines potential flower and fruit production sites and affects final reproductive output. NodeNum2InitFloral_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Node number at floral initiation 1 The standardized count of stem nodes during reproductive development, adjusted for maturity group to enable comparison of reproductive development across varieties. This normalized node number during reproductive growth stages tracks flowering progression and affects reproductive site availability. ReprodNodeNumNormByMatrgrp_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Normalized node number during reproductive growth stages 1 The total count of nodes present on a plant when flowers reach full bloom and functional maturity, representing the structural development achieved by peak flowering. This node number at anthesis determines maximum reproductive capacity and affects pollination and fertilization success. NodeNumberAtAnthesis_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Node number at anthesis 1 The rate of new node formation per unit time at a standardized temperature of 25 degrees Celsius, representing the intrinsic developmental tempo under optimal thermal conditions. This rate of node initiation at 25 degrees Celsius is used to calibrate temperature responses of structural development in vegetation models. RefNodeInitRate_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Rate of node initiation h-1 The ratio of internode length to internode mass during active growth periods, representing stem construction efficiency and elongation patterns. This internode length to mass during growth affects plant height development and influences mechanical support per unit of biomass investment. NodeLenPergC_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Internode length:mass during growth m.g-1 The proportional fraction of total plant growth allocated to node development and associated structures, determining the investment in structural attachment points. This parameter for allocation of growth to nodes affects plant architecture and influences leaf and branch production capacity. FracGroth2Node_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Parameter for allocation of growth to nodes 1 The count of nodes that are simultaneously active in growth and development processes, representing the active growing points on a plant. This number of concurrently growing nodes affects resource distribution patterns and influences overall plant development rate. NumCogrowthNode_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Number of concurrently growing nodes 1 The lowest water potential value recorded in plant canopy tissues during a 24-hour period, representing the maximum water stress experienced daily. This minimum daily canopy water potential indicates drought stress severity and affects photosynthetic capacity and plant survival. PSICanPDailyMin_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Minimum daily canopy water potential MPa A factor quantifying the degree of foliage aggregation at the current leaf area index, affecting light penetration and internal shading within plant canopies. This clumping factor for self-shading in canopy layer at current leaf area index influences photosynthetic efficiency and canopy productivity. ClumpFactorNow_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Clumping factor for self-shading in canopy layer at current LAI 1 A dimensionless parameter quantifying the degree of foliage aggregation that affects light distribution and internal shading within plant canopies. This clumping factor for self-shading in canopy layer influences photosynthetic light use efficiency and canopy carbon assimilation rates. ClumpFactor_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Clumping factor for self-shading in canopy layer 1 A binary indicator used to identify when plant canopy or shoot systems have died due to stress, damage, or natural senescence processes. This flag to detect canopy death enables tracking of shoot mortality and affects carbon allocation and ecosystem productivity. iPlantShootState_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Flag to detect canopy death NA The highest possible number of grain-bearing nodes that can develop on a single branch, representing the genetic potential for reproductive site formation. This maximum grain node number per branch determines yield potential and affects crop productivity under optimal growing conditions. MaxPotentSeedNumber_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Maximum grain node number per branch 1 The highest possible number of grains that can develop at a single node position, representing the genetic potential for seed production per reproductive site. This maximum grain number per node determines local seed density and affects overall reproductive output. MaxSeedNumPerSite_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Maximum grain number per node 1 The largest possible individual grain mass that can be achieved under optimal growing conditions, representing the genetic potential for seed size. This maximum grain size affects seed quality and influences crop market value and nutritional content. MaxSeedCMass_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Maximum grain size g The count of nodal points present in the embryonic structure of seeds at planting, representing the initial developmental potential for shoot formation. This number of nodes in seed determines initial growth capacity and affects early seedling establishment success. ShootNodeNumAtPlanting_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Number of nodes in seed 1 The individual mass of seeds used for planting, representing the initial resource endowment for seedling establishment and early growth. This grain size at seeding affects germination success and influences early seedling vigor and competitive ability. SeedCMass_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Grain size at seeding g The highest possible rate of mass accumulation in individual grains during the grain filling period, representing the genetic potential for seed development rate. This maximum rate of fill per grain determines harvest timing and affects final grain quality under optimal conditions. GrainFillRate25C_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Maximum rate of fill per grain g.h-1 A binary indicator that signals when crops have reached physiological maturity based on grain filling completion, marking the end of active grain development. This flag to detect physiological maturity from grain fill determines harvest readiness and affects crop quality and yield optimization timing. HourFailGrainFill_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Flag to detect physiological maturity from grain fill NA The accumulated time for mobilizing stored carbon reserves during spring dormancy break and leaf emergence processes. This counter for mobilizing nonstructural carbon during spring leafout and dehardening tracks the duration of carbon remobilization and affects seasonal growth initiation timing. Hours2LeafOut_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Counter for mobilizing nonstructural carbon during spring leafout/dehardening h The accumulated time for mobilizing and storing carbon reserves during autumn leaf senescence and cold hardening processes. This counter for mobilizing nonstructural carbon during autumn leafoff and hardening tracks resource conservation timing and affects winter survival preparation. HoursDoingRemob_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Counter for mobilizing nonstructural carbon during autumn leafoff/hardening h A categorical indicator of the current developmental stage of individual plant branches, tracking phenological progression through growth phases. This plant branch growth stage determines resource allocation patterns and affects branch-specific physiological processes. iPlantCalendar_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Plant branch growth stage NA The critical low temperature threshold below which reproductive processes and seed formation are impaired, representing the cold sensitivity of reproductive development. This temperature below which seed set is adversely affected determines growing region suitability and affects crop yield potential under cool conditions. TCChill4Seed_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Temperature below which seed set is adversely affected Cel The critical high temperature threshold above which reproductive processes and seed formation are impaired, representing the heat sensitivity of reproductive development. This temperature above which seed set is adversely affected determines growing region suitability and affects crop yield potential under warming conditions. HighTempLimitSeed_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Temperature above which seed set is adversely affected Cel The degree of seed development response to changes in canopy temperature, representing the thermal sensitivity of reproductive processes. This sensitivity to canopy temperature affects seed set success and influences reproductive output under temperature variability. SeedTempSens_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Sensitivity to canopy temperature K-1 The photoperiod threshold that triggers developmental transitions in plants, representing the minimum or maximum daylight duration required for phenological advancement. This critical daylength for phenological progress determines flowering and maturation timing and affects seasonal development patterns. CriticPhotoPeriod_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Critical daylength for phenological progress h The deviation between actual photoperiod and critical photoperiod thresholds that drives phenological development rates in photoperiod-sensitive plants. This difference between current and critical daylengths used to calculate phenological progress determines the pace of developmental transitions. PhotoPeriodSens_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Difference between current and critical daylengths used to calculate phenological progress h The initial degree of foliage aggregation at canopy establishment that affects light distribution and internal shading patterns. This initial clumping factor for self-shading in canopy layer determines early canopy light interception efficiency and influences seedling establishment success. ClumpFactorInit_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Initial clumping factor for self-shading in canopy layer 1 The accumulated chilling time below a critical temperature threshold required to initiate autumn dormancy and cold hardening processes. This number of hours below set temperature required for autumn leafoff and hardening determines seasonal dormancy timing and affects winter survival preparation. HourReq4LeafOff_brch Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Number of hours below set temperature required for autumn leafoff/hardening 1 A temperature adjustment factor applied to Arrhenius equations to account for plant thermal acclimation responses to changing temperature conditions. This adjustment of Arrhenius curves for plant thermal acclimation modifies physiological rate responses and affects plant adaptation to temperature variability. TempOffset_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Adjustment of Arhhenius curves for plant thermal acclimation Cel A categorical classification of plants based on their photosynthetic carbon fixation pathway, distinguishing between three-carbon and four-carbon photosynthetic mechanisms. This plant photosynthetic type determines temperature and carbon dioxide response patterns and affects water use efficiency. iPlantPhotosynthesisType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Plant photosynthetic type (C3 or C4) NA A categorical classification of plants based on the presence or absence of specialized water and nutrient transport tissues. This plant growth type determines resource acquisition strategies and affects ecosystem structure and nutrient cycling patterns. iPlantRootProfile_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Plant growth type (vascular, non-vascular) NA A categorical classification of plants based on their life cycle duration, distinguishing between single-season and multi-year growth patterns. This plant growth habit determines resource allocation strategies and affects ecosystem carbon storage and turnover rates. iPlantPhenolPattern_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantTraitDataType.txt Plant growth habit (annual or perennial) NA A scaling factor quantifying how temperature changes affect the molecular diffusion rates of chemical species in environmental media. This temperature effect on diffusivity influences contaminant transport rates and affects chemical distribution patterns in soils and groundwater. TScal4Difsvity_vr ChemTranspDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Temperature effect on diffusivity 1 A parameter representing the mixing and spreading of dissolved chemicals in water due to heterogeneity in flow paths and velocities. This aqueous dispersivity scalar affects contaminant plume development and influences solute transport modeling in groundwater systems. DISP_3D ChemTranspDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Aqueous dispersivity scalar m The rate of molecular diffusion of gaseous chemical species through environmental media, determining the spread of gases through air and porous materials. This gaseous diffusivity affects atmospheric chemical transport and influences air quality and greenhouse gas dynamics. GasDifc_vr ChemTranspDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) For various gases? Vector Gaseous diffusivity m2.h-1 The rate of molecular diffusion of dissolved chemical species through liquid media, determining the spread of solutes in water and soil solutions. This solute diffusivity affects contaminant transport rates and influences nutrient and pollutant distribution in aquatic and terrestrial systems. SoluteDifusvty_vr ChemTranspDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) For various solutes? Is the solute specified by another attribute as in CORAL? Vector Solute diffusivity m2.h-1 The rate of molecular diffusion of dissolved organic carbon compounds through soil water, affecting the mobility of organic matter in terrestrial ecosystems. This aqueous dissolved organic carbon diffusivity in soil influences carbon cycling and affects soil organic matter distribution patterns. DOMdiffusivity_vr ChemTranspDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) This is interesting because it's both aqueous and in soil. Vector Aqueous dissolved organic carbon diffusivity in soil m2.h-1 The rate of molecular diffusion of water vapor through soil pores and air spaces, affecting moisture transport and evaporation from soil surfaces. This water vapor diffusivity in soil influences soil drying patterns and affects plant water availability and root zone hydrology. WVapDifusvitySoil_vr ChemTranspDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Water vapor diffusivity in soil m2.h-1 The rate of molecular diffusion of water vapor through snow pack pore spaces, affecting sublimation and moisture transport within snow layers. This water vapor diffusivity in snow influences snow metamorphism and affects snowpack stability and melting patterns. H2OVapDifsc_snvr ChemTranspDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Water vapor diffusivity in snow m2.h-1 The rate of molecular diffusion of water vapor through decomposing plant litter layers, affecting moisture loss and decomposition rates. This water vapor diffusivity in litter influences litter moisture content and affects decomposer activity and carbon cycling rates. VaporDiffusivityLitR_col ChemTranspDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Water vapor diffusivity in litter m2.h-1 The rate of molecular diffusion of water vapor through atmospheric air, determining humidity transport and atmospheric moisture distribution. This water vapor diffusivity in air affects evapotranspiration processes and influences atmospheric water cycling and precipitation patterns. WVapDifusvityAir_col ChemTranspDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Water vapor diffusivity in air m2.h-1 The maximum concentration of gaseous chemical species that can dissolve in aqueous solutions under specified conditions. This solubility of gases affects gas-water exchange processes and influences dissolved gas concentrations in aquatic and soil systems. GasSolbility_vr ChemTranspDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) For various gases? Solubility of gases g{solute}.g-1{gas} The net rate of gaseous chemical transport calculated from the preceding computational time interval, providing continuity for transport modeling. This net gaseous flux from previous time step maintains transport momentum and affects temporal consistency in chemical distribution predictions. RGasTranspFlxPrev_vr ChemTranspDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Net gaseous flux from previous time step g.h-1/{grid} The net rate of methane transport in aqueous phases calculated from the preceding computational time interval, tracking dissolved methane movement. This net aqueous methane flux from previous time step affects methane distribution patterns and influences greenhouse gas cycling in aquatic systems. RCH4PhysexchPrev_vr ChemTranspDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Net aqueous CH4 flux from previous time step g.h-1/{grid} The net rate of chemical transport in aqueous phases calculated from the preceding computational time interval, providing continuity for dissolved species modeling. This net aqueous flux from previous time step maintains chemical transport momentum and affects temporal consistency in solute distribution predictions. RO2AquaSourcePrev_vr ChemTranspDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Net aqueous flux from previous time step g.h-1/{grid} The complete aluminum content transported by surface water flow from terrestrial areas, including both dissolved and particulate aluminum fractions from weathering and anthropogenic sources. This total aluminum in runoff affects water quality and influences aluminum toxicity in downstream aquatic ecosystems. trcSalt_FloXSurRunoff_2D ChemTranspDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total aluminum in runoff mol.h-1/{grid} The rate of gaseous chemical transport by surface water flow, including dissolved gases and gas exchange during overland flow processes. This surface runoff gas flux affects atmospheric gas exchange and influences greenhouse gas emissions from terrestrial watersheds to aquatic systems. trcg_FloXSurRunoff_2D ChemTranspDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Surface runoff gas flux g.h-1/{grid} The rate of nutrient transport by surface water flow from terrestrial areas to aquatic systems, including nitrogen and phosphorus compounds from soil and vegetation. This surface runoff nutrient flux affects water quality and influences eutrophication potential in receiving water bodies. trcn_FloXSurRunoff_2D ChemTranspDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Surface runoff nutrient flux g.h-1/{grid} The rate of dissolved organic carbon transport by surface water flow from terrestrial areas, representing the movement of soluble organic compounds to aquatic systems. This surface runoff dissolved organic carbon flux affects water quality and influences carbon cycling between terrestrial and aquatic ecosystems. DOM_FloXSurRunoff_2DH ChemTranspDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Surface runoff dissolved organic carbon flux g.h-1/{grid} The concentration of ammonium ions in soil, representing plant-available nitrogen and the oxidized form of organic nitrogen mineralization. This soil ammonium content affects plant nutrition and influences nitrification processes and soil nitrogen cycling dynamics. CNH4_vr SOIL_CHEM_NH4 AmeriFlux BADM variable name: SOIL_CHEM_NH4. Changed "content" to "concentration" since units are mg/kg Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Soil ammonium content mg.kg-1 The concentration of nitrate ions in soil, representing the oxidized form of plant-available nitrogen from nitrification and fertilizer inputs. This soil nitrate content affects plant nutrition and influences groundwater contamination potential and denitrification processes. CNO3_vr SOIL_CHEM_NO3 AmeriFlux BADM variable name: SOIL_CHEM_NO3. Changed "content" to "concentration" since units are mg/kg Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Soil nitrate content mg.kg-1 The concentration of phosphate ions in soil, representing plant-available phosphorus for energy transfer and cellular processes. This soil phosphate content affects plant nutrition and influences ecosystem productivity and phosphorus cycling dynamics. CPO4_vr Changed "content" to "concentration" since units are mg/kg Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Soil phosphate content mg.kg-1 The concentration of phosphate ions within soil micropore spaces adjacent to fertilizer bands, representing localized phosphorus availability around applied fertilizers. This phosphate concentration band micropore affects root phosphorus uptake efficiency and influences fertilizer use optimization. CPO4B_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt missing definitions; measured in "soil" or "soil band micropore"?; context "band micropore"? Phosphate concentration band micropore g.m-3 The concentration of phosphate ions within soil micropore spaces away from fertilizer application zones, representing background soil phosphorus availability. This phosphate concentration non-band micropore affects general plant phosphorus nutrition and influences soil phosphorus cycling dynamics. CPO4S_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt measured in soil? Phosphate concentration non-band micropore g.m-3 The horizontal transport rates of dissolved organic matter below the soil surface, representing lateral movement of organic compounds through subsurface flow paths. These subsurface lateral dissolved organic matter fluxes affect soil carbon distribution and influence nutrient cycling between different landscape positions. DOM_transpFlx_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Subsurface lateral dissolved organic matter fluxes g.h-1/{grid} The horizontal transport rates of chemical tracers through subsurface soil layers, representing lateral movement of dissolved substances below ground. These subsurface lateral tracer fluxes affect contaminant distribution and influence chemical connectivity between different soil zones. trcs_SubsurTransp_flx_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Subsurface lateral tracer fluxes g.h-1/{grid} The total mass of dissolved chemical substances contained within large soil pore spaces that allow rapid water and solute movement. This solute mass in macropore affects preferential flow transport and influences chemical leaching and groundwater contamination potential. trcs_soHml_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) For various solutes? SoilBGCDataType.txt should measured in be soil, and context be macropore? Solute mass in macropore g/{grid} The total mass of dissolved chemical substances contained within small soil pore spaces that restrict water and solute movement. This solute mass in micropore affects slow-release chemical transport and influences long-term chemical retention in soil matrices. trcs_solml_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Solute mass in micropore g/{grid} The concentration of dissolved chemical substances within small soil pore spaces, representing chemical storage in low-mobility soil water. This solute concentration in micropore affects chemical residence time and influences gradual chemical release to plant roots and groundwater. trc_solcl_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Solute concentration in micropore g.m-3 The concentration of gaseous chemical substances within small soil pore spaces, representing gas storage in restricted soil air spaces. This gaseous concentration in micropore affects gas diffusion rates and influences soil-atmosphere gas exchange and anaerobic processes. trcg_gascl_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Gaseous concentration in micropore g.m-3 The rate of enzymatic breakdown of solid soil organic matter into dissolved forms, representing the initial step of organic matter decomposition. This solid soil organic matter hydrolysis rate affects nutrient mineralization and influences soil carbon cycling and plant nutrient availability. tRHydlySOM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Should measurement of be decomposed further? E.g. qualifier = "solid"? SoilBGCDataType.txt Solid soil organic matter hydrolysis rate g.m-2.h-1 The rate of enzymatic breakdown of microbial cell residues and byproducts in soil, representing the decomposition of dead microbial biomass. This microbial residual hydrolysis rate affects soil organic matter turnover and influences the formation of stable soil organic carbon pools. tRHydlyBioReSOM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Microbial residual hydrolysis rate g.m-2.h-1 The rate of enzymatic breakdown of organic matter that is adsorbed onto soil mineral surfaces, representing the decomposition of protected organic compounds. This sorbed organic matter hydrolysis rate affects stabilized carbon turnover and influences long-term soil carbon storage dynamics. tRHydlySoprtOM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Sorbed organic matter hydrolysis rate g.m-2.h-1 The rate of nutrient loss from soil through surface water flow, representing the transport of dissolved nutrients from terrestrial to aquatic systems. This nutrient tracer loss through surface runoff affects soil fertility and influences water quality and eutrophication in receiving water bodies. trcn_SurfRunoff_flx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Nutrient tracer loss through surface runoff g.h-1/{grid} The present effectiveness of chemical compounds that reduce the rate of ammonia oxidation to nitrite in soil, representing active suppression of nitrifying bacteria. This current nitrification inhibition activity affects nitrogen retention in soil and influences nitrous oxide emissions and nitrate leaching potential. ZNFNI_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Is this a Ki? SoilBGCDataType.txt Units missing? Is this valid? Current nitrification inhibition activity 1 The initial effectiveness of chemical compounds that reduce the rate of ammonia oxidation to nitrite in soil at application, representing the starting suppression of nitrifying bacteria. This initial nitrification inhibition activity determines the duration of nitrogen conservation and affects fertilizer efficiency optimization. ZNFN0_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Initial nitrification inhibition activity 1 The present effectiveness of chemical compounds that suppress specific soil enzymatic processes, representing active biochemical inhibition in soil systems. This current inhibition activity affects soil biogeochemical processes and influences nutrient cycling and microbial activity patterns. ZNHUI_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Current inhibition activity 1 The effectiveness of chemical compounds that reduce the rate of urea breakdown to ammonia by urease enzymes in soil. This urea hydrolysis inhibition activity affects nitrogen release timing and influences ammonia volatilization and plant nitrogen availability. ZNHU0_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Urea hydrolysis inhibition activity 1 The total mass of volatile chemical tracers in the entire soil column at the completion of a computational time interval, representing final chemical storage state. This column integrated volatile tracer mass in soil at the end of time step provides mass balance closure and affects subsequent transport calculations. trcg_soilMass_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Column integrated volatile tracer mass in soil at the end of time step g/{grid} The total mass of volatile chemical tracers in the entire soil column at the start of a computational time interval, representing initial chemical storage state. This column integrated volatile tracer mass in soil at the beginning of time step provides mass balance initialization and affects transport modeling continuity. trcg_soilMass_beg_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Column integrated volatile tracer mass in soil at the beginning of time step g/{grid} The total mass of gaseous chemical substances contained within small pore spaces in individual soil layers, representing gas storage in restricted soil air volumes. This layer mass of gases in micropores affects vertical gas transport and influences soil-atmosphere gas exchange rates. trcg_gasml_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Layer mass of gases in micropores g/{grid} The total mass of volatile chemical tracers across all environmental compartments at the start of a computational time interval, representing system-wide initial chemical inventory. This column integrated volatile tracer mass at the beginning of time step provides comprehensive mass balance initialization for multi-compartment transport modeling. trcg_TotalMass_beg_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Column integrated volatile tracer mass at the beginning of time step g/{grid} The instantaneous total mass of volatile chemical tracers across all environmental compartments at the current time, representing real-time chemical inventory. This column integrated volatile tracer mass at the moment provides current system status and affects dynamic chemical distribution assessments. trcg_TotalMass_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Column integrated volatile tracer mass at the moment g/{grid} The total mass of volatile chemical tracers contained within plant root tissues across the entire soil column, representing chemical uptake and accumulation by vegetation. This column integrated volatile tracer mass in roots affects plant-mediated chemical transport and influences phytoremediation potential. trcg_rootMass_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Column integrated volatile tracer mass in roots g/{grid} The total mass of volatile chemical tracers contained within plant root tissues at the start of a computational time interval, representing initial plant chemical burden. This column integrated volatile tracer mass in roots at the beginning of time step provides plant uptake modeling initialization and affects vegetation transport calculations. trcg_rootMass_beg_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Column integrated volatile tracer mass in roots at the beginning of time step g/{grid} The negative logarithm of hydrogen ion concentration in soil solution, representing soil acidity or alkalinity conditions that affect chemical reactions and biological processes. This soil pH influences nutrient availability, microbial activity, and plant growth in terrestrial ecosystems. PH_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Soil pH 1 The total amount of exchangeable cations that soil can hold on its surface and exchange with the soil solution, representing soil fertility and nutrient retention capacity. This soil cation exchange capacity affects plant nutrient availability and influences soil chemical buffering and fertilizer efficiency. CEC_SOIL CEC_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) ODM2 variable name concept "Cation exchange capacity (CEC)": Cation exchange capacity (CEC) is a measure of the total negative charges within the soil that adsorb plant nutrient cations such as calcium (Ca2+), magnesium (Mg2+) and potassium (K+). As such, the CEC is a property of a soil that describes its capacity to supply nutrient cations to the soil solution for plant uptake. HWSD2: CEC_SOIL [cmolc/kg]. SoilBGCDataType.txt Soil cation exchange capacity cmol.kg-1 The total amount of exchangeable anions that soil can hold on its surface and exchange with the soil solution, representing soil capacity to retain negatively charged ions. This soil anion exchange capacity affects phosphate and sulfate retention and influences nutrient cycling in acidic and highly weathered soils. AEC_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Soil anion exchange capacity cmol.kg-1 The sensitivity of soil microbial metabolic processes to temperature changes, representing how decomposition and biogeochemical reaction rates respond to thermal conditions. This temperature dependence of microbial activity affects organic matter turnover and influences soil carbon cycling under climate warming scenarios. TempSensDecomp_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Not sure how to decompose SoilBGCDataType.txt Temperature dependence of microbial activity Cel The sensitivity of soil microbial metabolic processes to soil water content changes, representing how decomposition and biogeochemical reaction rates respond to hydration conditions. This moisture dependence of microbial activity affects organic matter turnover and influences soil carbon cycling under varying precipitation patterns. MoistSensDecomp_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Not sure how to decompose SoilBGCDataType.txt Moisture dependence of microbial activity 1 The rate of gaseous chemical transport to the soil surface through combined advective and diffusive processes, representing multiple mechanisms of gas movement through soil. This surface gas flux in advection plus diffusion affects soil-atmosphere gas exchange and influences greenhouse gas emissions from terrestrial systems. GasDiff2Surf_flx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Surface gas flux in advection+diffusion g.h-1/{grid} The combined consumption of oxygen by plant roots and soil microorganisms for respiration processes, representing total biological oxygen demand in soil systems. This total sink in soil due to plant and microbial respiration affects soil oxygen availability and influences anaerobic processes and root health. RO2UptkSoilM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total sink in soil due to plant and microbial respiration g/{grid} The total rate of gaseous chemical emission from soil surfaces through all transport pathways including molecular diffusion, bubble formation, precipitation inputs, and plant-mediated transport. This surface gas flux including diffusion, ebullition, wet deposition and plant transport represents comprehensive soil-atmosphere gas exchange. SurfGasEmiss_flx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Surface gas flux, including diffusion, ebullition, wet deposition and plant transp g.h-1/{grid} The rate of volatile chemical removal from soil systems through water-mediated transport processes, including dissolved gas loss in drainage and runoff. This hydrological loss of volatile tracers affects chemical mass balance and influences contaminant transport from soil to groundwater and surface water systems. GasHydroLoss_flx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) How to decompose this? SoilBGCDataType.txt Hydrological loss of volatile tracers g.h-1/{grid} The rate of volatile chemical removal from soil systems through subsurface water-mediated transport processes, including dissolved gas loss through groundwater flow and deep drainage. This subsurface hydrological loss of volatile tracers affects deep soil chemical depletion and influences groundwater contamination and long-term chemical fate. GasHydroSubsLoss_flx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) How to decompose this? SoilBGCDataType.txt Subsurface hydrological loss of volatile tracers g.h-1/{grid} The rate of volatile chemical removal from soil systems through surface water-mediated transport processes, including dissolved gas loss in surface runoff and shallow drainage. This surface hydrological loss of volatile tracers affects topsoil chemical depletion and influences surface water contamination and chemical loading to streams. GasHydroSurfLoss_flx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Surface hydrological loss of volatile tracers g.h-1/{grid} The cumulative carbon input to soil systems through organic matter additions, including compost, crop residues, and other carbon-rich materials applied to enhance soil fertility. This total carbon amendment affects soil organic matter content and influences carbon sequestration and soil health improvement. AmendC_CumYr_flx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total carbon amendment g/{grid} The total accumulated volatile chemical removal from soil systems through all water-mediated transport processes over time, representing long-term chemical depletion. This cumulative hydrological loss of volatile tracers affects overall chemical mass balance and influences the persistence and fate of volatile compounds in terrestrial systems. GasHydroLoss_cumflx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Cumulative hydrological loss of volatile tracers g/{grid} The cumulative nitrogen input to soil systems through synthetic and organic fertilizer applications, representing anthropogenic nitrogen additions to terrestrial ecosystems. This total fertilizer nitrogen amendment affects soil nitrogen availability and influences nitrous oxide emissions and groundwater contamination potential. FertN_Flx_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total fertilizer nitrogen amendment g/{grid} The cumulative phosphorus input to soil systems through synthetic and organic fertilizer applications, representing anthropogenic phosphorus additions to terrestrial ecosystems. This total fertilizer phosphorus amendment affects soil phosphorus availability and influences eutrophication potential in surface waters through runoff and erosion. FerPFlx_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total fertilizer phosphorus amendment g/{grid} The cumulative transport rate of dissolved organic carbon across terrestrial surface boundaries, including all pathways of surface carbon movement to aquatic systems. This total surface dissolved organic carbon flux affects carbon cycling between terrestrial and aquatic ecosystems and influences water quality and biogeochemical processes in receiving waters. HydroSufDOCFlx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) I called these "chemical flux" to distinguish from "heat flux" SoilBGCDataType.txt Total surface dissolved organic carbon flux g/{grid} The cumulative transport rate of dissolved organic carbon through subsurface soil and groundwater systems, representing below-ground carbon movement and leaching processes. This total subsurface dissolved organic carbon flux affects groundwater chemistry and influences carbon cycling between soil, groundwater, and atmospheric systems. HydroSubsDOCFlx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total subsurface dissolved organic carbon flux g/{grid} The cumulative carbon mass in fallen plant materials including leaves, branches, and reproductive structures that contribute to soil organic matter formation. This total litterfall carbon represents the primary input of organic matter to forest floors and affects soil carbon accumulation and decomposer community dynamics. LiterfalOrgM_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total litterfall carbon g/{grid} The cumulative transport rate of dissolved organic nitrogen across terrestrial surface boundaries, including runoff and surface flow pathways of nitrogen-containing organic compounds. This total surface dissolved organic nitrogen flux affects nitrogen cycling between terrestrial and aquatic ecosystems and influences eutrophication potential in receiving waters. HydroSufDONFlx_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total surface dissolved organic nitrogen flux g/{grid} Total Subsurface DON Flux refers to the total flow or movement of Dissolved Organic Nitrogen (DON) below the Earth's surface. It is a part of the nitrogen cycle that involves the breakdown and distribution of nitrogenous compounds in the soil, which can affect the health of ecosystems and the quality of groundwater. HydroSubsDONFlx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total subsurface dissolved organic nitrogen flux g/{grid} Total surface DOP Flux refers to the total quantity of Dissolved Organic Phosphorus (DOP) that is transferred from one place to another on the earth's surface over a specific time period. It is a critical component of the phosphate cycle and is primarily produced through the breakdown of organic compound. This measure plays a critical role in the uptake of phosphorus and its availability in the environment. HydroSufDOPFlx_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total surface dissolved organic phosphorus flux g/{grid} Total subsurface DOP flux refers to the total flow of dissolved organic phosphorus (DOP) from higher to lower concentrations in a specified subsurface area, usually measured in units of mass per time per area. DOP is a subset of total phosphorus that includes any organic compounds containing phosphorus, such as phospholipids and nucleic acids. Being able to quantify DOP fluxes is key to understanding nutrient cycling in ecosystems and crucial for constructing ecosystem and land surface models. HydroSubsDOPFlx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total subsurface dissolved organic phosphorus flux g/{grid} Total soil precipitated P refers to the total amount of phosphorus (P) in the soil that is in a precipitated form. It is an important measure of the nutrient status of the soil, as phosphorus is a vital nutrient for plant growth. This parameter is often used in Earth system modeling to understand and simulate nutrient cycling and soil fertility. tXPO4_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total soil precipited phosphorus g/{grid} Total soil autotrophic respiration refers to the total amount of carbon dioxide (CO2) released by the metabolic activity of autotrophic organisms in the soil. Autotrophic organisms, which include plants and some types of microorganisms, produce energy through photosynthesis and release CO2 as a byproduct. Autotrophic respiration contributes significantly to the overall soil respiration and is a key component of the carbon cycle. It is influenced by various factors such as temperature, moisture, and nutrient availability. RootResp_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) I think CO2 is wrong? Autotrophic should go somewhere. SoilBGCDataType.txt Total soil autotrophic respiration g/{grid} Total surface DIC flux refers to the total amount of dissolved inorganic carbon (DIC) that moves across the Earth's surface over a specified period of time. In the context of Earth system modeling, this is an important parameter that helps to understand and quantify the biogeochemical cycling of carbon at the global scale. It includes the natural fluxes of DIC to and from oceans, rivers, lakes, and other surface bodies of water, as well as anthropogenic (human-caused) DIC fluxes, such as those resulting from fossil fuel combustion and land use change. HydroSufDICFlx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total surface dissolved inorganic carbon flux g/{grid} Total subsurface DIC flux refers to the total amount of Dissolved Inorganic Carbon (DIC) that moves within the subsurface layers of an ecosystem. This includes movements through soil water, groundwater, and other subsurface flows. DIC in aquatic ecosystems includes gases, such as CO2 and CH4, and bicarbonates and carbonates. The measurement of this flux is important for understanding the carbon cycle within an ecosystem, particularly in the context of climate change and ocean acidification. HydroSubsDICFlx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total subsurface dissolved inorganic carbon flux g/{grid} The total surface dissolved inorganic nitrogen (DIN) flux refers to the total amount of DIN (comprising nitrate, nitrite, and ammonium) that moves across the surface of a given area over a certain period of time. This can include fluxes from atmospheric deposition, biological activity, and hydrological processes. Measuring the total surface DIN flux is important for understanding nitrogen cycling and nutrient availability in ecosystems. HydroSufDINFlx_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total surface dissolved inorganic nitrogen flux g/{grid} The total amount of dissolved inorganic nitrogen (DIN) that moves through the subsurface layer of an ecosystem over a particular period of time. This flux describes the rate of DIN transfer from one location to another, typically due to the process of leaching. DIN flux is an important component of the nitrogen cycle in an ecosystem, influencing soil fertility, plant growth, and water quality. HydroSubsDINFlx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total subsurface dissolved inorganic nitrogen flux g/{grid} The total amount of DIP that is transferred from the surface of the Earth (land and water bodies) to the atmosphere. The DIP flux is an important part of the phosphorus cycle and plays a crucial role in marine and terrestrial ecosystems. It influences productivity, food web dynamics, and the concentrations of greenhouse gases. HydroSufDIPFlx_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total surface dissolved inorganic phosphorus flux g/{grid} The total amount of dissolved inorganic phosphorus compounds that move through subsurface water systems over a specified time period. This includes phosphate ions and other inorganic phosphorus forms transported through groundwater, soil water, and other subsurface hydrological pathways, which is crucial for understanding phosphorus cycling in terrestrial ecosystems and its impact on soil fertility and water quality. HydroSubsDIPFlx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total subsurface dissolved inorganic phosphorus flux g/{grid} Total standing dead C refers to the total amount of carbon contained in dead standing trees in a particular area. This can vary based on factors such as forest type, tree species, and disturbance history. It represents a significant pool of carbon in forest ecosystems, and is important for understanding the carbon cycle and the role of forests in climate change. StandingDeadStrutElms_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total standing dead carbon g/{grid} Total N drainage below root zone represents the amount of nitrogen that has leached out from the root zone and entered the deeper layers of soil. This leaching process can result in a significant loss of nutrients from the soil, potentially impacting plant growth and productivity. Additionally, nitrogen leaching can contribute to groundwater pollution, as it can result in elevated levels of nitrate in groundwater. ZDRAIN_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total nitrogen drainage below root zone g/{grid} The amount of phosphorus that is leached from the root zone and transported to deeper soil layers or groundwater. This process can result in nutrient loss from the active plant uptake zone, potentially impacting plant growth and soil fertility while also contributing to potential groundwater contamination and reduced soil productivity in agricultural and natural ecosystems. PDRAIN_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total phosphorus drainage below root zone g/{grid} Amount of ions in the soil column of a grid cell, summed over the surface litter layer and the soil layers, counting dissolved salts in micropore and macropore water, fertilizer nitrogen, exchangeable ions and precipitated salts, each species by the number of ions it yields. UION_col Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), from the EcoSIM source, issue #109 EcoSIM declares UION_col as "total soil ion content, [mol d-2]", resets it each hour in Hour1Mod.F90, and sums it over the layers in RedistMod.F90. Formerly labelled Soil electrical conductivity, which its unit never matched (issue #109). The total over the modelled domain is Total soil ion content (BERVO:0000296). SoilBGCDataType.txt Soil column ion content mol/{grid} The total amount of dissolved ions transported through subsurface water systems over a specified time period. This includes the movement of various ions such as nitrate, phosphate, calcium, and potassium through groundwater and soil water pathways, which is essential for understanding nutrient cycling, soil chemistry, and the potential for groundwater contamination in terrestrial ecosystems. HydroIonFlx_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total water subsurface ion flux mol/{grid} The net exchange of nutrients between different pools or compartments in an ecosystem, such as between soil organic matter, microbial biomass, and plant tissues. This parameter quantifies the overall rate of nutrient cycling processes including mineralization, immobilization, and uptake, which is crucial for assessing ecosystem productivity, soil fertility, and the sustainability of nutrient cycling in terrestrial systems. RNut_MicbRelease_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total nutrient exchange g.h-1/{grid} The biochemical processes by which soil microorganisms convert gaseous compounds from one form to another through metabolic activities. This includes processes such as methanogenesis, methanotrophy, nitrification, and denitrification where microbes transform gases like methane, carbon dioxide, nitrous oxide, and oxygen, which are fundamental to biogeochemical cycling and influence greenhouse gas emissions from soils. trcs_RMicbUptake_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Microbial gases transformation g.h-1/{grid} The cumulative rate of all microbial processes that convert gaseous compounds in soil systems. This encompasses the integrated activity of all microorganisms involved in gas cycling, including methanogenic archaea, methanotrophic bacteria, nitrifying bacteria, and denitrifying microbes, providing a comprehensive measure of microbial contribution to atmospheric gas exchange and biogeochemical cycling in terrestrial ecosystems. trcs_RMicbUptake_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total microbial gases transformation g.h-1/{grid} The balance between nitrogen fixation and nitrogen loss processes mediated by soil microorganisms. This includes biological nitrogen fixation by free-living and symbiotic bacteria, as well as nitrogen losses through denitrification and other microbial processes, representing the overall contribution of microbial activity to the nitrogen budget of terrestrial ecosystems and soil fertility. Micb_N2Fixation_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Net microbial nitrogen exchange g.h-1/{grid} The combined contribution of plant and microbial processes that add dissolved organic carbon to the soil system. This includes root exudates, plant litter decomposition products, and microbial metabolites that increase the dissolved organic carbon pool, with positive values representing a net input of dissolved organic carbon to the soil that is important for soil carbon storage and microbial nutrition. REcoDOMProd_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Net plant+microbial dissolved organic carbon flux, >0 into soil g.h-1/{grid} The rate at which microorganisms produce and release dissolved organic matter into the soil system. This includes microbial metabolites, cell lysates, and extracellular compounds that contribute to the dissolved organic matter pool, with positive values representing microbial activities that increase soil dissolved organic matter content and serve as an important carbon and energy source for other soil organisms. RDOMMicProd_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Microbial dissolved organic matter flux, > 0 into soil g.h-1/{grid} The combined microbial respiration of dissolved organic carbon plus dissolved organic acids within a specific soil layer. This process represents the mineralization of dissolved organic matter by heterotrophic microorganisms, converting these compounds to carbon dioxide and other metabolic products, which quantifies an important component of soil carbon cycling and microbial energy metabolism. TMicHeterActivity_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total respiration of dissolved organic carbon plus dissolved organic acids in soil layer g{C}.h-1/{grid} Soil water volume occupied by microbial biomass refers to the portion of the total soil water volume that is occupied by the biomass of microorganisms present in the soil, including bacteria, fungi, and other microbes. This metric provides information about the microbial activity and the nutrient cycling capacity of the soil. Microbial biomass plays a significant role in various soil processes, including organic matter decomposition, nutrient cycling, and the formation of soil structure, and can serve as an indicator of soil health and fertility. VWatMicrobAct_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Soil water volume occupied by microbial biomass m3.m-3 Constraints of temperature and water potential on microbial activity refers to how factors such as temperature and water potential can limit the activity of microorganisms in an environmental setting. In particular, temperature can affect microbial metabolism while water potential affects the availability of water for microbial processes.|TFNQ constraints refer to the inhibitory influences of temperature and water potential on microbial activity in the soil ecosystem. Soil temperature and water potential may affect the metabolic activities of microorganisms and, as a result, soil nutrient transformations, organic matter decomposition, and soil gas emissions. The study of these biotic-abiotic interactions is key for understanding the functioning of soil microbial pools and predicting soil responses to environmental changes. TSens4MicbGrwoth_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Constraints of temperature and water potential on microbial activity Cel The fraction of soil pore space that is effectively available for nutrient solute transport and storage, expressed as a dimensionless value between zero and one. This parameter accounts for the tortuosity and connectivity of soil pores that affect nutrient mobility and availability, which is essential for modeling nutrient transport processes and plant uptake in soil systems. trcs_VLN_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Effective volume fraction of nutrient solutes (0-1) 1 The rate of transformation of dissolved inorganic matter into dissolved organic matter through microbial and chemical processes. This conversion represents important biogeochemical transformations where inorganic compounds are incorporated into organic molecules, which influences nutrient cycling, carbon sequestration, and the availability of organic substrates for soil organisms. tRDIM2DOM_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Conversion flux from dissolved inorganic matter into dissolved organic matter g.h-1/{grid} The balance between gas production and consumption processes in soil systems, representing the net rate of gas generation or uptake. This parameter quantifies the overall gas exchange in soils including processes like respiration, methanogenesis, and nitrification minus gas consumption processes, which is crucial for understanding greenhouse gas emissions and atmospheric exchange in terrestrial ecosystems. RGasNetProd_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Net production of gas g.h-1/{grid} A constraint factor that represents the limitation of decomposer organism activity due to insufficient oxygen availability in soil environments. This parameter quantifies how oxygen deficiency reduces the metabolic rates of aerobic decomposer microorganisms, which affects organic matter decomposition rates, nutrient cycling, and carbon turnover in soil ecosystems, particularly in waterlogged or compacted soils. OxyDecompLimiter_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Decomposer oxygen limitation 1 The rate at which decomposer organisms consume oxygen during aerobic respiration and organic matter decomposition processes. This parameter quantifies oxygen consumption by heterotrophic microorganisms involved in breaking down organic substrates, which is essential for understanding soil respiration dynamics, organic matter turnover, and the oxygen budget in terrestrial ecosystems. RO2DecompUptk_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Decomposer oxygen uptake rate g.h-1/{grid} The spatial extent or breadth of the distribution of ammonium (NH4) in a particular area or medium. It is a parameter often measured in soil or water systems to understand the dispersion and concentration of NH4. This information is important in various ecological or environmental contexts, including nutrient cycling, pollution monitoring, and the modeling of biogeochemical processes. BandWidthNH4_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Width of ammonium band m The depth in the soil at which a band or layer of ammonium (NH4) fertilizer is located. This is an important parameter in agriculture and soil science as it can affect the availability of nutrients to plants. BandThicknessNH4_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Depth of ammonium band m The horizontal spatial extent or breadth of the distribution of nitrate in a particular soil area or medium. This parameter is often measured in soil systems to understand the dispersion and concentration patterns of nitrate, which is important for assessing nutrient distribution, fertilizer effectiveness, and potential environmental impacts in agricultural and ecological contexts. BandWidthNO3_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Width of nitrate band m Depth of NO4 band refers to the vertical distance from the surface of the soil to the band or layer of soil where nitrate (NO4) is concentrated or present in significant amounts. This depth can be important in understanding nutrient availability and movement in soils, as well as potential risks of nutrient leaching and groundwater contamination. BandThicknessNO3_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Depth of nitrate band m The horizontal spatial extent or breadth of the distribution of phosphate in a particular soil area or medium. This parameter helps quantify the dispersion and concentration patterns of phosphate ions in soil systems, which is crucial for understanding nutrient availability, fertilizer distribution efficiency, and phosphorus cycling in agricultural and natural ecosystems. BandWidthPO4_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Width of phosphate band m Depth of PO4 band refers to the vertical distance from the surface to a layer in the soil where Phosphate (PO4) is most concentrated. This depth is a crucial parameter for agricultural practices as it helps in understanding the mobility and availability of the nutrient in the soil. BandThicknessPO4_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Depth of phosphate band m Total depth of NH4 band refers to the total depth through which ammonium (NH4) is distributed or contained within a certain band or layer of soil or sediment. This measure provides insight on the vertical distribution of NH4 in soil which is critical in understanding nutrient cycling and availability for plant growth. BandDepthNH4_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total depth of ammonium band m Total depth of NO3 band refers to the vertical thickness or depth of a layer or band of soil where nitrate (NO3) is concentrated or prominent. This measure can contribute to understanding nutrient cycling, soil fertility, and groundwater quality, as NO3 is a key nutrient but can also be a pollutant when it leaches into water bodies. BandDepthNO3_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total depth of nitrate band m The total vertical thickness or depth of a soil layer or band where phosphate compounds are concentrated or most abundant. This measurement provides insight into the three-dimensional distribution of phosphate in soil profiles, which is critical for understanding phosphorus cycling, root access to nutrients, and the potential for phosphorus leaching in terrestrial ecosystems. BandDepthPO4_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total depth of phosphate band m Rate at which nitrite would be consumed by abiotic chemical decomposition, chemodenitrification, if the nitrite supply did not limit it, in soil outside fertilizer bands; the reaction yields nitrous oxide and nitrate. RNO2DmndSoilChemo_vr Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), nitrite correction for issue #79 EcoSIM's ChemoDenitrification (MicBGCFGMod.F90, c5e0ae6) splits the nitrite it consumes 80% to nitrate (RNO3Prod*Chemo), 10% to nitrous oxide (RN2OProd*Chemo, see Chemo nitrous oxide production, BERVO:0000968), and 10% to dissolved organic nitrogen (RNO2ReduxChemo). SoilBGCDataType.txt Total chemodenitrification nitrite uptake non-band unconstrained by NO2 g.h-1/{grid} Rate at which nitrite would be consumed by abiotic chemical decomposition, chemodenitrification, if the nitrite supply did not limit it, in fertilizer bands in soil; the reaction yields nitrous oxide and nitrate. RNO2DmndBandChemo_vr Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), nitrite correction for issue #79 EcoSIM's ChemoDenitrification (MicBGCFGMod.F90, c5e0ae6) splits the nitrite it consumes 80% to nitrate (RNO3Prod*Chemo), 10% to nitrous oxide (RN2OProd*Chemo, see Chemo nitrous oxide production, BERVO:0000968), and 10% to dissolved organic nitrogen (RNO2ReduxChemo). SoilBGCDataType.txt Total chemodenitrification nitrite uptake band unconstrained by NO2 g.h-1/{grid} Soil surface gas dissolution-volatilization refers to the process in which gases exchange between the soil surface and the atmosphere. This parameter describes the net movement of gases, with positive values indicating the dissolution of gases into the soil and negative values indicating the volatilization or release of gases from the soil surface into the atmosphere. trcg_DisolEvap_Atm2Litr_flx Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Soil surface gas net flux g.h-1/{grid} The rate of gas bubble formation and release from soil or sediment when the local gas concentration exceeds solubility limits. This process occurs when negative values indicate active gas bubbling, representing rapid gas escape from saturated conditions, which is important for understanding gas transport in waterlogged soils and sediments and affects greenhouse gas emissions from wetland ecosystems. trcg_ebu_flx_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Active gas bubbling rate g.h-1/{grid} The total gas flux through bubble formation and release integrated across the entire soil column depth. This parameter quantifies the cumulative ebullition process from all soil layers, representing an important pathway for gas transport in saturated soils and sediments, which significantly contributes to greenhouse gas emissions from wetland and aquatic ecosystems. trcg_ebu_flx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Vertically integrated ebullition flux g.h-1/{grid} The rate of gas transport facilitated by plant structures, particularly through root systems and aerenchyma tissues. This process allows gases to move between soil and atmosphere via internal plant air spaces, which is crucial for gas exchange in waterlogged soils and affects both plant respiration and greenhouse gas emissions from vegetated wetland systems. trcg_air2root_flx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Plant-aided gas transport flux g.h-1/{grid} The total rate of hydrogen ion generation through various biogeochemical processes in soil systems. This includes hydrogen ion production from organic acid formation, nitrification, root exudation, and other acidifying processes, which affects soil acidity, nutrient availability, and chemical weathering rates in terrestrial ecosystems. RProd_Hp_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Total hydrogen ion production mol.h-1 The flow of water through the micropores in the soil. This is one of the main processes through which water moves downwards from the surface to deeper levels in the soil, besides macropore flow. Micropores typically have a diameter less than 0.08 mm and are responsible for the soil's water holding capacity and the flow of water and nutrients towards plant roots. They can be found between clay particles and organic matter, and their presence improves soil structure and fertility. WaterFlowSoiMicP_3D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Water flux micropore m3.h-1/{grid} The flow of water through large soil pores, typically greater than 0.08 millimeters in diameter, that provide preferential pathways for rapid water movement. Macropore flow is important for understanding infiltration, drainage, and solute transport processes in soil systems, as it can bypass the soil matrix and significantly influence water and nutrient dynamics in terrestrial ecosystems. WaterFlowSoiMacP_3D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Water flux macropore m3.h-1/{grid} The transfer of thermal energy through micropores via convective processes, where heat is transported by moving fluids within small soil pores. This parameter quantifies heat transport associated with water movement through micropores, which affects soil temperature distribution, thermal conductivity, and energy balance in terrestrial ecosystems. HeatFlow2Soil_3D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Convective heat flux micropore MJ.h-1/{grid} The accumulated difference between gas production processes occurring belowground and the actual gas flux measured at the soil surface over time. This parameter represents the net gas storage or release within the soil profile, which helps quantify gas accumulation or depletion in soil systems and is important for understanding greenhouse gas budgets in terrestrial ecosystems. Gas_Prod_TP_cumRes_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Cumulative difference in gas belowground production and surface flux g/{grid} The movement of dissolved tracer compounds through small soil pores, typically less than 0.08 millimeters in diameter. This parameter quantifies solute transport through the micropore network, which is important for understanding contaminant movement, nutrient transport, and chemical fate in soil systems where molecular diffusion and slow advection dominate transport processes. trcs_TransptMicP_3D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Tracer solute transport in micropore g.h-1/{grid} The amount of dissolved organic carbon (DOC) flowing through soil micropores. DOC is a component of the soil organic matter and represents a substantial pool of terrestrial carbon. It contributes to various soil functions and processes, and its dynamics are important in understanding carbon cycling in the environment. Micropores, the smallest pores in soil (< 0.05 mm), allow the transport of water and DOC. Thus, the flux of DOC in these micropores is an important aspect of carbon distribution and movement within the soil. DOM_MicpTransp_3D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Dissolved organic carbon flux micropore g.h-1/{grid} The deposition of gaseous compounds to soil surfaces through wet precipitation processes including irrigation and rainfall events. This parameter quantifies the input of atmospheric gases dissolved in water that reach the soil, which contributes to nutrient inputs, chemical loading, and biogeochemical cycling in terrestrial ecosystems. Gas_WetDeposit_flx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Wet gas deposition due to irrigation and rainfall g.h-1/{grid} The pressure exerted by gases within soil pore spaces, which affects gas movement, solubility, and exchange processes. This parameter influences gas transport between soil layers and between soil and atmosphere, and is important for understanding gas dynamics, root respiration, and greenhouse gas emissions in terrestrial ecosystems. Soil_Gas_pressure_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Soil gas pressure Pa The volume fraction of carbon dioxide gas present in soil pore spaces, typically expressed in parts per million by volume. This parameter quantifies the concentration of carbon dioxide in soil air, which reflects respiration processes, organic matter decomposition, and root activity, and is crucial for understanding soil carbon cycling and greenhouse gas dynamics. CO2_Gas_Frac_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Volumetric concentration of gaseous carbon dioxide [ppm]{vol} The volume fraction of oxygen gas present in soil pore spaces, typically expressed in parts per million by volume. This parameter quantifies soil aeration status and oxygen availability for aerobic processes, which affects root respiration, microbial activity, and organic matter decomposition rates in terrestrial ecosystems. O2_Gas_Frac_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Volumetric concentration of gaseous oxygen [ppm]{vol} The volume fraction of argon gas present in soil pore spaces, typically expressed in parts per million by volume. This parameter is often used as an inert tracer gas to study soil gas transport processes and calculate gas diffusion rates, as argon is chemically unreactive and provides insight into physical gas movement in terrestrial ecosystems. Ar_Gas_frac_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Volumetric concentration of argon gas [ppm]{vol} The volume fraction of methane gas present in soil pore spaces, typically expressed in parts per million by volume. This parameter quantifies methane concentration in soil air, which reflects anaerobic decomposition processes and methanogenic activity, and is important for understanding greenhouse gas emissions and carbon cycling in waterlogged and anaerobic soil environments. CH4_gas_frac_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Volumetric concentration of methane gas [ppm]{vol} The rate of methane production through hydrogenotrophic methanogenesis, where methanogens use hydrogen and carbon dioxide as substrates. This pathway represents one of the two main routes of biological methane formation in anaerobic environments, and is particularly important in freshwater wetlands and rice paddies where hydrogen availability can limit methanogenic activity. RCH4ProdHydrog_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Hydrogenotrophic methane production rate g{C}.h-1/{grid} The rate of methane production through acetoclastic methanogenesis, where methanogens directly split acetate into methane and carbon dioxide. This pathway represents the other major route of biological methane formation in anaerobic environments, and typically dominates in organic-rich sediments and soils where acetate availability is high. RCH4ProdAcetcl_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Acetoclastic methane production rate g{C}.h-1/{grid} The rate at which methane is oxidized to carbon dioxide by methanotrophic bacteria under aerobic conditions. This process represents an important methane sink in terrestrial ecosystems, particularly in the oxic zones of soils and sediments, and significantly reduces methane emissions to the atmosphere from natural and agricultural systems. RCH4Oxi_aero_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Aerobic methane oxidation rate g{C}.h-1/{grid} The rate of anaerobic decomposition of organic matter through fermentation processes, where complex organic compounds are broken down into simpler molecules without oxygen. This process produces various organic acids, alcohols, and gases, and represents a crucial step in carbon cycling under anaerobic conditions in waterlogged soils and sediments. RFerment_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Fermentation rate g{C}.h-1/{grid} The rate at which ammonia is oxidized to nitrite and subsequently to nitrate through nitrification processes carried out by ammonia-oxidizing bacteria and archaea. This process is the first step in nitrification and represents an important pathway for nitrogen transformation in soils, affecting nitrogen availability and contributing to nitrous oxide emissions in terrestrial ecosystems. RNH3oxi_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Ammonia oxidation rate g{N}.h-1/{grid} The rate of nitrous oxide production during denitrification processes, where nitrate and nitrite are reduced under anaerobic conditions. This process represents an important source of nitrous oxide emissions from soils, particularly in waterlogged or oxygen-limited environments, and is a key component of the nitrogen cycle in terrestrial ecosystems. RN2ODeniProd_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Denitrification nitrous oxide production g{N}.h-1/{grid} The rate of nitrous oxide production during nitrification processes, where ammonia is oxidized to nitrate with nitrous oxide as a byproduct. This process represents a significant source of nitrous oxide emissions from agricultural soils and is influenced by factors such as soil moisture, temperature, and nitrogen availability in terrestrial ecosystems. RN2ONitProd_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Nitrification nitrous oxide production rate g{N}.h-1/{grid} The rate of nitrous oxide production through abiotic chemical processes, such as chemical decomposition of nitrite under acidic conditions. This process represents non-biological nitrous oxide formation that can occur independently of microbial activity, and contributes to total nitrous oxide emissions from soils, particularly under specific chemical conditions. RN2OChemoProd_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Chemo nitrous oxide production g{N}.h-1/{grid} The rate at which nitrous oxide is reduced to nitrogen gas during the final step of denitrification processes. This reaction represents an important sink for nitrous oxide in anaerobic soils and sediments, and its efficiency affects the ratio of nitrous oxide to nitrogen gas emissions from terrestrial ecosystems. RN2ORedux_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Nitrous oxide reduction into nitrogen gas g{N}.h-1/{grid} The rate at which dissolved organic matter is lost from soil systems through subsurface water drainage pathways. This process represents an important mechanism of carbon and nutrient export from terrestrial ecosystems to groundwater and surface water bodies, affecting soil fertility and downstream water quality. DOM_draing_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Dissolved organic matter loss through subsurface drainage g.h-1/{grid} The rate at which dissolved solutes are lost from soil systems through subsurface drainage pathways including groundwater flow and lateral subsurface flow. This process represents an important mechanism of nutrient and contaminant transport from terrestrial ecosystems to aquatic systems, affecting both soil fertility and water quality. trcs_drainage_flx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Solute loss through subsurface drainage g.h-1/{grid} The rate at which dissolved organic matter is lost from soil systems through surface water runoff during precipitation or irrigation events. This process represents an important pathway for carbon and nutrient export from terrestrial ecosystems to surface water bodies, contributing to stream and river chemistry and affecting downstream aquatic productivity. DOM_SurfRunoff_flx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilBGCDataType.txt Dissolved organic matter loss through surface runoff g.h-1/{grid} The total surface area encompassed by a landscape unit or grid cell in Earth system models. This parameter defines the spatial extent of terrestrial ecosystems being modeled and is fundamental for scaling ecosystem processes, calculating mass and energy fluxes, and linking plot-scale measurements to larger spatial scales in environmental and climate modeling applications. TAREA Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt Total area of landscape m2 The vertical distance from the soil surface to the bottom boundary of a specific soil layer within a grid cell. This parameter defines the lower extent of soil layers and is essential for modeling three-dimensional soil processes, calculating layer-specific properties, and determining the spatial distribution of biogeochemical processes in terrestrial ecosystem models. BOTDEP CumDepz2LayBottom_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt HWSD2: BOTDEP [cm]. Depth to bottom of soil layer cm m The vertical extent or depth of an individual soil layer within a three-dimensional grid system. This parameter determines the volume of soil available for biogeochemical processes and affects the resolution of soil modeling, influencing calculations of carbon storage, nutrient cycling, and water movement in terrestrial ecosystem models. DLYR_3D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt Thickness of soil layer m The spatial extent of a soil layer measured in all three spatial dimensions within a three-dimensional grid system. This parameter provides complete geometric information about soil layer volumes and is used for calculating three-dimensional transport processes, spatial averaging of soil properties, and modeling anisotropic soil processes in terrestrial ecosystems. DLYRI_3D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt Thickness of soil layer in 3 directions m The cross-sectional area divided by the distance between adjacent grid cells in a three-dimensional modeling framework. This parameter is used to calculate flow rates and transport processes between grid cells, particularly for modeling lateral movement of water, nutrients, and other substances in spatially explicit terrestrial ecosystem models. XDPTH_3D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt Cross-sectional area / distance between adjacent grid cells m The vertical distance from the soil surface to the center point of a specific soil layer. This parameter represents the characteristic depth for layer-specific calculations and is used for assigning depth-dependent properties, modeling vertical gradients, and determining representative conditions within each soil layer in terrestrial ecosystem models. SoilDepthMidLay_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt Depth to middle of soil layer m The cumulative vertical distance from the top surface of a grid cell to the bottom boundary of a specific soil layer. This parameter provides absolute depth information for soil layers and is essential for modeling depth-dependent processes, calculating soil profiles, and linking surface conditions to subsurface processes in terrestrial ecosystems. CumSoilThickness_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt Depth to bottom of soil layer from surface of grid cell m The cumulative vertical distance from the top surface of a grid cell to the center point of a specific soil layer. This parameter provides the absolute depth to layer midpoints and is used for depth-weighted calculations, modeling vertical transport processes, and representing characteristic conditions within soil layers in terrestrial ecosystem models. CumSoilThickMidL_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt Depth to middle of soil layer from surface of grid cell m The area of the interface between adjacent grid cells or the cross-sectional area available for transport processes in a three-dimensional modeling system. This parameter is fundamental for calculating flow rates, mass transfer, and exchange processes between spatial units in terrestrial ecosystem models. AREA_3D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt Cross-sectional area m2/{grid} The separation distance between the centers of adjacent grid cells or layers in three-dimensional space, with directional codes indicating East-West, North-South, or vertical orientation. This parameter is essential for calculating transport rates, diffusion processes, and spatial gradients in three-dimensional terrestrial ecosystem models. DIST_3D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt Distance between adjacent layers:1=EW,2=NS,3=vertical m The numerical index identifying the uppermost soil layer in a vertically discretized soil profile within a grid cell. This parameter defines the top boundary of the soil column and is used for indexing surface processes, boundary conditions, and the starting point for vertical transport calculations in terrestrial ecosystem models. NU_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt Soil surface layer number 1 The original numerical index of the uppermost soil layer at the beginning of a model simulation or time period. This parameter preserves the initial soil structure information and is used for tracking changes in soil layering, erosion and deposition processes, and maintaining consistency in long-term ecosystem modeling applications. NUI_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt Initial soil surface layer number 1 The numerical index of the deepest soil layer that contains plant roots within a grid cell. This parameter defines the maximum rooting depth and is crucial for modeling plant water and nutrient uptake, root-soil interactions, and the vertical extent of plant influence on soil biogeochemical processes in terrestrial ecosystems. MaxNumRootLays_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt Maximum root layer number 1 The number of additional soil layers added to the bottom of the soil profile to extend the modeling domain. This parameter allows for dynamic adjustment of soil column depth and is important for capturing deep soil processes, groundwater interactions, and ensuring adequate boundary conditions in terrestrial ecosystem models. NK_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt Additional soil lower boundary layers 1 The original numerical index of the bottommost soil layer at the beginning of a model simulation or time period. This parameter preserves information about the initial soil profile structure and is used for tracking changes in soil depth, boundary conditions, and maintaining consistency in long-term terrestrial ecosystem modeling. NLI_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt Initial lowest soil layer number 1 The current numerical index of the bottommost soil layer in a vertically discretized soil profile within a grid cell. This parameter defines the lower boundary of the active soil column and is essential for setting boundary conditions, calculating total soil properties, and defining the extent of soil processes in terrestrial ecosystem models. NL_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt Lowest soil layer number 1 The updated numerical index of the uppermost soil layer after dynamic changes such as erosion, deposition, or layer restructuring. This parameter tracks modifications to the soil surface and is important for maintaining accurate soil layering, boundary conditions, and surface process calculations in dynamic terrestrial ecosystem models. NUM_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt New surface layer number 1 The original depth from the surface to the bottom boundary of the litter layer at the beginning of a model simulation. This parameter defines the initial thickness of the organic surface layer and is important for modeling litter decomposition, carbon cycling, and the transition between surface organic matter and mineral soil in terrestrial ecosystems. CumLitRDepzInit_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt Initial position of the bottom of litter layer m The angular distance north or south of the Earth's equator expressed in degrees, specifying the geographic location of a grid cell. This parameter is fundamental for determining solar radiation patterns, climate conditions, day length, and seasonal variations that drive ecosystem processes in Earth system models. ALAT_col Consider addition of Longitude Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt Latitude measurement deg The horizontal spatial extent of grid cells in the east-west direction, defining the longitudinal dimension of modeling units. This parameter determines the spatial resolution and scale of ecosystem processes and is essential for calculating area-based fluxes, scaling local processes, and linking to atmospheric and hydrological models. DH_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt East-West width of the grid cells m The horizontal spatial extent of grid cells in the north-south direction, defining the latitudinal dimension of modeling units. This parameter determines the spatial resolution and affects the representation of climate gradients, ecosystem heterogeneity, and the scaling of biogeochemical processes in terrestrial ecosystem models. DV_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt North-South width of the grid cells m A dimensional parameter indicating the direction or characteristic of low-lying areas within a grid cell, typically used for hydrological flow routing calculations. This parameter helps identify drainage patterns, water accumulation zones, and flow directions that are essential for modeling surface water movement and solute transport in terrestrial landscapes. FlowDirIndicator_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) GridDataType.txt Dimension of flow 1 The mass of specific chemical elements contained within heterotrophic microbial biomass in soil systems. This parameter quantifies the elemental composition of microbial communities and is essential for understanding nutrient cycling, microbial stoichiometry, and the role of microorganisms in biogeochemical processes within terrestrial ecosystems. mBiomeHeter_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Microbial biomass chemical element g/{grid} Rate at which aerobic heterotrophic microbes would take up dissolved oxygen to oxidise dissolved organic carbon and acetate, before the oxygen supply limits it, resolved by functional guild and organic matter complex in the surface litter and each soil layer. Aqueous demand RO2DmndHetert RO2DmndHetert_vr Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) EcoSIM stores this as RO2DmndHetert_vr in MicrobialDataType; RO2DmndHetert is its working copy inside the microbial model. EcoSIM sets it to zero for the anaerobic heterotrophic guilds (acetogenic fermenters, acetogenic nitrogen fixers and acetotrophic methanogens), and sums it with the demand of roots and other microbes into Total root + microbial oxygen uptake (BERVO:0000409). Interesting units. These items below appear to be chemical rates MicrobialDataType.txt Aqueous oxygen demand by heterotrophic microbes g.h-1/{grid} Net Microbial DOC flux refers to the net movement or transfer of Dissolved Organic Carbon (DOC) mediated by microbes across a certain area over a specified period of time. This plays a vital role in the carbon cycle as DOC represents a significant fraction of total organic carbon in most ecosystems. RDOCUptkHeter_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Net microbial dissolved organic carbon flux g.h-1/{grid} Net microbial acetate flux refers to the net change in the amount of acetate, a key intermediate in many biological processes, due to microbial activity. This is an important measure in microbial ecology and biogeochemistry, as acetate fluxes can have significant impacts on various environmental processes and nutrient cycling. RAcetateUptkHeter_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Net microbial acetate flux g.h-1/{grid} The rate at which heterotrophic microorganisms require ammonium for growth and metabolic processes in soil environments. This parameter quantifies microbial nitrogen demand and is essential for understanding competition between plants and microbes for nitrogen, nutrient immobilization processes, and nitrogen cycling dynamics in terrestrial ecosystems. RNH4DmndSoilHeter_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Heterotrophic microbial ammonium demand in soil g.h-1/{grid} The rate at which heterotrophic microorganisms require nitrate for growth and metabolic processes in soil environments. This parameter quantifies microbial utilization of oxidized nitrogen forms and is important for understanding denitrification potential, competition for nitrate between plants and microbes, and nitrogen cycling in terrestrial ecosystems. RNO3DmndSoilHeter_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Heterotrophic microbial nitrate demand in soil g.h-1/{grid} The rate at which heterotrophic microorganisms require phosphate for growth and metabolic processes in soil environments. This parameter quantifies microbial phosphorus demand and is crucial for understanding competition between plants and microbes for phosphorus, nutrient immobilization, and phosphorus cycling dynamics in terrestrial ecosystems. RH2PO4DmndSoilHeter_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Heterotrophic microbial phosphate demand in soil g.h-1/{grid} The rate at which heterotrophic microorganisms require ammonium for decomposition and metabolic processes in surface litter layers. This parameter quantifies nitrogen demand during litter decomposition and is important for understanding nutrient release patterns, immobilization processes, and nitrogen cycling in the surface organic layers of terrestrial ecosystems. RNH4DmndLitrHeter_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Heterotrophic microbial ammonium demand in surface litter g.h-1/{grid} The rate at which heterotrophic microorganisms require phosphate for decomposition and metabolic processes in surface litter layers. This parameter quantifies phosphorus demand during litter decomposition and is essential for understanding nutrient release patterns, immobilization processes, and phosphorus cycling in surface organic matter of terrestrial ecosystems. RH2PO4DmndLitrHeter_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Heterotrophic microbial phosphate demand in surface litter g.h-1/{grid} The rate at which heterotrophic microorganisms require nitrate for decomposition and metabolic processes in surface litter layers. This parameter quantifies nitrate utilization during litter decomposition and is important for understanding oxidized nitrogen cycling, denitrification potential, and nutrient dynamics in surface organic layers of terrestrial ecosystems. RNO3DmndLitrHeter_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Heterotrophic microbial nitrate demand in surface litter g.h-1/{grid} Total heterotrophic microbial nitrate uptake non-band unconstrained by nitrate represents the maximum rate of nitrate consumption by heterotrophic microorganisms in non-banded soil areas when nitrate availability is not limiting. This parameter quantifies microbial denitrification potential and is crucial for understanding nitrogen cycling, greenhouse gas production, and competition between plants and microbes for nitrogen resources in terrestrial ecosystems. RNO3ReduxDmndSoilHeter_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Total heterotrophic microbial nitrate uptake non-band unconstrained by NO3 g.h-1/{grid} Rate at which heterotrophic microbes would take up nitrite for reduction in denitrification if the nitrite supply did not limit them, in soil outside fertilizer bands. RNO2DmndReduxSoilHeter_vr Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), nitrite correction for issue #79 MicrobialDataType.txt Total heterotrophic microbial nitrite uptake non-band unconstrained by NO2 g.h-1/{grid} Total heterotrophic microbial nitrate uptake in band soil unconstrained by nitrate represents the maximum rate of nitrate consumption by heterotrophic microorganisms in fertilizer-banded soil areas when nitrate availability is not limiting. This parameter quantifies enhanced microbial denitrification potential in nutrient-rich bands and is essential for understanding localized nitrogen cycling, fertilizer efficiency, and greenhouse gas emissions in agricultural systems. RNO3ReduxDmndBandHeter_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Total heterotrophic microbial nitrate uptake in band soil unconstrained by NO3 g.h-1/{grid} Rate at which heterotrophic microbes would take up nitrite for reduction in denitrification if the nitrite supply did not limit them, in fertilizer bands in soil. RNO2DmndReduxBandHeter_vr Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), nitrite correction for issue #79 MicrobialDataType.txt Total heterotrophic microbial nitrite uptake in band soil unconstrained by NO2 g.h-1/{grid} Total heterotrophic microbial nitrous oxide uptake unconstrained by nitrous oxide represents the maximum rate of nitrous oxide consumption by heterotrophic microorganisms when nitrous oxide availability is not limiting. This parameter quantifies the potential for microbial nitrous oxide reduction to nitrogen gas during the final step of denitrification, which is crucial for understanding greenhouse gas mitigation and nitrogen cycling in terrestrial ecosystems. RN2ODmndReduxHeter_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Total heterotrophic microbial nitrous oxide uptake unconstrained by N2O g.h-1/{grid} Heterotrophic microbial ammonium immobilization-mineralization in band soil represents the net balance between ammonium uptake by microorganisms (positive values) and ammonium release through decomposition (negative values) in fertilizer-banded areas. This parameter quantifies the dynamic exchange of ammonium between microbial biomass and soil solution, which affects nitrogen availability for plants and overall nitrogen cycling in agricultural systems. RNH4DmndBandHeter_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Heterotrophic microbial ammonium immobilization (+ve) - mineralization (-ve) in band soil g.h-1/{grid} Heterotrophic microbial nitrate immobilization-mineralization in band soil represents the net balance between nitrate uptake by microorganisms (positive values) and nitrate release (negative values) in fertilizer-banded areas. This parameter quantifies the competition between microbial assimilation and nitrogen availability for plants, which is crucial for understanding fertilizer efficiency and nitrogen management in agricultural systems. RNO3DmndBandHeter_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Heterotrophic microbial nitrate immobilization (+ve) - mineralization (-ve) in band soil g.h-1/{grid} Heterotrophic substrate-unlimited dihydrogen phosphate mineralization-immobilization in band soil represents the net balance between phosphate release and uptake by heterotrophic microorganisms when not limited by carbon substrate availability. This parameter quantifies phosphorus cycling dynamics in fertilizer-banded areas and is essential for understanding phosphorus availability, microbial competition, and nutrient management in agricultural ecosystems. RH2PO4DmndBandHeter_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Heterotrophic substrate-unlimited dihydrogen phosphate mineraln-immobiln in band soil g.h-1/{grid} Heterotrophic substrate-unlimited hydrogen phosphate immobilization in non-band soil represents the uptake of hydrogen phosphate by heterotrophic microorganisms when not limited by carbon substrate availability. This parameter quantifies microbial phosphorus demand in non-fertilized soil areas and is important for understanding phosphorus competition between plants and microbes in natural terrestrial ecosystems. RH1PO4DmndSoilHeter_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Heterotrophic substrate-unlimited hydrogen phosphate immobilization in non-band soil g.h-1/{grid} Heterotrophic substrate-unlimited hydrogen phosphate mineralization-immobilization in band soil represents the net balance between hydrogen phosphate release and uptake by heterotrophic microorganisms when not limited by carbon substrates. This parameter quantifies phosphorus cycling dynamics in fertilizer-banded areas and affects phosphorus availability for plant uptake and overall nutrient management in agricultural systems. RH1PO4DmndBandHeter_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Heterotrophic substrate-unlimited hydrogen phosphate mineraln-immobiln in band soil g.h-1/{grid} Heterotrophic substrate-unlimited hydrogen phosphate immobilization in surface litter represents the uptake of hydrogen phosphate by heterotrophic microorganisms during litter decomposition when not limited by carbon substrates. This parameter quantifies phosphorus demand during organic matter decomposition and is crucial for understanding nutrient cycling and phosphorus availability in surface organic layers of terrestrial ecosystems. RH1PO4DmndLitrHeter_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Heterotrophic substrate-unlimited hydrogen phosphate immobilization in surface litter g.h-1/{grid} Heterotrophic microbial carbon loss through erosion quantifies the rate at which carbon contained in heterotrophic microbial biomass is removed from soil systems through erosion processes. This parameter represents an important pathway of carbon export from terrestrial ecosystems and affects soil fertility, carbon storage, and the transport of organic matter to aquatic systems. OMEERhetr_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Heterotrophic microbial carbon loss through erosion g.h-1/{grid} Autotrophic microbial biomass chemical element quantifies the mass of specific chemical elements contained within autotrophic microbial biomass in soil systems. This parameter represents the elemental composition of nitrifying bacteria and other chemosynthetic microorganisms and is essential for understanding nitrogen cycling, microbial stoichiometry, and nutrient transformations in terrestrial ecosystems. mBiomeAutor_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Autotrophic microbial biomass chemical element g/{grid} Rate at which autotrophic microbes would take up dissolved oxygen for gross respiration and for oxidising their substrate (ammonium, nitrite or methane), before the oxygen supply limits it, resolved by functional guild in the surface litter and each soil layer. Aqueous demand by autotrophic microbes RO2DmndAutort_vr RO2MetaDmndAutor_vr Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) EcoSIM renamed RO2DmndAutort_vr to RO2MetaDmndAutor_vr in October 2025 (commit 64e2e2a), declared as aqueous O2 demand by metabolism of autotrophic microbes. Of EcoSIM's six autotrophic groups, only the ammonia oxidisers, nitrite oxidisers and aerobic methane oxidisers have a demand. It is zero for the hydrogenotrophic methanogens, which set it to zero, and for the two anaerobic methane oxidisers (ANME-2d and NC10), which leave it at its reset value of zero. MicrobialDataType.txt Aqueous oxygen demand by autotrophic microbes g.h-1/{grid} Autotrophic microbial ammonium demand in soil represents the rate at which autotrophic microorganisms, primarily ammonia-oxidizing bacteria and archaea, require ammonium for nitrification processes. This parameter quantifies the first step of nitrification and is crucial for understanding nitrogen transformations, competition for ammonium between plants and nitrifiers, and nitrous oxide production in terrestrial ecosystems. RNH4UptkSoilAutor_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Autotrophic microbial ammonium demand in soil g.h-1/{grid} Autotrophic microbial nitrate demand in soil represents the rate at which autotrophic microorganisms require nitrate for growth and metabolic processes, particularly nitrite-oxidizing bacteria that complete the nitrification process. This parameter quantifies the second step of nitrification and is important for understanding nitrogen cycling, nitrate production, and microbial nutrient requirements in terrestrial ecosystems. RNO3UptkSoilAutor_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Autotrophic microbial nitrate demand in soil g.h-1/{grid} Autotrophic microbes dihydrogen phosphate demand in soil represents the rate at which autotrophic microorganisms require dihydrogen phosphate for growth and metabolic processes including nitrification. This parameter quantifies phosphorus requirements of nitrifying bacteria and other chemosynthetic microbes and is important for understanding nutrient limitations and competition for phosphorus in terrestrial ecosystems. RH2PO4UptkSoilAutor_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Autotrophic microbes dihydrogen phosphate demand in soil g.h-1/{grid} Autotrophic microbial ammonium demand in surface litter represents the rate at which ammonia-oxidizing bacteria and archaea require ammonium for nitrification processes in litter layers. This parameter quantifies nitrogen oxidation in organic surface layers and is important for understanding nitrogen cycling, acidification processes, and microbial activity in the litter-soil interface of terrestrial ecosystems. RNH4UptkLitrAutor_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Autotrophic microbial ammonium demand in surface litter g.h-1/{grid} Autotrophic microbial dihydrogen phosphate demand in surface litter represents the rate at which nitrifying bacteria require dihydrogen phosphate for growth and metabolic processes during litter decomposition. This parameter quantifies phosphorus requirements of autotrophic microbes in organic surface layers and is crucial for understanding nutrient cycling and microbial competition in the litter-soil interface. RH2PO4UptkLitrAutor_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Autotrophic microbial dihydrogen phosphate demand in surface litter g.h-1/{grid} Autotrophic microbial nitrate demand in surface litter represents the rate at which nitrite-oxidizing bacteria require nitrate for growth and metabolic processes in litter layers. This parameter quantifies the completion of nitrification processes in organic surface layers and is important for understanding nitrogen cycling, nitrate production, and microbial succession during litter decomposition in terrestrial ecosystems. RNO3UptkLitrAutor_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Autotrophic microbial nitrate demand in surface litter g.h-1/{grid} Autotrophic ammonia oxidation in non-band soil represents the rate at which ammonia-oxidizing bacteria and archaea convert ammonia to nitrite in non-fertilized soil areas. This parameter quantifies the first step of nitrification and is fundamental for understanding nitrogen cycling, soil acidification, and nitrous oxide production in natural terrestrial ecosystems. RNH3OxidAutor_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Autotrophic ammonia oxidation in non-band soil g.h-1/{grid} Rate of oxidation of nitrite to nitrate by autotrophic nitrite-oxidizing bacteria, the second step of nitrification, in soil outside fertilizer bands. RNO2OxidAutor_vr Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), nitrite correction for issue #79 MicrobialDataType.txt Autotrophic nitrite oxidation in non-band soil g.h-1/{grid} Autotrophic ammonia oxidation in band soil represents the rate at which ammonia-oxidizing bacteria and archaea convert ammonia to nitrite in fertilizer-banded soil areas. This parameter quantifies enhanced nitrification rates in nutrient-rich zones and is crucial for understanding fertilizer efficiency, localized nitrogen cycling, and nitrous oxide emissions in agricultural systems. RNH3OxidAutorBand_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Autotrophic ammonia oxidation in band soil g.h-1/{grid} Rate of oxidation of nitrite to nitrate by autotrophic nitrite-oxidizing bacteria, the second step of nitrification, in fertilizer bands in soil. RNO2OxidAutorBand_vr Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), nitrite correction for issue #79 MicrobialDataType.txt Autotrophic nitrite oxidation in band soil g.h-1/{grid} Autotrophic microbial nitrous oxide demand for reduction represents the rate at which autotrophic microorganisms require nitrous oxide for reduction processes during anaerobic respiration. This parameter quantifies the potential for autotrophic denitrification and nitrous oxide consumption, which is important for understanding greenhouse gas mitigation and alternative metabolic pathways in oxygen-limited soil environments. RN2ODmndReduxAutor_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Autotrophic microbial nitrous oxide demand for reduction g.h-1/{grid} Autotrophic microbial ammonium demand in band soil represents the rate at which ammonia-oxidizing bacteria and archaea require ammonium for nitrification processes in fertilizer-banded areas. This parameter quantifies enhanced microbial nitrogen oxidation in nutrient-rich zones and is crucial for understanding fertilizer utilization, localized acidification, and nitrogen transformation efficiency in agricultural systems. RNH4UptkBandAutor_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Autotrophic microbial ammonium demand in band soil g.h-1/{grid} Autotrophic microbial nitrate demand in band soil represents the rate at which nitrite-oxidizing bacteria require nitrate for growth and metabolic processes in fertilizer-banded areas. This parameter quantifies enhanced nitrate utilization by autotrophic microbes in nutrient-rich zones and is important for understanding microbial competition and nitrogen cycling dynamics in agricultural systems. RNO3UptkBandAutor_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Autotrophic microbial nitrate demand in band soil g.h-1/{grid} Autotrophic microbial dihydrogen phosphate demand in band soil represents the rate at which nitrifying bacteria require dihydrogen phosphate for growth and metabolic processes in fertilizer-banded areas. This parameter quantifies enhanced phosphorus utilization by autotrophic microbes in nutrient-rich zones and is crucial for understanding nutrient competition and microbial activity in agricultural systems. RH2PO4UptkBandAutor_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Autotrophic microbial dihydrogen phosphate demand in band soil g.h-1/{grid} Autotrophic microbial hydrogen phosphate demand in non-band soil represents the rate at which nitrifying bacteria require hydrogen phosphate for growth and metabolic processes in non-fertilized soil areas. This parameter quantifies phosphorus requirements of autotrophic microbes in natural soil conditions and is important for understanding nutrient limitations and microbial ecology in terrestrial ecosystems. RH1PO4UptkSoilAutor_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Autotrophic microbial hydrogen phosphate demand in non-band soil g.h-1/{grid} Autotrophic microbial hydrogen phosphate demand in band soil represents the rate at which nitrifying bacteria require hydrogen phosphate for growth and metabolic processes in fertilizer-banded areas. This parameter quantifies enhanced phosphorus utilization by autotrophic microbes in nutrient-rich zones and is crucial for understanding nutrient cycling and microbial competition in agricultural systems. RH1PO4UptkBandAutor_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Autotrophic microbial hydrogen phosphate demand in band soil g.h-1/{grid} Autotrophic microbial hydrogen phosphate demand in surface litter represents the rate at which nitrifying bacteria require hydrogen phosphate for growth and metabolic processes during litter decomposition. This parameter quantifies phosphorus requirements of autotrophic microbes in organic surface layers and is important for understanding nutrient cycling and microbial succession in the litter-soil interface of terrestrial ecosystems. RH1PO4UptkLitrAutor_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicrobialDataType.txt Autotrophic microbial hydrogen phosphate demand in surface litter g.h-1/{grid} The rate of removal of self-feeding microbial biomass from soil or sediment surfaces due to physical erosion processes caused by water or wind. This parameter quantifies how soil erosion affects microbial communities that contribute to primary productivity and nutrient cycling, representing an important loss pathway for soil organic matter and ecosystem functioning in eroding landscapes. OMEERauto_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) MicrobialDataType.txt Autotrophic microbial biomass loss through erosion g.h-1/{grid} Thinning of plant population refers to the process of reducing the density or abundance of plants within a given area. It involves selectively removing certain individuals or groups of plants to create more space and resources for the remaining plants to grow and thrive. Thinning can be done manually or through natural processes such as competition, predation, or disease. The purpose of thinning plant populations in earth systems modeling is to simulate realistic vegetation dynamics, including changes in species composition, productivity, and ecosystem functioning. THIN_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Thinning of plant population 1 Harvest efficiency refers to the proportion of yield that is successfully harvested from the total available crop. It is a crucial parameter in agricultural systems modelling, influencing yield predictions and management strategies. FracBiomHarvsted Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Harvest efficiency 1 Harvest cutting height or fractional Leaf Area Index (LAI) removal refers to the parameter used in agricultural and ecosystem modelling to denote the height at which crops are cut during harvesting or the fraction of LAI that is removed. When positive, it represents the cutting height in harvesting, and when negative, it represents the fractional removal of LAI. This is used to estimate the biomass yield and the impact of the harvest on the remaining crop and soil nutrient balance. FracCanopyHeightCut_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Harvest cutting height (+ve) or fractional LAI removal (-ve) m Type of harvest represents a categorical variable that specifies the method or approach used for harvesting plant material in agricultural or forestry systems. This parameter distinguishes between different harvesting strategies such as clear-cutting, selective harvesting, or partial removal, which affects biomass yield, ecosystem recovery, and management outcomes in terrestrial vegetation models. iHarvstType_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Type of harvest NA Flag for stand replacing disturbance is a binary indicator that identifies whether a disturbance event completely removes or replaces the existing vegetation stand. This parameter distinguishes between partial disturbances and complete stand replacement events such as clear-cut harvesting, severe fires, or major storms, which is crucial for modeling vegetation succession and ecosystem recovery dynamics. jHarvst_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Flag for stand replacing disturbance NA Year of planting specifies the calendar year when vegetation was established or planted in a particular location or management unit. This temporal parameter is essential for tracking vegetation age, growth stages, and development cycles, and is crucial for modeling plant phenology, biomass accumulation, and management scheduling in agricultural and forestry systems. iYearPlanting_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Year of planting NA Year of harvest specifies the calendar year when vegetation was harvested or removed from a particular location or management unit. This temporal parameter tracks the timing of biomass removal events and is essential for modeling harvest cycles, carbon storage changes, and ecosystem disturbance impacts in agricultural and forestry management systems. iYearPlantHarvest_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Year of harvest NA Day of planting specifies the day of year when vegetation was established or planted, typically expressed as a Julian day number from 1 to 365. This parameter provides precise timing for planting events and is crucial for modeling seasonal phenology, growth initiation, and the relationship between planting timing and environmental conditions in agricultural systems. iDayPlanting_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Day of planting NA Day of harvest specifies the day of year when vegetation was harvested or removed, typically expressed as a Julian day number from 1 to 365. This parameter provides precise timing for harvest events and is essential for modeling seasonal management practices, biomass removal timing, and the impacts of harvest scheduling on ecosystem processes and productivity. iDayPlantHarvest_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Day of harvest NA Flag for species death is a binary indicator that identifies whether a plant functional type or species has died or become inactive within a modeling unit. This parameter tracks vegetation mortality events and is crucial for modeling vegetation dynamics, succession processes, and the impacts of environmental stress or disturbance on plant community composition. iPlantState_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Flag for species death NA Alternate year of planting specifies an alternative calendar year for vegetation establishment when multiple planting scenarios or rotational systems are considered. This parameter allows for flexible management scheduling and is important for modeling crop rotations, replanting strategies, and alternative management scenarios in agricultural and forestry systems. iPlantingYear_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Alternate year of planting NA Alternate day of planting specifies an alternative day of year for vegetation establishment when multiple planting scenarios or timing options are considered. This parameter provides flexibility in management scheduling and is crucial for modeling sensitivity to planting dates, climate variability impacts, and alternative management strategies in agricultural systems. iPlantingDay_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Alternate day of planting NA Alternate year of harvest specifies an alternative calendar year for vegetation harvesting when multiple harvest scenarios or rotational systems are considered. This parameter enables modeling of flexible harvest scheduling and is important for understanding the impacts of harvest timing variability on ecosystem productivity and carbon cycling in managed terrestrial systems. iHarvestYear_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Alternate year of harvest NA Alternate day of harvest specifies an alternative day of year for vegetation harvesting when multiple harvest scenarios or timing options are considered. This parameter provides flexibility in harvest scheduling and is essential for modeling the sensitivity of ecosystem processes to harvest timing and evaluating alternative management strategies in agricultural and forestry systems. iHarvestDay_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Alternate day of harvest NA Total carbon dioxide flux from fire quantifies the amount of carbon dioxide gas released to the atmosphere during combustion events in terrestrial ecosystems. This parameter represents the largest component of fire emissions and is fundamental for understanding the carbon cycle impacts of wildfires and prescribed burns, as well as their contribution to atmospheric carbon dioxide concentrations in Earth system models. CO2byFire_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Total carbon dioxide flux from fire g/{grid} Total methane flux from fire quantifies the amount of methane gas released to the atmosphere during combustion events in terrestrial ecosystems. This parameter is essential for understanding greenhouse gas emissions from wildfires and prescribed burns, as methane is a potent greenhouse gas that contributes to global warming and climate change impacts in Earth system models. CH4byFire_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Total methane flux from fire g/{grid} Total O2 flux from fire refers to the total amount of oxygen that is released or absorbed during a fire. This measure includes the oxygen used for combustion as well as the oxygen produced during the burning process. It is a critical component in understanding the impact of fire on the atmosphere and the role it plays in the earth's carbon cycle. O2byFire_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Total flux from fire g/{grid} Total ammonia flux from fire represents the amount of ammonia gas emitted to the atmosphere during combustion processes in vegetation and organic matter. Fire-induced ammonia emissions contribute significantly to nitrogen cycling in ecosystems and can affect air quality, soil chemistry, and atmospheric nitrogen deposition patterns in regional and global biogeochemical models. NH3byFire_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Total ammonia flux from fire g/{grid} Total N2O flux from fire refers to the total amount of nitrous oxide (N2O) that is released into the atmosphere as a result of burning processes. Fires, including forest and grassland fires, can produce N2O as a byproduct of combustion. This parameter is significant in Earth system modeling as N2O is a potent greenhouse gas that can contribute to global warming and climate change. N2ObyFire_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Total nitrous oxide flux from fire g/{grid} Total PO4 flux from fire refers to the quantity of phosphate, an essential plant nutrient, that is expelled into the environment as a result of combustion processes. Fire events cause the release of nutrients, including phosphate, which are usually bound in plant biomass and soil organic matter. These nutrients can then be transported through smoke, ash, or post-fire run-off. Understanding the flux of these nutrients helps in assessing the impacts of fires on nutrient cycling and ecosystem productivity. PO4byFire_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) PlantMgmtDataType.txt Total phosphate flux from fire g/{grid} The current number of active plant function types in a grid. NP_col Definition source - Manual (JHC, Sep 25 2025) PlantMgmtDataType.txt Number of plant species 1 The initial number of active plant function types in a grid. NP0_col Definition source - Manual (JHC, Sep 25 2025) PlantMgmtDataType.txt Initial number of plant species 1 Number identifying the landscape grazing section to which a plant functional type in a grid cell belongs. When the plant functional type is grazed or browsed, its shoot carbon is averaged over every grid cell where it carries the same section number, so the population is grazed alike across the section. LSG_pft Match plant functional type from different scenarios Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) Earlier definition (Manual, JHC, Sep 25 2025), replaced in issue #160 after the EcoSIM source showed LSG_pft to be a landscape grazing section number: The active state of a given plant function group for grazing. PlantMgmtDataType.txt Landscape grazing section number of a plant functional type NA The total number of root axes of each plant function group. NumRootAxes_pft Definition source - Manual (JHC, Sep 25 2025) RootDataType.txt Root primary axis number 1 The soil layer number for the root tip of a given root axis. NIXBotRootLayer_rpft Definition source - Manual (JHC, Sep 25 2025) RootDataType.txt Maximum soil layer number for root axes 1 Whether a plant's roots are dead or alive. iPlantRootState_pft Definition source - Manual (JHC, Sep 25 2025) RootDataType.txt Flag to detect root system death NA An indicator of in which soil layer the deepest root exist. NIXBotRootLayer_pft Definition source - Manual (JHC, Sep 25 2025) RootDataType.txt Maximum soil layer number for all root axes 1 The mass of different chemical elements that are contained in different component of plant primary and secondary roots, as well as root associated mycorrhizae at the beginning of evolving the model a new time step. This is the initial root biomass for biomass conservation tracking in EcoSIM. RootElmsbeg_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root biomass per plant functional type g/{grid} Root growth yield refers to the productivity of biomass accumulation in the roots of plants, expressed as the amount of new root biomass produced per unit of resource input, such as water, nutrients, or carbon dioxide. It represents the efficiency of plants in utilizing resources for root growth and plays a crucial role in the overall productivity and nutrient cycling within terrestrial ecosystems. Root growth yield is a key parameter in Earth system models as it influences the carbon and nutrient dynamics in soils, water uptake, and the overall functioning of ecosystems. RootBiomGrosYld_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Measurement of root growth yield g.g-1 Threshold root nonstructural C content for initiating new root axis is a plant physiological parameter that indicates the minimum concentration of nonstructural carbon (C) in a plant's root that is required for the initiation of a new root axis. It plays a critical role in plant root development and further plant growth. MinNonstC2InitRoot_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Threshold root nonstructural carbon content for initiating new root axis g.g-1 Fraction of remobilizable nonstructural biomass in root represents the proportion of root biomass that can be mobilized and translocated to other plant parts during times of resource limitation or stress. This parameter is crucial for understanding plant carbon allocation strategies and nutrient recycling within plants, particularly during periods of resource scarcity or when plants need to support growth in other tissues. RootFracRemobilizableBiom Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Fraction of remobilizable nonstructural biomass in root 1 Root volume:mass ratio (DMVL) is a measure of the volume and mass of plant roots. It provides insights into the root system architecture, root density, and the overall growth and health of plants. This ratio can vary widely among different plant species and can be influenced by various environmental factors such as soil type, nutrient availability, and water content. RootVolPerMassC_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root volume:mass ratio m3.g-1 Root diameter primary axes measures the thickness of the main structural roots that develop directly from the plant stem or root crown. This morphological parameter influences water and nutrient transport capacity, mechanical support, and overall root system architecture in terrestrial vegetation models and ecosystem carbon allocation studies. Root1stMaxRadius1_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root diameter primary axes m Root diameter refers to the thickness of the root and root diameter secondary axes refers to the thickness of the secondary (or lateral) roots. Different species of plants have different types of roots systems and different root thicknesses. This thickness can play a significant role in the plant's ability to take up water and nutrients from the soil. Root2ndMaxRadius1_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root diameter secondary axes m The cross-sectional area of the primary root axes refers to the area of a section cut through the primary root axis perpendicular to its length. This is an important parameter in understanding the root architecture, water and nutrient uptake, as well as overall plant growth. Root1stXSecArea_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root cross-sectional area primary axes m2 Root cross-sectional area secondary axes quantifies the area of lateral or branch roots when cut perpendicular to their longitudinal axis. This parameter determines the conductive capacity of secondary root systems for water and nutrient transport, influencing plant hydraulic conductivity and resource acquisition efficiency in ecosystem models. Root2ndXSecArea_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root cross-sectional area secondary axes m2 Root layer temperature growth function describes the mathematical relationship between soil temperature and root growth rates at different soil depths. This function modulates root development and biomass allocation based on thermal conditions, making it essential for predicting plant responses to climate change and seasonal temperature variations in terrestrial ecosystem models. fTgrowRootP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer temperature growth function Cel Root nitrogen to carbon ratio represents the mass ratio of nitrogen to carbon content in root tissues, indicating the nutritional quality and metabolic activity of root systems. This stoichiometric parameter influences decomposition rates, nutrient cycling, and soil organic matter formation when roots die and decompose, making it fundamental for biogeochemical modeling in terrestrial ecosystems. RootrNC_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root nitrogen to carbon ratio g.g-1 Root phosphorus to carbon ratio quantifies the mass ratio of phosphorus to carbon in root tissue, reflecting the phosphorus content and metabolic demands of root systems. This stoichiometric relationship affects decomposition dynamics, phosphorus cycling, and nutrient availability when root litter enters soil organic matter pools in biogeochemical models. RootrPC_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root phosphorus to carbon ratio g.g-1 Root porosity refers to the percentage of the total root volume that is not occupied by plant cells or materials. This includes air spaces and intercellular spaces within the root structure. Root porosity is an important factor in determining a plant's ability to uptake water and nutrients from the soil, and can be influenced by factors such as root architecture, soil conditions, and water availability.|Root porosity refers to the proportion of the root volume that is not occupied by solid materials. This is a measurement of the open space within the root system that can be filled with air or water. Root porosity can have an impact on plant health as it influences the root’s ability to draw up water and nutrients. It can also facilitate the exchange of gases between the root system and the soil environment. RootPorosity_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root porosity m3.m-3 Root radial resistivity refers to the resistance offered by the root system of a plant to the radial flow of water and nutrients. It is an important factor affecting the uptake of water and nutrients from soil. RootRadialResist_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root radial resistivity MPa.h.m-2 Root axial resistivity (RSRA) is a measure of the ability of a plant's root system to resist the flow of electric current along its length. It is an important parameter in the study of plant physiology and root system architecture, as it can provide insights into the structure and function of the root system. The RSRA value can be influenced by various factors, including the species and age of the plant, soil conditions, and environmental factors. RootAxialResist_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root axial resistivity MPa.h.m-4 Shoot-root rate constant for nonstructural C exchange refers to the rate at which carbon is exchanged between the shoot and root of a plant, specifically in relation to nonstructural carbon compounds. This value can impact a range of plant processes, including growth, resource allocation, and response to environmental stress. ShutRutNonstElmntConducts_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Shoot-root rate constant for nonstructural carbon exchange h-1 The maximum rate at which roots can take up ammonium (NH4) from the soil. This rate can depend on various factors, such as the concentration of NH4 in the soil, the root characteristics, temperature, and soil moisture. VmaxNH4Root_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Maximum root ammonium uptake rate g.m-2.h-1 Km for root NH4 uptake refers to the half-saturation constant for the uptake of ammonium (NH4) by plant roots. It is a parameter used in modeling to describe the nutrient uptake kinetics of plants. A lower Km value indicates a higher affinity of the plant for NH4, meaning that the plant can uptake NH4 efficiently even at low soil NH4 concentrations. Conversely, a higher Km value indicates a lower affinity of the plant for NH4, meaning that the plant needs higher soil NH4 concentrations to uptake NH4 efficiently. The Km for root NH4 uptake is an important factor that influences nutrient cycling, plant nutrition, and productivity. KmNH4Root_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Km for root ammonium uptake g.m-3 Minimum ammonium concentration for root ammonium uptake defines the threshold soil ammonium concentration below which plants cannot effectively absorb ammonium nitrogen from the soil solution. This parameter determines the lower limit of plant nitrogen acquisition and influences competitive dynamics between plants and soil microorganisms for available nitrogen resources in terrestrial ecosystem models. CMinNH4Root_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Minimum ammonium concentration for root ammonium uptake g.m-3 Maximum root nitrate uptake rate represents the highest rate at which plant roots can absorb nitrate nitrogen from soil under optimal conditions. This kinetic parameter defines the upper limit of plant nitrate acquisition capacity and is essential for modeling nitrogen competition between vegetation and soil microorganisms in terrestrial ecosystem nitrogen cycling studies. VmaxNO3Root_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Maximum root nitrate uptake rate g.m-2.h-1 Michaelis constant for root nitrate uptake represents the substrate concentration at which nitrate uptake rate reaches half of its maximum value. This biochemical parameter characterizes the affinity of root transport systems for nitrate, with lower values indicating higher uptake efficiency at low soil nitrate concentrations in plant-soil nitrogen dynamics models. KmNO3Root_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Km for root nitrate uptake g.m-3 The minimum concentration of nitrate (NO3) required in root zone for root ammonium (NH4) uptake. CminNO3Root_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Minimum nitrate concentration for root ammonium uptake g.m-3 Maximum root phosphate uptake rate defines the highest rate at which plant roots can absorb phosphate from soil solution under saturated conditions. This parameter establishes the upper limit of plant phosphorus acquisition and is critical for understanding phosphorus limitation effects on plant growth and ecosystem productivity in biogeochemical models. VmaxPO4Root_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Maximum root phosphate uptake rate g.m-2.h-1 Km for root PO4 uptake refers to the half-maximal velocity constant (Km) of phosphate (PO4) uptake by plant roots. It is a parameter that characterizes the efficiency and capacity of root systems to absorb phosphate from the soil. A lower Km value indicates higher efficiency of phosphate uptake, while a higher Km value indicates lower efficiency. This parameter is important in understanding nutrient dynamics, plant growth and productivity, and strategies for optimizing nutrient use efficiency. KmPO4Root_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Km for root phosphate uptake g.m-3 Minimum PO4 concentration for root NH4 uptake refers to the minimum concentration of phosphate (PO4) in the soil solution that allows roots of plants to absorb or take up ammonium (NH4). Ammonium is a form of nitrogen that is absorbed by plant roots from the soil and used as a nutrient. The absorption of ammonium by plant roots is often dependent on the concentration of other nutrients in the soil solution, including phosphate. By defining the minimum PO4 concentration for root NH4 uptake, it becomes possible to better understand and model nutrient dynamics and plant nutrition in soil ecosystems. CMinPO4Root_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Minimum phosphate concentration for root ammonium uptake g.m-3 The inner radius of a plant's root. It is an important factor in plant growth and development, affecting the plant's ability to absorb water and nutrients from the soil. RootRaidus_rpft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root internal radius m The amount of each chemical element held in nonstructural form in the roots and mycorrhizae of a plant functional type in the grid cell, as mobile nutrients and metabolites that are not incorporated into structural components like cellulose or lignin. These elements include soluble sugars, amino acids, and mineral nutrients that can be readily mobilized for growth, maintenance, or transport to other plant organs in vegetation dynamics models. RootMycoNonstElms_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Non-structural chemical element in roots g/{grid} Maximum radius of primary roots defines the largest possible radius that main structural roots can achieve during plant development. This morphological constraint affects root hydraulic conductivity, mechanical stability, and resource investment strategies, influencing overall plant architecture and competitive ability in terrestrial ecosystem models. Root1stMaxRadius_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Maximum radius of primary roots m Maximum radius of secondary roots establishes the upper limit for the thickness of lateral or branch roots that develop from primary root axes. This parameter influences the balance between resource acquisition surface area and structural investment, affecting root system efficiency and plant competitive strategies for soil resource capture. Root2ndMaxRadius_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Maximum radius of secondary roots m Root branching frequency refers to the number of root branches per unit length of root. This is an important attribute of root system architecture and can significantly influence root function, including nutrient and water uptake. RootBranchFreq_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root branching frequency m-1 Root nodule chemical element quantifies the elemental composition of specialized root structures that house nitrogen-fixing bacteria in leguminous plants. These nodules contain essential elements like iron, molybdenum, and phosphorus that support nitrogen fixation processes, making them critical components for understanding biological nitrogen cycling in terrestrial ecosystems. RootNodulElms_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root nodule chemical element g/{grid} Root tortuosity to calculate root gaseous diffusivity measures the complexity of pathways for gas movement through root tissue pore spaces. This parameter affects oxygen transport to root tissues and carbon dioxide efflux from root respiration, influencing root metabolism and survival under waterlogged or compacted soil conditions in ecosystem models. RootPoreTortu4Gas_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root tortuosity to calculate root gaseous diffusivity 1 Root layer non-structural element refers to aspects of a plant's root layer that do not contribute to its structural integrity. These may include biomolecules, enzymes, or other compounds that play vital roles in the plant's basic physiological processes. In earth system modeling, these non-structural elements help in understanding the health and function of plant roots and can impact parameters like nutrient uptake, soil interaction, and overall plant vitality. RootNodulNonstElms_rpvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer nonstructural element g/{grid} Root layer length per plant quantifies the total length of roots present in a specific soil layer divided by the number of individual plants. This parameter describes root density distribution with depth and influences plant access to soil resources, competition dynamics, and soil-plant interactions in spatially explicit vegetation models. RootLenPerPlant_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer length per plant m/{plant} Root layer length of primary axes refers to the length of the primary roots in the layer of soil. It provides information on the depth distribution of roots within the soil profile. Root1stLen_rpvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer length primary axes m/{grid} Secondary root length refers to the length of the secondary, or lateral, roots in a plant's root system. Secondary roots develop from the primary root and enhance the root system's ability to anchor the plant and absorb water and nutrients from the soil. This measure can vary greatly depending on plant species, age, and environmental conditions.|Secondary root length refers to the total length of all secondary roots in the root system of a plant. Secondary roots, also known as lateral roots, branch off from the primary root or taproot in root layer. Secondary roots improve the efficiency of water and nutrient absorption from the soil and contribute to the stability of the plant. Measuring secondary root length is important in studies of plant growth, development, and adaptation to various environmental conditions. Root2ndLen_rpvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer length secondary axes m/{grid} The quantity of root length per unit volume of soil, commonly expressed as root length per cubic meter. This measurement is crucial for understanding root space occupation and the efficiency of soil exploration for nutrient and water uptake. RootLenDensPerPlant_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root length density in soil layers m.m-3 Root layer number primary axes refers to the count of primary root axes in a specific layer of root system. The primary root axis is the main root from which smaller lateral roots grow. Different root layers can have different densities and organization of primary root axes, affecting nutrient uptake and anchorage of the plant. This count aids in understanding root architecture and its effects on plant growth. Root1stXNumL_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer number primary axes /{grid} Number of secondary root axes in a soil layer per grid cell, summed over all primary axes of a plant functional type. Differs from Root layer number secondary axes, which is resolved by primary axis. Root2ndXNum_pvr Definition source - Claude Opus 5.5 through Claude Code (Oct 14 2026) RootDataType.txt Root layer number axes /{grid} Root layer number secondary axes refer to the number of secondary roots emerging from the primary roots in the root layer of plants. This measure is critical in understanding the complexity and efficiency of the root system of plants, influencing nutrient and water uptake, plant stability, and interactions with the soil microorganisms. Root2ndXNum_rpvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer number secondary axes /{grid} The term 'root layer average length' refers to the average length of roots within a specific layer of soil. It is a parameter used in earth systems modeling to characterize the size and distribution of roots in the soil profile. This parameter influences various processes such as nutrient uptake, water absorption, and carbon allocation, and can affect the overall productivity and stability of terrestrial ecosystems. Root2ndMeanLens_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer average length m Root layer area per plant refers to the total area covered by the roots of a single plant. It is a parameter used in ecological and earth system modeling to understand root development, nutrient uptake, and the overall growth of plants. This information is also important for understanding soil-plant interactions and nutrient cycling. RootAreaPerPlant_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer area per plant m/{plant} Root layer volume water refers to the volume of water present within the root layer of soil. This measurement is crucial in understanding plant water uptake, soil water retention, and the hydrological balance within the soil profile. It is measured in volume units (e.g., cubic meters) per soil layer depth (e.g., meters) and can significantly vary based on soil characteristics, environmental conditions, and plant root systems. RootVH2O_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer volume water m2/{grid} The average diameter of primary root axes within a specific soil layer. This measurement is important for calculating root surface area, hydraulic conductance, and mechanical strength in soil-plant water relations and carbon allocation models. Root1stRadius_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer diameter primary axes m Root layer volume air refers to the amount of air space present within the root layer of soil. This space is critical for plant growth as it allows for the exchange of gases between the roots and the atmosphere, facilitates the movement of water and nutrients to the roots, and prevents the soil from becoming overly compacted. It is a vital parameter in understanding plant physiology and soil-plant interactions, and can be influenced by factors such as soil type, compaction, moisture content, and root growth. RootPoreVol_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer volume air m2/{grid} The vertical distance from the soil surface to a specific root layer. This parameter is essential for modeling water and nutrient uptake, as well as understanding how root systems access resources at different soil depths in terrestrial ecosystems. Root1stDepz_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer depth m The average diameter of secondary or lateral root axes within a specific soil layer. This measurement helps determine the surface area available for water and nutrient absorption, as well as the mechanical properties of the root system for soil stabilization. Root2ndRadius_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer diameter secondary axes m The length of primary root axes per unit mass of root biomass, indicating root efficiency in soil exploration. This parameter is crucial for understanding how plants allocate carbon to root construction and the cost-effectiveness of different root architectures in nutrient acquisition. Root1stSpecLen_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Specific root length primary axes m.g-1 The length of secondary root axes per unit mass of root biomass, representing the efficiency of lateral root development. This metric helps evaluate how plants optimize their fine root systems for maximum soil volume exploration while minimizing carbon investment costs. Root2ndSpecLen_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Specific root length secondary axes m.g-1 Root water uptake refers to the process by which plant roots extract water from the soil. It is a vital parameter in earth systems modeling as it influences the distribution and availability of water in terrestrial ecosystems. Root water uptake is influenced by various factors such as soil moisture content, plant root characteristics, and environmental conditions. It is essential for accurately simulating the water cycle and understanding the dynamics of plant-water interactions in ecosystem models. AllPlantRootH2OLoss_pvr RPlantRootH2OUptk_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root water uptake m3.h-1/{grid} The total water potential within plant roots, representing the sum of osmotic, turgor, and matric potentials. This measurement is fundamental for understanding water transport from soil to plant and predicting water stress responses in vegetation modeling. PSIRoot_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root total water potential MPa The component of root water potential due to dissolved solutes, which creates an osmotic gradient for water movement. This parameter is essential for modeling water uptake efficiency and salt tolerance in plants under varying soil salinity conditions. PSIRootOSMO_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root osmotic water potential MPa The pressure component of root water potential resulting from cell wall resistance to expansion. This parameter is critical for understanding root growth dynamics, cell expansion processes, and mechanical interactions between roots and soil particles. PSIRootTurg_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root turgor water potential MPa The amount of gaseous tracer compounds within root tissues in the grid cell. This measurement is used to track gas transport pathways and understand root-soil gas exchange processes in biogeochemical cycling studies. trcg_rootml_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root gaseous tracer content g/{grid} The amount of dissolved gaseous tracer compounds in root tissues in the grid cell. This parameter helps quantify solute transport through root systems and understand how roots facilitate the movement of dissolved gases in soil-plant systems. trcs_rootml_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root dissolved gaseous tracer content g/{grid} The parameter 'total root gas content' refers to the amount of gas stored in the root system of a plant. It represents the total volume of gases, such as oxygen and carbon dioxide, that are present in the root zone. This parameter can be influenced by disturbances, such as deforestation or land use change, which can lead to changes in the root system and subsequently impact the amount of gas stored in the roots. TRootGasLossDisturb_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Total root gas content g/{grid} The total amount of carbon stored in the root system of an individual plant. This parameter is essential for calculating carbon allocation patterns, belowground carbon pools, and understanding plant investment strategies in root versus shoot biomass. RootBiomCPerPlant_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root carbon per plant g/{plant} Plant root element refers to any chemical element found in the roots of a plant. These elements play a crucial role in plant growth and nutrition, as well as in soil fertility and the wider ecosystem. RootElms_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Plant root element g/{grid} Plant root structural element refers to the features that comprise the structure of a plant's roots, including the root hairs, root tip, and root cap. These elements are crucial for nutrient absorption, water uptake, and structural support. RootStrutElms_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Plant root structural element g/{grid} The amount of carbon contained in protein compounds within a specific root layer in the grid cell. This measurement represents the nitrogen-rich organic carbon pool that is readily available for decomposition and nutrient cycling in soil ecosystems. RootProteinC_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer protein carbon g/{grid} Root layer element primary axes refers to the main or principal axes of elements (parts or sections) within the root layer. RootMyco1stStrutElms_rpvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer element primary axes g/{grid} The secondary axes of an element in the root layer. RootMyco2ndStrutElms_rpvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer element secondary axes g/{grid} Root layer C refers to the amount of carbon present in the soil layer where plant roots predominantly reside. It is a parameter used in earth systems modeling to simulate and understand the carbon dynamics and cycling within terrestrial ecosystems. The root layer C can vary across different plant types, soil conditions, and land management practices, and plays a crucial role in influencing soil carbon stocks, nutrient availability, and overall ecosystem productivity. PopuRootMycoC_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer carbon g/{grid} Root layer nodule element refers to the mineral content in the root nodules of plants. These nodules, which are formed in a mutualistic relationship between certain plants and bacteria, play an essential role in the nitrogen cycle by housing bacteria that can convert atmospheric nitrogen into a form that can be used by plants. RootNodulStrutElms_rpvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer nodule element g/{grid} Root total nodule mass refers to the total mass of the nodules that are present in the roots of a plant. Nodules contain bacteria that convert nitrogen in the air into a form that can be used by the plant, a process known as nitrogen fixation. Thus, the total nodule mass can indicate the capacity of a plant to fix nitrogen. NodulStrutElms_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root total nodule mass g/{grid} Root layer structural C is the amount of carbon found in the structural components of the root layer of plants. The structural components of the plants are responsible for the growth and development of the plant. Understanding the amount of structural carbon in roots can provide insights into the plant's health and productivity. RootMycoActiveBiomC_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer structural carbon g/{grid} Root layer nonstructural element concentration refers to the concentration of nonstructural elements, such as carbohydrates and sugars, within the root layer of a terrestrial ecosystem. Nonstructural elements are organic compounds that are not part of the plant's structural tissues but are important for energy storage and metabolism. The concentration of these elements in the root layer can influence various processes, including nutrient uptake, plant growth, and carbon cycling within the ecosystem. This parameter is relevant for earth system modeling as it provides insights into the carbon dynamics and functioning of terrestrial ecosystems. RootNonstructElmConc_rpvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer nonstructural element concentration g.g-1 This variable tracks the chemical elements in the primary structure of roots or mycorrhizae in each axis. It indicates the biomass size of primary roots or the primary structure of mycorrhizae. RootMyco1stElm_raxs Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root carbon primary axes g/{grid} Root layer protein C concentration refers to the concentration of organic carbon in the root layer of the soil. It represents the amount of carbon contained in proteins found in the roots of plants within a given area of soil. This parameter is important in earth systems modeling as it influences nutrient uptake, soil carbon dynamics, and soil microbial activity. RootProteinConc_rpvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root layer protein carbon concentration g.g-1 This variable tracks the root and mycorrhizae (when exists) biomass of chemical elements in different soil layers. It indicates the root distribution along the soil profile. RootMassElm_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root chemical element mass in soil layer g/{grid} This variable indicates how permeable the roots at a given soil layer are to the gas exchange with respect to the soil. It is a function of gas species, root porosity and root biomass. It plays an important role in root-soil gas exchange, for O2, N2, H2, Ar, CO2, CH4 and NH3. RootGasConductance_pvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) RootDataType.txt Root conductance for gas uptake m3.h-1/{grid} It is the mass density of surface litter, which is a function of plant chemical composition. This variable plays an important role in the water and heat exchange with respect to atmosphere and soil, and is also important for the carbon and nutrient cycling. BulkDensLitR Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Surface litter bulk density Mg.m-3 Surface litter boundary layer conductance refers to the rate of energy or mass transfer from the litter layer on the surface of the soil to the atmosphere. This is largely dependent on factors such as litter type, structure, and moisture content, along with atmospheric conditions such as wind speed, temperature, and humidity. PARR_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Surface litter boundary layer conductance m/{step} It is an indicator used by EcoSIM to indicate the type of surface litter. iLitrType_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Surface litter type:1 = plant, 2 = manure NA A dimensionless parameter that quantifies the rate at which surface litter is incorporated into soil through mixing processes. This factor accounts for bioturbation, tillage operations, and natural soil mixing that affect organic matter distribution and decomposition rates in terrestrial ecosystems. XTillCorp_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Factor for surface litter incorporation and soil mixing 1 Water transfer between soil surface and surface litter this variable represents the movement of water between the soil surface and the surface litter, or organic material, that covers the soil. This exchange of water can occur through various processes, including direct contact, capillary action, and gravitational movement. The amount and rate of water transfer can vary depending on factors such as soil properties, litter characteristics, and environmental conditions. Understanding this water exchange is important for modeling and simulating soil hydrology, soil moisture dynamics, and overall ecosystem functioning. WatFLoLitr2SoilM_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Water transfer between soil surface and surface litter g/{grid}/{step} The volumetric rate of water input to the surface litter layer from snowmelt in the grid cell. This flux is important for understanding seasonal hydrology, litter decomposition rates, and nutrient leaching processes in snow-dominated ecosystems. WatFlowSno2LitRM_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Meltwater flux into surface litter m3.h-1/{grid} FracSurfByLitR refers to the proportion of the soil surface that is covered by surface litter. Surface litter refers to the layer of fallen leaves, twigs, bark, and other organic material that covers the soil surface. It plays a crucial role in the nutrient cycling processes in ecosystems, providing a source of nutrients and organic matter to the soil below and offering protection against soil erosion. FracSurfByLitR_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Fraction of soil surface covered by surface litter 1 The net rate of thermal energy transfer to the surface litter layer in the grid cell. This parameter is crucial for modeling litter temperature dynamics, decomposition rates, and the thermal buffering effects of organic surface layers in terrestrial ecosystems. HeatFLoByWat2LitR_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Net heat transfer to surface litter MJ/{grid}/{step} The total volume of surface litter in the grid cell, including both solid organic matter and pore spaces. This measurement is essential for calculating litter bulk density, porosity, and the physical capacity for water retention and gas exchange. VLitR_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Surface litter volume m3/{grid} Threshold surface litter heat capacity refers to the minimum amount of heat energy required to change the temperature of a given amount of surface litter by a certain degree. It is an important parameter in the modelling of fire dynamics and the effects of wildfires on ecosystems, as it helps to determine the susceptiblity of surface litter to ignition and combustion. VHeatCapLitRMin_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Threshold surface litter heat capacity MJ.K-1/{grid} The maximum volume of water that can be retained by the surface litter layer in the grid cell. This parameter determines the litter's ability to store precipitation, reduce surface runoff, and provide water for decomposition processes and plant uptake. VWatLitRHoldCapcity_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Surface litter water holding capacity m3/{grid} Net water transfer to surface litter refers to the total amount of water that is transferred to the surface litter layer of an ecosystem from other parts of the ecosystem, over a given period of time. The surface litter layer, which is made up of decomposing organic matter such as dead leaves, grasses, and other plant materials, plays a crucial role in the hydrological cycle of the ecosystem. This process is an essential aspect of water cycle in ecosystems, influencing soil moisture levels, nutrient cycling, and the overall health and functioning of the ecosystem. WatFLo2LitR_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Net water transfer to surface litter MJ/{grid}/{step} The volumetric rate of water release from ice thawing within the surface litter layer in the grid cell. This flux is critical for understanding spring hydrology, freeze-thaw cycles, and their effects on litter decomposition and nutrient release. TLitrIceFlxThaw_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Water from ice thaw in surface litter m3.h-1/{grid} The rate of thermal energy release in the grid cell when water freezes within the surface litter layer. This heat flux affects local temperature dynamics and influences the thermal regime of the litter-soil interface during freezing periods. TLitrIceHeatFlxFrez_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Latent heat released from water freeze in surface litter MJ.h-1/{grid} Precipitation flux into surface litter refers to the flow rate of precipitation, such as rain, snowfall, or dew, into the surface litter layer of an ecosystem. Surface litter, which consists of dead plant material such as leaves and twigs, plays a critical role in nutrient cycling and soil formation. Measurement of this precipitation flux is important for understanding the hydrological dynamics of an ecosystem, particularly the processes of infiltration and percolation. Rain2LitRSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated SurfLitterDataType.txt Precipitation flux into surface litter m3.h-1/{grid} Irrigation flux into surface litter quantifies the amount of water added to the surface litter layer of the soil through irrigation. Surface litter refers to the organic material, such as dead leaves, twigs, and other plant residues, that covers the soil surface. This process can affect the moisture content and decomposition rates of the surface litter, affecting nutrient cycling and soil fertility. Irrig2LitRSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Group Curated SurfLitterDataType.txt Irrigation flux into surface litter m3.h-1/{grid} The fraction of surface litter volume occupied by pore spaces, expressed as pore volume per total litter volume. This parameter controls water infiltration, gas exchange, and microbial access to organic substrates in decomposing litter layers. POROS0_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Litter porosity m3{pore}.m-3{litter} The mass of organic matter in the grid cell associated with different biochemical complexes in surface litter. This parameter tracks the distribution of carbon among various decomposition pools with different turnover rates and chemical compositions. RC0_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Surface litter organic matter in each complex g/{grid} Mass of carbon in the living biomass of the autotrophic microbes in the surface litter layer, totalled over the grid cell. EcoSIM keeps these microbes, the ammonia and nitrite oxidisers, the aerobic and anaerobic methane oxidisers and the hydrogenotrophic methanogens, as one autotrophic complex, apart from the heterotrophic microbes it tracks for each litter complex. RC0ff_col Surface litter organic matter in the autotrophic complex Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) SurfLitterDataType.txt The related synonym Surface litter organic matter in the autotrophic complex is this term's former label, taken from EcoSIM's declaration of RC0ff_col. It is kept for search, but it is inaccurate. sumSurfOMCK fills RC0ff_col with live autotrophic biomass carbon only; microbial residue, dissolved, sorbed and solid organic matter are counted with the heterotrophic complexes. Surface litter autotrophic microbial biomass carbon g{C}/{grid} The volume of water present in the litter layer, totalled over the grid cell, at the beginning of a simulation period. This parameter establishes initial hydrological conditions for modeling water dynamics, decomposition processes, and heat transfer in the litter layer. LitWatMassBeg_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Total initial water mass in litter layer m3{H2O}/{grid} The volume of water remaining in the litter layer, totalled over the grid cell, at the end of a simulation period. This parameter allows calculation of net water flux through the litter layer and assessment of water balance changes over time. LitWatMassEnd_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Total final water mass in litter layer m3{H2O}/{grid} The total volumetric rate of precipitation input to the litter layer in the grid cell, including both direct rainfall and throughfall. This flux drives litter hydration, leaching processes, and provides water for microbial decomposition activities. Rain2LitR_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfLitterDataType.txt Total precipitation reaches the litter layer m3{H2O}.h-1/{grid} The average radius of microbial cells used in biogeochemical models to calculate surface area and volume. This parameter affects microbial contact with substrates, uptake kinetics, and spatial distribution of biogeochemical reactions in soil and sediment environments. ORAD Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Vague Microbial radius m The number of microbial cells per unit volume of soil or sediment. This parameter determines the spatial distribution of biogeochemical processes and influences the rates of nutrient cycling, organic matter decomposition, and greenhouse gas production in terrestrial ecosystems. microbial density BIOS Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Vague Microbial cell density in soil {cells}.m-3 The total surface area of microbial cells per unit volume of soil or sediment. This parameter controls the contact area available for substrate uptake, enzyme activity, and biogeochemical reactions, directly influencing the efficiency of microbial processes. BIOA Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Vague Microbial surface area m2.m-3 The concentration threshold at which microbial biomass begins to inhibit its own decomposition activity. This parameter represents density-dependent effects on microbial metabolism and helps model feedback mechanisms that regulate decomposition rates in soil ecosystems. DCKI Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Inhibition of decomposition by microbial concentration g{C}.m-3 The maximum fraction of nitrogen that can be remobilized from microbial biomass during nutrient stress or death. This parameter controls nitrogen cycling efficiency and determines how much microbial nitrogen becomes available for plant uptake or other biogeochemical processes. RCCX Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Maximum remobilization of microbial nitrogen g.h-1/{grid} The maximum fraction of phosphorus that can be recycled within microbial communities through remobilization processes. This parameter governs phosphorus cycling efficiency and determines the availability of this limiting nutrient for ecosystem productivity. RCCQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Maximum phosphorus recycling fractions 1 The maximum fraction of phosphorus that can be remobilized from microbial biomass during nutrient limitation or cell death. This parameter controls phosphorus availability for plant uptake and affects the overall phosphorus cycling dynamics in terrestrial ecosystems. RCCY Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Maximum remobilization of microbial phosphorus g.h-1/{grid} The proportion of nonstructural carbon that is transferred to accelerate the decomposition of more recalcitrant organic matter. This parameter quantifies the priming effect, where labile carbon inputs stimulate the breakdown of stable soil organic matter. FPRIM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Fraction of nonstructural transferred with priming 1 The proportion of microbial carbon, nitrogen, and phosphorus that participates in priming reactions. This parameter controls how microbial nutrients are allocated to enhance the decomposition of recalcitrant organic matter in soil and sediment systems. FPRIMM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Fraction of microbial carbon, nitrogen, and phosphorus transferred with priming 1 The kinetic parameter that governs the conversion of nonstructural carbon reserves into structural microbial biomass. This rate constant controls microbial growth efficiency and the allocation of carbon between energy metabolism and biomass production. OMGR Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Rate constant for transferring nonstructural to structural microbial C h-1 A kinetic parameter that quantifies how dissolved organic carbon products inhibit their own decomposition reactions by reducing enzyme activity or substrate accessibility. This constant is essential for modeling decomposition dynamics in aquatic and soil systems where organic carbon accumulation can create feedback effects that slow further breakdown processes and affect carbon cycling rates. OQKI Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) NitroPars.txt Dissolved organic carbon product inhibition constant for decomposition g{C}.m-3 The hydrogen concentration threshold above which methane production becomes inhibited due to product accumulation. This parameter controls the feedback mechanism that regulates methanogenesis rates when hydrogen gas accumulates in anaerobic environments. H2KI Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Hydrogen gas product inhibition for methanogenesis g{H}.m-3 A kinetic parameter that describes how acetate accumulation inhibits its own decomposition or production pathways in anaerobic biogeochemical processes. This constant is important for modeling fermentation and methanogenesis in waterlogged soils, sediments, and anaerobic environments where acetate serves as both an intermediate product and substrate for methane production. OAKI Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) NitroPars.txt Acetate product inhibition constant for decomposition g{C}.m-3 The Michaelis constant that describes the substrate concentration at which microbial decomposition proceeds at half-maximum rate when microbial carbon biomass is limiting. This parameter is crucial for modeling how microbial population size affects decomposition efficiency and controls the breakdown of organic matter in carbon-limited soil and sediment environments. COMKI Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) NitroPars.txt Km to slow microbial decomposition with low microbial carbon g{C_microbial}.g-1{C_substrate} The Michaelis constant that governs the substrate concentration required for half-maximum microbial maintenance respiration when microbial carbon biomass is limited. This parameter controls how substrate availability affects microbial survival and basic metabolic functions in resource-poor environments, influencing carbon turnover and microbial community persistence in oligotrophic soils and sediments. COMKM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) NitroPars.txt Km to slow microbial maintenance respiration with low microbial carbon g{C_microbial}.g-1{C_substrate} A parameter that regulates the rate at which carbon is remobilized from microbial biomass back into available carbon pools. This control mechanism affects carbon cycling efficiency and determines how quickly microbial carbon becomes available for other ecosystem processes. CKC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Controls carbon remobilization of microbial carbon g{C}.g-1{C} The kinetic rate constant for the physical mixing of surface litter with underlying soil layers. This parameter controls bioturbation processes and determines how quickly surface organic matter becomes incorporated into the soil profile. FOSCZ0 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Rate for mixing surface litter h-1 The kinetic rate constant for the mixing of subsurface litter within soil layers below the surface. This parameter controls the redistribution of buried organic matter and affects decomposition rates in deeper soil horizons. FOSCZL Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Rate for mixing subsurface litter h-1 The lowest acceptable ratio of substrate demand that must be maintained for microbial population viability. This parameter sets the threshold below which microbial populations cannot sustain themselves, affecting community structure and biogeochemical process rates. FMN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Minimum ratio of total biological demand for any substrate by any microbial population 1 The Michaelis constant for soil organic carbon decomposition, representing the substrate concentration at which decomposition occurs at half-maximum rate. This parameter controls the efficiency of microbial soil organic carbon utilization and affects carbon cycling rates in terrestrial ecosystems. DCKM0 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Km for soil organic carbon decomposition g{C}.g-1{soil} The maximum rate of substrate oxidation per unit bacterial biomass under optimal conditions. This parameter determines the metabolic activity and growth potential of bacterial communities in soil and sediment environments. VMXO Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Is bacteria a "measured in"? NitroPars.txt Specific oxidation rates for all bacteria g{C}.g-1{C}.h-1 The maximum rate of substrate oxidation per unit fungal biomass under optimal environmental conditions. This parameter characterizes the metabolic efficiency of fungal decomposer communities and their contribution to organic matter breakdown in terrestrial ecosystems. VMXF Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Specific oxidation rates for all fungi g{C}.g-1{C}.h-1 The maximum rate of acetate oxidation per unit methanogenic biomass during methane production from acetate. This parameter determines the efficiency of acetotrophic methanogenesis in anaerobic environments such as waterlogged soils and sediments. VMXM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Specific oxidation rates for acetotrophic methanogens g{C}.g-1{C}.h-1 The maximum rate of ammonia oxidation per unit nitrifying biomass during the first step of nitrification. This parameter controls the efficiency of ammonia-oxidizing bacteria and archaea in converting ammonia to nitrite in soil and aquatic systems. VMXH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Specific oxidation rates for ammonia oxidizers g.g-1{C}.h-1 The maximum rate of nitrite oxidation per unit nitrifying biomass during the second step of nitrification. This parameter determines the efficiency of nitrite-oxidizing bacteria in converting nitrite to nitrate and completing the nitrification process. VMXN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Specific oxidation rates for nitrite oxidizers g.g-1{C}.h-1 The maximum rate of methane oxidation per unit methanotrophic biomass under optimal conditions. This parameter controls the efficiency of methane-consuming bacteria in reducing atmospheric methane concentrations and affects greenhouse gas dynamics in terrestrial ecosystems. VMX4 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Specific oxidation rates for methanotrophs g.g-1{C}.h-1 The maximum rate of hydrogen oxidation per unit methanogenic biomass during methane production from hydrogen and carbon dioxide. This parameter determines the efficiency of hydrogenotrophic methanogenesis in anaerobic environments where hydrogen gas is available as an electron donor. VMXC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Specific oxidation rates for hydrogenotrophic methanogens g.g-1{C}.h-1 The Michaelis constant for dissolved organic carbon uptake by heterotrophic bacteria and fungi, representing the substrate concentration at which uptake occurs at half-maximum rate. This parameter controls the competitive ability of heterotrophic microorganisms for dissolved organic carbon in soil and aquatic environments. OQKM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Km for dissolved organic carbon uptake by heterotrophs bacteria and fungi g{C}.m-3 The Michaelis constant for acetate uptake by fermenting bacteria that convert organic acids to simpler compounds. This parameter determines the efficiency of acetate utilization by fermentative microorganisms in anaerobic soil and sediment environments. OQKA Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Need acetate uptake equation? See notes way above. NitroPars.txt Km for acetate uptake by heterotrophic fermenters g{C}.m-3 The Michaelis constant for acetate uptake by acetotrophic methanogenic archaea during methane production. This parameter controls the substrate affinity of acetate-consuming methanogens and affects methane production rates in anaerobic environments. OQKAM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Km for acetate uptake by acetotrophic methanogens g{C}.m-3 The Michaelis constant for carbon dioxide uptake by autotrophic microorganisms during carbon fixation processes. This parameter determines the efficiency of carbon dioxide assimilation by chemolithotrophic and photosynthetic organisms in terrestrial and aquatic ecosystems. CCKM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Km for carbon dioxide uptake g{C}.m-3 The Michaelis constant for methane uptake by methanotrophic bacteria that oxidize methane as an energy and carbon source. This parameter controls the substrate affinity of methane-consuming bacteria and affects atmospheric methane consumption in terrestrial ecosystems. CCK4 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Km for methane uptake g{C}.m-3 The Michaelis constant for ammonium uptake by nitrifying bacteria during the first step of nitrification. This parameter determines the substrate affinity of ammonia-oxidizing microorganisms and controls nitrification rates under varying ammonium availability. ZHKM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Km for ammonium uptake by nitrifiers g{N}.m-3 The Michaelis constant for nitrite uptake by nitrite-oxidizing bacteria during the second step of nitrification. This parameter controls the substrate affinity of nitrite-oxidizing microorganisms and affects the rate of nitrate production in soil ecosystems. ZNKM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Km for nitrite uptake by nitrifiers g{N}.m-3 The Michaelis constant for nitrate uptake by denitrifying bacteria during anaerobic respiration. This parameter determines the substrate affinity of denitrifiers for nitrate and controls the initiation of the denitrification process in oxygen-limited soil environments. Z3KM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Km for nitrate uptake by denitrifiers g{N}.m-3 The Michaelis constant for nitrite uptake by denitrifying bacteria during the intermediate steps of denitrification. This parameter controls the efficiency of nitrite reduction and affects the production of nitrous oxide and nitrogen gas in anaerobic soils. Z2KM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Km for nitrite uptake by denitrifiers g{N}.m-3 The Michaelis constant for nitrous oxide uptake by denitrifying bacteria during the final step of denitrification. This parameter determines the efficiency of nitrous oxide reduction to nitrogen gas and affects greenhouse gas emissions from agricultural and natural soils. Z1KM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Km for nitrous oxide uptake by denitrifiers g{N}.m-3 The maximum possible rate of ammonium uptake per unit ground area by all microbial functional groups combined. This parameter represents the upper limit of ammonium assimilation capacity by soil microbial communities and affects nitrogen availability for plant uptake. Z4MX Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Maximum uptake rate for ammonium uptake kinetics by all microbial functional groups g{N}.m-2.h-1 The Michaelis constant for ammonium uptake by all microbial functional groups combined, representing the substrate concentration at which uptake occurs at half-maximum rate. This parameter controls the overall efficiency of microbial ammonium assimilation in soil ecosystems. Z4KU Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Km for ammonium uptake kinetics by all microbial functional groups g{N}.m-3 The threshold ammonium concentration below which uptake by microbial functional groups becomes negligible. This parameter sets the lower limit for effective microbial ammonium assimilation and affects nitrogen cycling dynamics at low substrate concentrations. Z4MN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Minimum concentration for ammonium uptake kinetics by all microbial functional groups g{N}.m-3 The maximum possible rate of nitrate uptake per unit ground area by all microbial functional groups combined. This parameter represents the upper limit of nitrate assimilation capacity by soil microbial communities and influences nitrogen retention in ecosystems. ZOMX Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Maximum uptake rate for nitrate uptake kinetics by all microbial functional groups g{N}.m-2.h-1 The Michaelis constant for nitrate uptake by all microbial functional groups combined, representing the substrate concentration at which uptake occurs at half-maximum rate. This parameter controls the overall efficiency of microbial nitrate assimilation across all functional groups. ZOKU Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Km for nitrate uptake kinetics by all microbial functional groups g{N}.m-3 The threshold nitrate concentration below which uptake by microbial functional groups becomes negligible. This parameter establishes the lower limit for effective microbial nitrate assimilation and affects nitrogen cycling at low substrate availability. ZOMN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Minimum concentration for nitrate uptake kinetics by all microbial functional groups g{N}.m-3 The maximum possible rate of dihydrogen phosphate uptake per unit ground area by all microbial functional groups combined. This parameter represents the upper limit of phosphorus assimilation capacity by soil microbial communities and affects phosphorus availability for ecosystem productivity. HPMX Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Maximum rate for dihydrogen phosphate uptake kinetics by all microbial functional groups g{P}.m-2.h-1 The Michaelis constant for dihydrogen phosphate uptake by all microbial functional groups combined, representing the substrate concentration at which uptake occurs at half-maximum rate. This parameter controls the overall efficiency of microbial phosphorus assimilation in soil ecosystems. HPKU Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Km for dihydrogen phosphate uptake kinetics by all microbial functional groups g{P}.m-3 The threshold dihydrogen phosphate concentration below which uptake by microbial functional groups becomes negligible. This parameter sets the lower limit for effective microbial phosphorus assimilation and affects phosphorus cycling dynamics at low substrate concentrations. HPMN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Minimum concentration for dihydrogen phosphate uptake kinetics by all microbial functional groups g{P}.m-3 The Michaelis constant for atmospheric nitrogen uptake by nitrogen-fixing bacteria and archaea during biological nitrogen fixation. This parameter determines the substrate affinity of diazotrophic microorganisms and controls nitrogen fixation rates under varying atmospheric nitrogen availability. ZFKM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Km for nitrogen gas uptake by diazotrophs g{N}.m-3 The Michaelis constant for hydrogen gas uptake by hydrogenotrophic methanogenic archaea during methane production. This parameter determines the substrate affinity of hydrogen-consuming methanogens and controls methanogenesis rates in environments where hydrogen gas is the primary electron donor. H2KM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Km for hydrogen gas uptake by hydrogenotrophic methanogens g{H}.m-3 The fraction of carbon dioxide that ammonia-oxidizing bacteria can convert into biomass during chemolithotrophic growth. This efficiency parameter determines how effectively these nitrifying microorganisms build biomass while oxidizing ammonia for energy in nitrogen cycling processes. ECNH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Efficiency carbon dioxide conversion to biomass by ammonia oxidizers 1 The fraction of carbon dioxide that nitrite-oxidizing bacteria can convert into biomass during chemolithotrophic metabolism. This parameter controls biomass production efficiency for the second step of nitrification, where nitrite is oxidized to nitrate. ECNO Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Efficiency carbon dioxide conversion to biomass by nitrite oxidizers 1 The fraction of carbon dioxide that methanotrophic bacteria can convert into biomass while oxidizing methane as an energy source. This efficiency determines the biomass yield of methane-consuming bacteria and affects methane consumption rates in terrestrial and aquatic ecosystems. ECHO Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Efficiency carbon dioxide conversion to biomass by methane oxidizers 1 The stoichiometric ratio of nitrogen gas to electron transfers when denitrifying bacteria reduce nitrate during anaerobic respiration. This parameter controls the electron transport efficiency and energy yield from nitrate reduction in oxygen-limited soil environments. eQNO3toOxy Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt N2:ratios for electron transfers to NO3 by denitrifiers 1 The stoichiometric ratio of nitrogen compounds to electron transfers during nitrite reduction by denitrifying bacteria. This parameter governs the efficiency of electron transport in the denitrification pathway and affects nitrogen oxide production rates. eQNO2toOxy Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt N2:ratios for electron transfers to NO2 by denitrifiers 1 The stoichiometric ratio of nitrogen gas to electron transfers during nitrous oxide reduction by denitrifying bacteria. This parameter determines the electron transport efficiency in the final step of denitrification and affects nitrous oxide emissions from soils. eQN2OtoOxy Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt N2:ratios for electron transfers to nitrous oxide by denitrifiers 1 A dimensionless parameter that quantifies the degree to which nitrification rates are reduced by inhibitory compounds or conditions. This parameter helps model the effects of nitrification inhibitors used in agriculture and natural inhibitory processes in soil ecosystems. RNFNI Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Parameter for nitrification inhibition 1 The ammonia concentration threshold above which nitrification becomes inhibited due to substrate toxicity effects. This parameter captures the feedback mechanism where high ammonia concentrations can inhibit the very process that consumes ammonia in nitrogen cycling. ZHKI Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Inhibition of nitrification inhibition by NH3 g{N}.m-3 The concentration threshold of nitrogen oxide products above which denitrification rates become inhibited. This parameter models feedback inhibition where accumulation of denitrification products can slow down the reduction process in anaerobic environments. VMKI Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Product inhibition for nitrogen oxide reduction by denitrifiers g{N}.m-3 The concentration threshold of ammonia oxidation products above which nitrification rates become reduced due to product inhibition. This parameter controls feedback mechanisms that regulate nitrification when products accumulate in soil microsites. VHKI Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Product inhibition for ammonia oxidation by nitrifiers g{N}.m-3 The Michaelis constant for oxygen uptake by nitrifying bacteria, representing the oxygen concentration at which uptake occurs at half-maximum rate. This parameter determines the oxygen sensitivity of nitrification and affects nitrogen cycling rates under varying oxygen availability. OXKA Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Km for uptake by nitrifiers g{O}.m-3 The amount of energy required per unit carbon for aerobic bacterial growth and maintenance under optimal conditions. This parameter determines the efficiency of carbon conversion to biomass and affects the growth yield of aerobic decomposer communities in terrestrial ecosystems. EOMC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Energy requirements for microbial growth of aerobic bacteria kJ.g-1{C} The energy cost per unit carbon for denitrifying bacterial growth during anaerobic respiration using nitrate or nitrite. This parameter reflects the lower energy efficiency of anaerobic metabolism compared to aerobic respiration and affects denitrifier population dynamics. EOMD Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Energy requirements for microbial growth of denitrifiers kJ.g-1{C} The energy cost per unit carbon for fungal growth and maintenance in soil environments. This parameter accounts for the metabolic efficiency of fungi, which often differs from bacteria due to different cellular structures and metabolic pathways. EOMG Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Energy requirements for microbial growth of fungi kJ.g-1{C} The energy cost per unit carbon for fermenting microorganisms that break down organic matter without oxygen or alternative electron acceptors. This parameter reflects the low energy yield of fermentation processes and affects the efficiency of anaerobic decomposition. EOMF Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Energy requirements for microbial growth of fermenters kJ.g-1{C} The energy cost per unit carbon for methanogenic archaea that produce methane as an end product of anaerobic metabolism. This parameter represents the energy efficiency of methanogenesis, which is typically lower than other respiratory processes. EOMH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Energy requirements for microbial growth of methanogens kJ.g-1{C} The energy cost per unit carbon for nitrogen-fixing bacteria that convert atmospheric nitrogen to ammonia. This parameter includes the high energy cost of breaking the strong nitrogen-nitrogen triple bond and affects the competitiveness of diazotrophs in ecosystems. EOMN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Energy requirements for microbial growth of diazotrophs kJ.g-1{C} The Gibbs free energy change per unit carbon when dissolved organic carbon is oxidized to carbon dioxide using oxygen. This parameter determines the thermodynamic favorability and energy yield of aerobic respiration processes in soil and aquatic environments. GO2X Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Free energy yields of redox reactions for DOC-carbon dioxide kJ.g-1{C} The Gibbs free energy change per unit carbon when carbon dioxide is reduced to methane during methanogenesis. This parameter determines the thermodynamic driving force for methane production in anaerobic environments such as waterlogged soils and sediments. GH4X Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Free energy yields of redox reactions for carbon dioxide-CH4 kJ.g-1{C} The Gibbs free energy change per unit carbon when dissolved organic carbon is fermented to produce acetate. This parameter governs the thermodynamic feasibility of fermentation processes that convert complex organic matter to simpler organic acids. GCHX Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Free energy yields of redox reactions for DOC-acetate kJ.g-1{C} The Gibbs free energy change per unit carbon when acetate is oxidized to carbon dioxide using oxygen as electron acceptor. This parameter determines the energy yield from acetate respiration and affects the competitive advantage of acetate-consuming microorganisms. GO2A Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Free energy yields of redox reactions for acetate-carbon dioxide kJ.g-1{C} The Gibbs free energy change per unit carbon when acetate is converted to methane and carbon dioxide by acetotrophic methanogens. This parameter controls the thermodynamic favorability of acetotrophic methanogenesis in anaerobic sediments and waterlogged soils. GC4X Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Free energy yields of redox reactions for acetate-CH4 kJ.g-1{C} The Gibbs free energy change per unit nitrogen for the sequential reduction steps in denitrification. This parameter governs the thermodynamic driving force for nitrate reduction to nitrogen gas and determines the energy available for denitrifying bacteria. GNOX Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Free energy yields of redox reactions for NO3-NO2, NO2-N2O,N2O-N2 kJ.g-1{N} The Gibbs free energy change per unit nitrogen when atmospheric nitrogen is reduced to ammonia during biological nitrogen fixation. This parameter represents the large energy cost of breaking the nitrogen triple bond and affects the energy budget of diazotrophic organisms. GN2X Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Free energy yields of redox reactions for N2-NH3 kJ.g-1{N} The fraction of substrate carbon that is converted to biomass versus respired during aerobic nitrogen fixation. This efficiency parameter accounts for the high energy cost of nitrogen fixation and determines the carbon use efficiency of aerobic diazotrophs. EN2X Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Growth respiration efficiency for aerobic nitrogen fixation 1 The fraction of substrate carbon converted to biomass versus respired during anaerobic nitrogen fixation. This parameter reflects the even higher energy costs of nitrogen fixation under anaerobic conditions and affects the growth yield of anaerobic diazotrophs. EN2Y Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Growth respiration efficiency for anaerobic nitrogen fixation 1 The fraction of dissolved organic carbon that aerobic bacteria convert to biomass versus respire for energy. This efficiency parameter determines the carbon use efficiency of aerobic decomposer communities and affects carbon cycling rates in terrestrial ecosystems. EO2X Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Growth respiration efficiency for aerobic bacteria converting dissolved organic carbon 1 The fraction of substrate carbon that fermenting microorganisms convert to biomass versus metabolic byproducts. This low efficiency parameter reflects the minimal energy yield from fermentation processes and affects microbial growth in anaerobic environments. EH4X Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Growth respiration efficiency for fermenters 1 The fraction of substrate carbon that fungi convert to biomass versus respire during aerobic metabolism. This efficiency parameter accounts for fungal-specific metabolic characteristics and affects the role of fungi in carbon cycling and organic matter decomposition. EO2G Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Growth respiration efficiency for fungi 1 The fraction of substrate carbon that denitrifying bacteria convert to biomass during aerobic growth conditions. This parameter reflects the metabolic flexibility of denitrifiers that can switch between aerobic and anaerobic respiration depending on oxygen availability. EO2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Growth respiration efficiency for denitrifiers (aerobic) 1 The fraction of substrate carbon that nitrogen-fixing bacteria convert to biomass versus respire during diazotrophic growth. This parameter accounts for the additional energy demands of nitrogen fixation and affects the competitiveness of diazotrophs in nitrogen-limited environments. ENFX Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Growth respiration efficiency for diazotrophs 1 The fraction of substrate carbon that denitrifying bacteria convert to biomass during anaerobic respiration using nitrate or nitrite. This lower efficiency parameter reflects the reduced energy yield from anaerobic respiration compared to aerobic metabolism. ENOX Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Growth respiration efficiency for denitrifiers (anaerobic) 1 The fraction of acetate carbon that aerobic bacteria convert to biomass versus respire during acetate oxidation. This parameter determines the carbon use efficiency when bacteria utilize acetate as a substrate and affects organic acid cycling in soils. EO2A Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Growth respiration efficiency for aerobic bacteria (acetate) 1 The rate constant that describes how quickly organic carbon compounds adsorb to mineral surfaces or soil particles in terrestrial and aquatic environments. This parameter controls the partitioning of dissolved organic carbon between solution and solid phases, affecting carbon bioavailability, transport processes, and long-term carbon stabilization in soil and sediment systems. TSORP Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) NitroPars.txt Sorption rate constant for OHC h-1 A dimensionless coefficient that modifies the sorption rate of organic compounds to soil particles based on environmental conditions. This parameter affects the availability of dissolved organic carbon for microbial uptake and influences the mobility of organic matter in soil profiles. HSORP Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Sorption rate coefficient for OHC h-1 The rate constant that describes the decomposition of soil organic carbon that is bound to mineral surfaces or within soil aggregates, normalized by microbial biomass. This parameter is fundamental for modeling the breakdown of stabilized organic matter and controls long-term soil carbon storage and turnover in terrestrial ecosystems where surface-protected carbon represents a major stable pool. SPOHC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) NitroPars.txt Specific decomposition rate constant for adsorbed soil organic carbon g{C_substrate}.g-1{C_microbial} The rate constant describing the breakdown of acetate molecules that are adsorbed to soil particles or sediment surfaces, normalized by microbial biomass involved in the process. This parameter is important for understanding anaerobic decomposition processes and methane production in waterlogged soils where acetate serves as a key intermediate in organic matter mineralization pathways. SPOHA Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) NitroPars.txt Specific decomposition rate constant for adsorbed acetate g{C_substrate}.g-1{C_microbial} The rate of carbon respiration per unit microbial nitrogen required for cellular maintenance processes. This parameter represents the baseline metabolic cost for maintaining cell viability and affects the carbon use efficiency of microbial communities. RMOM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) NitroPars.txt Specific maintenance respiration g{C}.g-1{N}.h-1 The rate constant that governs the decomposition of dead microbial biomass and cellular debris, normalized by nitrogen content and expressed per unit time. This parameter controls the recycling of microbial necromass and affects nutrient release patterns, soil organic matter formation, and the efficiency of nutrient cycling in terrestrial and aquatic ecosystems. SPORC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) NitroPars.txt Specific decomposition rate constant microbial residue g{C}.g-1{N}.h-1 The rate constant describing the turnover and decomposition of living microbial biomass under different environmental conditions, normalized by nitrogen content. This parameter is essential for modeling microbial population dynamics, carbon and nitrogen cycling, and the balance between microbial growth and mortality in soil and aquatic biogeochemical processes. SPOMC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) NitroPars.txt Specific decomposition rate constant microbial biomass g{C}.g-1{N}.h-1 A coefficient that describes the fraction of nitrogen lost as ammonia and phosphorus lost as phosphate during biomass burning or combustion processes in fires. This parameter is crucial for modeling nutrient losses during wildfire events and prescribed burns, affecting post-fire soil fertility and ecosystem recovery patterns in fire-prone landscapes. EFIRE Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) NitroPars.txt Partition coefficient for N loss as NH3 and P loss as phosphate during combustion g.g-1{C} The speed at which erosion is occurring. TSED_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Erosion rate Mg/{grid}/{step} The removal of soil particles from the land surface by rainfall, runoff and erosion. SoilDetachability4Erosion1 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Soil detachment g.m-2 The susceptibility of soil particles to become detached from the soil matrix by erosive forces such as rainfall or surface water flow. This parameter quantifies soil vulnerability to erosion processes and affects sediment transport rates in terrestrial and aquatic ecosystems. SoilDetachability4Erosion2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Soil detachability g.J-1 Soil detachment/deposition refers to the process of soil particles being eroded (detached) by water or wind and subsequently being transported and deposited in another location. This process plays a significant role in shaping the Earth's surface and impacting the distribution of soil across different regions. Soil detachment may occur through various mechanisms, including raindrop impact, surface runoff, or wind erosion, while deposition can occur in bodies of water, such as rivers or lakes, or on land surfaces, such as floodplains or dunes. Modeling soil detachment/deposition helps in understanding erosion patterns, soil loss rates, and predicting the impacts of land management practices or climate change on soil erosion. CER_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Soil detachment/deposition h-1 A dimensionless parameter that describes the relationship between soil detachment and deposition rates as a function of flow conditions. This shape parameter affects the mathematical representation of erosion processes and sediment transport dynamics in watershed models. XER_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Soil detachment/deposition shape parameter 1 The mass per unit volume of solid particles in the uppermost soil or sediment layer. This parameter affects settling velocities, transport behavior, and the physical properties of surface materials important for erosion and sedimentation processes. PrtcleDensitySurfLay_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Particle density of surface layer g.cm-3 The rate at which particles settle through the water column or sink into sediment layers per hour. This parameter controls vertical transport of particulate matter and affects the distribution of organic matter and nutrients in aquatic and soil systems. VLS_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Hourly sinking rate h-1 The mass flux rate of sediment movement in the grid cell due to water or wind transport. This parameter quantifies the horizontal movement of soil and sediment particles and is fundamental for understanding landscape evolution and material redistribution. SED_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Sediment transport Mg.h-1/{grid} Total sand erosion refers to the aggregate amount of sand or sandy soil that has been displaced from its original location, due to forces such as wind or water. This concept is critical in understanding geologic formations, soil fertility, and ecosystem health. XSand_Eros_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Total sand erosion Mg.h-1/{grid} Total silt erosion refers to the total amount of silt that is eroded, typically as a result of water flow over a defined area or landscape. Silt, a sedimentary material composed of fine granules, is easily transported by water currents. Erosion of silt can impact soil fertility, water quality, and landscape stability. Total silt erosion is an important parameter in earth system modeling, particularly in understanding the effects of land use and climate change on soil loss and degradation. XSilt_Eros_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Total silt erosion Mg.h-1/{grid} Total clay erosion refers to the cumulative loss of clay particles from soil surface due to various factors such as water flow (surface runoff and soil erosion), wind (wind erosion), and human activities (tillage, deforestation, etc.). These actions can displace the clay particles and transport them away from the area, resulting in lost nutrients and degradation of soil structure. The measurement of total clay erosion is important in studying soil conservation, water quality, and ecosystem services. XClay_Eros_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Total clay erosion Mg.h-1/{grid} The total rate of ammonium-based fertilizer loss from non-banded application areas due to soil erosion processes caused by surface water flow. This measurement quantifies agricultural nutrient losses that contribute to water quality degradation and represents economic losses of applied fertilizers in farming systems with inadequate erosion control measures. XNH4Soil_Eros_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SedimentDataType.txt Total ammonium fertilizer erosion non-band g.h-1/{grid} The total mass flux rate of ammonia fertilizer lost through erosion from non-banded application areas. This parameter quantifies nitrogen loss from agricultural systems and affects both soil fertility and water quality in downstream environments. XNH3Soil_Eros_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Total ammonia fertilizer erosion non-band g.h-1/{grid} The total rate of urea fertilizer loss from non-banded application areas through soil erosion processes driven by surface runoff and sediment transport. This parameter is important for quantifying agricultural pollution sources, assessing fertilizer use efficiency, and understanding the environmental impacts of nitrogen fertilizer management in cropland systems. XUreaSoil_Eros_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SedimentDataType.txt Total urea fertilizer erosion non-band g.h-1/{grid} Total NO3 fertilizer erosion non-band refers to the total amount of nitrate (NO3) from non-banded fertilizer applications that is lost due to erosion. Non-banded fertilizer applications are those in which the fertilizer is distributed across the soil surface, rather than being applied in a band or strip. Erosion, usually caused by rainfall and runoff, can carry away these surface-applied nutrients, potentially leading to decreased fertilizer efficiency, reduced plant growth and yield, and environmental pollution due to nutrient runoff. XNO3Soil_Eros_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Total nitrate fertilizer erosion non-band g.h-1/{grid} Total NH4 fertilizer erosion band refers to the loss of ammonium (NH4) nutrient from the soil due to erosion. This generally occurs when the NH4 fertilizer has been applied in a banding method (a specific method of applying fertilizer in soil), and erosion happens due to factors such as heavy rain, wind, or other environmental conditions. The amount of erosion can affect the availability of NH4 for plants and can have a significant impact on crop productivity and environmental quality. XNH4Band_Eros_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Total ammonium fertilizer erosion band g.h-1/{grid} The total mass flux rate of ammonia fertilizer lost through erosion from banded application areas. This parameter helps assess the effectiveness of banded fertilizer application methods in reducing nutrient losses compared to broadcast applications. XNH3Band_Eros_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Total ammonia fertilizer erosion band g.h-1/{grid} Total urea fertilizer erosion band refers to the total amount of urea fertilizer that has been eroded from a specific area or 'band' as a result of various processes such as rainfall, wind, or human activity. This can be an important parameter in agricultural and environmental studies as it can provide information about the effectiveness of fertilizer application practices and the potential for nutrient losses and environmental contamination. XUreaBand_Eros_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Total urea fertilizer erosion band g.h-1/{grid} The total mass flux rate of nitrate fertilizer lost through erosion from banded application areas. This parameter quantifies nitrogen losses from precision fertilizer placement methods and affects agricultural sustainability and environmental quality. XNO3Band_Eros_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Total nitrate fertilizer erosion band g.h-1/{grid} Total adsorbed sediment erosion non-band refers to the amount of sediment that is eroded and transported by water, wind, or ice without forming distinct bands or channels. This parameter accounts for the erosion of sediment particles that have been adsorbed onto the surfaces of other particles or are not part of a well-defined sediment transport pathway. It quantifies the total volume or mass of sediment eroded from a given area or system, which includes both the suspended sediments and the sediments that are in contact with the bed or substrate. trcx_Eros_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Total adsorbed sediment erosion non-band g.h-1/{grid} Total adsorbed ALOH3 erosion refers to the amount of aluminum hydroxide (ALOH3) that is detached from the Earth's surface due to erosion processes and becomes adsorbed onto other materials or particles. This parameter quantifies the overall erosion of ALOH3 and provides insight into the transport and redistribution of this compound within the Earth system. trcp_Eros_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Total adsorbed aluminum hydroxide erosion g.h-1/{grid} Cumulative sediment erosion refers to the total amount of sediment that has been eroded over a given time period. This can be caused by factors such as water flow, wind, or human activity. The measurement of cumulative sediment erosion is important for understanding the rate and scale of land degradation, as well as the impact of erosion on landscape formation and nutrient cycling. cumSed_Eros_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Sediment erosion Mg.h-1/{grid} The mass flux rate of carbon contained in microbial residues that is lost through erosion processes. This parameter represents the transport of decomposed microbial biomass and affects carbon cycling and organic matter distribution in landscapes. OMBioResdu_Eros_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Microbial residue carbon erosion g.h-1/{grid} The mass flux rate of organic carbon that is adsorbed to mineral surfaces and lost through erosion. This parameter represents the transport of stabilized organic matter and affects long-term carbon storage and redistribution in terrestrial ecosystems. SorbedOM_Eros_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Adsorbed carbon erosion g.h-1/{grid} The mass flux rate of carbon contained in humic substances that is lost through erosion processes. This parameter quantifies the transport of recalcitrant organic matter and affects soil organic carbon distribution and long-term carbon sequestration. SolidOM_Eros_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Humus carbon erosion g.h-1/{grid} The mass flux rate of carbon in humic substances that are actively colonized by microorganisms and lost through erosion. This parameter represents the transport of biologically active organic matter and affects microbial community distribution across landscapes. SolidOMAct_Eros_2D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SedimentDataType.txt Colonized humus carbon erosion g.h-1/{grid} The conversion factor between seconds and hours, equal to 3600 seconds per hour. This fundamental time conversion constant is used throughout ecosystem models to standardize temporal units and convert between different time scales in biogeochemical calculations. secsphour Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Seconds per hour s.h-1 The conversion factor between seconds and days, equal to 86400 seconds per day. This time conversion constant enables consistent temporal scaling in ecosystem models and facilitates conversion between daily and instantaneous process rates. secspday Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Seconds per day s.d-1 The total number of seconds in a standard 365-day year, equal to 31,536,000 seconds. This temporal conversion constant is used for annual scaling of biogeochemical processes and calculating yearly rates from instantaneous measurements in Earth system models. secspyear Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Seconds in a normal year s The amount of thermal energy required to raise the temperature of a unit volume of water by one degree Kelvin. This thermodynamic constant is essential for modeling heat transfer processes, soil temperature dynamics, and energy balance calculations in terrestrial and aquatic systems. cpw Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Volumetric heat capacity for water J.g-1.K-1 MJ.m-3.K-1 The amount of thermal energy required to raise the temperature of a unit volume of ice by one degree Kelvin. This thermodynamic constant is crucial for modeling freeze-thaw processes, permafrost dynamics, and seasonal temperature variations in cold regions. cpi Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Volumetric heat capacity for ice MJ.m-3.K-1 The amount of thermal energy required to raise the temperature of a unit mass of organic carbon by one degree Kelvin. This thermodynamic property affects heat storage and transfer in soils with high organic matter content and influences soil thermal dynamics. cpo Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Heat capacity for organic matter MJ.K-1.g-1{C} The amount of thermal energy required to raise the temperature of a unit volume of fresh snow by one degree Kelvin. This thermodynamic constant is essential for modeling snowpack energy balance, snowmelt processes, and the insulating properties of snow cover. cps Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Volumetric heat capacity for fresh snow MJ.m-3.K-1 The temperature threshold at which water freezes under standard atmospheric pressure, equal to 273.15 Kelvin. This fundamental physical constant determines the phase transition between liquid water and ice in ecosystem models and affects freeze-thaw processes. TFice Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Frozen temperature K The conversion constant for temperature scale transformation, equal to 273.15 Kelvin difference between Celsius and Kelvin scales. This fundamental constant ensures consistent temperature units throughout ecosystem models and thermodynamic calculations. TC2K Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Temperature for converting Celsius to Kelvin K A standard reference temperature used for normalizing atmospheric variables and calculating temperature dependencies of biogeochemical processes. This reference point enables consistent comparisons of temperature-dependent rates across different environmental conditions and model applications. Tref Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Reference temperature for atmospheric variables K The minimum volumetric heat capacity value used as a numerical threshold in snowpack energy balance calculations. This computational constant prevents numerical instability in heat transfer equations when snowpack layers have very low heat storage capacity. VLHeatCapSnoMin Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Minimum heat capacities for solving snowpack layered water and heat fluxes MJ.K-1 The minimum volumetric heat capacity value used as a computational threshold in surface litter energy balance calculations. This numerical constant ensures stable solutions in heat transfer equations when litter layers have minimal thermal mass. VLHeatCapLitRMin Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Minimum heat capacities for solving surface litter water and heat fluxes MJ.K-1 The minimum volumetric heat capacity value used as a numerical threshold in soil energy balance calculations. This computational constant prevents division by zero and ensures numerical stability when solving heat transfer equations in very dry soils. VLHeatCapSoiMin Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Minimum heat capacities for solving soil water and heat fluxes MJ.K-1 The pressure at which water vapor becomes saturated at a given temperature, representing the equilibrium between liquid and vapor phases. This thermodynamic constant is essential for calculating evapotranspiration rates, vapor pressure deficits, and atmospheric moisture dynamics. PSIPS Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Saturated water pressure MPa The amount of thermal energy released or absorbed per unit mass when water changes phase between liquid and solid states. This thermodynamic constant is crucial for modeling freeze-thaw processes, ice formation, and energy balance during phase transitions in ecosystems. LtHeatIceMelt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Latent heat of fusion release from water to ice kJ.kg-1 The amount of thermal energy required to convert a unit mass of liquid water to vapor at constant temperature and pressure. This thermodynamic constant is fundamental for calculating evapotranspiration rates, energy partitioning, and water cycle dynamics in Earth system models. EvapLHTC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Latent heat of vaporization of water kJ.kg-1 The amount of thermal energy required to convert a unit mass of ice directly to water vapor without melting. This thermodynamic constant is essential for modeling sublimation processes in snow and ice environments, particularly in cold and arid regions where direct ice-to-vapor transitions occur. SublmHTC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Sublimation of ice kJ.kg-1 The thermal conductivity value used for the deep soil region below the modeled soil profile. This constant determines heat transfer rates in the deep subsurface and affects the lower boundary conditions for soil temperature calculations in Earth system models. TCNDG Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Assumed thermal conductivity below lower soil boundary MJ.m-1.h-1.K-1 The fundamental physical constant relating energy scale to temperature scale in thermodynamic equations. This constant is essential for calculating gas behavior, chemical reaction rates, and energy transformations in biogeochemical processes within Earth system models. RGASC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Universal gas constant J.mol-1.K-1 The mass density of organic carbon compounds used to convert between carbon mass and volume in soil and litter calculations. This parameter is crucial for determining carbon storage capacity and calculating bulk properties of organic matter in terrestrial ecosystem models. orgcden Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Where is "airspeed of an unladen swallow"? (context: European) Density of organic carbon g{C}.m-3 The characteristic height scale for atmospheric pressure changes with altitude, used in barometric pressure calculations. This constant determines how atmospheric pressure decreases with elevation and affects gas exchange processes at different altitudes in Earth system models. hpresc Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Elapsing height for atmospheric pressure m A transformed porosity parameter raised to the two-thirds power, used in empirical relationships for soil hydraulic and thermal properties. This dimensionless constant helps calculate effective transport properties that depend on soil pore structure and connectivity. POROQ Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Soil porosity ^ 2/3 1 The minimum soil organic carbon content required to sustain combustion during wildfire events. This threshold parameter determines fire ignition potential and affects wildfire spread patterns in ecosystem fire models. FORGC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Minimum soil organic carbon for combustion g.Mg-1 The maximum soil water content at which combustion can still occur during fire events. This threshold parameter determines fire suppression by soil moisture and affects the probability of fire spread in terrestrial ecosystem models. VolMaxSoilMoist4Fire Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Maximum soil water content for combustion m3.m-3 The proportion of burned carbon that is emitted as methane gas rather than carbon dioxide during fire events. This parameter controls methane emissions from wildfires and affects greenhouse gas budgets in Earth system models. FrcAsCH4byFire Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Fraction of combusted carbon released as methane 1 The water potential threshold representing extremely dry soil conditions where only hygroscopic water remains bound to soil particles. This parameter defines the lower limit of plant-available water and affects drought stress calculations in vegetation models. PSIHY Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Hygroscopic water potential, very dry (but not air dry) MPa The Michaelis constant for oxygen uptake by heterotrophic microorganisms during aerobic respiration. This parameter determines the oxygen concentration at which microbial uptake occurs at half-maximum rate and affects aerobic decomposition processes in soils. OXKM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Km for heterotrophic uptake g{O}.m-3 The minimum fraction of soil pore space that must be filled with air to allow significant gas diffusion. This threshold parameter determines when soil becomes limiting for gas exchange and affects oxygen availability for root and microbial respiration. AirFillPore_Min Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Minimum air-filled porosity for gas transfer m3.m-3 The volume fraction of air contained within ice structures, accounting for trapped air bubbles and pore spaces. This parameter affects the density and thermal properties of ice and influences heat transfer calculations in frozen soil and snow models. THETPI Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Air content of ice m3.m-3 The mass per unit volume of ice under standard conditions, used for calculating the physical properties of frozen water. This fundamental constant is essential for determining ice volume changes, thermal properties, and mechanical effects during freeze-thaw cycles in Earth system models. DENSICE Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Ice density g.cm-3 t.m-3 The characteristic length scale representing the irregularity of the snow surface, used in turbulence and heat transfer calculations. This parameter affects wind flow patterns over snow and influences heat and moisture exchange between the snowpack and atmosphere. ZW Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Snowpack surface roughness m The atomic mass of the carbon-12 isotope, used for converting between molar and mass units in carbon cycle calculations. This fundamental constant is essential for stoichiometric calculations and carbon accounting in biogeochemical models. Catomw 12? Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Carbon-12 molar mass g.mol-1 The atomic mass of the nitrogen-14 isotope, used for converting between molar and mass units in nitrogen cycle calculations. This fundamental constant enables stoichiometric calculations for nitrogen transformations and nutrient cycling in terrestrial and aquatic ecosystems. Natomw Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Nitrogen-14 molar mass g.mol-1 The atomic mass of the phosphorus-31 isotope, used for converting between molar and mass units in phosphorus cycle calculations. This fundamental constant is crucial for stoichiometric calculations and phosphorus accounting in ecosystem nutrient cycling models. Patomw Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Phosphorus-31 molar mass g.mol-1 The sine of the solar elevation angle that defines the threshold between day and twilight conditions. This parameter determines the timing of dawn and dusk transitions and affects photosynthesis calculations and diurnal cycles in ecosystem models. TWILGT Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Sine of solar inclination angle at twilight 1 A conversion factor that transforms organic carbon content per unit area into total soil mass per unit area. This parameter accounts for the relationship between carbon content and bulk soil properties, enabling calculations of total soil mass from carbon measurements. MWC2Soil Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSimConst.txt Multiplier to convert organic carbon (g C/d2) to soil mass (Mg/d2) Mg{soil}.g-1{C} The maximum solar radiation intensity that can occur during any single hour period. This parameter sets the upper bound for solar energy input calculations and is used to validate and constrain radiation data in Earth system models. RMAX ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Maximum hourly radiation MJ.m-2.h-1 A coefficient used in temporal disaggregation algorithms to estimate hourly air temperature variations from daily average values. This parameter accounts for typical diurnal temperature patterns and is essential for generating sub-daily climate forcing data in ecosystem models. TAVG1 ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Parameter to calculate hourly air temperature from daily value Cel A coefficient used in temporal disaggregation algorithms to estimate hourly vapor pressure variations from daily average values. This parameter captures typical diurnal humidity patterns and is crucial for calculating evapotranspiration and water balance at sub-daily time scales. VAVG1 ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Parameter to calculate hourly vapor pressure from daily value kPa The angular position of the sun measured horizontally from north in a clockwise direction. This parameter is essential for calculating direct solar radiation on sloped surfaces and determining shading effects in complex terrain for energy balance calculations. SAZI ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Solar azimuth of solar angle deg The cosine of the solar zenith angle, representing the projection of solar radiation onto a horizontal surface. This trigonometric parameter is fundamental for calculating incident solar radiation intensity and determining daylight hours in ecosystem models. SCOS ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Cosine of solar angle 1 The sequential day number within a calendar year, ranging from 1 to 365 or 366 in leap years. This parameter is essential for calculating seasonal variations, solar geometry, and phenological timing in ecological and climate models. DOY ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Day of year 1 The monthly averaged concentration of oxygen gas in the atmosphere, typically expressed in parts per million by volume. This parameter is important for modeling aerobic respiration processes and oxygen-dependent biogeochemical reactions in terrestrial and aquatic ecosystems. atm_co2_mon ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Monthly atmospheric oxygen [ppm]{vol} The monthly averaged concentration of methane gas in the atmosphere, representing an important greenhouse gas component. This parameter is crucial for modeling methane oxidation processes and calculating radiative forcing effects in climate and atmospheric chemistry models. atm_ch4_mon ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Monthly atmospheric methane [ppm]{vol} The monthly averaged concentration of nitrous oxide gas in the atmosphere, representing a significant greenhouse gas and ozone-depleting substance. This parameter is essential for modeling nitrogen cycling processes and calculating greenhouse gas radiative effects in Earth system models. atm_n2o_mon ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Monthly atmospheric nitrous oxide [ppm]{vol} The highest air temperature recorded during a 24-hour period, typically occurring in the afternoon. This parameter is crucial for calculating growing degree days, heat stress effects on vegetation, and daily temperature ranges in ecological and agricultural models. TMPX ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Maximum daily air temperature Cel The lowest air temperature recorded during a 24-hour period, typically occurring just before sunrise. This parameter is essential for frost risk assessment, plant dormancy calculations, and determining diurnal temperature variations in ecosystem models. TMPN ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Minimum daily air temperature Cel The total amount of solar energy received per unit area during a 24-hour period, including both direct and diffuse radiation. This parameter is fundamental for photosynthesis calculations, energy balance modeling, and determining potential evapotranspiration in terrestrial ecosystems. SRAD ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) These hourly/daily measurements are basically the same but in different units. Should daily/hourly be qualifiers? Daily solar radiation MJ.m-2.d-1 The total amount of water falling as rain, snow, or other forms of precipitation during a 24-hour period. This parameter is essential for hydrological modeling, soil moisture calculations, and determining water availability for plant growth and ecosystem processes. RAIN ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Daily precipitation mm.d-1 The natural movement of air at the Earth's surface. WIND ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Daily wind travel m.d-1 The temperature at which air becomes saturated with water vapor and condensation begins, averaged over a 24-hour period. This parameter is crucial for calculating relative humidity, vapor pressure deficit, and atmospheric moisture conditions in ecosystem water balance models. DWPT ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Daily dewpoint temperature Cel The air temperature measured at hourly intervals, providing sub-daily resolution for meteorological forcing. This parameter enables detailed modeling of diurnal temperature cycles, thermal stress effects, and energy balance processes in terrestrial ecosystems. TMP_hrly ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Hourly air temperature Cel The solar radiation intensity measured at hourly intervals, providing detailed temporal resolution of energy input. This parameter is essential for modeling diurnal photosynthesis patterns, canopy energy balance, and sub-daily variations in ecosystem productivity. SWRad_hrly ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Hourly solar radiation MJ.m-2.h-1 The precipitation rate measured at hourly intervals, providing detailed temporal resolution of water input to ecosystems. This parameter enables modeling of precipitation intensity effects, storm events, and sub-daily hydrological processes in terrestrial and aquatic systems. RAINH ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Hourly precipitation mm.h-1 The wind velocity measured at hourly intervals, providing detailed temporal resolution of atmospheric motion. This parameter is crucial for calculating wind-driven evapotranspiration, boundary layer conductance, and mechanical effects on vegetation at sub-daily time scales. WINDH ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Hourly wind speed m.h-1 The dewpoint temperature measured at hourly intervals, indicating the moisture content of air throughout the day. This parameter enables detailed modeling of humidity variations, vapor pressure deficit calculations, and plant water stress assessment at sub-daily resolution. DWPTH ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Hourly dewpoint temperature Cel The thermal radiation emitted by the atmosphere and surrounding surfaces in the infrared spectrum. This parameter is essential for calculating net radiation balance, nighttime cooling rates, and thermal energy exchange between ecosystems and the atmosphere. RadLWClm ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Moved units out of label Measurement of longwave radiation MJ.m-2.h-1 The atmospheric pressure at Earth's surface measured at hourly intervals, providing detailed temporal resolution of barometric conditions. This parameter is essential for calculating vapor pressure deficit, modeling stomatal conductance, and understanding atmospheric density effects on gas exchange processes. PBOT_hrly ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Hourly surface atmospheric pressure kPa A multiplicative factor representing relative changes in solar radiation from baseline conditions. This parameter is used in climate change scenarios to modify historical radiation data for impact assessments and future ecosystem modeling under altered atmospheric conditions. DRAD ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Unsure how to model change factors Change factor for radiation 1 A multiplicative factor representing relative changes in daily maximum temperature from baseline conditions. This parameter enables climate change impact modeling by adjusting historical temperature extremes to project future thermal stress on ecosystems and agricultural systems. DTMPX ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Unsure how to model change factors Change factor for maximum temperature Cel A multiplicative factor representing relative changes in daily minimum temperature from baseline conditions. This parameter is crucial for modeling frost events, cold stress effects, and nighttime energy balance under projected climate change scenarios. DTMPN ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Unsure how to model change factors Change factor for minimum temperature Cel A multiplicative factor representing relative changes in atmospheric humidity from baseline conditions. This parameter enables assessment of changing vapor pressure deficit effects on plant transpiration and ecosystem water balance under future climate projections. DHUM ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Unsure how to model change factors Change factor for humidity 1 A multiplicative factor representing relative changes in precipitation from baseline conditions. This parameter is fundamental for climate change impact studies, enabling modification of historical precipitation patterns to assess future hydrological regimes and ecosystem water availability. DPREC ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Unsure how to model change factors Change factor for precipitation 1 A multiplicative factor representing relative changes in wind velocity from baseline conditions. This parameter is used to modify historical wind patterns for climate change projections, affecting calculations of evapotranspiration, aerodynamic conductance, and mechanical stress on vegetation. DWIND ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Unsure how to model change factors Change factor for wind speed 1 A multiplicative factor representing relative changes in ammonium nitrogen deposition through precipitation from baseline conditions. This parameter enables assessment of changing atmospheric nitrogen inputs and their effects on ecosystem productivity and soil chemistry under future environmental scenarios. DCN4R ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Unsure how to model change factors Change factor for ammonium in precipitation 1 A multiplicative factor representing relative changes in nitrate nitrogen deposition through precipitation from baseline conditions. This parameter is essential for modeling altered nitrogen cycling, eutrophication risks, and ecosystem responses to changing atmospheric nitrogen pollution levels. DCNOR ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Unsure how to model change factors Change factor for nitrate in precipitation 1 The solar radiation flux absorbed by ecosystem components including vegetation, soil, and water surfaces. This parameter represents the energy available for photosynthesis, evapotranspiration, and heating processes, making it fundamental for ecosystem energy balance and productivity modeling. Eco_RadSW_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Shortwave radiation absorbed by the ecosystem MJ.h-1 The baseline soil temperature profile from a control simulation used as reference for climate warming experiments. This parameter provides the initial thermal state against which temperature changes are compared in climate change impact studies and ecosystem warming response analyses. TKS_ref_vr ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Reference temperature profile from control run to warming experiment K The cumulative change in daily maximum temperature over time from baseline conditions. This parameter tracks long-term trends in temperature extremes and is essential for assessing heat stress impacts, growing season changes, and extreme weather effects on ecosystem processes. TDTPX ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Accumulated change for maximum temperature Cel The cumulative change in daily minimum temperature over time from baseline conditions. This parameter quantifies long-term trends in nighttime cooling and is crucial for modeling frost risk, chilling requirements, and low-temperature stress effects on vegetation and agricultural systems. TDTPN ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Accumulated change for minimum temperature Cel The cumulative change in solar radiation over time from baseline conditions. This parameter tracks long-term trends in energy input and is fundamental for assessing photosynthesis changes, energy balance shifts, and ecosystem productivity responses under altered radiation regimes. TDRAD ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Accumulated change for radiation MJ.h-1/{grid} The cumulative change in atmospheric humidity over time from baseline conditions. This parameter tracks long-term trends in moisture availability and is essential for assessing ecosystem responses to sustained changes in atmospheric water vapor content. TDHUM ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Accumulated change for humidity kPa The cumulative change in precipitation over time from baseline conditions. This parameter quantifies long-term trends in water input and is crucial for assessing ecosystem drought stress, hydrological shifts, and vegetation community changes under climate variability. TDPRC ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Accumulated change for precipitation mm.d-1 The cumulative change in wind velocity over time from baseline conditions. This parameter tracks long-term trends in atmospheric circulation patterns and their effects on ecosystem boundary layer processes, evapotranspiration rates, and mechanical stress on vegetation. TDWND ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Accumulated change for wind speed m.s-1 The cumulative change in ammonium nitrogen deposition through precipitation over time from baseline conditions. This parameter tracks long-term trends in atmospheric nitrogen inputs and their effects on ecosystem nitrogen cycling and soil chemistry. TDCN4 ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Accumulated change for ammonium in precipitation mm.d-1 The cumulative change in nitrate nitrogen deposition through precipitation over time from baseline conditions. This parameter quantifies long-term trends in atmospheric nitrogen pollution and its impacts on ecosystem eutrophication and nitrogen saturation. TDCNO ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Accumulated change for nitrate in precipitation mm.d-1 The temperature of the ambient air at a specified height above ground level. This fundamental meteorological parameter controls rates of biological processes, evapotranspiration, soil respiration, and chemical reactions in terrestrial ecosystems. TA TCA_col TairK_col surface-air_temperature ATS: surface-air_temperature [K], written into EcoSIM TairK_col, the Kelvin form of TCA_col. AmeriFlux FP-Standard base name: TA. ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Air temperature Cel K The average temperature over a complete year, calculated from daily or monthly temperature measurements and representing the thermal climate baseline for a location. This fundamental climate variable controls ecosystem processes including plant growth rates, species distributions, decomposition processes, and biogeochemical cycling patterns across terrestrial and aquatic environments. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Mean annual temperature Cel K Wind speed is a fundamental atmospheric quantity. It is the speed at which air is moving horizontally relative to the surface of the earth. Wind speed is measured in various units of speed, such as meters per second or kilometers per hour. It is an essential parameter in understanding atmospheric dynamics, weather forecasting, and in many environmental and engineering applications. WS WindSpeedAtm_col surface-wind_speed "Wind speed" is a concept now, so this should be restructured as a variable measuring that attribute. ATS: surface-wind_speed [m s-1]; the ATS-EcoSIM coupling multiplies by 3600 to give EcoSIM WindSpeedAtm_col in m h-1. ODM2 variable name concept "Wind speed": Wind speed. AmeriFlux FP-Standard base name: WS. AmeriFlux reports the maximum within an averaging period as WS_MAX; BERVO expresses it with the Maximum qualifier rather than a separate term. ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) I think wind speed is one term rather than velocity of wind Measured wind speed m.h-1 m.s-1 The volumetric concentration of water vapor in the atmosphere, expressing the moisture content per unit volume of air. This parameter is essential for calculating relative humidity, vapor pressure deficit, and evapotranspiration rates in ecosystem water balance models. VPA_col water vapor concentration ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) ODM2 variable name concept "Water vapor concentration": Water vapor concentration Atmospheric vapor concentration m3.m-3 The partial pressure exerted by water vapor molecules in the atmosphere, representing the thermodynamic activity of atmospheric moisture. This parameter is fundamental for calculating vapor pressure deficit, humidity indices, and driving forces for plant transpiration and soil evaporation. VPK_col surface-vapor_pressure_air ATS: surface-vapor_pressure_air [Pa]; the ATS-EcoSIM coupling divides by 1000 to give EcoSIM VPK_col in kPa. ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Atmospheric vapor pressure Pa kPa The pressure exerted by the weight of the atmosphere at a given location, typically measured at ground level. This parameter affects gas densities, boiling points, and is essential for calculating vapor pressure deficit and atmospheric correction factors in ecosystem modeling. PA PBOT_col barometric pressure ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) ODM2 variable name concept "Barometric pressure": Barometric pressure. AmeriFlux FP-Standard base name: PA. Atmospheric pressure kPa The duration of time that the sun is above the horizon in a single day. This number varies throughout the year and by geographical location. It has significant effects on the behavior and physiological functions of many organisms, including plants and humans. DayLensCurr_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Daylength h The longest duration of daylight that occurs in a 24-hour period, typically on the summer solstice. DayLenthMax ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Maximum daylength h A trigonometric function representing the geometric relationship between solar beam angle and leaf surface orientation. This parameter determines the projected leaf area intercepting direct solar radiation and is essential for calculating light absorption, photosynthesis rates, and canopy energy balance. OMEGAG ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Sine of solar beam on leaf surface 1 Sky longwave radiation refers to the part of the electromagnetic spectrum that is radiated from the sky in the form of thermal radiation, or heat. This is a key component of the earth's energy balance, affecting both climatic and biological processes. LWRadSky_col LW_IN surface-incoming_longwave_radiation ATS: surface-incoming_longwave_radiation [W m-2]. EcoSIM SkyLonwRad_col is the per-area form of this variable in MJ m-2 h-1. ODM2 variable name concept "Radiation, incoming longwave": Incoming Longwave Radiation. AmeriFlux FP-Standard base name: LW_IN. ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Sky longwave radiation MJ.h-1 MJ.m-2.h-1 W.m-2 Total daily solar radiation (TRAD) refers to the accumulated solar radiation received in a certain location over a day. This solar radiation includes not only the direct radiation from the sun, but also includes diffuse solar radiation that is scattered in the atmosphere. The value of daily solar radiation can be used in a variety of scientific fields, such as climatology, ecology, solar energy, and agriculture, to interpret and predict different environmental phenomena. TRAD_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total daily solar radiation MJ.d-1 The highest atmospheric water vapor pressure recorded during a 24-hour period, typically occurring during peak humidity conditions. This parameter is essential for calculating vapor pressure deficit ranges, assessing plant water stress potential, and modeling maximum evapotranspiration demand. HUDX_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Daily maximum vapor pressure kPa The lowest atmospheric water vapor pressure recorded during a 24-hour period, typically occurring during coolest or driest conditions. This parameter is crucial for determining vapor pressure deficit extremes and modeling minimum humidity stress on vegetation and ecosystem water balance. HUDN_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Daily minimum vapor pressure kPa Total daily wind travel is the total distance covered by the wind in a single day. This measure can be important in various studies, such as those related to weather patterns, climate modelling, and even the spread of airborne particles or pollutants. TWIND_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total daily wind travel m.d-1 A temperature correction factor used in Arrhenius equation calculations to adjust kinetic rate constants for biochemical processes. This parameter accounts for temperature dependencies in enzyme kinetics, microbial metabolism, and other temperature-sensitive biogeochemical reactions in ecosystem models. TempOffset_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) TempOffset_col for calculating temperature in Arrhenius curves Cel The precipitation that falls directly onto exposed ground surface without canopy interception, used specifically for soil erosion calculations. This parameter quantifies the kinetic energy of raindrops impacting bare soil and is essential for modeling splash erosion, surface runoff generation, and sediment detachment processes. PrecDirect2Grnd_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Direct precipitation at ground surface used to calculate soil erosion m.h-1 The precipitation that reaches the ground surface after canopy interception and throughfall, used specifically for soil erosion calculations. This parameter represents modified precipitation characteristics including reduced drop size and altered spatial distribution, affecting soil particle detachment and erosion patterns beneath vegetation. PrecIndirect2Grnd_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Indirect precipitation at ground surface used to calculate soil erosion m.h-1 The initial atmospheric CO2 concentration refers to the starting concentration of carbon dioxide (CO2) in the Earth's atmosphere at the beginning of a simulation or modeling experiment. It represents the baseline level of CO2 before any external factors (such as human activities) influence its concentration. The initial atmospheric CO2 concentration is an important parameter in earth systems modeling as it affects several processes, including climate change, air quality, and carbon cycle dynamics. CO2EI_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Initial atmospheric carbon dioxide concentration g{C}.m-3 umol.mol-1 The mass or molar concentration of gaseous constituents in the atmosphere, quantifying the abundance of trace gases or major atmospheric components. This parameter is fundamental for air quality assessment, atmospheric chemistry modeling, and understanding gas exchange processes between ecosystems and the atmosphere. AtmGasCgperm3_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Atmospheric gas concentration g.m-3 umol.mol-1 The molar concentration of oxygen gas in the atmosphere, representing the abundance of this essential gas for aerobic respiration and combustion processes. This parameter affects plant root respiration rates, soil microbial activity, and biogeochemical processes in waterlogged or oxygen-limited environments. OXYE_col atm_o2 ATS: atm_o2, a scalar property passed to EcoSIM by the EcoSIM PK. ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Atmospheric oxygen concentration umol.mol-1 Atmospheric N2O concentration refers to the quantity of nitrous oxide (N2O) present in each unit volume of air in the atmosphere. Also known as laughing gas, N2O is a powerful greenhouse gas that is released into the atmosphere through soil cultivation practices, especially the use of commercial and organic fertilizers, fossil fuel combustion, nitric acid production, and biomass burning. Monitoring the atmospheric N2O concentration is important for climate modeling and understanding global warming potential. Z2OE_col atm_n2o ATS: atm_n2o, a scalar property passed to EcoSIM by the EcoSIM PK. ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Atmospheric nitrous oxide concentration umol.mol-1 The molar concentration of nitrogen gas in the atmosphere, representing the abundance of this inert diatomic gas. This parameter is important for atmospheric density calculations, pressure corrections, and understanding the nitrogen reservoir available for biological nitrogen fixation processes in terrestrial ecosystems. Z2GE_col atm_n2 ATS: atm_n2, a scalar property passed to EcoSIM by the EcoSIM PK. ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Atmospheric nitrogen concentration umol.mol-1 The molar concentration of ammonia gas in the atmosphere, representing a key reactive nitrogen species. This parameter is essential for modeling atmospheric nitrogen deposition, soil acidification processes, and ecosystem nitrogen inputs that affect plant nutrition and soil chemistry. ZNH3E_col atm_nh3 ATS: atm_nh3, a scalar property passed to EcoSIM by the EcoSIM PK. ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Atmospheric ammonia concentration umol.mol-1 The abundance of methane (CH4) gas in the Earth's atmosphere. It is expressed as the volume of CH4 per unit volume of air (parts per million, ppm) or as a mixing ratio. Methane is an important greenhouse gas and contributes to climate change. Monitoring and understanding changes in atmospheric CH4 concentration is crucial for climate models and Earth system simulations. CH4E_col atm_ch4 ATS: atm_ch4, a scalar property passed to EcoSIM by the EcoSIM PK. ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Atmospheric methane concentration umol.mol-1 The amount of hydrogen gas (H2) in the Earth's atmosphere, expressed typically in parts per million by volume (ppmv). Measuring this concentration is important in understanding the Earth's climate system, as H2 is one of the major constituent gases in the Earth's atmosphere and plays a critical role in various atmospheric processes. H2GE_col atm_h2 ATS: atm_h2, a scalar property passed to EcoSIM by the EcoSIM PK. ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Atmospheric hydrogen gas concentration umol.mol-1 The amount of carbon dioxide present in the atmosphere. It is an important parameter in earth science and biochemistry. The concentration of CO2 in the atmosphere can affect global warming and climate change, as CO2 is a greenhouse gas that traps heat in the earth's atmosphere. CO2E_col atm_co2 ATS: atm_co2, a scalar property passed to EcoSIM by the EcoSIM PK. ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Atmospheric carbon dioxide concentration umol.mol-1 The molar concentration of argon gas in the atmosphere, representing the abundance of this noble gas constituent. This parameter is used for atmospheric density calculations, gas mixing ratio corrections, and as a reference gas for analyzing atmospheric composition changes in earth system models. ARGE_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Atmospheric argon gas concentration umol.mol-1 The moment when the sun appears to contact or pass over an observer's meridian, reaching its highest point in the sky on that day, and it is the midpoint of daylight hours. SolarNoonHour_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Time of solar noon h The solar radiation that travels in a straight path from the sun to Earth's surface without atmospheric scattering. This parameter represents the beam component of solar energy and is essential for calculating surface heating, photosynthesis rates, and directional light effects on ecosystem processes. RadSWDirect_col SW_DIR AmeriFlux FP-Standard base name: SW_DIR. ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Direct shortwave radiation W.m-2 The solar radiation that has been scattered by atmospheric particles and molecules before reaching Earth's surface. This parameter represents the multidirectional component of solar energy and is important for modeling light penetration into plant canopies and understory photosynthesis. RadSWDiffus_col SW_DIF AmeriFlux FP-Standard base name: SW_DIF. ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Diffuse shortwave radiation W.m-2 The direct beam component of photosynthetically active radiation that travels in a straight path from the sun to plant surfaces. This parameter quantifies the unscattered photons in the 400-700 nanometer wavelength range that are available for photosynthesis and plant growth processes. PPFD_DIR RadPARDirect_col AmeriFlux FP-Standard base name: PPFD_DIR. ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Direct photosynthetically active radiation umol.m-2.s-1 The scattered component of photosynthetically active radiation that reaches surfaces from multiple directions after atmospheric scattering. This parameter quantifies the multidirectional light energy in the 400-700 nanometer range and is important for modeling understory photosynthesis and canopy light penetration. PPFD_DIF RadPARDiffus_col AmeriFlux FP-Standard base name: PPFD_DIF. ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Diffuse photosynthetically active radiation umol.m-2.s-1 The trigonometric sine function of the sun's elevation angle above the horizon, determining solar radiation intensity. This parameter quantifies the geometric relationship between sun position and surface orientation, affecting direct radiation receipt and shadow patterns in ecosystem energy balance calculations. SineSunInclAngle_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Sine of solar angle 1 The trigonometric sine function of the sun's elevation angle projected one hour into the future. This parameter enables predictive calculations of solar radiation patterns and is essential for modeling time-dependent light conditions and energy balance forecasting in ecosystem models. SineSunInclAnglNxtHour_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Sine of solar angle next hour 1 The product of latent heat flux and aerodynamic resistance, representing the total water vapor energy transfer through the atmospheric boundary layer. This parameter quantifies the combined effect of evapotranspiration energy and atmospheric resistance on moisture transport from surfaces to the atmosphere. TLEX_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total latent heat flux x boundary layer resistance MJ.m-1 The product of sensible heat flux and aerodynamic resistance, representing the thermal energy transfer through the atmospheric boundary layer. This parameter quantifies the total thermal exchange between the surface and atmosphere, accounting for both the energy gradient and the resistance to heat transfer processes. TSHX_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total sensible heat flux x boundary layer resistance MJ.m-1 The vertical depth in soil where heat sources or sinks are located, defining the position of thermal boundaries in subsurface energy balance. This parameter is essential for modeling soil temperature profiles, ground heat flux calculations, and thermal interactions between surface processes and deeper soil layers. SoilHeatSrcDepth_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Depth of soil heat sink/source m The temperature at the specified depth where soil heat sources or sinks are located, serving as a thermal boundary condition. This parameter defines the reference temperature for calculating vertical heat transfer and is essential for modeling soil thermal dynamics and energy balance processes. TKSD_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Temperature of soil heat sink/source Cel The initial mean annual air temperature refers to the average temperature of the atmosphere over a year at the beginning of a simulation or modeling scenario for Earth systems. It represents the starting point for evaluating the impact of various environmental factors on temperature trends and patterns. This parameter is essential for understanding climate change, analyzing atmospheric processes, and studying the broader interactions of Earth's systems. It serves as a crucial input for earth systems models and simulations to simulate and predict future climate conditions. ATCAI_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Initial mean annual air temperature Cel The solar radiation energy contained within the direct beam from the sun, representing the focused component of shortwave energy. This parameter quantifies the concentrated solar energy flux that creates strong directional lighting and heating effects on exposed surfaces and vegetation. RadSWSolarBeam_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Shortwave radiation in solar beam MJ.m-2.h-1 The photosynthetically active radiation contained within the direct solar beam, representing focused photons in the 400-700 nanometer range. This parameter quantifies the concentrated light energy available for photosynthesis in the direct beam component, affecting sunlit leaf photosynthetic rates and canopy productivity. RadPARSolarBeam_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Photosynthetically active radiation in solar beam umol.m-2.s-1 The mean annual air temperature refers to the average temperature of the atmosphere over a year, calculated by summing the daily temperatures and dividing by the number of days. It is an essential parameter for Earth systems modeling and provides important information about the climate conditions of a region. The mean annual air temperature is influenced by various factors, including solar radiation, land surface characteristics, and atmospheric conditions. It is used in various Earth systems models to understand and predict the behavior of the climate system, such as temperature variations, weather patterns, and climate change. ATCA_col MAT AmeriFlux BADM variable name: MAT. ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Mean annual air temperature Cel K Mean annual soil temperature refers to the average temperature of the soil throughout the year. It is a parameter used in earth systems modeling to understand and simulate the thermal conditions of the soil. The mean annual soil temperature is an important factor that influences various soil processes and dynamics, including nutrient availability, microbial activity, and plant growth. It is typically measured at a certain depth below the surface and is influenced by factors such as climate, vegetation cover, and soil properties. ATCS_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Mean annual soil temperature Cel K The liquid water precipitation that falls from clouds when water droplets reach sufficient size to overcome air resistance. This parameter represents the primary source of freshwater input to terrestrial ecosystems and is fundamental for hydrological modeling, soil moisture dynamics, and plant water availability assessments. RainFalPrec_col surface-precipitation_rain ATS: surface-precipitation_rain [m s-1], a depth per unit area per second; the ATS-EcoSIM coupling converts it to EcoSIM RainFalPrec_col as a volume per grid cell per hour. ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) This is a measurement, not a concept Rainfall measurement m.s-1 m3.h-1/{grid} Snowfall refers to the amount of snow that falls in a specific area in a certain time period. It is usually measured in millimeters or inches of water equivalent. Snowfall is an important aspect in climate and weather studies, as it affects factors such as surface albedo, soil moisture levels, hydrology, and ecosystem dynamics. SnoFalPrec_col snow-precipitation surface-precipitation_snow ATS: surface-precipitation_snow and snow-precipitation [m SWE s-1], snow water equivalent depth per unit area per second; the ATS-EcoSIM coupling converts it to EcoSIM SnoFalPrec_col as a volume per grid cell per hour. ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) This is a measurement, not a concept Snowfall measurement m3.h-1/{grid} m{SWE}.s-1 The artificial application of water to soil or land areas to supplement natural precipitation for agricultural or ecosystem management purposes. This parameter represents anthropogenic water inputs that affect soil moisture dynamics, plant growth, and local hydrological cycles in managed ecosystems. Irrigation_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Rate of application of water through irrigation m3.h-1/{grid} The sum of rainfall and snowfall that a particular region receives over a period of time. This value is often used in meteorology to monitor and predict weather patterns and to analyze the climate patterns of a particular region. PrecAtm_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) This is a measurement, not a concept Rainfall + snowfall m3.h-1/{grid} The combined water input from natural rainfall and artificial irrigation applications to a given area. This parameter represents the total liquid water availability for plant uptake, soil moisture replenishment, and surface runoff generation in managed agricultural or ecosystem settings. PrecRainAndIrrig_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) This is a measurement, not a concept Rainfall + irrigation m3.h-1/{grid} The accumulated kinetic energy delivered by rainfall to the soil surface over time, used for erosion potential assessment. This parameter quantifies the cumulative impact force of raindrops that causes soil particle detachment, surface crusting, and initiates erosion processes in exposed soil areas. EnergyImpact4Erosion_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Cumulative rainfall energy impact on soil surface MJ/{grid} The acidity or alkalinity of a precipitation event such as rain or snowfall. This measure is important in understanding the environmental impact of atmospheric pollution, as it can indicate the presence of acid rain. Acid rain is primarily caused by emissions of sulfur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids. pH_rain_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Precipitation pH 1 The concentration of ammonium (NH4+) ions in the initial state of precipitation, specifically in relation to Earth system modeling. It represents the amount of ammonium present in the atmospheric water vapor or cloud droplets at the beginning of a simulated precipitation event. This parameter is important for understanding the transport, deposition, and cycling of nitrogen in the atmosphere, as ammonium can impact ecosystem productivity and water quality when it is deposited onto land surfaces. CN4RI_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Precipitation initial ammonium concentration mol{N}.m-3 The initial concentration of nitrate (NO3) present in falling rain or snow. Atmospheric nitrates can be deposited onto the Earth's surface during precipitation events and enter terrestrial and aquatic ecosystems. This measurement is important for understanding the biogeochemical nitrogen cycle, nutrient availability, and potential impacts on environmental and human health from elevated nitrate levels. CNORI_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Precipitation initial nitrate concentration mol{N}.m-3 The concentration of NH4 (ammonium) ions in precipitation, typically measured in units of mass per volume. It represents the amount of ammonium present in rainwater, snow, or other forms of precipitation, providing insights into the level of nitrogen deposition onto terrestrial ecosystems. This parameter is important for understanding nutrient cycling and assessing the impact of atmospheric deposition on ecosystems, particularly in relation to nitrogen availability and potential effects on vegetation growth and water quality. NH4_rain_mole_conc ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Precipitation ammonium concentration mol.m-3 The amount of nitrate (NO3) in a solution that is formed during or after a precipitation event, such as rain or snow. It represents the concentration of NO3 particles present in the water as a result of interactions between atmospheric emissions and environmental conditions. This parameter is significant in Earth system modeling as it can impact various ecological and biogeochemical processes in aquatic ecosystems, including nutrient cycling and the bioavailability of other elements. NO3_rain_mole_conc ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Precipitation nitrate concentration mol.m-3 The amount of monohydrogen phosphate (H2PO4-), a type of phosphoric acid, present in a solution resulting from a precipitation event. This can include rain, snow, or any other form of precipitation. This parameter is important to note as it can impact a range of ecological and environmental factors, including soil composition, plant growth, and water quality. H2PO4_rain_mole_conc ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Precipitation H2PO4 concentration mol.m-3 The molar concentration of volatile organic compounds or gases dissolved in precipitation water. This parameter quantifies atmospheric contaminants and trace gases that are scavenged by precipitation, affecting water quality and nutrient inputs to terrestrial and aquatic ecosystems. trcg_rain_mole_conc_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Precipitation volatile concentration mol.m-3 The concentration of the HPO4 (hydrogen phosphate) ion in rainfall or other forms of atmospheric precipitation. It is a parameter that quantifies the amount of HPO4 present in a given volume or mass of precipitation, typically measured in units of concentration (e.g., milligrams per liter or parts per million). This parameter is relevant in Earth system modeling as it influences the nutrient availability in ecosystems and can impact the cycling of phosphorus, an essential nutrient for plant growth and productivity. HPO4_rain_mole_conc_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Precipitation hydrogen phosphate concentration mol.m-3 A heat accumulation index calculated as the daily temperature above a base threshold, used to predict plant development timing. This parameter integrates thermal time and is essential for modeling crop phenology, flowering dates, pest emergence, and other temperature-dependent biological processes in agricultural and ecological systems. GDD_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Growing degree day with base temperature at oC Cel The thermal energy content of precipitation delivered to the ground surface, affecting surface temperature and energy balance. This parameter accounts for the temperature difference between precipitation and surface, influencing soil warming or cooling processes and local microclimate conditions. PrecHeat_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Precipitation heat to surface MJ.h-1/{grid} The water content released from decomposing plant litter that falls from above-ground vegetation components. This parameter represents an additional moisture source to surface soil layers and affects local water balance, decomposition rates, and nutrient cycling processes in forest and grassland ecosystems. RainLitr_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Water from aboveground falling litter m3/{grid} A computational parameter used in calculating gas sink scalar values for trace gas modeling in soil systems. This parameter influences the solubility and transport coefficients for gaseous species and is essential for modeling greenhouse gas fluxes and soil-atmosphere gas exchange processes. trcs_solcoef_col ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Remove? Parameter for computing RGasSinkScalar_vr 1 The proportion of ground surface area covered by snow, expressed as a dimensionless fraction from zero to one. This parameter affects surface albedo, energy balance, soil insulation, and hydrological processes, making it essential for modeling seasonal snowpack dynamics and ecosystem responses to snow cover. FracSurfAsSnow_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfSoilDataType.txt Fraction of snow cover 1 The proportion of ground surface area that is free from snow cover, expressed as a dimensionless fraction from zero to one. This parameter determines the exposed surface area available for direct radiation absorption, soil-atmosphere gas exchange, and precipitation infiltration during snow-covered periods. FracSurfSnoFree_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfSoilDataType.txt Fraction of snow-free cover 1 The proportion of ground surface area consisting of exposed bare soil without vegetation or litter cover. This parameter affects surface energy balance, soil erosion susceptibility, direct evaporation rates, and soil-atmosphere heat and gas exchange processes in terrestrial ecosystems. FracSurfBareSoil_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfSoilDataType.txt Fraction of exposed soil surface 1 The thermal infrared radiation emitted upward from the ground surface based on its temperature and emissivity. This parameter represents outgoing thermal energy and is essential for calculating surface energy balance, net radiation, and nighttime cooling rates in terrestrial ecosystems. LWRadBySurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfSoilDataType.txt Longwave radiation emitted from ground surface MJ/{grid}/{step} The balance between incoming and outgoing radiation at the ground surface, representing the net radiative energy available. This parameter is fundamental for surface energy balance calculations and determines the energy available for heating, evapotranspiration, and photosynthesis processes. HeatByRad2Surf_col surface-net_radiation ATS: surface-net_radiation [W m-2]. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfSoilDataType.txt Total net radiation at ground surface MJ/{grid}/{step} W.m-2 The total energy associated with water phase changes at the ground surface, including evaporation and condensation processes. This parameter represents the latent heat component of surface energy balance and is fundamental for modeling water vapor exchange between soil, vegetation, and atmosphere. HeatEvapAir2Surf_col surface-qE_latent_heat ATS: surface-qE_latent_heat [W m-2]. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Split heat flux from chemical flux SurfSoilDataType.txt Total latent heat flux at ground surface MJ/{grid}/{step} W.m-2 Total sensible heat flux at ground surface refers to the total amount of energy, in Joules (J), transferred from the ground surface to the atmosphere as a result of differences in temperature. This process is one of the main ways energy is exchanged between the surface and the atmosphere, impacting climate and weather patterns. HeatSensAir2Surf_col surface-qE_sensible_heat ATS: surface-qE_sensible_heat [W m-2]. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfSoilDataType.txt Total sensible heat flux at ground surface MJ/{grid}/{step} W.m-2 Total convective heat flux at ground surface refers to the total amount of heat transferred by convection from the air to the ground surface. This parameter is important in meteorology and climate science as it influences local air temperatures, weather patterns, and the overall energy balance of the Earth's surface. EcoSIM reports it as a total for the grid cell over a time step. HeatSensVapAir2Surf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfSoilDataType.txt Total convective heat flux at ground surface MJ/{grid}/{step} Total ground heat flux at ground surface refers to the rate at which heat energy is transferred to the ground surface. It is an important component of the Earth's surface energy balance and can have significant impacts on climate, weather patterns, and physical processes in the Earth's surface and subsurface. EcoSIM reports it as a total for the grid cell over a time step. HeatNet2Surf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfSoilDataType.txt Total ground heat flux at ground surface MJ/{grid}/{step} Negative of total evaporation at ground surface refers to the negative amount of the total water evaporated from the ground surface, including water bodies, soil surface and plant surfaces. This value indicates the rate or speed at which water changes from a liquid to a gas or vapor state. This evaporation can occur due to solar radiation, wind, temperature, air pressure, and other environmental conditions. VapXAir2GSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfSoilDataType.txt Negative of total evaporation at ground surface m3/{grid}/{step} The maximum volume of water that can be stored on the ground surface in depressions, vegetation, and surface roughness features. This parameter determines surface water ponding capacity and affects runoff generation, infiltration patterns, and local water balance in terrestrial ecosystems. VWatStoreCapSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfSoilDataType.txt Surface water storage capacity m3/{grid} The maximum volume of water that can be retained at the soil surface layer through adhesion and surface tension forces. This parameter determines surface moisture storage capacity and affects evaporation rates, seedling establishment, and surface biological activity in arid and semi-arid ecosystems. VLWatHeldCapSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfSoilDataType.txt Soil surface water retention capacity m3/{grid} The lowest thermal capacity values for surface materials under dry or minimal moisture conditions. This parameter represents the minimum energy required to change surface temperature and is essential for modeling temperature extremes, heat wave effects, and thermal stress in arid ecosystems. VHCPNX_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfSoilDataType.txt Minimum heat capacities MJ.K-1/{grid} The aerodynamic conductance for gas transfer at the soil surface, scaled up from point measurements to area-representative values. This parameter governs the efficiency of gas exchange between soil and atmosphere and affects carbon dioxide efflux, oxygen diffusion, and other soil-atmosphere gas fluxes. CondGasXSnowM_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfSoilDataType.txt Area upscaled soil surface boundary layer conductance m/{grid} Precipitation flux into soil surface refers to the rate at which water (from rainfall, snow melt, etc.) enters the soil surface in the grid cell. This parameter is crucial in hydrological studies and modeling, as it impacts soil moisture levels, groundwater recharge, runoff generation and erosion. Rain2SoilSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfSoilDataType.txt Precipitation flux into soil surface m3.h-1/{grid} Irrigation flux into soil surface refers to the rate at which water from irrigation enters the soil surface. This is an important factor in agricultural management and water resource planning as it directly influences the amount of water available to crops and its effectiveness in promoting plant growth. Measurements of this parameter can help optimize irrigation strategies and conserve water resources. Irrig2SoilSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfSoilDataType.txt Irrigation flux into soil surface m3.h-1/{grid} The volumetric flow rate of water across the lake surface boundary, representing exchange between the lake and atmosphere or adjacent systems. This parameter is essential for modeling lake water balance, evaporation rates, and hydrological connectivity in watershed-scale ecosystem models. LakeSurfFlowMicP_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Split "soil surface", "ground surface" etc into just surface with soil/ground as context? SurfSoilDataType.txt Lake surface water flux m3.h-1/{grid} The thermal energy transfer rate from the lake surface to the atmosphere, with positive values indicating outgoing heat flux. This parameter is crucial for modeling lake thermal dynamics, ice formation timing, and energy exchange between aquatic ecosystems and the atmosphere. LakeSurfHeatFlux_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SurfSoilDataType.txt Lake surface heat flux, outgoing positive m3.h-1/{grid} The partitioning of organic residue materials into different decomposition kinetic pools based on their biochemical characteristics. This parameter determines how plant litter and organic matter are distributed among fast, intermediate, and slow decomposing fractions in soil biogeochemical models. ORCI Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicBGCPars.txt Allocation of residue to kinetic components 1 The distribution of substrates or nutrients among different microbial functional groups with distinct metabolic kinetics. This parameter governs how available resources are partitioned between fast-growing and slow-growing microbial communities in soil biogeochemical cycling models. FL Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicBGCPars.txt Allocation to microbial kinetic fractions 1 The ratio limits of nitrogen to carbon content in heterotrophic microbial biomass, defining the stoichiometric constraints. This parameter establishes the range of nutrient ratios that heterotrophic microorganisms can maintain and is essential for modeling microbial nutrient demand and growth limitations in soil systems. rNCOMC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicBGCPars.txt Maximum/minimum mass based heterotrophic microbial N:C g{N}.g-1{C} The ratio limits of phosphorus to carbon content in heterotrophic microbial biomass, defining the stoichiometric constraints. This parameter establishes the range of phosphorus ratios that heterotrophic microorganisms can maintain and is crucial for modeling phosphorus cycling and microbial growth limitations in terrestrial ecosystems. rPCOMC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicBGCPars.txt Maximum/minimum mass based heterotrophic microbial P:C g{P}.g-1{C} The ratio limits of nitrogen to carbon content in autotrophic microbial biomass, defining the stoichiometric constraints. This parameter establishes the nutrient ratio ranges for autotrophic microorganisms and is important for modeling nitrogen fixation, nitrification, and other autotrophic processes in soil ecosystems. rNCOMCAutor Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicBGCPars.txt Maximum/minimum mass based autotrophic microbial N:C g{N}.g-1{C} The ratio limits of phosphorus to carbon content in autotrophic microbial biomass, defining the stoichiometric constraints. This parameter establishes the phosphorus ratio ranges for autotrophic microorganisms and is essential for modeling phosphorus cycling in autotrophic microbial communities and soil systems. rPCOMCAutor Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicBGCPars.txt Maximum/minimum mass based autotrophic microbial P:C g{P}.g-1{C} The mean of the maximum and minimum nitrogen to carbon ratios across microbial functional groups in soil. This parameter represents the average stoichiometric constraint for nitrogen in microbial communities and is used for scaling biogeochemical processes across diverse microbial populations. rNCOMC_ave Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicBGCPars.txt Group average maximum/minimum mass based microbial N:C g{N}.g-1{C} The mean of the maximum and minimum phosphorus to carbon ratios across microbial functional groups in soil. This parameter represents the average stoichiometric constraint for phosphorus in microbial communities and is essential for scaling phosphorus cycling processes across diverse soil microorganisms. rPCOMC_ave Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicBGCPars.txt Group average maximum/minimum mass based microbial P:C g{P}.g-1{C} The kinetic parameter controlling the rate at which heterotrophic microorganisms colonize and begin decomposing fresh plant litter. This parameter determines the initial lag time before decomposition begins and is essential for modeling the transition from fresh litter inputs to active microbial decomposition. DOSA Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicBGCPars.txt Rate constant for litter colonization by heterotrophs h-1 The kinetic parameter controlling the intrinsic rate of organic matter decomposition by microbial communities per unit biomass. This parameter quantifies the specific metabolic activity of decomposer organisms and is fundamental for modeling carbon turnover rates in soil biogeochemical cycles. SPOSC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicBGCPars.txt Specific decomposition rate constant h-1 The proportional distribution of available nitrogen among different kinetic pools or microbial functional groups. This parameter governs how nitrogen is partitioned between fast and slow cycling components and affects nitrogen availability for plant uptake and ecosystem productivity. CNOFC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicBGCPars.txt Fractions to allocate nitrogen to kinetic components 1 The proportional distribution of available phosphorus among different kinetic pools or microbial functional groups. This parameter controls phosphorus partitioning between fast and slow cycling components and is crucial for modeling phosphorus limitation and ecosystem nutrient cycling. CPOFC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicBGCPars.txt Fractions to allocate phosphorus to kinetic components 1 The standard nitrogen to carbon ratios used for soil organic carbon complexes when specific measurements are unavailable. This parameter provides default stoichiometric constraints for soil organic matter decomposition and is essential for initializing biogeochemical models in data-limited environments. CNRH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicBGCPars.txt Default N:C ratios in soil organic carbon complexes g{N}.g-1{C} The standard phosphorus to carbon ratios used for soil organic carbon complexes when specific measurements are unavailable. This parameter provides default stoichiometric constraints for phosphorus cycling in soil organic matter and is crucial for model initialization in phosphorus-limited ecosystems. CPRH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicBGCPars.txt Default P:C ratios in soil organic carbon complexes g{P}.g-1{C} The carbon content fraction representing heterotrophic microbial biomass within soil organic carbon pools. This parameter quantifies the proportion of soil carbon tied up in heterotrophic microorganisms and is essential for modeling microbial carbon dynamics and decomposer community structure. OMCF Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicBGCPars.txt Heterotrophic microbial biomass composition in soil organic carbon g{C}.g-1{C} The carbon content fraction representing autotrophic microbial biomass within soil organic carbon pools. This parameter quantifies the proportion of soil carbon in autotrophic microorganisms and is important for modeling primary production by soil-based autotrophs and chemosynthetic processes. OMCA Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) MicBGCPars.txt Autotrophic microbial biomass composition in soil organic carbon g{C}.g-1{C} The thermal state of soil at specified depths. This parameter controls reaction rates, microbial activity, root growth, and nutrient cycling processes, making it fundamental for modeling all temperature-dependent biological and chemical processes in terrestrial ecosystems. TKS_vr TKSoil1_vr TS ATS: temperature [K] on the subsurface domain. EcoSIM TKSoil1_vr is the intermediate time step copy of this variable that receives it in the ATS-EcoSIM coupling. AmeriFlux FP-Standard base name: TS. AmeriFlux reports it in degrees Celsius. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Soil temperature Cel K The cumulative water phase change flux in small soil pores during freeze-thaw cycles, measured hourly. This parameter quantifies ice formation and melting in micropore spaces and is essential for modeling soil structure changes, water movement, and root zone dynamics in seasonally frozen soils. TLIceThawMicP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Hourly accumulated freeze-thaw flux in micropores m2.h-1/{grid} The cumulative latent heat exchange associated with water phase changes in soil during freeze-thaw cycles, measured hourly. This parameter accounts for energy absorption and release during ice formation and melting processes, significantly affecting soil temperature dynamics in cold climate regions. TLPhaseChangeHeat2Soi_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Hourly accumulated freeze-thaw latent heat flux from soil MJ.h-1/{grid} The cumulative water phase change flux in large soil pores during freeze-thaw cycles, measured hourly. This parameter quantifies ice dynamics in macropore networks and is crucial for modeling drainage patterns, root penetration, and soil structural stability under freeze-thaw stress. TLIceThawMacP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Hourly accumulated freeze-thaw flux in macropores m2.h-1/{grid} The cumulative latent heat exchange associated with snow melting and refreezing processes, measured hourly. This parameter quantifies energy dynamics within snowpack during phase transitions and affects snow layer temperature, melt rates, and thermal insulation properties over underlying soil. XPhaseChangeHeatL_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Hourly accumulated freeze-thaw latent heat flux from snow MJ.h-1/{grid} Heat capacity of a soil layer, totalled over the grid cell, the sum of the heat capacities of its solids, liquid water, and ice. It varies with soil composition, moisture, and layer thickness, and governs soil temperature dynamics, freeze-thaw, and ground heat storage. VHeatCapacity_vr Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), from the EcoSIM source (StartsMod.F90, SoilLayerDynMod.F90, SnowPhysMod.F90) for issue #98 SoilHeatDataType.txt Soil heat capacity MJ.K-1/{grid} The total thermal energy content accumulated across all ecosystem components within a model grid cell. This parameter includes heat storage in soil layers, litter layer, and vegetation canopy, representing the integrated thermal capacity of the entire ecosystem column. HeatStore_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Heat stored over the grid, including soil, litter and canopy MJ/{grid} The thermal energy input rate that contributes to temperature increase in soil layers or ecosystem components. This parameter represents various heat sources including solar radiation absorption, metabolic heat generation, and artificial heating, affecting local temperature dynamics and ecosystem processes. HeatSource_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Heat source for warming MJ.h-1/{grid} The upper component of the fraction used to calculate thermal conductivity of soil solid particles. This parameter incorporates soil mineralogy, particle size distribution, and porosity effects on heat conduction through the solid phase of soil matrix in thermal modeling calculations. NumerSolidThermCond_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Numerator for soil solid thermal conductivity MJ.m.h-1.K-1 The lower component of the fraction used to calculate thermal conductivity of soil solid particles. This parameter accounts for soil physical properties and structure that moderate heat conduction through the solid phase, completing the thermal conductivity calculation in soil heat transfer models. DenomSolidThermCond_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Denominator for soil solid thermal conductivity MJ.K-1 The downward thermal energy transfer rate from the surface into subsurface soil layers, calculated from energy balance equations. This parameter represents the ground heat flux component of surface energy partitioning and is essential for modeling soil temperature profiles and subsurface thermal dynamics. HeatFlx2Grnd_col surface-ecosim_source surface-qE_conducted ATS: surface-qE_conducted [W m-2]. In the ATS-EcoSIM coupling, EcoSIM HeatFlx2Grnd_col divided by column area and by 3600 is returned to ATS as surface-ecosim_source [MW m-2], the surface energy source. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Heat flux into ground, computed from surface energy balance model MJ.h-1/{grid} MW.m-2 W.m-2 The thermal energy transfer rate into individual soil layers measured at hourly intervals. This parameter quantifies the vertical heat transport through soil profile and is essential for modeling diurnal temperature fluctuations, soil thermal gradients, and heat storage changes in layered soil systems. THeatFlowCellSoil_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Hourly heat flux into soil layer MJ.m-3 The thermal energy removed from the soil system through water drainage processes. This parameter accounts for heat export when warm soil water moves laterally or vertically out of the system, affecting local soil temperature and energy balance in hydrologically active soils. HeatDrain_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Heat loss through drainage MJ.h-1/{grid} The thermal energy removed from the surface through overland water flow. This parameter quantifies heat export when surface water at ambient temperature flows off the landscape, contributing to local cooling and energy redistribution across watershed scales. HeatRunSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Heat loss through surface runoff MJ.h-1/{grid} The thermal energy removed from the system through water discharge from soil or groundwater. This parameter accounts for heat export through various water outflow processes and affects regional energy balance and thermal dynamics in terrestrial-aquatic interface zones. HeatDischar_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Heat loss through discharge MJ.h-1/{grid} The total thermal energy transfer rate into the entire soil column from surface and boundary sources. This parameter represents the integrated heat input to the soil profile and is fundamental for modeling overall soil thermal dynamics and temperature changes across multiple soil layers. THeatFlow2Soil_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Heat flow into column MJ.h-1/{grid} The thermal energy input rate resulting from various heating processes within the soil system. This parameter includes heat generation from metabolic processes, decomposition, root respiration, and external heating sources that contribute to soil temperature elevation and energy balance. HeatSource_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Heat source from heating MJ.h-1/{grid} The thermal energy exchange during phase transitions between frozen and liquid water in soil. This parameter accounts for latent heat release during freezing and latent heat absorption during thawing, which significantly affects soil temperature dynamics in cold climate regions. THeatSoiThaw_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Heat associated with freeze-thaw MJ.h-1/{grid} The thermal energy transfer rate from the snowpack into the underlying soil surface. This parameter represents heat conduction through snow layer and affects soil insulation, freeze-thaw dynamics, and subsurface temperature maintenance during snow-covered periods. QSnoHeatXfer2Soil_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Heat flux from snow into soil MJ.h-1/{grid} The volumetric rate of ice formation or accumulation in soil layers, particularly important for frozen ground and aquatic systems. This parameter quantifies ice dynamics that affect soil porosity, water movement, and thermal properties in permafrost regions and seasonally frozen soils. QIceInflx_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilHeatDataType.txt Ice influx to layer, essential for pond/lake m3{H2O}.h-1/{grid} The topographic gradient measured in four cardinal directions, representing the three-dimensional terrain characteristics. This parameter controls surface water flow patterns, erosion potential, solar radiation interception, and microclimate variations across landscape positions in ecosystem models. SLOPE_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Slope in four directions deg The volumetric water content retained in soil after excess water has drained away under gravitational force. This parameter represents the upper limit of plant-available water storage and is fundamental for modeling soil water balance, irrigation scheduling, and plant water stress assessments. FieldCapacity_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Water contents at field capacity m3/{grid} The volumetric water content at which plants can no longer extract water from soil and begin to wilt permanently. This parameter represents the lower limit of plant-available water and is essential for modeling drought stress, irrigation timing, and plant survival under water-limited conditions. WiltPoint_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Water contents at wilting point m3/{grid} The maximum rate of water movement through saturated soil in the vertical direction under the influence of gravity. This parameter is fundamental for modeling groundwater recharge, drainage processes, and vertical water redistribution in soil profiles across terrestrial ecosystems. SatHydroCondVert_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Soil vertical saturated hydraulic conductivity mm.h-1 The maximum rate of water movement through saturated soil in the horizontal direction under hydraulic gradients. This parameter controls lateral water flow, subsurface drainage patterns, and hillslope hydrology processes that redistribute water across landscape positions in watershed systems. SatHydroCondHrzn_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Soil horizontal saturated hydraulic conductivity mm.h-1 The soil water potential at which excess gravitational water has drained and water is held against gravity by capillary forces. This parameter defines the upper limit of plant-available water storage and is essential for modeling soil water retention, irrigation scheduling, and drought stress assessment. PSIAtFldCapacity_col field_capacity ATS: field_capacity [MPa], an input parameter of the EcoSIM PK. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Water potentials at field capacity MPa The soil water potential at which plants can no longer extract water and begin permanent wilting. This parameter represents the lower limit of plant-available water and is crucial for modeling plant water stress, irrigation timing, and ecosystem responses to drought conditions. PSIAtWiltPoint_col wilting_point ATS: wilting_point [MPa], an input parameter of the EcoSIM PK. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Water potentials at wilting point MPa The volumetric water content present in soil at the beginning of a simulation or measurement period. This parameter provides the starting moisture conditions for hydrological modeling and affects initial rates of evapotranspiration, infiltration, and plant water uptake in terrestrial ecosystem models. THW_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Initial soil water content m3.m-3 The volumetric ice content present in soil at the beginning of a simulation, representing frozen water in soil pores. This parameter is essential for modeling permafrost dynamics, freeze-thaw processes, and seasonal changes in soil thermal and hydraulic properties in cold climate regions. THI_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Initial ice content m3.m-3 The fraction of incoming solar radiation that is reflected by the ground surface back to the atmosphere. This parameter controls surface energy balance, soil heating rates, and local microclimate conditions, significantly affecting evapotranspiration and photosynthesis processes in terrestrial ecosystems. SurfAlbedo_col surface-albedo ATS: surface-albedo [-]. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Surface albedo 1 The natural logarithm of soil porosity, representing the logarithmic transformation of pore space fraction in soil. This parameter is used in pedotransfer functions and statistical modeling to linearize relationships between porosity and other soil hydraulic properties for improved model performance. LOGPOROS_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Log soil porosity 1 The natural logarithm of volumetric water content at field capacity, used in logarithmic transformations for statistical analysis. This parameter enables linear regression modeling of soil water retention relationships and improves predictive accuracy in pedotransfer functions for soil hydraulic characterization. LOGFldCapacity_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Log water content at field capacity 1 The natural logarithm of volumetric water content at wilting point, used in logarithmic transformations for statistical modeling. This parameter facilitates linear relationships in pedotransfer functions and improves predictions of plant-available water capacity across diverse soil types and textures. LOGWiltPoint_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Log water content at wilting point 1 The natural logarithm of the ratio between soil porosity and water content at field capacity, representing pore size distribution characteristics. This parameter quantifies the proportion of large drainable pores and is essential for modeling soil drainage capacity and aeration status in agricultural systems. PSD_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Log (soil porosity / water content at field capacity) 1 A dimensionless parameter that describes the shape of the soil water retention curve during drying processes. This parameter controls the steepness and curvature of water release relationships and is essential for modeling soil water dynamics, irrigation scheduling, and plant water availability. SRP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Shape parameter for water desorption 1 The proportional slope components in perpendicular horizontal directions, representing two-dimensional topographic gradients. This parameter controls surface water flow direction, erosion patterns, and lateral redistribution of water and sediments across landscape positions in watershed modeling. FSLOPE_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Fraction of slope in 1 and 2 1 The combined volume of small pore spaces in soil at the beginning of a simulation, representing initial micropore storage capacity. This parameter affects initial water retention, gas diffusion rates, and provides baseline conditions for modeling changes in soil structure and pore connectivity over time. VLMicPt0_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Initial total soil micropore porosity m3/{grid} The natural logarithm of soil water potential when all pore spaces are filled with water. This parameter represents the logarithmic transformation of saturation conditions and is used in mathematical models to linearize water retention relationships for improved computational efficiency. LOGPSIAtSat Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Log water potential at saturation 1 The natural logarithm of soil water potential at field capacity, used in logarithmic transformations of water retention functions. This parameter enables linear modeling approaches for predicting soil water dynamics and plant-available water capacity across different soil types and environmental conditions. LOGPSIFLD_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Log water potential at field capacity 1 The natural logarithm of soil water potential at wilting point, representing the logarithmic transformation of permanent wilting conditions. This parameter is used in mathematical models to linearize water stress relationships and improve predictions of plant water limitation thresholds. LOGPSIMN_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Log water potential at wilting point 1 The difference between logarithmic water potentials at saturation and field capacity, representing the range of drainable water. This parameter quantifies the logarithmic scale difference in water retention and is used in mathematical models to characterize soil drainage capacity and pore size distribution. LOGPSIMND_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Log water potential at saturation - log water potential at field capacity 1 Heat capacity of the solid mineral and organic fraction of a soil layer, totalled over the grid cell, the thermal energy needed to raise the temperature of those solids by one kelvin. It depends on soil texture, rock and organic matter content, and layer thickness. VHeatCapacitySoilM_vr Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), from the EcoSIM source (StartsMod.F90, SoilLayerDynMod.F90, SnowPhysMod.F90) for issue #98 SoilPhysDataType.txt Soil solid heat capacity MJ.K-1/{grid} The maximum depth of seasonal thaw in permafrost soils, representing the thickness of the seasonally unfrozen layer. This parameter is critical for modeling permafrost dynamics, root zone availability, biogeochemical processes, and ecosystem functioning in cold climate regions. ActiveLayDepZ_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPhysDataType.txt Active layer depth of a permafrost soil m The mass of organic carbon per unit mass of soil, representing the soil carbon stock and fertility. This parameter affects soil structure, water retention, nutrient cycling, and is fundamental for modeling carbon sequestration, decomposition processes, and soil quality in terrestrial ecosystems. CORGCI_vr ORG_CARBON SOIL_CHEM_C_ORG Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) HWSD2: ORG_CARBON [% weight]. AmeriFlux BADM variable name: SOIL_CHEM_C_ORG. SoilPropertyDataType.txt Soil organic carbon content g.kg-1 The fraction of soil volume occupied by pore spaces filled with air or water, representing void space in the soil matrix. This parameter controls water storage capacity, gas diffusion rates, root penetration, and is fundamental for modeling soil hydraulic conductivity and aeration in terrestrial ecosystems. POROSI_vr POROS_vr porosity ATS: porosity [-] on the subsurface domain, written into EcoSIM POROS_vr in the ATS-EcoSIM coupling. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Soil porosity m3.m-3 The initial proportion of soil volume occupied by large pore spaces, representing channels for rapid water and gas movement. This parameter affects preferential flow patterns, drainage rates, and aeration status, particularly important for modeling bypass flow and chemical transport in structured soils. SoilFracAsMacPt0_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Soil macropore fraction m3.m-3 The mass of sand-sized particles per unit mass of soil, representing the coarse mineral fraction in soil texture. This parameter affects soil drainage, aeration, water infiltration rates, and is essential for determining hydraulic conductivity and soil physical behavior in hydrological models. CSAND_vr SOIL_TEX_SAND Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) HWSD2: SAND [% weight], 0.05 to 2 mm in the fine earth. AmeriFlux BADM variable name: SOIL_TEX_SAND. SoilPropertyDataType.txt Soil sand content kg.Mg-1 The mass of silt-sized particles per unit mass of soil, representing the intermediate mineral fraction in soil texture. This parameter influences water retention capacity, nutrient holding capacity, and contributes to soil structure formation and erodibility characteristics in agricultural and natural systems. CSILT_vr SOIL_TEX_SILT Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) HWSD2: SILT [% weight], 0.002 to 0.05 mm in the fine earth. AmeriFlux BADM variable name: SOIL_TEX_SILT. SoilPropertyDataType.txt Soil silt content kg.Mg-1 The mass of clay-sized particles per unit mass of soil, representing the fine mineral fraction with high surface area. This parameter controls water retention, nutrient adsorption, soil plasticity, and swelling behavior, making it crucial for modeling soil hydraulic properties and chemical reactivity. CCLAY_vr SOIL_TEX_CLAY Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) HWSD2: CLAY [% weight], less than 0.002 mm in the fine earth. AmeriFlux BADM variable name: SOIL_TEX_CLAY. SoilPropertyDataType.txt Soil clay content kg.Mg-1 The proportion of soil volume occupied by rock fragments, representing the non-soil mineral component. This parameter reduces effective soil volume for water storage and root growth, affects bulk density calculations, and influences soil thermal and hydraulic properties in stony soils. ROCK_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Rock fraction 1 The initial mass of dry soil per unit volume including pore spaces, representing soil compaction at simulation start. This parameter affects porosity calculations, root penetration resistance, water storage capacity, and provides baseline conditions for modeling soil structural changes over time. SoiBulkDensityt0_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Initial bulk density Mg.m-3 The proportion of soil volume occupied by small pore spaces that retain water against drainage. This parameter affects water retention capacity, gas diffusion rates, and determines the fraction of pore space available for capillary water storage in soil water balance models. FracSoiAsMicP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Micropore fraction 1 The proportion of soil volume occupied by large pore spaces that facilitate rapid water and gas movement. This parameter controls preferential flow, drainage efficiency, and soil aeration, playing a critical role in modeling bypass flow and chemical transport through structured soils. SoilFracAsMacP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Macropore fraction 1 The average distance between adjacent macropore channels in soil, representing spatial connectivity of large pores. This parameter affects diffusion pathways for gases and solutes, influences macropore flow interactions, and is essential for modeling three-dimensional transport processes in structured soils. PathLenMacPore_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Path length between macropores m The average radius of large pore channels in soil, representing the size of rapid flow pathways. This parameter determines flow velocity through macropores, affects capillary forces, and is fundamental for modeling preferential water movement and chemical transport in structured soils. MacPoreRadius_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Radius of macropores m The mass of dry soil per unit volume including pore spaces, representing soil compaction and structure. This parameter affects porosity, water storage capacity, root penetration resistance, and is fundamental for converting between mass-based and volume-based soil property measurements. SOIL_CHEM_BD SoilBulkDensity_vr bulk_density ATS: bulk_density, computed in the ATS-EcoSIM coupling from density_rock and porosity. HWSD2: BULK [g/cm3] in HWSD2_LAYERS and BULK_DENSITY in HWSD2_SMU. AmeriFlux BADM variable name: SOIL_CHEM_BD. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Soil bulk density Mg.m-3 g.cm-3 The count of large pore channels per unit area or volume of soil, representing macropore density. This parameter affects flow capacity through preferential pathways, influences connectivity of rapid flow networks, and is essential for modeling macropore flow dynamics in structured soils. MacPoreNumbers_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Number of macropores 1 The total volume of small pore spaces within a soil layer, representing micropore storage capacity. This parameter determines water retention potential, gas diffusion capacity, and controls the volume available for capillary water storage and slow gas exchange processes. VLSoilPoreMicP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Volume of soil occupied by micropores m3/{grid} The total volume of small pore spaces in soil, representing the capacity for capillary water retention. This parameter controls water holding capacity, affects gas diffusion rates, and determines the storage volume for plant-available water in soil hydrological models. VLSoilMicP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Volume of micropores m3/{grid} The total dry mass of soil solids within a defined layer, representing the solid phase content. This parameter is fundamental for calculating bulk density, nutrient storage capacity, and converting between mass-based and area-based measurements in ecosystem and agricultural models. VLSoilMicPMass_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Mass of soil layer Mg/{grid} The lowest allowable dry mass of soil solids within a layer, representing minimum density constraints. This parameter prevents unrealistic soil thinning in dynamic models, maintains structural integrity assumptions, and sets lower bounds for soil mass in erosion and compaction simulations. SoilMicPMassLayerMn Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Minimum soil layer mass Mg/{grid} The highest allowable dry mass of soil solids within a layer, representing maximum compaction limits. This parameter prevents unrealistic soil densification in models, sets upper bounds for bulk density, and constrains maximum soil mass in compaction and sedimentation processes. SoilMicPMassLayerMX Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Maximum soil layer mass Mg/{grid} The combined volume of all small pore spaces within a soil layer, representing total micropore capacity. This parameter determines maximum water retention potential, controls gas diffusion capacity, and provides the total volume available for capillary water storage and slow transport processes. VLMicP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Total micropore volume in layer m3/{grid} The combined volume of all large pore spaces within a soil layer, representing total macropore capacity. This parameter determines maximum rapid flow capacity, controls drainage efficiency, and provides the total volume available for preferential water movement and fast gas exchange. VLMacP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Total macropore volume in layer m3/{grid} The total geometric volume of a soil layer including all pore spaces and rock fragments, representing complete layer volume. This parameter provides the reference volume for calculating porosity, bulk density, and mass balance relationships in soil physical and biogeochemical models. VGeomLayer_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Soil volume including macropores and rock m3/{grid} The total geometric volume of a soil layer at simulation start, including all pore spaces and rock fragments. This parameter provides baseline volume conditions for tracking soil structural changes, compaction, and erosion processes over time in dynamic ecosystem models. VGeomLayert0_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Initial soil volume including macropores and rock m3/{grid} The upper limit for total pore space volume within a soil layer, representing maximum porosity constraints. This parameter prevents unrealistic pore expansion in models, maintains physical consistency in soil structure, and sets upper bounds for water storage and gas exchange capacity. VOLTX_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilPropertyDataType.txt Maximum soil pore (macropore and micropore) volume allowed m3/{grid} The amount of thermal energy required to raise the temperature of a unit volume of snowpack by one degree. This parameter depends on snow density and ice content, and controls snowpack temperature dynamics, melting rates, and thermal insulation properties over underlying soil. VLSnowHeatCapM_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Volumetric heat capacity of snowpack MJ.K-1/{grid} The volumetric flow rate of liquid water through snowpack layers, representing internal water movement. This parameter controls meltwater percolation, refreezing processes, and water delivery to underlying soil, making it essential for modeling snowmelt hydrology and seasonal water balance. WatFlowInSnowM_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snowpack water flux m3.h-1/{grid} The horizontal transport rate of dry snow by wind redistribution processes, representing snow movement across the landscape. This parameter affects spatial snow distribution patterns, accumulation in sheltered areas, and erosion from exposed surfaces in alpine and arctic environments. DrySnoFlxByRedistM_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Runoff snow flux m3/{grid}/{step} The fraction of incoming solar radiation reflected by the snow surface back to the atmosphere. This parameter controls snow surface energy balance, melting rates, and seasonal snow persistence, significantly affecting local and regional climate through snow-albedo feedback mechanisms. SnowAlbedo_col SoilAlbedo_col surface-snow_albedo ATS: surface-snow_albedo [-], written into EcoSIM SnowAlbedo_col in the ATS-EcoSIM coupling. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snowpack albedo 1 The mass per unit volume of freshly fallen snow, representing initial compaction state. This parameter affects thermal properties, metamorphism rates, and subsequent densification processes, influencing snowpack insulation capacity and meltwater production timing in seasonal snow models. NewSnowDens_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt New snowpack density Mg.m-3 The thermal state of snow layers within a snowpack, measured in degrees Celsius or Kelvin. This parameter controls snow metamorphism, melting rates, sublimation processes, and ice formation, making it fundamental for predicting snowmelt timing and water resource availability. TCSnow_snvr TSN snow-temperature ATS: snow-temperature [K]. AmeriFlux FP-Standard base name: TSN. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snow temperature Cel K Heat capacity of a snowpack layer, totalled over the grid cell, the sum of the heat capacities of its dry snow, liquid water, and ice. It controls how the layer's temperature and melt respond to heat fluxes. VLHeatCapSnow_snvr Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), from the EcoSIM source (StartsMod.F90, SoilLayerDynMod.F90, SnowPhysMod.F90) for issue #98 SnowDataType.txt Snowpack heat capacity MJ.K-1/{grid} The volume of liquid water that would result from melting the solid ice component within a snowpack layer. This parameter represents the water storage potential of dry snow, essential for hydrological modeling and water resource assessment in snow-dominated watersheds. VLDrySnoWE_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Water equivalent dry snow in snowpack layer m3/{grid} The volume of liquid water currently present within a snowpack layer, representing unfrozen moisture content. This parameter affects snowpack density, thermal properties, and runoff potential, controlling meltwater percolation and refreezing processes in layered snow models. VLWatSnow_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snow water volume in snowpack layer m3/{grid} The volume of frozen water (ice) within a snowpack layer, representing the solid component of snow mass. This parameter controls snowpack density, thermal properties, and water storage capacity, affecting metamorphism rates and meltwater production in seasonal snow evolution models. VLIceSnow_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snow ice volume in snowpack layer m3/{grid} The total three-dimensional space occupied by snow material within a specific snowpack layer. This parameter includes both ice and air space components, controlling layer porosity, density calculations, and thermal properties in multi-layer snowpack energy balance models. VLSnoDWIprev_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snow volume in snowpack layer m3/{grid} The mass of snow per unit volume within a snowpack layer, representing compaction state and water equivalent. This parameter controls thermal conductivity, albedo characteristics, metamorphism rates, and mechanical properties affecting avalanche risk and meltwater production timing. SnoDens_snvr snow-density ATS: snow-density [kg m-3]. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snowpack density Mg.m-3 kg.m-3 The vertical dimension of individual snow layers within a stratified snowpack profile. This parameter controls thermal gradients, metamorphism processes, and mechanical stability, essential for avalanche assessment and detailed snowpack energy balance modeling. SnowThickL_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snowpack layer thickness m The volumetric rate of liquid water movement between snowpack layers on an hourly basis. This parameter controls internal drainage, refreezing processes, and vertical water redistribution, affecting snowpack thermal evolution and meltwater delivery timing. WatXfer2SnoLay_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Hourly snow water transfer m3.h-1/{grid} The depth of snow mass transferred to individual snowpack layers per hour, representing redistribution processes. This parameter controls layer development, densification patterns, and vertical mass distribution within multilayer snowpack models used for avalanche and hydrological forecasting. SnoXfer2SnoLay_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Hourly snow transfer to each layer m.h-1/{grid} The depth of ice mass transferred to individual snowpack layers per hour, representing refreezing and redistribution. This parameter controls ice lens formation, layer bonding strength, and thermal properties affecting snowpack stability and meltwater percolation pathways. IceXfer2SnoLay_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Hourly snow ice transfer to each layer m.h-1/{grid} The thermal energy transported by liquid water movement between snowpack layers per hour. This parameter represents convective heat transfer accompanying water percolation, affecting layer temperatures, refreezing rates, and thermal evolution of stratified snowpacks. HeatXfer2SnoLay_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Hourly convective heat flux from water transfer MJ.h-1/{grid} The total count of distinct snow layers within a vertical snowpack profile. This parameter determines model complexity, computational requirements, and resolution of thermal and mechanical processes in detailed snowpack evolution and avalanche hazard assessment models. nsnol_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Number of snow layers in column 1 The total depth from the surface to the bottom boundary of each individual snowpack layer in multi-layer snow models. This parameter tracks the progressive accumulation of snow thickness and is essential for modeling snowpack stratigraphy, thermal profiles, and meltwater movement through heterogeneous snow layers. cumSnowDepz_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Cumulative depth to bottom of snowpack layer m The upper limit of snow volume that can be accommodated within individual snowpack layers before redistribution occurs. This parameter controls snow layer thickness constraints and mass transfer between layers, essential for maintaining numerical stability and realistic snowpack structure in snow evolution models. VLSnoDWIMax_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Maximum snowpack volume allowed in each layer m3/{grid} The total vertical thickness of snow cover from ground surface to snow surface. This parameter represents water storage potential, insulation capacity, and habitat modification effects, fundamental for hydrological forecasting, avalanche assessment, and ecosystem impact studies. D_SNOW SnowDepth_col snow-depth surface-snow_depth ATS: surface-snow_depth and snow-depth [m]. ODM2 variable name concept "Snow depth": Snow depth. ODM2 variable name concept "Depth, snow": Depth of snow. AmeriFlux FP-Standard base name: D_SNOW. AmeriFlux reports it in cm. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snowpack depth m The total volume of liquid water that would result from completely melting all accumulated snow. This parameter represents the water storage capacity of the entire snowpack, essential for seasonal water resource assessment and flood forecasting in snow-dominated watersheds. VcumDrySnoWE_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snow volume in snowpack (water equivalent) m3/{grid} The total volume of liquid water currently present within the entire snowpack including free water and wet snow. This parameter affects snowpack stability, runoff timing, and avalanche risk, representing immediately available water for drainage and refreezing processes. VcumWatSnow_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Water volume in snowpack m3/{grid} The total volume of frozen water (ice) contained within the entire snowpack profile. This parameter represents the solid water storage component, controlling thermal properties, mechanical strength, and metamorphism rates affecting seasonal snowpack evolution and water release timing. VcumIceSnow_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Ice volume in snowpack m3/{grid} The total volume occupied by dry snow components including ice crystals and air spaces but excluding liquid water. This parameter represents the structural framework of the snowpack, controlling porosity, density evolution, and metamorphism processes in seasonal snow models. VcumSnoDWI_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Dry snow volume m3/{grid} The total volume of liquid water that would result from melting all snow components in the entire snowpack. This parameter integrates both ice and liquid water content, representing total water storage for hydrological forecasting and water resource management applications. VcumSnowWE_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Water equivalent snowpack m3/{grid} The lowest allowable thermal energy storage capacity for the entire snowpack column per unit temperature change. This parameter sets numerical constraints in snow models, preventing unrealistic thermal behavior and maintaining computational stability in energy balance calculations. VLHeatCapSnowMin_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Minimum layer integrated snowpack heat capacity MJ.K-1/{grid} The volumetric flow rate of liquid water transfer from snowpack base to soil micropore spaces. This parameter controls infiltration into fine soil pores, affecting soil moisture storage, plant water availability, and groundwater recharge in snow-covered ecosystems. WatConvSno2MicP_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Water from snowpack to soil micropores m3.h-1/{grid} The volumetric flow rate of meltwater transferring from snowpack layers directly into large soil pore spaces and preferential flow paths. This parameter quantifies rapid water infiltration through macropore systems during snowmelt events, critical for understanding spring flood generation and groundwater recharge in snow-covered watersheds. WatConvSno2MacP_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Water from snowpack to soil macropores m3.h-1/{grid} The thermal energy flux transported from snowpack layers to underlying soil through convective processes involving meltwater movement. This parameter quantifies heat transfer mechanisms that warm frozen soils during snowmelt periods, essential for modeling soil thaw dynamics and permafrost stability in cold regions. HeatConvSno2Soi_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Convective heat from snowpack to soil MJ.h-1/{grid} The volumetric flow rate of liquid water transfer from snowpack base to surface litter layer. This parameter controls moisture delivery to organic surface horizons, affecting decomposition rates, nutrient cycling, and forest floor ecosystem processes. WatConvSno2LitR_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Water flux from snowpack to litter m3.h-1/{grid} The thermal energy transfer rate from snowpack to surface litter layer through liquid water movement. This parameter affects litter temperature, decomposition rates, and microbial activity in organic surface horizons beneath snowpack. HeatConvSno2LitR_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Convective heat flux from snowpack to litter MJ.h-1/{grid} The volumetric flow rate of dry snow transport by wind redistribution processes across the landscape. This parameter represents snow erosion from windward areas and deposition in sheltered locations, affecting spatial snow distribution patterns and local water balance. DrySnoByRedistrib_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snowpack runoff snow m3.h-1/{grid} The volumetric flow rate of liquid water runoff from snowpack during redistribution events. This parameter represents surface water flow from melting snow or rain-on-snow events, contributing to peak discharge generation and flood risk in snow-dominated watersheds. WatSnoByRedist_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snowpack runoff water m3.h-1/{grid} The volumetric flow rate of ice transport during snowpack redistribution and surface runoff events. This parameter represents ice formation from refrozen meltwater and subsequent transport, affecting channel blockage, flood timing, and downstream ice jam formation in cold regions. IceSnoBySnowRedist_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snowpack runoff ice m3.h-1/{grid} The thermal energy transport rate associated with snowpack runoff and redistribution processes. This parameter represents heat transfer accompanying liquid water and ice movement, affecting downstream thermal regimes and ecosystem temperature dynamics in snow-influenced watersheds. HeatSnoByRedist_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snowpack runoff heat MJ.h-1/{grid} The mass transfer rate of carbon dioxide from snowpack to other environmental compartments during runoff events. This parameter represents carbon cycle processes in snow-covered ecosystems, affecting soil respiration patterns and atmospheric carbon exchange in cold regions. trcg_FloXSnow_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snowpack runoff carbon dioxide flux g.h-1/{grid} The mass transfer rate of ammonium from snowpack to other environmental compartments during runoff events. This parameter represents nitrogen cycling processes in snow-dominated ecosystems, affecting nutrient delivery to soils and downstream water quality. trcn_FloXSnow_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snowpack runoff ammonium flux g.h-1/{grid} The cumulative thermal energy involved in melting and refreezing processes within the entire snowpack. This parameter represents latent heat exchange during phase transitions, controlling snowmelt timing, energy balance, and temperature stability of seasonal snowpacks. THeatSnowThaw_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Total heat associated with phase change in snow MJ.h-1/{grid} The mass of dissolved gaseous compounds in a snowpack layer in the grid cell, representing atmospheric deposition and retention. This parameter tracks volatile organic compounds and greenhouse gases in snow, affecting atmospheric chemistry and biogeochemical cycling in snow-covered ecosystems. trcg_solsml_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Dissolved volatile tracers in snow g/{grid} The mass of dissolved nutrient compounds in a snowpack layer in the grid cell, representing atmospheric deposition and biological uptake. This parameter tracks nitrogen, phosphorus, and other essential nutrients in snow, affecting nutrient cycling and ecosystem productivity following snowmelt. trcn_solsml_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Dissolved nutrient tracers in snow g/{grid} The molar amount of dissolved salt compounds in a snowpack layer in the grid cell, representing road salt deposition and natural salinity. This parameter affects snowpack density, melting point depression, and water quality during snowmelt, particularly important in urban and coastal environments. trcSalt_ml_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snowpack salt dissolved tracers mol/{grid} The cumulative thermal energy content stored within the entire snowpack at the start of a simulation time interval. This parameter establishes initial thermal state for energy balance calculations, controlling subsequent melting, refreezing, and temperature evolution processes. SnowEngyBeg_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Total snow-held energy at the beginning of the time step MJ/{grid} The cumulative thermal energy content stored within the entire snowpack at the end of a simulation time interval. This parameter reflects net energy changes from radiation, conduction, and phase transitions, determining snowpack thermal state evolution. SnowEngyEnd_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Total snow-held energy at the end of the time step MJ/{grid} The total water equivalent mass of the snowpack at the start of a simulation time interval. This parameter establishes initial water storage conditions for mass balance calculations, tracking snow accumulation and ablation processes throughout the simulation period. SnowMassBeg_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snow mass water eqv at the beginning of the time step m3{H2O}/{grid} The total water equivalent mass of the snowpack at the end of a simulation time interval. This parameter reflects net changes from precipitation, sublimation, and melting, representing final water storage state for mass balance verification and subsequent time step initialization. SnowMassEnd_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snow mass water eqv at the end of the time step m3{H2O}/{grid} The cumulative molar content of dissolved salts transported during snow drift and redistribution events. This parameter represents salt mobilization through wind-blown snow, affecting spatial distribution of deicing compounds and natural salts across the landscape. trcSalt_FloXSnow_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Total salt in snow drift mol.h-1/{grid} The volumetric flow rate of precipitation falling as snow and accumulating in the snowpack. This parameter represents snow accumulation from atmospheric moisture, controlling snowpack mass balance and seasonal water storage in snow-dominated watersheds. Prec2Snow_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Precipitation to snow m3{H2O}.h-1/{grid} The thermal energy flux delivered to snowpack through incoming precipitation, including sensible heat content. This parameter affects snowpack temperature, melting rates, and energy balance, particularly important during rain-on-snow events that can trigger rapid snowmelt. PrecHeat2Snow_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Precipitation heat to snow MJ.h-1/{grid} The volumetric flow rate of water equivalent leaving the snowpack and transferring to alternative water storage compartments such as soil or groundwater. This parameter quantifies water redistribution from snow systems to other hydrological reservoirs, essential for tracking water balance and snowmelt contributions to different storage pools. QSnowH2Oloss_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Snow water equivalent loss to other storage m3{H2O}.h-1/{grid} The cumulative thermal energy flux lost from the entire snowpack to surrounding environment through all heat transfer mechanisms. This parameter includes radiative, conductive, and convective losses, controlling snowpack cooling, refreezing processes, and thermal evolution. QSnowHeatLoss_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Total heatloss from snow MJ.h-1/{grid} The mass transfer rate of dissolved volatile compounds from snowpack to surface litter layer through liquid water transport. This parameter represents contaminant and atmospheric deposition transfer, affecting biogeochemical cycling and soil chemistry in forest floor ecosystems. trcg_AquaADV_Snow2Litr_flx Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Aqueous volatile tracer from snow to litter g.h-1/{grid} The mass transfer rate of dissolved nutrients from snowpack to surface litter layer through liquid water transport. This parameter controls nutrient delivery from atmospheric deposition, affecting decomposition rates and ecosystem productivity in organic surface horizons. trcn_AquaADV_Snow2Litr_flx Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Aqueous nutrient tracer from snow to litter g.h-1/{grid} The mass transfer rate of dissolved volatile compounds from snowpack to underlying soil through infiltration processes. This parameter represents atmospheric contaminant delivery to soil systems, affecting soil chemistry and potential groundwater contamination pathways. trcg_AquaADV_Snow2Soil_flx Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Aqueous volatile tracer from snow to soil g.h-1/{grid} The mass transfer rate of dissolved nutrients from snowpack to underlying soil through infiltration processes. This parameter controls nutrient input from atmospheric deposition, affecting soil fertility and plant nutrient availability following snowmelt events. trcn_AquaADV_Snow2Soil_flx Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Aqueous nutrient tracer from snow to soil g.h-1/{grid} The mass transfer rate of dissolved nutrients from snowpack to laterally adjacent soil bands through lateral flow processes. This parameter represents nutrient redistribution across topographic gradients, affecting spatial patterns of soil fertility and vegetation productivity. trcn_AquaADV_Snow2Band_flx Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Aqueous nutrient tracer from snow to band soil g.h-1/{grid} The molar transfer rate of dissolved salts from snowpack to underlying soil through infiltration processes. This parameter controls salt input from deicing applications and atmospheric deposition, affecting soil salinity and plant stress in snow-covered environments. trcSalt_AquaADV_Snow2Soil_flx Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Salt flux from snow to soil mol.h-1/{grid} The molar transfer rate of dissolved salts from snowpack to surface litter layer through liquid water transport. This parameter affects litter chemistry and decomposition processes, particularly important in roadside and urban environments with high salt loading. trcSalt_AquaADV_Snow2Litr_flx Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Salt flux from snow to litter mol.h-1/{grid} The cumulative mass of volatile compounds stored within the entire snowpack at the beginning of the previous simulation time step. This parameter establishes initial tracer conditions for mass balance calculations and temporal tracking of atmospheric contaminant storage. trcg_snowMass_beg_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Total mass of volatile tracer in snow at previous time step g/{grid} The cumulative mass of volatile compounds currently stored within the entire snowpack profile. This parameter represents atmospheric contaminant accumulation in snow, controlling chemical reservoir size and potential environmental release during snowmelt events. trcg_snowMass_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Total mass of volatile tracer in snow g/{grid} The cumulative mass transfer rate of volatile compounds lost from the entire snowpack through all removal processes. This parameter includes sublimation, evaporation, and runoff losses, representing total contaminant export from snow storage to other environmental compartments. trcg_snowMassloss_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Total volatile mass of tracer loss from snow g.h-1/{grid} The cumulative mass transfer rate of nutrients lost from the entire snowpack through all export processes. This parameter represents total nutrient mobilization from atmospheric deposition storage, affecting ecosystem nutrient budgets and downstream water quality. trcn_snowMassloss_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Total nutrient mass of tracer loss from snow g.h-1/{grid} The cumulative mass transfer rate of salts lost from the entire snowpack through all export processes. This parameter represents total salt mobilization from deicing and atmospheric inputs, affecting soil salinity and downstream water quality during snowmelt. trcSalt_snowMassloss_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Total salt mass of tracer loss from snow g.h-1/{grid} The mass transport rate of volatile chemical tracers dissolved in liquid water moving through snowpack layers via advection processes. This parameter quantifies the movement of gaseous contaminants and tracers in snowmelt water, essential for understanding pollutant transport and atmospheric deposition fate in snow-covered environments. trcg_AquaAdv_flx_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Aqueous volatile tracer flux in snow g.h-1/{grid} The mass transport rate of nutrient chemical tracers dissolved in liquid water moving through snowpack layers via advection processes. This parameter quantifies the movement of nitrogen, phosphorus, and other nutrients in snowmelt water, essential for understanding nutrient cycling and ecosystem fertilization during snowmelt periods. trcn_AquaAdv_flx_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Aqueous nutrient tracer flux in snow g.h-1/{grid} The mass transfer rate of dissolved salts through liquid water movement within snowpack layers. This parameter controls salt redistribution through percolating water, affecting ionic concentrations and timing of salt delivery to underlying soils. trcSalt_AquaAdv_flx_snvr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Aqueous salt tracer flux through snow g.h-1/{grid} A logical indicator controlling snow redistribution calculations during intermediate computational iterations in numerical models. This parameter manages the activation of wind-driven snow transport processes, ensuring computational efficiency and numerical stability in complex terrain simulations. IFLBSM_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Flag for snow redistribution in intermediate iterations 1 The mass transfer rate of nutrients lost from snowpack through wind-driven snow transport and redistribution. This parameter represents nutrient export through drifting snow, affecting spatial nutrient distribution and local ecosystem nutrient budgets. trcn_SnowDrift_flx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Nutrient loss from snow due to drifting g.h-1/{grid} The mass transfer rate of volatile compounds lost from snowpack through wind-driven snow transport and redistribution. This parameter represents contaminant export through drifting snow, affecting air quality and spatial pollutant distribution patterns. trcg_SnowDrift_flx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Volatile loss from snow due to drifting g.h-1/{grid} The molar transfer rate of salts lost from snowpack through wind-driven snow transport and redistribution. This parameter represents salt export through drifting snow, affecting local soil salinity patterns and downstream water quality impacts. trcSalt_SnowDrift_flx_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SnowDataType.txt Salt loss through snow drift mol.h-1/{grid} The molar amount of nitrogen fertilizer in a soil layer in the grid cell from broadcast application. This parameter represents nutrient availability from uniform surface spreading, affecting crop nitrogen uptake and potential nitrate leaching in agricultural systems. FertN_mole_soil_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) FertilizerDataType.txt Fertilizer in soil from broadcast mol/{grid} The molar amount of nitrogen fertilizer in a soil layer in the grid cell, applied in concentrated bands adjacent to crop rows through side-dressing techniques. This parameter represents localized nutrient placement for targeted root uptake, improving fertilizer use efficiency and reducing environmental losses. FertN_mole_Band_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) FertilizerDataType.txt Fertilizer in band from side-dressing mol/{grid} The proportion of soil volume that is physically disturbed and mixed during tillage operations. This parameter controls nutrient redistribution, organic matter incorporation, and soil structure modification, affecting seedbed preparation and fertilizer placement efficiency. DepzCorp_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) FertilizerDataType.txt Soil mixing fraction with tillage 1 The mass of fertilizer nutrients applied per unit land area to enhance crop productivity and soil fertility. This parameter controls nutrient input rates, affecting plant growth, yield potential, and environmental risks from excess nutrient loading in agricultural ecosystems. FERT Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) FertilizerDataType.txt Fertilizer application g.m-2 Depth of fertilizer application refers to the distance below the surface of the soil at which fertilizers are applied. Different crops and soils may require different application depths for optimal nutrient absorption and to minimize nutrient losses due to leaching or erosion. It is an important parameter in agricultural modeling and management, directly influencing the effectiveness and environmental impact of fertilization practices. FDPTH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) FertilizerDataType.txt Depth of fertilizer application m The horizontal distance between fertilizer bands applied through side-dressing techniques in row crop systems. This parameter controls spatial nutrient distribution, root access to fertilizer, and crop utilization efficiency in precision agriculture applications. ROWI Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) FertilizerDataType.txt Row spacing of fertilizer band from side-dressing m The horizontal distance between ammonium fertilizer bands applied through side-dressing in row crop production systems. This parameter controls spatial distribution of ammonium nitrogen, affecting root uptake patterns and reducing volatilization losses in precision fertilizer management. ROWSpaceNH4_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) FertilizerDataType.txt Row spacing of ammonium fertilizer band from side-dressing m The horizontal distance between nitrate fertilizer bands applied through side-dressing in row crop production systems. This parameter controls spatial distribution of nitrate nitrogen, affecting root uptake efficiency and reducing leaching potential in precision agriculture systems. ROWSpaceNO3_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) FertilizerDataType.txt Row spacing of nitrate fertilizer band from side-dressing m The horizontal distance between phosphate fertilizer bands applied through side-dressing in row crop production systems. This parameter controls spatial distribution of phosphorus, affecting root access to phosphate and improving fertilizer use efficiency in precision agriculture. ROWSpacePO4_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) FertilizerDataType.txt Row spacing of phosphate fertilizer band from side-dressing m The sine trigonometric function of the angle between leaf surfaces and horizontal plane in plant canopies. This parameter controls solar radiation interception geometry, affecting photosynthesis rates, energy balance, and light penetration through vegetation layers. SineLeafAngle CanopyRadDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Sine of leaf angle 1 The cosine trigonometric function of the angle between leaf surfaces and horizontal plane in plant canopies. This parameter controls solar radiation interception efficiency, affecting leaf energy absorption, temperature regulation, and photosynthetic light use in vegetation modeling. CosineLeafAngle CanopyRadDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Cosine of leaf angle 1 The sine trigonometric function describing the geometric relationship between diffuse sky radiation and leaf surface orientation. This parameter controls diffuse light interception by leaves, affecting photosynthesis under cloudy conditions and within shaded canopy layers. OMEGA CanopyRadDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Sine of indirect sky radiation on leaf surface 1 The ratio of sine functions relating leaf surface orientation to diffuse sky radiation geometry. This parameter normalizes diffuse light interception calculations, controlling relative efficiency of scattered radiation absorption across different leaf angles and canopy positions. OMEGX CanopyRadDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Sine of indirect sky radiation on leaf surface/sine of indirect sky radiation 1 A logical indicator controlling whether to include multiple scattering of reflected radiation within vegetation canopies. This parameter activates complex radiative transfer calculations, improving accuracy of light distribution and photosynthesis modeling in dense vegetation. iScatteringDiffus CanopyRadDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Flag for calculating backscattering of radiation in canopy NA The flux density of scattered photosynthetically active radiation reaching plant canopies from all sky directions without direct solar beam contribution. This parameter controls light availability for photosynthesis under cloudy conditions and within forest understories, essential for modeling plant productivity and carbon assimilation. RadDifPAR_zsec CanopyRadDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Diffuse incoming photosynthetically active radiation umol.m-2.s-1 The flux density of direct solar photosynthetically active radiation (400-700 nanometers) reaching vegetation canopies. This parameter represents primary energy source for photosynthesis, controlling carbon assimilation rates and plant productivity in terrestrial ecosystems. RadPAR_zsec CanopyRadDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Direct incoming photosynthetically active radiation umol.m-2.s-1 The proportion of leaves distributed across different angular orientation categories within vegetation canopies. This parameter controls solar radiation interception efficiency, affecting photosynthesis patterns and energy balance across different canopy layers and plant functional types. LeafAngleClass_pft CanopyRadDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Fractionation of leaves in different angle classes 1 The total surface area of leaf material within specific canopy layers or branch segments of vegetation. This parameter controls gas exchange capacity, radiation interception, and transpiration rates, fundamental for modeling photosynthesis and water balance in terrestrial ecosystems. LeafAreaZsec_brch CanopyRadDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Leaf surface area m2/{grid} The surface area of leaf material directly exposed to solar radiation without shading from other vegetation elements. This parameter controls light-saturated photosynthesis rates and leaf energy balance, affecting carbon assimilation and temperature regulation in plant canopies. LeafAUnshaded_zsec CanopyRadDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Leaf irradiated surface area m2/{grid} The total external surface area of woody stems and branches within specific canopy layers or vegetation segments. This parameter affects radiation interception, energy balance, and gas exchange processes in woody vegetation, influencing ecosystem carbon and energy fluxes. StemAreaZsec_brch CanopyRadDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Stem surface area m2/{grid} The mass of carbon contained in surface litter at the beginning of simulation or measurement periods. This parameter represents the initial organic carbon pool available for decomposition, affecting soil carbon cycling, nutrient release, and ecosystem productivity in terrestrial environments. RSC_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Initial surface litter carbon g.m-2 The mass of nitrogen contained in surface litter at the beginning of simulation or measurement periods. This parameter represents the initial nitrogen pool available for mineralization, controlling nutrient availability and decomposition rates in surface organic horizons. RSN_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Initial surface litter nitrogen g.m-2 The mass of phosphorus contained in surface litter at the beginning of simulation or measurement periods. This parameter represents the initial phosphorus pool available for cycling, affecting nutrient availability and limiting productivity in phosphorus-constrained ecosystems. RSP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Initial surface litter phosphorus g.m-2 The proportion of soil organic carbon allocated to different kinetic decomposition pools with varying turnover rates. This parameter controls carbon cycling dynamics, determining decomposition rates and carbon storage potential across active, slow, and passive soil organic matter pools. CFOSC_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Fraction of soil organic carbon in kinetic components 1 The nitrogen-to-carbon elemental ratios of different soil organic carbon kinetic pools with distinct decomposition rates. This parameter controls nitrogen availability during organic matter decomposition and affects microbial carbon use efficiency, essential for modeling nutrient cycling and carbon-nitrogen interactions in soil systems. CNOSC_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt N:C ratios of soil organic carbon kinetic components g.g-1 The phosphorus to carbon mass ratios within different kinetic pools of soil organic matter. This parameter controls phosphorus cycling during decomposition, affecting phosphorus availability and potential limitations on plant growth and microbial activity. CPOSC_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt P:C ratios of soil organic carbon kinetic components g.g-1 The mass of chemical elements contained within solid organic matter fractions including humified plant and microbial residues. This parameter represents stable organic matter pools that control long-term carbon storage and nutrient cycling in soil ecosystems. SolidOM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Humus soil organic material chemical element g/{grid} The cumulative mass of carbon in actively decomposing solid organic matter pools within soil layers. This parameter represents readily available carbon for microbial metabolism, controlling short-term carbon cycling and nutrient mineralization rates. TSolidOMActC_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Total active solid organic carbon g{C}/{grid} The cumulative mass of carbon contained in all solid organic matter fractions within soil layers. This parameter represents total carbon storage in particulate and humified organic matter, fundamental for soil carbon cycling and climate regulation. TSolidOMC_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Total solid organic carbon g{C}/{grid} The mass of carbon contained within actively metabolizing heterotrophic microbial biomass in soil layers. This parameter controls decomposition rates, nutrient cycling, and soil respiration, representing the living component of soil organic matter pools. tOMActC_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Active heterotrophic microbial carbon in layer g{C}/{grid} The mass of chemical elements bound to soil mineral surfaces through adsorption processes within organic matter complexes. This parameter controls nutrient retention, chemical stability, and long-term storage of elements in mineral-organic associations. SorbedOM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Adsorbed soil organic material chemical element g/{grid} The mass of chemical elements contained within dead microbial biomass and metabolic byproducts in soil organic matter. This parameter represents microbial-derived carbon and nutrients that contribute to soil organic matter formation and nutrient cycling processes. OMBioResdu_vr SOMDataType.txt Microbial residue chemical element g/{grid} The mass of dissolved organic compounds present within soil micropore water phases. This parameter represents mobile organic matter that controls nutrient transport, microbial substrate availability, and chemical reactions in fine soil pore networks. DOM_MicP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Dissolved organic matter in micropore g/{grid} The mass of dissolved organic compounds present within soil macropore water phases. This parameter represents rapidly mobile organic matter that controls leaching losses, lateral transport, and ecosystem connectivity through preferential flow pathways. DOM_MacP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Dissolved organic matter in macropore g/{grid} The cumulative mass of all organic matter components present within soil profiles, including particulate, dissolved, and mineral-associated fractions. This parameter represents total soil carbon storage and fertility, fundamental for understanding carbon sequestration, soil structure, and nutrient cycling capacity in terrestrial ecosystems. SoilOrgM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Total soil organic matter g/{grid} The mass of organic carbon per unit mass of soil, representing carbon content from decomposed plant and animal matter. This parameter controls soil fertility, structure, and carbon storage capacity, fundamental for soil quality assessment and carbon cycle modeling. SOC concentration ORGCX_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Soil organic carbon concentration g.Mg-1 g.g-1 The mass of carbon within humus fractions that are actively colonized by microbial communities in soil organic matter complexes. This parameter represents bioactive carbon pools that control decomposition rates and nutrient cycling in stabilized organic matter. SolidOMAct_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Colonized humus carbon in each complex g/{grid} The cumulative mass of carbon contained in all particulate organic matter fractions derived from plant litter inputs. This parameter represents readily decomposable carbon pools that control short-term carbon cycling and nutrient release in soil ecosystems. OMLitrC_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Total particulate organic carbon g/{grid} The mass of organic matter per unit mass of soil, representing total organic content from all sources. This parameter controls soil physical properties, nutrient retention capacity, and biological activity in terrestrial ecosystems. CSoilOrgM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Soil organic matter content g.kg-1 The mass of carbon from particulate litter fractions per unit mass of soil, representing carbon inputs from plant debris. This parameter controls rapid carbon cycling and initial decomposition processes in soil organic matter dynamics. COMLitrC_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Soil litter particulate carbon content g.kg-1 The proportional distribution coefficient controlling the partitioning of chemical elements from microbial litter to particulate organic matter pools. This parameter determines element allocation pathways during decomposition, affecting nutrient availability and organic matter formation in soil ecosystems. ElmAllocmatMicrblitr2POM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Allocation coefficient to humus fractions 1 The cumulative mass of chemical elements contained within all living microbial biomass throughout the soil profile. This parameter represents the active biological component controlling decomposition, nutrient cycling, and biochemical transformations in soil ecosystems. tMicBiome_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Total microbial biomass chemical element g/{grid} The cumulative mass of all organic matter components in soil excluding living plant roots but including litter, humus, and microbial biomass. This parameter represents total soil organic matter storage controlling carbon sequestration and ecosystem functioning. tSoilOrgM_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Total soil organic matter, include everything organic (exclude live roots) g/{grid} The cumulative mass of chemical elements contained within all litter fractions throughout the soil profile. This parameter represents element inputs from plant debris that control nutrient cycling and initial decomposition processes in soil ecosystems. tLitrOM_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Total litter chemical element g/{grid} The mass of specific chemical elements present within litter layers distributed across different soil depths or canopy positions. This parameter quantifies element storage in detrital organic matter, controlling nutrient release patterns and biogeochemical cycling rates in forest floor and soil surface environments. litrOM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Vertical layered litter chemical element g/{grid} The cumulative mass of specific chemical elements contained within all humus fractions throughout soil profiles. This parameter represents element storage in highly decomposed organic matter, controlling long-term nutrient retention and release in stable soil organic matter pools. tHumOM_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Total humus chemical element g/{grid} Partitioning coefficient between Particulate Organic Carbon (POC) and litter refers to the equilibrium ratio of the concentration of a chemical species in POC to the equilibrium concentration of the same species in litter. This coefficient is significant in the process of understanding the distribution and movement of nutrients in different organic matter compartments within an ecosystem. EPOC_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Partitioning coefficient between particulate organic carbon and litter 1 Partitioning coefficient between humus and microbial residue (EHUM) determines the proportion of carbon matter that is allocated between humus and the residues of microbes. It plays a crucial role in understanding the carbon cycle and its stability in ecosystems, particularly in soils where microbial residues represent a considerable fraction of stable organic matter. EHUM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Partitioning coefficient between humus and microbial residue 1 The mass of dissolved organic carbon per unit volume of soil water, representing mobile carbon compounds in soil solution. This parameter controls carbon leaching, microbial substrate availability, and ecosystem carbon losses through groundwater and surface water pathways. CDOM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Dissolved organic carbon concentration g.m-3 Fraction of total organic C in complex represents the proportion of the total organic carbon present in complex forms in the soil. Organic carbon in the soil is found in various forms, including simple, complex, soluble, and insoluble forms. Each form plays a unique role in soil processes, including nutrient availability, water retention, and soil structure maintenance. The fraction of total organic carbon in complex forms can help us understand the carbon storage potential of the soil. FracBulkSOMC_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Fraction of total organic carbon in complex 1 Total soil DIC refers to the total amount of Dissolved Inorganic Carbon in the soil. DIC in soil can originate from various sources such as decay of organic material, root respiration, carbonate dissolution, or atmospheric CO2 dissolution in water. It plays a crucial role in the carbon cycle of ecosystems, contributing to both carbon sequestration and greenhouse gas emissions. DIC_mass_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Total soil dissolved inorganic carbon g/{grid} Mass of nitrogen in the ammonium and ammonia of a soil profile, including its surface litter layer, counting dissolved ammonium, dissolved ammonia, and exchangeable ammonium. tNH4_col Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), nitrite correction for issue #79 SOMDataType.txt Total soil ammonium and ammonia content g{N}/{grid} Mass of nitrogen in the nitrate and nitrite dissolved in a soil profile, including its surface litter layer. tNO3_col Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), nitrite correction for issue #79 SOMDataType.txt Total soil nitrate and nitrite content g{N}/{grid} The proportion of surface litter that undergoes vertical mixing into underlying soil layers through biological and physical processes. This parameter controls organic matter incorporation rates, affecting soil carbon sequestration and vertical distribution of nutrients in soil profiles. FracLitrMix_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SOMDataType.txt Fraction of litter to be mixed downward 1 Soil Al content refers to the concentration or amount of aluminum (Al) present in the soil. This parameter is an important aspect of Earth system modeling as it influences various processes and interactions within the soil-plant system. High levels of soil Al content can negatively affect plant growth, nutrient uptake, and can even be toxic to certain plant species. Therefore, accurately quantifying and representing soil Al content in models is crucial for understanding and predicting various biogeochemical cycles and ecosystem dynamics. CAL_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Soil aluminum content mg{Al}.kg-1 Mass of iron per unit mass of soil, expressed as the element. It influences nutrient cycling, organic matter decomposition, and plant growth. CFE_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025); revised by Claude Opus 5.5 through Claude Code (Sep 24 2026) for issue #74 Soil iron content mg{Fe}.kg-1 Mass of calcium per unit mass of soil, expressed as the element. It influences nutrient availability, soil pH, and cation exchange capacity, and varies with parent material, weathering, leaching, and land management. CCA_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025); revised by Claude Opus 5.5 through Claude Code (Sep 24 2026) for issue #74 Soil calcium content mg{Ca}.kg-1 Soil Mg content refers to the concentration or amount of magnesium (Mg) present in the soil. It is a parameter that is used in Earth systems modeling to represent the level of magnesium in the soil, which plays a crucial role in various soil processes and functions. Soil Mg content is important for understanding nutrient availability, soil fertility, and the overall health and productivity of ecosystems. It can be quantified through laboratory analyses or estimated using remote sensing data or existing soil databases. CMG_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Soil magnesium content mg{Mg}.kg-1 Mass of sodium per unit mass of soil, expressed as the element. It influences soil fertility, nutrient cycling, and plant growth. CNA_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025); revised by Claude Opus 5.5 through Claude Code (Sep 24 2026) for issue #74 Soil sodium content mg{Na}.kg-1 Soil K content refers to the concentration or amount of potassium (K) present in the soil. It is a parameter in earth systems modeling that represents the availability of potassium to plants and the overall fertility of the soil. The soil K content is influenced by factors such as weathering of parent materials, deposition of potassium from atmospheric sources, and agricultural practices such as fertilizer application. CKA_vr SOIL_CHEM_K AmeriFlux BADM variable name: SOIL_CHEM_K. AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Soil potassium content mg{K}.kg-1 Soil SO4 content refers to the amount of sulfate (SO4) present in the soil. Sulfate is a form of sulfur, which is a crucial nutrient for plant growth. It plays a key role in protein synthesis and enzyme function in plants. Sulfate is also important for soil health as it contributes to soil fertility. CSO4_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Soil sulfate content mg{S}.kg-1 The mass of chlorine per unit mass of soil, expressed as the element and determined as chloride, the form in which most soil chlorine occurs. It influences soil salinity, nutrient cycling, and plant growth. CCL_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025); revised by Claude Opus 5 through Claude Code (Sep 18 2026) for issue #69 Soil chlorine content mg{Cl}.kg-1 Content of precipitated aluminum trihydroxide, Al(OH)3(s), in a soil layer, as mass of aluminum per mass of soil; an input that sets the initial amount of the precipitate. CALOH_vr AqueChemDatatype.txt Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) Soil aluminum trihydroxide content mg{Al}.kg-1 Content of precipitated iron(III) trihydroxide, Fe(OH)3(s), in a soil layer, as mass of iron per mass of soil; an input that sets the initial amount of the precipitate. CFEOH_vr AqueChemDatatype.txt Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) Soil iron(III) trihydroxide content mg{Fe}.kg-1 Soil CaCO3 content refers to the concentration or percentage of calcium carbonate (CaCO3) present in the soil. It is an important parameter in Earth systems modeling as it influences various soil properties and processes, such as soil pH, nutrient availability, water retention capacity, and soil carbon cycling. Soil CaCO3 content can be obtained through laboratory analysis or estimated using models based on soil properties and environmental conditions. CCACO_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Soil calcium carbonate content mg{Ca}.kg-1 Soil CaSO4 content refers to the concentration of calcium sulfate (CaSO4) in the soil. Calcium sulfate is a common mineral in soils and can play a significant role in soil fertility and nutrient availability. It affects soil structure, water holding capacity, and the balance of essential nutrients for plant growth. The soil CaSO4 content is an important parameter in earth systems modeling as it influences various soil processes and the overall functioning of ecosystems. CCASO_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Soil calcium sulfate content mg{Ca}.kg-1 Mass of aluminum phosphate (AlPO4) per unit mass of soil, expressed as its phosphorus. It binds and releases phosphorus, and so affects the phosphorus available to plants and other organisms. CALPO_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025); revised by Claude Opus 5.5 through Claude Code (Sep 24 2026) for issue #74 Soil aluminum phosphate content mg{P}.kg-1 Soil FePO4 content refers to the concentration or amount of iron phosphate (FePO4) present in the soil. Iron phosphate is an important component of soil minerals, affecting the availability and cycling of phosphorus in terrestrial ecosystems. The measurement of soil FePO4 content is relevant for Earth systems modeling as it can provide insights into nutrient availability, biogeochemical cycles, and ecosystem functioning. CFEPO_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Soil iron phosphate content mg{P}.kg-1 Soil CaHPO4 content refers to the concentration or amount of calcium hydrogen phosphate (CaHPO4) present in the soil. It is a parameter that is used in earth systems modeling to represent the level of CaHPO4 in the soil, which can influence soil fertility, nutrient availability, and plant growth. The measurement of soil CaHPO4 content helps in understanding the nutrient cycling and dynamics within an ecosystem, and it is essential for accurately simulating and predicting the behavior of earth systems. CCAPD_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Soil calcium hydrogen phosphate content mg{P}.kg-1 Soil apatite content refers to the amount or concentration of apatite minerals found in the soil. Apatite is a group of phosphate minerals that contain phosphorus, calcium, and other elements. It is an important component of many soils and plays a role in the biogeochemical cycling of phosphorus and the availability of this essential nutrient for plant growth. The measurement of soil apatite content is important in earth systems modeling as it provides information about the phosphorus dynamics and availability in the soil, which is crucial for understanding nutrient cycling, ecosystem productivity, and plant growth. CCAPH_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Soil apatite content mg{P}.kg-1 The Ca-NH4 Gapon selectivity coefficient (GKC4) represents the relative affinity or selectivity between calcium (Ca) and ammonium (NH4) cations being adsorbed onto soil particles. The Gapon selectivity coefficient is a measure used in soil science to explain the ion exchange between different cations in the soil. Cation exchange is an important process in soil fertility and nutrient management in agriculture. GKC4_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Ca-ammonium Gapon selectivity coefficient 1 The Ca-H Gapon selectivity coefficient refers to a value that represents the ability of a soil to preferentially adsorb calcium ions (Ca) over hydrogen ions (H). This value is derived from the Gapon equation, a model that describes ion-exchange reactions in soils. It is a crucial parameter in soil science and earth system modeling, as it helps in understanding ion exchange processes and nutrient availability in soils. GKCH_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Ca-H Gapon selectivity coefficient 1 Ca-Al Gapon selectivity coefficient (GKCA) is a parameter used in soil science to quantify the energy of exchange or selectivity between calcium (Ca) and aluminum (Al) ions in the soil. This value is particularly important for understanding nutrient availability in acidic soils, where Al toxicity can limit plant growth. The Gapon selectivity coefficient is calculated based on the ion concentrations and activity coefficients in the soil solution and exchangeable ions on the soil cation exchange complex. GKCA_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Ca-Al Gapon selectivity coefficient 1 The Ca-Mg Gapon selectivity coefficient (GKCM) is a measure used in soil chemistry to quantify the preferential adsorption or exchange between calcium (Ca) and magnesium (Mg) cations in the soil. It is used in soil fertility assessments and in modelling the nutrient dynamics in soils. GKCM_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Ca-Mg Gapon selectivity coefficient 1 The Ca-Na Gapon selectivity coefficient (GKCN) is a measure of the ion exchange selectivity of a soil, which indicates the affinity of a soil's exchange sites for calcium (Ca) in relation to sodium (Na). In situations where excess sodium is present in the soil, a low GKCN value would indicate the soil has a higher ability to retain calcium and prevent the undesirable effects of sodium. GKCN_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Ca-Na Gapon selectivity coefficient 1 Ca-K Gapon selectivity coefficient, represented as GK:CK, refers to the quantification of the preferential adsorption of calcium (Ca) and potassium (K) ions by soil particles. It indicates the affinity, or preference, of soil particles for one cation over another. Larger selectivity coefficients for a given cation indicate a stronger affinity for that cation. This parameter is crucial in soil science as it helps in understanding nutrient availability and soil fertility. GKCK_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Ca-K Gapon selectivity coefficient 1 The mass concentration of dissolved salt tracers present in incoming precipitation, representing atmospheric deposition of ionic compounds. This parameter quantifies salt inputs from marine sources, road deicing applications, and industrial emissions, affecting soil chemistry and ecosystem salt loading. trcsalt_rain_mole_conc_col AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Salt tracer concentration in rain g.m-3 The molar amount of dissolved salts in the micropore water of a soil layer in the grid cell. Held for each salt species, it is the store from which the salinity and electrical conductivity of the soil solution follow. trcSalt_solml_vr AqueChemDatatype.txt Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), from the EcoSIM source, issue #109 EcoSIM declares trcSalt_solml_vr as "soil aqueous salt content micropre, [mol d-2]". RedistMod.F90 divides it by the micropore water volume VLWatMicP_vr to compute the electrical conductivity of the soil solution, so the stored value is an amount, not a concentration (issue #109). Soil aqueous salt content micropore mol/{grid} The molar amount of chemical tracers bound to soil exchange sites in a soil layer in the grid cell that can be readily displaced by other ions in soil solution. This parameter represents reversibly sorbed tracers controlling ion exchange processes and chemical mobility in soil-water systems. trcx_solml_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Exchangeable tracers mol/{grid} The mass of crystalline salt deposits formed within soil micropore spaces when solution concentrations exceed saturation limits. This parameter controls salt storage and release during wetting-drying cycles, affecting soil salinity and plant stress in arid and semi-arid environments. trcp_saltpml_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Salt precipitate in micropore g.m-3 Electrical conductivity (ECND) is a measure of a material's ability to conduct an electric current. In the context of soil science, electrical conductivity is used as a proxy for determining the salinity of the soil, which can affect plant growth and productivity. ElectricConductivity_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) This may be more of a concept. Measured electrical conductivity dS.m-1 The molar concentration measure of total dissolved ions in soil solution, quantifying the electrical charge contribution of all ionic species. This parameter affects ion activity coefficients, chemical reaction rates, and solute transport processes in soil-water systems. SolutesIonStrenth_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Solution ion strength mol.m-3 Solution ion concentration refers to the measurement of the amount of ions present in a solution. This parameter is an important aspect of earth systems modeling as it helps in understanding the chemical composition and behavior of various solutions, such as oceans, lakes, and rivers. Solution ion concentration is typically expressed in units of moles per liter (M), and it provides valuable information about the presence and abundance of different ions, which plays a significant role in determining the physical and chemical properties of the solution. SolutesIonConc_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Solution ion concentration mol.m-3 The molar amount of dissolved salt tracers in the macropore water of a soil layer in the grid cell. This parameter quantifies salt storage in large pore spaces and preferential flow pathways, controlling rapid salt transport and ecosystem salinity patterns during precipitation events. trcSalt_soHml_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSIM declares trcSalt_soHml_vr in [g /d2], but its transport copy trcSalt_soHml2_vr is declared [mol d-2], its macropore flux trcSalt_Flo2MacP_vr is [mol d-2 h-1], and RedistMod.F90 adds it to the molar trcSalt_solml_vr, so the amount is in moles (issue #109). Salt tracer in macropores mol/{grid} The mass transport rate of dissolved salt tracers moving through soil macropore systems in three-dimensional flow domains. This parameter quantifies preferential salt transport through large pore networks, essential for understanding rapid contaminant movement and groundwater quality impacts. trcSalt_TransptMacP_3D AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Salt tracer transport thru macropores g.h-1/{grid} The movement of salt tracers through small pore spaces in soil or sediment that are typically less than 30 micrometers in diameter and filled with relatively immobile water. This transport process is important for understanding solute movement in low-permeability zones, contaminant fate and transport, and the connectivity between different porosity domains in subsurface hydrological systems. trcSalt_TransptMicP_3D AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Salt tracer transport thru micropores g.h-1/{grid} The total count of individual ions produced when a salt compound completely dissociates in aqueous solution, indicating the ionic strength contribution of the dissolved salt. This parameter is fundamental for calculating solution conductivity, osmotic pressure, and chemical activity coefficients in groundwater, surface water, and soil solution chemistry applications. trcSaltIonNumber AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Number of ions when the salt is fully dissociated 1 Total DOC micropore-macropore transfer refers to the total amount of dissolved organic carbon (DOC) that is transferred from the micropores to the macropores in the soil. This process plays a crucial role in soil carbon cycling and turnover, influencing soil fertility and ecosystem productivity. The amount of DOC transferred can be influenced by factors such as soil texture, organic matter content, and microbial activity. DOM_Mac2MicPore_flx_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total dissolved organic carbon micropore-macropore transfer g.h-1/{grid} The total flux of dissolved substances other than salts moving from small micropore spaces to larger macropore spaces in soil or sediment systems. This transfer process affects solute transport rates, contaminant mobility, and nutrient availability by controlling the exchange between slow-moving and fast-moving water domains in structured porous media. trcs_Mac2MicPore_flx_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Total non-salt solute micropore to macropore transfer g.h-1/{grid} Total salt micropore-macropore transfer refers to the movement or exchange of salt between the micropores and macropores in a system, excluding any specific band or direction of transfer. Micropores refer to very small-sized pores or channels within the system, while macropores indicate larger-sized pores or channels. The transfer of salt between these two types of pores influences the overall salt distribution and transport within the system being modeled. trcSalt_Mac2MicPore_flx_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total salt micropore-macropore transfer non-band g.h-1/{grid} Total solute NH4 transformation non-band refers to the total amount of transformation of ammonium (NH4) solute in a non-banded or uniform manner across a particular environment or medium. This typically includes processes like nitrification, volatilization, immobilization, mineralization, uptake by crops, and leaching. These processes are driven by multiple factors including temperature, soil moisture, and the presence of microorganisms. trcn_GeoChem_soil_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total solute ammonium transformation non-band mol.h-1/{grid} Total solute NH3 transformation (non-band) refers to the total change in the form or properties of ammonium (NH3) dissolved in a solution, not limited to a specific band or section of land. This includes processes like mineralization (conversion to mineral form), nitrification (conversion to nitrate), and immobilization (conversion to organic nitrogen compounds). The measurement helps in understanding nitrogen cycling in ecosystems. TRChem_sol_NH3_soil_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total solute ammonia transformation non-band mol.h-1/{grid} The total rate of chemical transformation of dissolved nutrients within a specific soil zone or treatment band, representing the net change in nutrient speciation or concentration. This parameter quantifies biogeochemical processes such as nitrification, denitrification, or phosphorus sorption that affect nutrient availability and mobility in managed agricultural or engineered soil systems. trcn_RChem_band_soil_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Total solute nutrient transformation band mol.h-1/{grid} Total salt solute transformation non-band refers to the process of converting soluble salts in a non-band environment. This transformation occurs through chemical reactions, such as dissolution, precipitation, adsorption, and desorption, that occur outside of specific bands or zones. It accounts for the overall change in the concentration of dissolved salts in the system, excluding any changes that occur within distinct bands or localized areas. trcSalt_RGeoChem_flx_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total salt solute transformation non-band mol.h-1/{grid} Total solute HCO3 transformation refers to the total transformation of bicarbonate (HCO3) solute in a given system. This transformation can occur through various processes, such as dissolution, precipitation, or biological uptake. Understanding this transformation is crucial as HCO3 plays a significant role in maintaining pH balance in aquatic environments, influencing the ability of water bodies to buffer against acidity. TRChem_HCO3_col AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total solute bicarbonate transformation mol.h-1/{grid} Total solute CO2 transformation refers to the total alteration or conversion of solute CO2, which indicates CO2 dissolved in a solvent, in a particular system or environment over time. It's a key parameter in understanding the carbon cycle and the impact of CO2 fluxes. TProd_CO2_geochem_soil_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total solute carbon dioxide transformation mol.h-1/{grid} Total solute H2O transformation refers to the total change in the form, structure, or composition of dissolved substances in water (H2O). It is a comprehensive measure that includes all the processes that can transform solutes in water, including biological activity (e.g., microbial degradation, plant uptake), chemical reactions (e.g., oxidation, reduction), and physical processes (e.g., sorption, volatilization). This parameter is crucial in earth systems modeling, as it determines the fate and transport of solutes in aquatic environments. TRChem_H2O_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total solute water transformation mol.h-1/{grid} Net rate at which dissolved iron(III) trihydroxide, Fe(OH)3(aq), is produced in a soil layer by the equilibrium reactions of the geochemical solver, with solid Fe(OH)3, with Fe(OH)2(+) and Fe(OH)4(-), and with iron phosphate, per grid cell and hour. TRChem_FeO3H3_soil_vr AqueChemDatatype.txt At EcoSIM c5e0ae6 this array is allocated but never written. The solver computes the quantity as TRChem_FeO3H3_soil (SaltChemEquilibriaMod.F90) and passes it to the model through trcSalt_RGeoChem_flx_vr (BERVO:0001716). Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) Total solute iron(III) trihydroxide transformation mol.h-1/{grid} Total adsorbed H transformation refers to the total amount of hydrogen (H) that undergoes transformation while being adsorbed on the surface of a material. In environmental science, this process plays a crucial role in various processes such as nutrient adsorption, contaminant removal, and catalyst activity. TRChem_H_p_sorbed_soil_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total adsorbed hydrogen transformation mol.h-1/{grid} Total adsorbed Al transformation refers to the process of transforming aluminum in the soil by adsorption. This is a key process in the soil and plays a critical role in soil structure stabilization, nutrient cation supply, and buffering soil solution pH. TRChem_Al_sorbed_soil_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total adsorbed aluminum transformation mol.h-1/{grid} Total adsorbed Ca transformation refers to the total change or conversion of calcium (Ca) ions that are adsorbed or attached to the surface of a material, such as soil particles. This process plays a crucial role in the nutrient cycle in soils, influencing nutrient availability to plants and soil pH balance. TRChem_Ca_sorbed_soil_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total adsorbed calcium transformation mol.h-1/{grid} Total adsorbed Mg transformation refers to the total amount of magnesium that is adsorbed by the soil and is subsequently transformed, usually by microorganisms. It is an important parameter in soil chemistry and nutrient cycling as it could affect the availability of Magnesium, a key nutrient, for plant uptake. TRChem_Mg_sorbed_soil_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total adsorbed magnesium transformation mol.h-1/{grid} Total adsorbed Na transformation refers to the total transformation or changes in the adsorbed Sodium (Na) in the soil. Adsorbed sodium refers to Sodium ions that are attached to the surfaces of soil particles. This parameter is significant for understanding the sodium cycling and its availability in the soils. TRChem_Na_sorbed_soil_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total adsorbed sodium transformation mol.h-1/{grid} Total adsorbed K transformation refers to the total change in the amount of potassium (K) that is adsorbed onto the surfaces of solid particles, such as soil or sediments, over a certain period of time. This is an important aspect of nutrient cycling in terrestrial and aquatic environments. TRChem_K_sorbed_soil_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total adsorbed potassium transformation mol.h-1/{grid} Total adsorbed COOH transformation refers to the total change or conversion of adsorbed carboxyl groups (COOH) in a system. These groups often attach to surfaces and contribute to important processes in various environmental systems, including soil chemistry, water treatment, and atmospheric chemistry. TRChem_HCO3_sorbed_soil_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total adsorbed carboxyl groups transformation mol.h-1/{grid} Rate at which aluminum dihydroxide, Al(OH)2(+), is adsorbed onto soil surfaces in a soil layer, per grid cell and hour, as computed by the geochemical solver; the amount adsorbed is removed from the dissolved pool. TRChem_AlO2H2_sorbed_soil_vr AqueChemDatatype.txt Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) Total aluminum dihydroxide adsorption mol.h-1/{grid} Total solute KSO4 transformation refers to the total amount of transformation of solute potassium sulfate (KSO4) in the soil solution. This includes the processes of dissolution, precipitation, adsorption, desorption, and biological uptake, all of which modulate the potassium supply to plants and determine the fertility of the soil. Monitoring the transformation of KSO4 in soil solution can help understand nutrient cycling and soil fertility. TRChem_KSO4_soil_soil_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total solute potassium sulfate transformation mol.h-1/{grid} Rate at which dissolved iron is adsorbed onto soil surfaces in a soil layer, per grid cell and hour, as computed by the geochemical solver. TRChem_Fe_sorbed_soil_vr AqueChemDatatype.txt Definition source - Claude Opus 5.5 through Claude Code (Oct 8 2026), from EcoSIM AqueChemDatatype.F90 and GeochemAPI.F90 for issue #83 Total iron adsorption mol.h-1/{grid} Rate at which iron(III) dihydroxide, Fe(OH)2(+), is adsorbed onto soil surfaces in a soil layer, per grid cell and hour, as computed by the geochemical solver; the amount adsorbed is removed from the dissolved pool. TRChem_FeO2H2_sorbed_soil_vr AqueChemDatatype.txt Definition source - Claude Opus 5.5 through Claude Code (Oct 8 2026), from EcoSIM AqueChemDatatype.F90 and GeochemAPI.F90 for issue #83 Total iron(III) dihydroxide adsorption mol.h-1/{grid} Total adsorbed OH- transformation non-band refers to the overall quantity of hydroxide ions (OH-) that undergo transformation through adsorption (attachment to the surface) in a non-band region in a given Earth system. This parameter represents the cumulative amount of OH- transformations occurring outside specific band regions, such as oceanic areas with specific temperature, salinity, or other physical characteristics. It is a measure of the chemical reactions and exchanges involving OH- that take place within the Earth system, which can have implications for various biogeochemical processes. trcx_TRSoilChem_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total adsorbed hydroxide transformation non-band mol.h-1/{grid} The total rate of carbon dioxide transformation at interfaces or boundaries between different environmental compartments such as soil-atmosphere or water-sediment interfaces. This parameter quantifies carbon dioxide production or consumption processes that occur at critical zone boundaries and affects atmospheric carbon exchange and pH regulation in terrestrial and aquatic ecosystems. Txchem_CO2_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Total solute carbon dioxide transformation boundary mol.h-1/{grid} The total rate of ionic species transformation occurring at boundaries between different environmental phases or compartments, such as soil-water or sediment-water interfaces. This parameter captures chemical processes including precipitation, dissolution, and speciation changes that control ion mobility and bioavailability at critical interfaces in environmental systems. TBION_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Total solute ion transformation boundary mol.h-1/{grid} The total rate of ammonia gas transformation processes including volatilization from solution, dissolution into water, or chemical conversion to other nitrogen species. This parameter is crucial for understanding nitrogen losses from agricultural systems, atmospheric nitrogen deposition, and the cycling of reactive nitrogen between gaseous and dissolved phases in environmental systems. TRChem_gas_NH3_geochem_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Total gaseous ammonia transformation mol.h-1/{grid} The term 'total precipitated P containing transformation non-band' refers to the amount of phosphorus (P) that is transformed and then deposited onto the Earth's surface in forms other than bands within a specified time period. This parameter is a component of earth system models and is used to quantify and simulate the cycling and distribution of phosphorus in terrestrial and aquatic ecosystems. It provides valuable information for understanding nutrient dynamics and their impact on ecosystem health and functioning. trcp_RChem_soil_vr AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Total precipitated phosphorus containing transformation non-band mol.h-1/{grid} The accumulated error in mass balance calculations for volatile tracer compounds that can partition between liquid and gas phases in environmental systems. This parameter quantifies uncertainty in tracer transport models and helps assess the reliability of contaminant fate and transport predictions in systems where volatilization represents a significant loss pathway. trcg_mass_cumerr_col AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Cumulative volatile tracer error g/{grid} The volumetric rate of water entering a model grid cell or computational unit as a result of surface runoff from surrounding areas or upstream locations. This flux represents lateral water movement that affects local water balance, soil moisture conditions, and hydrological connectivity between landscape units in watershed and catchment-scale hydrological modeling applications. TXGridSurfRunoff_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Water flux into the grid due to runoff m3.h-1/{grid} The rate of thermal energy transfer into a model grid cell or computational unit carried by surface runoff water from surrounding areas. This heat flux affects local soil temperature, energy balance, and thermal processes by transporting sensible heat through lateral water movement, which is important for modeling temperature dynamics in hydrologically connected landscape systems. THeatXGridBySurfRunoff_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Heat flux into the grid due to runoff MJ.h-1/{grid} A numerical identifier that specifies the lowest computational layer or depth level in a layered environmental model, typically representing the bottom boundary of a soil profile or water column. This identifier is used in multi-layered modeling frameworks to define vertical domain boundaries and establish lower boundary conditions for heat, water, and solute transport calculations. iPondBotLev_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Don't know what this means SoilWaterDataType.txt Bottom level ID NA The volumetric fraction of air-filled pore space in soil, representing the proportion of total soil volume occupied by gas phase under current moisture conditions. This parameter controls gas exchange rates, root respiration, and microbial aerobic processes, and is fundamental for understanding soil aeration status and oxygen availability in terrestrial ecosystems. ThetaAir_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Air concentration m3.m-3 Soil air content refers to the volume or percentage of air space in a soil sample. It determines the amount of oxygen available to roots and soil organisms. Proper soil aeration is essential for the health of soil ecosystems, as it affects root growth, nutrient uptake by plants, and the activity of soil microorganisms. It is considered a key factor in soil health, productivity, and sustainability. Typically, a soil with an air content of about 50% is considered ideal for plant growth. More compacted soils have less air space and can become waterlogged, while lighter, sandy soils may have higher air space but less water and nutrient retention. VLsoiAirP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Soil air content m3/{grid} The volume of water present in soil expressed as a fraction of the total soil volume, representing the three-dimensional water storage capacity and current moisture status of soil systems. This fundamental parameter controls plant water availability, microbial activity, and biogeochemical processes, and is essential for understanding soil hydrology, irrigation management, and ecosystem water balance in terrestrial environments. SWC THETW_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) EcoSIM THETW_vr is a volume fraction of bulk soil. The ATS-EcoSIM coupling currently writes ATS saturation_liquid, a fraction of pore volume, into it; see Soil liquid water saturation. ODM2 variable name concept "Volumetric water content": Volume of liquid water relative to bulk volume. Used for example to quantify soil moisture. AmeriFlux FP-Standard base name: SWC. AmeriFlux reports it in percent. BADM reports this quantity under a stated condition as SOIL_TEX_WILT, SOIL_TEX_FIELD_CAP and SOIL_TEX_SAT, which are this term with Wilting point, Field capacity or Saturation in contexts, and as PFCURVE_SWC, a point on a water retention curve paired with PFCURVE_MP on Soil water potential. These codes are not synonyms because each is the quantity under a condition. SoilWaterDataType.txt Volumetric water content m3.m-3 The volume of ice present in soil expressed as a fraction of the total soil volume, representing the frozen water component that occupies pore spaces in cold climate soils. This parameter is crucial for understanding freeze-thaw processes, soil thermal dynamics, and hydrological changes in seasonally frozen soils and permafrost regions where ice content affects soil structure, water movement, and biogeochemical processes. THETI_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Volumetric ice content m3.m-3 The volume of mobile or readily moveable water in soil expressed as a fraction of total soil volume, representing the water fraction that can flow freely through soil pores under gravitational or pressure gradients. This parameter is important for understanding water transport processes, drainage capacity, and the portion of soil water that contributes to groundwater recharge, runoff generation, and solute transport in terrestrial hydrological systems. ThetaH2OZ_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Volumetric moblize water m3.m-3 The volume of mobile or moveable ice in soil expressed as a fraction of total soil volume, representing frozen water that can redistribute or flow under pressure gradients during freeze-thaw cycles. This parameter is important for understanding ice redistribution processes, frost heave mechanics, and seasonal changes in soil structure and hydrology in cold climate regions where mobile ice affects soil stability and water movement patterns. ThetaICEZ_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Volumetric mobile ice m3.m-3 The micropore water flux is the volume of water moving through the micropores in the soil per unit time. This can be influenced by various factors, including soil type, texture, precipitation, and evaporation rates among others. VLWatMicP1_vr VLWatMicP_vr ATS water_content on the subsurface domain is an extensive molar quantity per cell; the ATS-EcoSIM coupling divides it by liquid water molar density and column area and writes the result into EcoSIM VLWatMicP1_vr, the intermediate time step copy of this variable. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Soil micropore water content m3/{grid} The volume of ice present within the smallest pore spaces of soil, typically less than 30 micrometers in diameter, representing frozen water trapped in fine soil pores during freezing processes. This parameter is crucial for understanding water and ice distribution in structured soils, controls soil thermal properties during freeze-thaw cycles, and affects microbial habitat and biogeochemical processes in seasonally frozen and permafrost soils. VLiceMicP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Soil micropore ice content m3/{grid} The volume of water present within the largest pore spaces of soil, typically greater than 75 micrometers in diameter, representing water in structural voids, root channels, and large inter-aggregate spaces. This parameter controls rapid water movement and drainage processes, affects root penetration and gas exchange, and is fundamental for understanding preferential flow, irrigation efficiency, and soil aeration in structured terrestrial soils. VLWatMacP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Soil macropore water content m3/{grid} The energy status or tension of water held within the smallest soil pores, representing the suction pressure required to extract water from micropore spaces typically less than 30 micrometers in diameter. This parameter controls plant water availability, microbial activity, and biogeochemical processes by determining how tightly water is bound to soil particles and influences water movement, root water uptake, and soil water retention in fine-textured soils. PSISM1_vr PSISoilMatricP_vr matric_pressure ATS: matric_pressure [Pa]. In the ATS-EcoSIM coupling the ATS capillary pressure is converted to MPa and written into EcoSIM PSISM1_vr, the intermediate time step copy of this variable. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Soil micropore matric water potential MPa Pa The combined water potential of micropore water that has been corrected for gravitational effects due to elevation differences, representing the total energy status of water in fine soil pores. This elevation-adjusted parameter is essential for understanding water movement across topographically variable landscapes, enables accurate modeling of water flow between different elevations, and controls plant water availability and biogeochemical processes in sloped terrain and mountainous environments. ElvAdjstedSoilH2OPSIMPa_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Elevation adjusted total soil micropore total water potential MPa The volume of water present in micropore spaces prior to the arrival of an advancing wetting front during infiltration events, representing the initial moisture condition in fine soil pores. This parameter is crucial for modeling infiltration processes, understanding preferential flow pathways, and predicting how initial soil moisture conditions affect water penetration, solute transport, and runoff generation during precipitation and irrigation events. VLWatMicPX_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Soil micropore water content before wetting front m3/{grid} Soil macropore - micropore water transfer refers to the process of movement of water within the soil between the larger pores or cavities (macropores) and the smaller ones (micropores). This is an important aspect of the soil's hydrological behavior, affecting the soil's water-holding capacity, water availability for plant uptake, and the leaching of nutrients and contaminants. The rate of this transfer can be influenced by factors such as soil texture, structure, organic matter content, and external conditions such as precipitation and evaporation. FWatExMacP2MicP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Soil macropore - micropore water transfer m3.h-1/{grid} The volume of ice present within large pore spaces (macropores) in frozen soils, representing frozen water that occupies the larger structural voids and root channels. This parameter affects soil hydraulic properties during freeze-thaw cycles and controls water movement and availability in seasonally frozen soils and permafrost regions. VLiceMacP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Soil macropore ice content m3/{grid} Macropore water flux refers to the rate at which water moves through the large pores within the soil structure. Macropores, typically greater than 0.05mm in diameter, play a crucial role in soil hydrology, influencing water infiltration, storage, and redistribution within the soil. The macropore water flux can be influenced by factors such as soil type, texture, structure, and organic matter content, as well as external conditions such as precipitation, temperature, and evaporation rates. VLWatMacPM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Soil macropore water flux m3/{grid} Soil water film thickness refers to the thickness of a layer of water that coats soil particles. This water film allows for the movement and availability of nutrients and is crucial for plant absorption and root functions. The thickness can vary depending on soil type, rainfall, and other environmental conditions. FILMM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Soil water film thickness m WaterTBLSlope refers to the angle of the water table in relation to the surface slope. It is an important measurement in hydrology as it can significantly impact the flow of groundwater, the saturation of soils, and ultimately the distribution of water in a landscape. WaterTBLSlope_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Slope of water table relative to surface slope 1 The vertical distance from the soil surface to an artificially maintained groundwater level created by subsurface drainage systems, irrigation, or water management practices. This parameter is important for understanding hydrological modifications in agricultural landscapes and affects root zone hydrology, soil chemistry, and crop productivity in managed water table systems. WtblDepzTile_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Depth of artificial water table m Artificial water table depth refers to the depth at which the water table is artificially maintained through human intervention, often for purposes such as irrigation, drainage, or preventing land subsidence. This is typically done in areas where natural water table levels are unsuitable for the intended land use. TileWaterTable_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Artificial water table depth m The vertical distance to an artificially maintained groundwater level that has been corrected for local topographic elevation differences, ensuring consistent measurement reference across variable terrain. This elevation-adjusted parameter is essential for regional water table mapping, drainage system design, and understanding groundwater flow patterns in managed agricultural watersheds with controlled water table systems. DTBLD_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Depth of artificial water table adjusted for elevation m The depth to groundwater level measured within a specific soil profile or model domain, representing the local saturation boundary that develops from internal hydrological processes. This parameter differs from regional water tables by reflecting local soil moisture dynamics, perched water conditions, and site-specific hydrological controls that affect root zone hydrology and soil biogeochemical processes. DepzIntWTBL_col surface-water_table_depth ATS: surface-water_table_depth [m], the water table diagnosed within the model column. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Internal water table depth m The starting depth to external groundwater level at the beginning of a modeling period or study, adjusted for local elevation to provide a consistent reference datum. This initial condition parameter is crucial for hydrological modeling and establishes baseline groundwater conditions for simulating water table fluctuations and their effects on soil moisture and plant water availability. ExtWaterTablet0_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Initial external water table depth, elevation corrected m The present depth to external groundwater level adjusted for local topographic elevation, with positive values indicating water table positions below the soil surface. This parameter tracks real-time groundwater conditions and is fundamental for understanding dynamic interactions between groundwater and surface processes, including capillary rise, root water uptake, and soil moisture regulation. ExtWaterTable_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Current external water table depth, elevation corrected (>0 lower than soil surface) m The vertical distance from the land surface to the natural or unmanaged groundwater level in the surrounding landscape or regional aquifer system. This parameter represents ambient groundwater conditions that influence local hydrology through lateral groundwater flow, capillary fringe effects, and baseflow contributions to surface water bodies in natural and semi-natural environments. NatWtblDepz_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt External water table depth m The cumulative kinetic energy delivered to soil surfaces by raindrop impact and surface flow that drives soil particle detachment and erosion processes. This parameter quantifies the erosive power of precipitation and runoff events and is fundamental for predicting soil loss rates, sediment transport capacity, and landscape evolution in erosion-prone environments. EnergyImpact4Erosion_colM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Total energy impact for erosion J.m-2 The combined volume of liquid water and ice that exceeds the storage capacity of soil pore spaces, representing the surplus frozen and unfrozen water available for drainage or runoff. This parameter is important for understanding hydrological processes in frozen soils and controls water movement, frost heave, and seasonal water balance in cold climate regions. XVLMobileWaterLitRM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Excess water+ice m3/{grid} The volume of liquid water that exceeds the water-holding capacity of soil, representing the surplus water available for drainage, runoff, or deep percolation beyond field capacity. This parameter controls leaching processes, groundwater recharge rates, and surface runoff generation, and is crucial for understanding water balance and solute transport in terrestrial ecosystems. XVLMobileWatMicPM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Excess water m3/{grid} The volume of ice that exceeds the ice-holding capacity of soil pore spaces, representing surplus frozen water that may contribute to frost heave, surface runoff, or drainage upon melting. This parameter is important for understanding freeze-thaw processes, soil structural changes, and hydrological dynamics in seasonally frozen soils and permafrost regions. XVLiceMicPM Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Excess ice m3/{grid} The ability of soil to transmit water through its pore network as a function of soil water content, describing how water movement capacity changes with soil moisture conditions. This relationship is fundamental for modeling unsaturated water flow, irrigation efficiency, and drainage processes, and controls the rate of water infiltration, redistribution, and plant water availability in terrestrial ecosystems. HydroCond_3D hydraulic_conductivity ATS: hydraulic_conductivity, evaluated in the EcoSIM PK from permeability, liquid density, and viscosity. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Hydraulic conductivity at different moisture levels m.MPa-1.h-1 Macropore hydraulic conductivity (HydroCondMacP) refers to the ability of the soil's macropores (pores that are greater than 0.08mm in diameter) to transmit water under the influence of a hydraulic gradient. It plays a crucial role in determining the rate and direction of water movement in the soil, and thus impacts soil water availability and nutrient mobility. HydroCondMacP_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Macropore hydraulic conductivity m.MPa-1.h-1 The capacity of soil micropores to conduct water specifically for plant root water absorption processes. This parameter controls water availability to plant roots, affecting transpiration rates and plant water stress responses in fine-textured soils with predominantly micropore networks. HydroCondMicP4RootUptake_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Soil micropore hydraulic conductivity for root water uptake m.MPa-1.h-1 The volumetric flow rate of surface water leaving a computational grid cell through runoff processes, constrained to non-negative values. This parameter represents water export from model grid cells, controlling downstream flow generation and spatial water redistribution in watershed modeling applications. SurfRunoffPotentM_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Runoff water flux out of grid m3/{grid}/{step} The speed of surface water movement during runoff events across terrestrial landscapes. This parameter controls runoff travel time, erosion potential, and flood wave propagation, affecting downstream hydrograph timing and peak flow characteristics in watershed systems. RunoffVelocityM_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Runoff velocity m/{step} A logical indicator controlling the activation of directional surface runoff calculations in two-dimensional hydrological models. This parameter manages computational efficiency by enabling or disabling complex flow routing algorithms based on topographic conditions and model requirements. IFLBM_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Remove? SoilWaterDataType.txt Flag for directional surface runoff NA A secondary logical indicator associated with directional runoff flag operations in two-dimensional flow models. This parameter works in conjunction with primary runoff flags to manage computational flow routing decisions and numerical stability in complex terrain simulations. IFLB_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Remove? SoilWaterDataType.txt Flag for directional runoff, related to IFLBM_2DH NA A dimensionless multiplier controlling the magnitude of subsurface water flux across the northern boundary of model domains. This parameter adjusts groundwater flow rates based on regional hydrogeological conditions and boundary condition specifications in hydrological modeling applications. RechrgDistNorthSubSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Scalar for northern subsurface boundary water flux 1 A dimensionless multiplier controlling the magnitude of subsurface water flux across the eastern boundary of model domains. This parameter adjusts groundwater flow rates based on regional hydrogeological conditions and boundary condition specifications in hydrological modeling applications. RechrgDistEastSubSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Scalar for eastern subsurface boundary water flux 1 A dimensionless multiplier controlling the magnitude of subsurface water flux across the southern boundary of model domains. This parameter adjusts groundwater flow rates based on regional hydrogeological conditions and boundary condition specifications in hydrological modeling applications. RechrgDistSouthSubSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Scalar for southern subsurface boundary water flux 1 A dimensionless multiplier controlling the magnitude of subsurface water flux across the western boundary of model domains. This parameter adjusts groundwater flow rates based on regional hydrogeological conditions and boundary condition specifications in hydrological modeling applications. RechrgDistWestSubSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Scalar for western subsurface boundary water flux 1 The time-dependent coefficient controlling the rate of subsurface water exchange across the northern boundary of water table models. This parameter determines the temporal response of groundwater flow to boundary conditions and regional hydrological forcing in northern model boundaries. RechargRateNorthWTBL_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Northern subsurface boundary water flux rate constant h-1 The time-dependent coefficient controlling the rate of subsurface water exchange across the eastern boundary of water table models. This parameter determines the temporal response of groundwater flow to boundary conditions and regional hydrological forcing in eastern model boundaries. RechargRateEastWTBL_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Eastern subsurface boundary water flux rate constant h-1 The time-dependent coefficient controlling the rate of subsurface water exchange across the southern boundary of water table models. This parameter determines the temporal response of groundwater flow to boundary conditions and regional hydrological forcing in southern model boundaries. RechargRateSouthWTBL_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Southern subsurface boundary water flux rate constant h-1 The time-dependent coefficient controlling the rate of subsurface water exchange across the western boundary of water table models. This parameter determines the temporal response of groundwater flow to boundary conditions and regional hydrological forcing in western model boundaries. RechargRateWestWTBL_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Western subsurface boundary water flux rate constant h-1 A dimensionless multiplier controlling the magnitude of surface water flux across the northern boundary of model domains. This parameter adjusts surface runoff and infiltration rates based on topographic conditions and boundary specifications in hydrological modeling applications. RechargNorthSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Scalar for northern surface boundary water flux 1 A dimensionless multiplier controlling the magnitude of surface water flux across the eastern boundary of model domains. This parameter adjusts surface runoff and infiltration rates based on topographic conditions and boundary specifications in hydrological modeling applications. RechargEastSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Scalar for eastern surface boundary water flux 1 A dimensionless multiplier controlling the magnitude of surface water flux across the southern boundary of model domains. This parameter adjusts surface runoff and infiltration rates based on topographic conditions and boundary specifications in hydrological modeling applications. RechargSouthSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Scalar for southern surface boundary water flux 1 A dimensionless multiplier controlling the magnitude of surface water flux across the western boundary of model domains. This parameter adjusts surface runoff and infiltration rates based on topographic conditions and boundary specifications in hydrological modeling applications. RechargWestSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Scalar for western surface boundary water flux 1 A dimensionless multiplier controlling the magnitude of subsurface water flux across the lower boundary of model domains. This parameter adjusts groundwater recharge and discharge rates based on hydrogeological conditions and boundary specifications in hydrological modeling applications. RechargBottom_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Scalar for lower subsurface boundary water flux 1 The volumetric flow rate of water through soil micropore systems in three-dimensional model domains. This parameter quantifies the movement of water through the smallest pore spaces in soil matrix, critical for understanding plant water availability and soil moisture dynamics. WaterFlow2MicPM_3D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Micropore water flux m3/{grid}/{step} The volumetric flow rate of water through soil macropore systems in three-dimensional model domains. This parameter quantifies the rapid movement of water through large pore spaces and cracks in soil, essential for understanding preferential flow and rapid infiltration processes. WaterFlow2MacPM_3D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Macropore water flux m3/{grid}/{step} The volumetric reduction in soil air space between successive model iterations, where positive values indicate air volume shrinkage. This parameter tracks dynamic changes in soil aeration during wetting and drying cycles, essential for understanding soil gas exchange and root respiration in environmental models. ReductVLsoiAirPM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Change in soil air volume for layer from last to current iteration, >0, shrink g.h-1/{grid} The volumetric flow rate of water from melting snow entering soil micropore systems. This parameter quantifies the infiltration of snowmelt into the smallest soil pore spaces, critical for understanding spring water recharge and soil moisture dynamics in cold regions. WatFlowSno2MicPM_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Meltwater flux into soil micropores m3.h-1/{grid} The volumetric flow rate of water from melting snow entering soil macropore systems. This parameter quantifies the rapid infiltration of snowmelt through large soil pores and preferential flow paths, essential for understanding spring flood generation and groundwater recharge in cold regions. WatFlowSno2MacPM_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Meltwater flux into soil macropores m3.h-1/{grid} The fraction of total soil pore space filled with air rather than water at any given time. This parameter quantifies soil aeration status and gas-filled porosity, critical for understanding root respiration, soil gas exchange, and anaerobic conditions in environmental modeling. FracAirFilledSoilPoreM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Air-filled soil porosity m3.m-3 The measure of path complexity for fluid flow through soil micropore networks, quantifying the deviation from straight-line flow paths. This parameter accounts for the winding nature of micropore connections and affects diffusion rates of water and solutes through fine soil pore systems in environmental models. TortMicPM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Soil micropore tortuosity m3.m-3 The measure of path complexity for fluid flow through soil macropore networks, quantifying the deviation from straight-line flow paths. This parameter accounts for the winding nature of macropore connections and affects rapid water movement and preferential flow through large soil pore systems in environmental models. TortMacPM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Soil macropore tortuosity m3.m-3 Coefficient for dissolution - volatilization represents the proportional rate at which a soluble compound dissolves into a solvent or volatilizes into the air. The rate can be influenced by temperature, surface area, the nature of the solvent and solute, and other factors. This parameter is used in modeling to understand the fate and transport of chemicals in various environmental compartments. DiffusivitySolutEffM_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Coefficient for dissolution - volatilization 1 The resistance to water flow through soil encountered by plant roots during water uptake processes. This parameter quantifies the impedance to root water absorption caused by soil texture, structure, and moisture conditions, essential for understanding plant water stress and root-soil water dynamics. SoilResit4RootPentrate_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Soil hydraulic resistance MPa.h.m-2 The water potential of soil when all pore spaces are completely filled with water, representing the upper limit of soil water energy status. This parameter defines the reference point for soil water potential measurements and is critical for understanding soil water retention characteristics and plant water availability. PSISE_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Soil water potential at saturation MPa The soil water potential at which air first enters the largest soil pores during drainage, marking the transition from saturated to unsaturated conditions. This parameter defines the critical threshold for soil aeration and is essential for understanding soil water retention curves and drainage processes. PSISoilAirEntry Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Soil water potential at air entry MPa The component of soil water potential arising from dissolved solutes in soil solution, representing the chemical energy contribution to total water potential. This parameter quantifies the effect of salt concentration on soil water availability to plants and microbial processes in environmental systems. PSISoilOsmotic_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Osmotic soil water potential MPa The component of soil water potential arising from gravitational forces acting on soil water at different elevations. This parameter quantifies the effect of gravity on water movement and energy status in soil profiles, essential for understanding vertical water flow and hydraulic gradients in environmental models. PSIGrav_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Gravimetric soil water potential MPa The volumetric water content remaining in soil after it has been dried to equilibrium with atmospheric humidity under standard laboratory conditions, representing tightly bound water. This parameter indicates the minimum water content achievable through air drying and is important for soil characterization, water retention studies, and understanding the hygroscopic properties of different soil types. SoilWatAirDry_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Air-dry water content m3.m-3 The volumetric water content present within the smallest pore spaces in soil, typically less than 30 micrometers in diameter, where water is held at high matric potentials. This water fraction is relatively immobile and represents the portion of soil water that is tightly held against gravitational drainage, affecting plant water availability and solute transport in structured soils. ThetaSat_vr Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Micropore class water content g/{grid} Unsaturated water flux refers to the movement of water through the unsaturated zone of the soil, which is the layer above the water table where some spaces within the soil structure are filled with air rather than water. It is an important process in hydrology and soil science as it influences soil moisture dynamics, nutrient transport, and groundwater recharge. WaterFlowSoiMicPX_3D Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Unsaturated water flux m3.h-1/{grid} The combined rate of water loss from soil and plant surfaces through evaporation and plant transpiration processes, representing the primary pathway for water return to the atmosphere in terrestrial ecosystems. This parameter integrates plant physiological processes with physical evaporation and is fundamental for water balance calculations, irrigation scheduling, and understanding ecosystem water use efficiency. AET EvapoTransp_col actual evapotranspiration Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Evapotranspiration m3.h-1/{grid} The accumulated volume of water that has flowed over the land surface during a specified time period, representing the total surface water yield from precipitation events. This parameter is essential for watershed management, flood prediction, and understanding the hydrological response of landscapes to precipitation patterns and land use changes. Qrunoff_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Cumulative total surface runoff m3/{grid} The total amount of water that soil can absorb from atmospheric water vapor under equilibrium conditions, representing the most tightly bound water fraction in soil. This parameter indicates soil clay content and organic matter composition, affects soil physical properties, and represents the water that remains unavailable to plants even under severe drought conditions. WatMass_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Total soil hygroscopic water content m3/{grid} The cumulative volume of water lost from soil through subsurface pathways including deep drainage, lateral seepage, and groundwater discharge over a specified time period. This parameter quantifies the component of water balance that represents water moving below the root zone and is crucial for understanding groundwater recharge, contaminant transport, and long-term water availability in terrestrial ecosystems. H2OLoss_CumYr_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Total subsurface water loss m3/{grid} Total water drainage below root zone, also known as deep percolation, is the process by which water moves down through the soil profile, below the root zone, and eventually reaches the groundwater system. This parameter is important in assessing water loss from the soil and its availability for plant use, as well as for estimating groundwater recharge and understanding nutrient leaching. QDrain_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Total water drainage below root zone m3/{grid} The volumetric flow rate of water running off the soil surface across model grid cells in two-dimensional horizontal domains. This parameter quantifies surface water movement between adjacent grid cells during rainfall and snowmelt events, essential for understanding lateral water redistribution in watershed modeling. XGridSurfRunoff_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Soil surface runoff water m3.h-1/{grid} The thermal energy transported by surface runoff water across model grid cells in two-dimensional horizontal domains. This parameter quantifies heat transfer through lateral water movement on soil surfaces, important for understanding temperature dynamics and energy balance in watershed thermal modeling. HeatXGridBySurfRunoff_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Soil surface runoff heat MJ.h-1/{grid} Runoff from surface water refers to the water that flows off the surface of the land - including fields, forest floors, city streets, and lawns, etc. - without sinking into the ground. It's a key component in the hydrological cycle, contributing significantly to the overall water resources in an area. Monitoring runoff is crucial for various environmental assessments and management practices, including flood forecasting, water supply planning, and water quality management. QRunSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Runoff from surface water m3.h-1/{grid} The volumetric flow rate of water leaving a system through outlets, channels, or drainage pathways. This parameter quantifies water outflow from watersheds, soil systems, or model domains, essential for understanding water balance and downstream flow contributions in hydrological modeling. QDischar_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) EcoSIM grid-cell total, in m3.h-1/{grid}. Water current (BERVO:0001837) is the generic volumetric flow, and carries ODM2's discharge. SoilWaterDataType.txt Water discharge m3.h-1/{grid} The volumetric flow rate of surface runoff calculated during the M-th iteration of numerical solution procedures in two-dimensional horizontal domains. This parameter represents intermediate runoff calculations during iterative model solution processes, important for convergence analysis and numerical stability in hydrological modeling. QflxSurfRunoffM_2DH Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Surface runoff in iteration M 1 The volumetric flow rate of water entering the soil surface from precipitation, irrigation, or surface water sources. This parameter quantifies the downward movement of water from the surface into soil pore spaces, fundamental for understanding soil water recharge and surface-subsurface water exchange processes. Qinflx2Soil_col surface-ecosim_water_source ATS: surface-ecosim_water_source [m s-1]; in the ATS-EcoSIM coupling, EcoSIM Qinflx2Soil_col divided by 3600 is returned to ATS as the surface water source. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Infiltration into soil m.s-1 m3.h-1/{grid} The total mass of water contained within the soil profile at the start of a simulation time interval. This parameter establishes initial soil water storage conditions for mass balance calculations, tracking changes in soil moisture throughout hydrological modeling periods. SoilWatMassBeg_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Soil water mass at the beginning of time step kg.m-2 The total mass of water contained within the soil profile at the end of a simulation time interval. This parameter reflects net changes from precipitation, evapotranspiration, and drainage, representing final soil water storage state for mass balance verification. SoilWatMassEnd_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Soil water mass at the end of time step kg.m-2 The volumetric flow rate of water entering soil from rainfall and surface irrigation applications. This parameter represents primary water input to soil systems, controlling soil moisture recharge, runoff generation, and groundwater infiltration in agricultural and natural ecosystems. Rain2Soil_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Water flow into soil due to precipitation (+ surface irrigation) m3{H2O}.h-1/{grid} The total volume of water deposited as dew on vegetation canopy surfaces over annual periods. This parameter represents atmospheric moisture input to ecosystems, affecting plant water balance and contributing to ecosystem water budgets in arid and semi-arid environments. QdewCanopy_CumYr_pft Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Cumulative dew deposition on canopy m3/{grid} The volumetric flow rate of liquid water transfer from snowpack to underlying soil layers. This parameter controls snowmelt infiltration, affecting soil moisture recharge, groundwater contributions, and spring runoff generation in snow-dominated watersheds. QSnoWatXfer2Soil_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Snow water flux to soil m3.h-1/{grid} The volumetric flow rate of ice transfer from snowpack to underlying soil layers during melting and refreezing processes. This parameter affects soil thermal dynamics, frost formation, and water storage in frozen soil layers of cold region ecosystems. QSnoIceXfer2Soil_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Snow ice flux to soil m3.h-1/{grid} The volumetric flow rate of water delivered from atmospheric sources to terrestrial land surfaces. This parameter represents total precipitation input controlling surface water balance, ecosystem water supply, and hydrological cycle components in terrestrial environments. PrecipAtm2LandSurf_col surface-precipitation_total ATS: surface-precipitation_total [m s-1], rain plus snow water equivalent, used when the EcoSIM PK lets EcoSIM partition precipitation itself. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Precipitation from atmosphere to land surface m.s-1 m3.h-1/{grid} The volumetric flow rate of precipitation that penetrates through vegetation canopy to reach the ground surface. This parameter represents effective precipitation after canopy interception, controlling soil water input and understory ecosystem water availability. RainPrecThrufall_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Precipitation through canopy m3{H2O}.h-1/{grid} The volumetric flow rate of liquid precipitation that falls onto existing snowpack surfaces. This parameter represents rain-on-snow events that can trigger rapid snowmelt, affecting snowpack energy balance and flood generation in snow-covered watersheds. RainPrec2Sno_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Rainfall to snow m3{H2O}.h-1/{grid} The volumetric flow rate of precipitation falling directly onto exposed land surfaces without vegetation or snow cover. This parameter controls surface runoff generation, soil erosion potential, and direct water input to bare soil areas in terrestrial ecosystems. Rain2ExposedSurf_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Rainfall to exposed surface m3{H2O}.h-1/{grid} The volumetric flow rate of subsurface water movement between adjacent computational grid cells in hydrological models. This parameter controls lateral water redistribution, groundwater flow patterns, and spatial connectivity of subsurface water systems. QWatIntLaterFlow_col Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) SoilWaterDataType.txt Internal lateral flow between grids m3{H2O}.h-1/{grid} The surface area occupied by a specific plant species or taxonomic group within a defined spatial extent. This parameter quantifies vegetation coverage patterns, controlling habitat availability, competitive interactions, and ecosystem spatial structure in ecological studies. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Use with BERVO:involves_taxa Area covered by specified plant m2/{grid} The proportion of total land area occupied by a specific plant species or taxonomic group expressed as a percentage. This parameter quantifies relative vegetation dominance, controlling species composition patterns and ecosystem functional diversity in plant community studies. SPP_O_PERC SPP_U_PERC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Use with BERVO:involves_taxa. AmeriFlux BADM variable names: SPP_O_PERC, SPP_U_PERC. AmeriFlux reports the cover of a species or vegetation type in the overstory and understory separately; the layer goes in contexts. Percent area covered by specified plant 1 The calendar date when a fire event occurred or was observed in terrestrial ecosystems. This parameter establishes temporal reference for fire disturbance effects, controlling burn history analysis and fire regime characterization in ecosystem management and research. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Date of fire NA The optical property of water indicating the degree of light scattering by suspended particles and dissolved substances. This parameter controls light penetration, aquatic productivity, and water quality assessment in freshwater and marine ecosystem studies. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) Turbidity of water {NTU} The volumetric flow rate and directional movement of water masses in aquatic environments. This parameter controls nutrient transport, sediment redistribution, and habitat conditions in rivers, lakes, and marine ecosystems. discharge Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 25 2025) ODM2 variable name concept "Discharge": Discharge. Water current m3.s-1 The rate at which argon molecules or atoms move through gaseous or aqueous media due to concentration gradients and molecular motion. This parameter is used as a conservative tracer for studying gas transport processes in terrestrial and aquatic systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Argon diffusivity m2.h-1 The rate at which carbon dioxide molecules move through gaseous or aqueous media due to concentration gradients and molecular transport processes. This parameter is fundamental for modeling carbon dioxide exchange between ecosystems and the atmosphere and carbon cycling in terrestrial and aquatic environments. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Carbon dioxide diffusivity m2.h-1 The rate at which methane molecules move through gaseous or aqueous media due to concentration gradients and molecular transport processes. This parameter is crucial for modeling methane production and emissions from terrestrial and aquatic ecosystems and understanding greenhouse gas dynamics in Earth system models. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Methane diffusivity m2.h-1 The rate at which oxygen molecules move through gaseous or aqueous media due to concentration gradients and molecular transport processes. This parameter is fundamental for modeling soil aeration dynamics and aerobic respiration processes in terrestrial and aquatic ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Oxygen diffusivity m2.h-1 The rate at which nitrogen gas molecules move through gaseous or aqueous media due to concentration gradients and molecular transport processes. This parameter is important for modeling nitrogen fixation and denitrification processes and nitrogen exchange between terrestrial ecosystems and the atmosphere. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Nitrogen diffusivity m2.h-1 The rate at which nitrous oxide molecules move through gaseous or aqueous media due to concentration gradients and molecular transport processes. This parameter is crucial for modeling greenhouse gas emissions from soils and understanding nitrous oxide dynamics in terrestrial and aquatic ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Nitrous oxide diffusivity m2.h-1 The rate at which ammonia molecules move through gaseous or aqueous media due to concentration gradients and molecular transport processes. This parameter is crucial for modeling ammonia emissions from fertilizers and nitrogen deposition processes in terrestrial and aquatic ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Ammonia diffusivity m2.h-1 The rate at which nitrate ions move through aqueous media due to concentration gradients and ionic mobility. This parameter governs nitrate transport in soil water and groundwater systems and is fundamental for modeling nitrogen cycling and groundwater contamination in agricultural and natural environments. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Necessary? Nitrate diffusivity m2.h-1 The rate at which phosphate ions move through aqueous media due to concentration gradients and ionic mobility. This parameter controls phosphate transport in soil water and surface waters and is critical for modeling phosphorus cycling and nutrient transport in terrestrial and aquatic ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Necessary? Phosphate diffusivity m2.h-1 Fraction of total leaf protein carbon that is protein bound to chlorophyll in the light-harvesting complexes. LeafProtein2Chl_pft leaf chlorophyll content Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), from the EcoSIM source EcoSIM holds this as LeafProtein2Chl_pft, read unchanged from the trait file's CHL and described as 'Fraction of total leaf protein as chlorophyll-bound for light-harvesting [-]'. StomatesMod.F90 multiplies leaf protein carbon by it and divides by 3.5 to get chlorophyll carbon, so the chlorophyll itself is about one part in 3.5 of this fraction. The same variable serves C3 and C4 plants. Leaf chlorophyll-bound protein fraction g{C_protein}.g-1{C_protein} Surface gas net flux g.h-1/{grid} A constant value concerning the passage of time. Time constant NA The radius of a plant's root or multiple roots. It is an important factor in plant growth and development, affecting the plant's ability to absorb water and nutrients from the soil. Root radius m A variable concerning measurements of plant growth as it corresponds to specific plant components. Growth yield variable NA The atomic mass of a specific element or isotope. Molar mass constant g.mol-1 The flow of water or other materials into streams, rivers, and groundwater as accumulated winter snow melts, particularly during warmer seasons. Snowpack runoff m3.h-1/{grid} The transfer of thermal energy between the atmosphere and land surface entities including ground surface and vegetation through conduction and convection. Ecosystem heat flux MJ.h-1/{grid} The nitrogen to carbon mass ratio in plant tissues. Plant nitrogen to carbon ratio g.g-1 The phosphorus to carbon mass ratio in plant tissues. Plant phosphorus to carbon ratio g.g-1 A variable concerning measurements of properties of water used for irrigation systems. Irrigation water variable NA The mass of water present in soil expressed relative to the mass of dry soil, commonly determined by weighing a moist soil sample, drying it to constant mass, and dividing the lost water mass by the dry soil mass. gravimetric soil water content soil gravimetric water content Definition source - Codex CLI (Jun 4 2026) via John-Marc Chandonia in PR #34 Gravimetric water content g.g-1 Temperature of the interface between the land surface and the overlying air, the radiating and conducting surface itself rather than the air above it or the soil beneath it. surface-temperature ATS: surface-temperature [K], the surface skin temperature used by the surface energy balance. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Surface skin temperature K Vertical depth of liquid water stored on the land surface above the soil, whether in depressions and puddles or as a continuous sheet of overland flow. surface-ponded_depth ATS: surface-ponded_depth [m]. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Ponded water depth m Depth from the land surface to the lower boundary of the ground that is thawed at a given moment, as distinct from the maximum seasonal thaw that defines the active layer. surface-thaw_depth ATS: surface-thaw_depth [m], from the thaw depth column integrator. Instantaneous, so not an exact synonym of Active layer depth of a permafrost soil, which is the seasonal maximum. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Thaw depth m Soil temperature averaged over the depth of the currently thawed active layer above permafrost. surface-active_layer_average_temperature ATS: surface-active_layer_average_temperature [K], from the active layer column integrator. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Active layer mean temperature K Fraction of the water on the land surface that is liquid rather than ice, from zero for wholly frozen surface water to one for wholly liquid. surface-unfrozen_fraction ATS: surface-unfrozen_fraction [-]. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Surface water unfrozen fraction 1 Fraction of the soil pore volume occupied by liquid water. saturation_liquid ATS: saturation_liquid [-] on the subsurface domain. In the ATS-EcoSIM coupling this value is written into EcoSIM THETW_vr, which BERVO records as Volumetric water content, a fraction of bulk soil volume rather than of pore volume. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Soil liquid water saturation 1 Fraction of the soil pore volume occupied by ice. saturation_ice ATS: saturation_ice [-] on the subsurface domain. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Soil ice saturation 1 Fraction of the soil pore volume occupied by gas. saturation_gas ATS: saturation_gas [-] on the subsurface domain. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Soil gas saturation 1 Downward flux of shortwave solar radiation, direct and diffuse together, incident on the land surface per unit horizontal area. SW_IN surface-incoming_shortwave_radiation ATS: surface-incoming_shortwave_radiation [W m-2]. In the ATS-EcoSIM coupling this forcing is converted to MJ m-2 h-1 and written into EcoSIM RadSWGrnd_col, recorded in BERVO as Shortwave radiation incident on ground surface. ODM2 variable name concept "Radiation, incoming shortwave": Incoming Shortwave Radiation. ODM2 variable name concept "Global Radiation": Solar radiation, direct and diffuse, received from a solid angle of 2p steradians on a horizontal surface. Source: World Meteorological Organization, Meteoterm. ODM2 variable name concept "Radiation, total shortwave": Total Shortwave Radiation. AmeriFlux FP-Standard base name: SW_IN. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Incoming shortwave radiation W.m-2 Resistance of the soil surface to the transfer of water vapor from soil pores to the air above, which holds evaporation below its potential rate as the surface dries. surface-rsoil surface-soil_resistance ATS: surface-rsoil and surface-soil_resistance [s m-1], the soil resistance of the top cells in the surface energy balance. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Soil surface resistance to vapor transfer s.m-1 Vertical range of land surface elevation over horizontal distances smaller than a model grid cell, giving the depth of the depressions that fill before water ponds continuously across the surface. surface-microtopographic_relief ATS: surface-microtopographic_relief [m]. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Microtopographic relief m Rate of heat conduction through bulk soil per unit temperature gradient, integrating the solid, water, ice, and air phases present. thermal_conductivity ATS: thermal_conductivity [W m-1 K-1] on the subsurface domain. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Soil thermal conductivity W.m-1.K-1 Ratio of the effective permeability of soil to liquid water at its current saturation to the intrinsic permeability of the fully saturated soil, a dimensionless factor between zero and one. relative_permeability ATS: relative_permeability [-] on the subsurface domain. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Soil relative permeability 1 Difference between gas phase pressure and liquid water pressure in soil pores, arising from surface tension at the air-water interfaces, and equal in magnitude to the matric potential expressed as a pressure. capillary_pressure_gas_liq ATS: capillary_pressure_gas_liq [Pa] on the subsurface domain. In the ATS-EcoSIM coupling this field is converted to MPa and written into EcoSIM PSISM1_vr, the intermediate time step copy of Soil micropore matric water potential. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Soil capillary pressure Pa Depth of liquid water that would result from melting the entire snowpack over a unit area, combining its ice and liquid water content. snow-water_equivalent ATS: snow-water_equivalent [m]. Generic depth form; Water equivalent snowpack is the EcoSIM volume per grid cell and is a child of this term. ODM2 variable name concept "Snow water equivalent": The depth of water if a snow cover is completely melted, expressed in units of depth, on a corresponding horizontal surface area. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Snow water equivalent m Amount of snow intercepted and held on the foliage and branches of a plant canopy, expressed as a water volume in the grid cell. SnowOnCanopy_pft surface-canopy_snow ATS: surface-canopy_snow, one value per plant functional type. CanopyDataType.txt Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Canopy held snow content m3/{grid} Water vapor exchange between the air and the exposed surface of the top soil layer, where neither litter nor snow covers it, accumulated over the model hour. TEvapXAir2Toplay_col surface-evaporation_ground ATS: surface-evaporation_ground, written from EcoSIM TEvapXAir2Toplay_col in the ATS-EcoSIM coupling. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 SurfPhysData.F90 Bare ground evaporation m3{H2O}.h-1/{grid} Water vapor exchange between the air and the surface litter layer, accumulated over the model hour. TEvapXAir2LitR_col surface-evaporation_litter ATS: surface-evaporation_litter, written from EcoSIM TEvapXAir2LitR_col in the ATS-EcoSIM coupling. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 SurfPhysData.F90 Surface litter evaporation m3{H2O}.h-1/{grid} Evaporation of liquid water from the surface of the snowpack to the atmosphere. EVAPW_col surface-evaporation_snow ATS: surface-evaporation_snow, written from EcoSIM EVAPW_col in the ATS-EcoSIM coupling. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 HydroThermData.F90 Snowpack evaporation m3{H2O}.h-1/{grid} Direct conversion of snowpack ice to water vapor lost to the atmosphere, without passing through the liquid phase. EVAPS_col surface-sublimation_snow ATS: surface-sublimation_snow, written from EcoSIM EVAPS_col in the ATS-EcoSIM coupling. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 HydroThermData.F90 Snowpack sublimation m3{H2O}.h-1/{grid} One-sided green leaf area of a plant canopy per unit horizontal ground area. LAI surface-LAI tlai_day_pft ATS: surface-LAI [m2 m-2]. In the ATS-EcoSIM coupling it is written into EcoSIM tlai_day_pft, the daily leaf area index of the prescribed phenology, divided evenly among the active plant functional types. ODM2 variable name concept "Leaf area index (LAI)": Leaf area index (LAI) is a dimensionless quantity that characterizes plant canopies. It is defined as the one-sided green leaf area per unit ground surface area (LAI = leaf area / ground area, m2 / m2) in broadleaf canopies. AmeriFlux BADM variable name: LAI. Legacy BADM variables mapped here, with the variant in contexts or qualifiers: LAI_TOT, LAI_O_DEC, LAI_O_EVG, LAI_U. AmeriFlux's LAI_CANOPY_TYPE (Total, Overstory, Understory) and the leaf habit go in contexts. LAI_TYPE PAI is Plant area index (BERVO:0001890) and GAI is Green area index. AmeriFlux BADM LAI_TYPE value: LAI. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 PlantTraitDataType.txt Canopy leaf area index m2.m-2 Projected area of the stems and branches of a plant canopy per unit horizontal ground area. surface-SAI tsai_day_pft ATS: surface-SAI [m2 m-2]. In the ATS-EcoSIM coupling it is written into EcoSIM tsai_day_pft, the daily stem area index of the prescribed phenology, divided evenly among the active plant functional types. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 PlantTraitDataType.txt Canopy stem area index m2.m-2 Amount of substance of liquid water per unit volume, equal to its mass density divided by the molar mass of water. molar_density_liquid ATS: molar_density_liquid [mol m-3] on the subsurface domain, used in the ATS-EcoSIM coupling to convert the molar water content of a cell to a water volume. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Liquid water molar density mol.m-3 Mass of the solid mineral and organic particles of soil per unit volume of the particles themselves, excluding pore space; with porosity it gives bulk density. density_rock ATS: density_rock [kg m-3] on the subsurface domain. In the ATS-EcoSIM coupling, bulk density is computed from it as particle density times one minus porosity. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Soil particle density kg.m-3 Fraction of a horizontal ground area covered by the vertical projection of vegetation, without regard to the taxa that compose it. FVC vegetation cover fraction fractional cover CHESS: Vegetation_Cover, Cover_Percent, FractionalCover. Percent area covered by specified plant (BERVO:0001834) is the per-taxon form. Unvegetated cover (BERVO:0001975) is its complement: the two sum to 1. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Fractional vegetation cover 1 Diameter of a plant stem measured perpendicular to its axis at a stated height above the ground. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 General form; Stem diameter at breast height is the forest inventory convention. Stem diameter cm m Diameter of a tree stem measured over bark at breast height, by convention 1.3 m above the ground, or 1.37 m in the United States, on the uphill side of the tree. DBH diameter at breast height CHESS: Stem_DBH, DBH_1_CM, DBH_2_CM, DBH_Avg_CM. Allometric equations take this as their input for biomass and carbon stock. ODM2 variable name concept "Diameter at breast height (DBH)": Diameter at breast height, or DBH, is the standard for measuring trees. DBH refers to the tree diameter measured at 4.5 feet above the ground. AmeriFlux FP-Standard base name: DBH. AmeriFlux records it continuously with dendrometers. AmeriFlux BADM variable name: DBH. The BADM DBH group reports it per species and date. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Stem diameter at breast height cm Position of a tree crown in the canopy relative to its neighbours, classed by the light the crown receives, conventionally as dominant, codominant, intermediate, or suppressed. canopy position class crown position CHESS: Crown_Class, Canopy_Position. The Kraft crown classes. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Crown class NA Sum of the cross-sectional areas of tree stems at breast height per unit ground area. basal area BASAL_AREA CHESS: ba. Computed from Stem diameter at breast height. ODM2 variable name concept "Area, basal": Basal area is the area of a given section of land that is occupied by the cross-section of tree trunks and stems at the base. The term is used in forest management and forest ecology. AmeriFlux BADM variable name: BASAL_AREA. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Stand basal area m2.har-1 Number of stems per unit ground area, counted at or above a stated minimum size. stem density TREES_NUM tree density CHESS: density, abla_density, pien_density, pico_density, each a per-species stem density. Plant population (BERVO:0000725) counts individuals; a plant with several stems counts once there and once per stem here. AmeriFlux BADM variable name: TREES_NUM. AmeriFlux counts trees per hectare above a stated minimum diameter at breast height, and LIFESTAGE separates seedlings, saplings and mature trees. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Stem count per unit area har-1 m-2 Leaf area index retrieved from canopy gap fraction under the assumption that foliage is randomly distributed, uncorrected for clumping; the product of the true leaf area index and the clumping index. Le effective LAI CHESS: Le_2200, Le_FV2200, Le_WN. Divide by the Apparent clumping factor (BERVO:8000562) to recover Canopy leaf area index (BERVO:0001879). Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Effective leaf area index m2.m-2 One-sided area of all above-ground plant material, foliage and woody parts together, per unit horizontal ground area. PAI Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 What an optical canopy analyser measures before woody area is removed; the sum of Canopy leaf area index (BERVO:0001879) and Canopy stem area index (BERVO:0001880). No CHESS column reports it; it is here because it is what the instrument measures before the woody correction. AmeriFlux BADM LAI_TYPE value: PAI. Plant area index m2.m-2 Steady-state index of the tendency of a point on the land surface to accumulate water, the natural logarithm of the specific upslope contributing area divided by the tangent of the local slope. CTI TWI compound topographic index CHESS: twi. Beven and Kirkby (1979). ODM2 variable name concept "Topographic Wetness Index (TWI)": Topographic wetness index (TWI), also known as the compound topographic index (CTI), is a steady state wetness index. It is commonly used to quantify topographic control on hydrological processes. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Topographic wetness index 1 Difference between the elevation of a point and the mean elevation of a surrounding neighbourhood of stated radius, positive on ridges and negative in valleys. TPI CHESS: tpi. Weiss (2001). Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Topographic position index m Second derivative of land surface elevation, the rate at which slope changes across the surface, with profile, plan, and total curvature as its directional forms. surface curvature terrain curvature CHESS: curvature. The sign convention differs between GIS tools, so a dataset should state which sign is convex. ODM2 variable name concept "Curvature": Curvature of a DEM measures the shape or curvature of the slope. A part of a surface can be concave or convex; you can tell that by looking at the curvature value. The curvature is calculated by computing the second derivative of the surface. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Land surface curvature m-1 Index of the potential direct incident radiation a slope receives, computed from latitude, slope, and folded aspect so that southwest-facing slopes score highest. HLI CHESS: heat_load. McCune and Keon (2002). Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Heat load index 1 Aspect folded about a stated axis so that slopes facing the warmest direction take the largest value and slopes facing away from it take zero, removing the circularity of compass aspect. transformed aspect CHESS: folded_aspect_205, folded about the 205 degree axis as |180 - |aspect - 205||. Beers et al. (1966) fold about 45 degrees. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Folded aspect deg Amount by which potential evapotranspiration exceeds actual evapotranspiration over a period, the evaporative demand a site could not meet from the water available to it. CWD CHESS: cwd. Stephenson (1998). Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Climatic water deficit mm Depth of precipitation received at a site over a year, averaged across a stated run of years. MAP CHESS: mean annual precipitation. AmeriFlux BADM variable name: MAP. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Mean annual precipitation mm Rate at which water can enter the soil through its surface under an unlimited supply of water at the surface, a property of the soil measured as a depth of water per unit time with an infiltrometer. infiltration capacity infiltration rate CHESS: infiltrations. A capacity of the soil, distinct from Infiltration into soil (BERVO:0001821), which is the water flux actually entering the soil under the supply present. Falls toward Soil vertical saturated hydraulic conductivity (BERVO:0001501) as the profile wets. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Soil infiltration rate mm.h-1 Mass of carbon held in the living microbial biomass of a soil per unit soil mass, commonly determined by chloroform fumigation and extraction. MBC microbial biomass C CHESS: microbial biomass carbon. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Soil microbial biomass carbon mg{C}.kg-1 Mass of nitrogen held in the living microbial biomass of a soil per unit soil mass, commonly determined by chloroform fumigation and extraction. MBN microbial biomass N CHESS: microbial biomass nitrogen. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Soil microbial biomass nitrogen mg{N}.kg-1 Concentration of nitrite ions in soil, the intermediate of nitrification and denitrification, per unit mass of soil. CHESS: nitrite_nitrogen. Sibling of Soil ammonium content (BERVO:0000856) and Soil nitrate content (BERVO:0000857). Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Soil nitrite content mg.kg-1 Mass of manganese per unit mass of soil, as total or extractable manganese according to the method stated. CHESS: manganese. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Soil manganese content mg{Mn}.kg-1 Mass of zinc per unit mass of soil, as total or extractable zinc according to the method stated. CHESS: zinc. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Soil zinc content mg{Zn}.kg-1 Amount of lime, as calcium carbonate equivalent, required to raise the pH of a unit mass of soil by one unit, a measure of the resistance of the soil to change in pH. LBC lime buffer capacity CHESS: lime buffer capacity. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), CHESS gap analysis for issue #29 Soil lime buffer capacity mg{CaCO3}.kg-1/{pH} Fraction of the sky obscured by cloud, as seen from a point on the surface. cloud amount cloudiness Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Cloud cover": Cloud cover (also known as cloudiness, cloudage, or cloud amount) refers to the fraction of the sky obscured by clouds when observed from a particular location. Cloud cover 1 Velocity scale of turbulent momentum transfer near a surface, the square root of the surface shear stress divided by air density. USTAR shear velocity u* Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Friction velocity": Friction velocity. AmeriFlux FP-Standard base name: USTAR. Friction velocity m.s-1 Depth of hail that falls on a horizontal surface over a period. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 Hail depth mm Depth of liquid water equivalent of the precipitation that falls on a horizontal surface over a period. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Precipitation": Precipitation such as rainfall. Should not be confused with settling. AmeriFlux FP-Standard base name: P. The code is not recorded as a synonym because it is also the label, symbol or synonym of another BERVO term. Precipitation amount mm Depth of rain that falls on a horizontal surface per unit time, the intensity of rainfall. rainfall intensity Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Rainfall rate": A measure of the intensity of rainfall, calculated as the depth of water to fall over a given time period if the intensity were to remain constant over that time interval (in/hr, mm/hr, etc) Rainfall rate mm.h-1 Ratio of the partial pressure of water vapor in air to the saturation vapor pressure at the same temperature, expressed as a fraction. RH Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Relative humidity": Relative humidity. AmeriFlux FP-Standard base name: RH. AmeriFlux reports it in percent. Air relative humidity 1 Length of time in a period during which direct normal solar irradiance exceeds 120 W m-2, the threshold the World Meteorological Organization sets for bright sunshine. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66; threshold from the WMO Guide to Instruments and Methods of Observation (WMO-No. 8) ODM2 variable name concept "Sunshine duration": Sunshine duration Sunshine duration h Temperature to which air must be cooled, at constant pressure and water vapor content, to reach saturation. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Temperature, dew point": Dew point temperature Dewpoint temperature Cel Difference between the saturation vapor pressure and the actual vapor pressure of air at the same temperature. VPD Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Vapor pressure deficit": The difference between the actual water vapor pressure and the saturation of water vapor pressure at a particular temperature. AmeriFlux FP-Standard base name: VPD. AmeriFlux reports it in hPa. Vapor pressure deficit kPa Greatest distance at which a dark object can be seen and recognized against the horizon sky in daylight. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Visibility": Visibility Visibility m Mass of water vapor per unit volume of air. absolute humidity Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Water vapor density": Water vapor density Water vapor density g.m-3 Direction from which the wind blows near the surface, measured clockwise from true north. WD Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Wind direction": Wind direction. AmeriFlux FP-Standard base name: WD. AmeriFlux reports the standard deviation within an averaging period as WD_SIGMA (Yamartino, 1984); BERVO expresses it with the Standard deviation qualifier rather than a separate term. Near-surface wind direction deg Direction from which the strongest short-lived wind of a period blows, measured clockwise from true north. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Wind gust direction": Direction of gusts of wind Wind gust direction deg Highest short-lived wind speed in a period, usually a peak lasting a few seconds. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Wind gust speed": Speed of gusts of wind Wind gust speed m.s-1 Distance the air travels past a point over a period, the product of the mean wind speed and the length of the period. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Wind Run": The length of flow of air past a point over a time interval. Windspeed times the interval of time. Wind run m Categorical record of the state of the weather at an observation time, such as clear, rain, snow, or fog. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Weather conditions": Weather conditions Weather conditions NA Apparent temperature that combines air temperature and relative humidity to express how hot the air feels to people. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Heat index": The combination effect of heat and humidity on the temperature felt by people. Heat index Cel Apparent temperature that combines air temperature, humidity, solar radiation, and wind speed to express how hot or cold conditions feel to people. THSW index Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "THSW Index": The THSW Index uses temperature, humidity, solar radiation, and wind speed to calculate an apparent temperature. Temperature-humidity-sun-wind index Cel Apparent temperature that combines air temperature, humidity, and wind speed to express how hot or cold conditions feel to people. THW index Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "THW Index": The THW Index uses temperature, humidity, and wind speed to calculate an apparent temperature. Temperature-humidity-wind index Cel Dimensionless measure of erythemally weighted solar ultraviolet irradiance at the surface, scaled so that one unit equals 25 mW m-2. ultraviolet index Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Ultraviolet Radation Index": The global solar UV index (UVI) was developed as an easy-to-understand measure of biologically effective UV radiation with a view to promote public awareness of the risks of UV radiation exposure and sun protection. In the initial work done on UVI in Canada, a typical midday summer erythemal irradiance of 250 mW.m-2 was found leading to the (arbitrary) definition of one UV index equal to an erythemally weighted irradiance of 25 mW.m-2. This gives a typical range of UVI 0 to 11+. UV index 1 Erythemally weighted ultraviolet radiant exposure accumulated over a period. erythemal dose Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Ultraviolet Radiation Dose": A measure of the ability of ultraviolet radiation, as a function of wavelength, to produce just perceptible erythema in human skin. Ultraviolet radiation dose J.m-2 Apparent temperature that combines air temperature and wind speed to express how cold the air feels on exposed skin. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Wind chill": The effect of wind on the temperature felt on human skin. Wind chill Cel Number of photons in the 400 to 700 nm waveband incident on a surface per unit area and time. PPFD PPFD_IN Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Photosynthetic photon flux density (PPFD)": The number of photons per unit time and per unit area in the wavelength band 400 to 700 nm. AmeriFlux FP-Standard base name: PPFD_IN. Photosynthetic photon flux density umol.m-2.s-1 Radiant flux density of all wavelengths arriving at a surface from above. total incoming radiation Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Radiation, incoming": Incoming radiation. ODM2 variable name concept "Radiation, total incoming": Total amount of incoming radiation from all frequencies Incoming radiation W.m-2 Radiation in the 400 to 700 nm waveband arriving at a surface from above. incoming PAR Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Radiation, incoming PAR": Incoming Photosynthetically-Active Radiation Incoming photosynthetically active radiation W.m-2 umol.m-2.s-1 Radiant flux density in the 315 to 400 nm waveband arriving at a surface from above. incoming UV-A radiation R_UVA Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Radiation, incoming UV-A": Incoming Ultraviolet A Radiation. AmeriFlux FP-Standard base name: R_UVA. Incoming ultraviolet A radiation W.m-2 Radiant flux density in the 280 to 315 nm waveband arriving at a surface from above. incoming UV-B radiation R_UVB Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Radiation, incoming UV-B": Incoming Ultraviolet B Radiation. AmeriFlux FP-Standard base name: R_UVB. Incoming ultraviolet B radiation W.m-2 Radiation arriving at a surface minus radiation leaving it, over all wavelengths. NETRAD Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Radiation, net": Net Radiation. AmeriFlux FP-Standard base name: NETRAD. Net radiation W.m-2 Incoming minus outgoing longwave radiation at a surface. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Radiation, net longwave": Net Longwave Radiation Net longwave radiation W.m-2 Incoming minus outgoing radiation in the 400 to 700 nm waveband at a surface. net PAR Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Radiation, net PAR": Net Photosynthetically-Active Radiation Net photosynthetically active radiation W.m-2 umol.m-2.s-1 Incoming minus outgoing shortwave radiation at a surface. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Radiation, net shortwave": Net Shortwave radiation Net shortwave radiation W.m-2 Longwave radiation emitted and reflected upward by a surface. LW_OUT upwelling longwave radiation Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Radiation, outgoing longwave": Outgoing Longwave Radiation. AmeriFlux FP-Standard base name: LW_OUT. Outgoing longwave radiation W.m-2 Radiation in the 400 to 700 nm waveband reflected upward by a surface. outgoing PAR PPFD_OUT Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Radiation, outgoing PAR": Outgoing Photosynthetically-Active Radiation. AmeriFlux FP-Standard base name: PPFD_OUT. Outgoing photosynthetically active radiation W.m-2 umol.m-2.s-1 Shortwave radiation reflected upward by a surface. SW_OUT reflected shortwave radiation upwelling shortwave radiation Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Radiation, outgoing shortwave": Outgoing Shortwave Radiation. AmeriFlux FP-Standard base name: SW_OUT. Outgoing shortwave radiation W.m-2 Radiant flux density of all wavelengths leaving a surface upward. total outgoing radiation Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Radiation, total outgoing": Total amount of outgoing radiation from all frequencies Outgoing radiation W.m-2 Vertical turbulent transfer of horizontal momentum between the atmosphere and a surface, per unit area and time, equal to the tangential stress the moving air exerts on the surface. TAU wind stress Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Momentum flux": Momentum flux. ODM2 variable name concept "Wind stress": Drag or trangential force per unit area exerted on a surface by the adjacent layer of moving air. AmeriFlux FP-Standard base name: TAU. AmeriFlux reports it in kg m-1 s-2, equal to N m-2. Momentum flux N.m-2 Rate of transfer of ammonium across a surface, such as the sediment-water interface, per unit area and time. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Ammonium flux": Ammonium (NH4) flux Ammonium flux mmol.m-2.d-1 Net vertical transfer of carbon dioxide between a surface and the atmosphere, per unit area and time. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Carbon dioxide flux": Carbon dioxide (CO2) flux Carbon dioxide flux umol.m-2.s-1 Rate of change of the carbon dioxide stored in the air column below an eddy covariance sensor, per unit ground area. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Carbon dioxide storage flux": Carbon dioxide (CO2) storage flux. AmeriFlux FP-Standard base name: SC. The code is not recorded as a synonym because it is also the symbol or synonym of another BERVO term. Carbon dioxide storage flux umol.m-2.s-1 Flux of energy into the subsurface carried by effective precipitation and net primary production, which drives weathering and soil formation. EEMT Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Effective energy and mass transfer (EEMT)": Effective energy and mass transfer (EEMT) couples energy and mass flux to the subsurface in the form of effective precipitation and net primary production in a common energy unit. Effective energy and mass transfer MJ.m-2.a-1 Rate of water loss to the atmosphere by evaporation from soil, water, and wet surfaces, per unit area. evaporation rate Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Evaporation": Evaporation Evaporation flux mm.h-1 Rate of water loss to the atmosphere by evaporation and plant transpiration together, per unit area. ET evapotranspiration rate Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Evapotranspiration (ET)": Evapotranspiration (ET) is the sum of evaporation and plant transpiration from the Earth's land and ocean surface to the atmosphere. Evapotranspiration flux mm.h-1 Evapotranspiration that would occur from a surface with an unlimited water supply under the prevailing weather, per unit area. PET Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Evapotranspiration, potential": The amount of water that could be evaporated and transpired if there was sufficient water available. Potential evapotranspiration mm.d-1 Rate of water loss to the atmosphere through plant stomata, per unit ground area. transpiration rate Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Transpiration": Transpiration Transpiration flux mm.h-1 Rate of water movement across a surface, per unit area and time. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Water flux": Water Flux Water flux across a surface mm.h-1 Rate of water movement through the xylem of a plant stem, for one plant. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Sap flow": Movement of xylem sap in trees. Sap flux is not a synonym here: in the literature it names the per-area quantity, Sap flux density (BERVO:0002319). Sap flow kg.h-1/{plant} Rate of heat transfer by conduction into or out of the soil at the ground surface, per unit area. soil heat flux Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Ground heat flux": Ground heat flux. This is the flux at the ground surface. The flux measured at the depth of a soil heat flux plate, AmeriFlux G, is Soil heat flux at measurement depth (BERVO:0002257); the two differ by Soil heat storage flux (BERVO:0002256). Ground heat flux W.m-2 Rate of energy transfer from a surface to the atmosphere carried by evaporated water, per unit area. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Latent heat flux": Latent Heat Flux Latent heat flux W.m-2 Rate of heat transfer between a surface and the atmosphere by conduction and convection, per unit area. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Sensible heat flux": Sensible Heat Flux Sensible heat flux W.m-2 Outgoing minus incoming rate of heat transfer through a surface, per unit area. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Net heat flux": Outgoing rate of heat energy transfer minus the incoming rate of heat energy transfer through a given area Net heat flux W.m-2 Rate of transfer of oxygen across a surface, per unit area and time. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Oxygen flux": Oxygen (O2) flux Oxygen flux mmol.m-2.d-1 Rate at which oxygen is consumed by biological and chemical processes, per unit area. oxygen consumption Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Oxygen uptake": Consumption of oxygen by biological and/or chemical processes Oxygen uptake mmol.m-2.d-1 Rate of transfer of phosphate across a surface, per unit area and time. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Phosphorus, phosphate flux": Phosphate (PO4) flux Phosphate flux mmol.m-2.d-1 Rate of transfer of silicic acid across a surface, per unit area and time. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Silicic acid flux": Silicate acid (H4SiO4) flux Silicic acid flux mmol.m-2.d-1 Rate of transfer of urea across a surface, per unit area and time. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Urea flux": Urea ((NH2)2CO) flux Urea flux mmol.m-2.d-1 Rate at which primary producers fix carbon from carbon dioxide, per unit area. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Primary productivity": Primary Productivity Primary production rate g{C}.m-2.d-1 Rate at which primary producers fix carbon from carbon dioxide, per unit area, including the carbon they later respire. GPP Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Primary productivity, gross": Rate at which an ecosystem accumulates energy by fixation of sunlight, including that consumed by the ecosystem. AmeriFlux FP-Standard base name: GPP, reported in umol.m-2.s-1 of carbon dioxide. Gross primary production rate g{C}.m-2.d-1 umol{CO2}.m-2.s-1 Rate of carbon dioxide release by all the organisms of an ecosystem, per unit area. RECO Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Respiration, ecosystem": Gross carbon dioxide production by all organisms in an ecosystem. Ecosystem respiration is the sum of all respiration occurring by the living organisms in a specific ecosystem. AmeriFlux FP-Standard base name: RECO. Ecosystem respiration flux umol.m-2.s-1 Rate of carbon dioxide release by respiration less any concurrent uptake, per unit area. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Respiration, net": Net respiration Net respiration umol.m-2.s-1 Rate of carbon dioxide release from soil by roots and soil organisms, per unit area. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Soil respiration": Soil respiration refers to the production of carbon dioxide when soil organisms respire. This includes respiration of plant roots, the rhizosphere, microbes and fauna. Soil respiration umol.m-2.s-1 Largest diameter of the hailstones that fall at a point during a hail event. hail size Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 Hailstone size mm Height of the top of a plant canopy above the ground surface. HEIGHTC Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 ODM2 variable name concept "Canopy height": Forest canopy density and height are used as variables in a number of environmental applications, such as biomass estimation, vegetation coverage, and biodiversity determination. Canopy density, or canopy cover, is the ratio of vegetation to ground as seen from the air. Canopy height measures how far above the ground the top of the canopy is. Lidar can be used to determine both of these variables. AmeriFlux BADM variable name: HEIGHTC. Legacy BADM variables mapped here, with the variant in contexts or qualifiers: HEIGHTC_U. Understory canopy height is this term with Understory in contexts. Canopy height m Fraction of the sky hemisphere obscured by vegetation when viewed from a single point beneath the canopy. crown closure Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 ODM2 variable name concept "Canopy closure": Crown closure is a term used in forestry. Crown closure and crown cover are two slightly different measures of the forest canopy and that determine the amount of light able to penetrate to the forest floor. Canopy closure 1 Spectral vegetation index equal to the difference between near-infrared and red reflectance divided by their sum, (NIR - red) / (NIR + red), ranging from -1 to 1 and rising with the amount of green vegetation. NDVI Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 ODM2 variable name concept "NDVI": Normalized difference vegetation index. AmeriFlux FP-Standard base name: NDVI. Normalized difference vegetation index 1 Dry mass of plant material per unit ground area. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 ODM2 variable name concept "Biomass, vegetation": Total dry mass of plant material per unit area or volume. AmeriFlux BADM variable name: BIOMASS. The code is not recorded as a synonym because it is also the label, symbol or synonym of another BERVO term. Legacy BADM variables mapped here, with the variant in contexts or qualifiers: ROOT_BIOMASS_TOT, ROOT_BIOMASS_FINE, ROOT_BIOMASS_CRS, SNAG_MASS. The current BADM standard reports one BIOMASS value with BIOMASS_ORGAN, BIOMASS_STATUS and BIOMASS_VEGTYPE, which map to the plant organ, vegetation status and plant functional type concepts. Snags, dead trees still standing, are biomass with BIOMASS_STATUS Dead Standing, so SNAG_MASS maps here; stumps go to Litter and debris mass (BERVO:0002338). Vegetation biomass g.m-2 Dry mass of the living plant material above the ground surface, per unit ground area. above-ground biomass Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 ODM2 variable name concept "Biomass, above-ground": The biomass is the mass of living biological organisms in a given area or ecosystem at a given time on or above the surface of the ground. Legacy BADM variables mapped here, with the variant in contexts or qualifiers: AG_BIOMASS_TREE, AG_BIOMASS_SHRUB, AG_BIOMASS_GRASS, AG_BIOMASS_CROP, AG_BIOMASS_OTHER. The vegetation type goes in contexts. Aboveground biomass g.m-2 Fraction of a leaf surface covered by liquid water from dew, rain, or fog. LEAF_WET Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 ODM2 variable name concept "Leaf wetness": The effect of moisture settling on the surface of a leaf as a result of either condensation or rainfall. AmeriFlux FP-Standard base name: LEAF_WET. AmeriFlux reports it in percent. Leaf wetness 1 Categorical class of the vegetation of an area, such as forest, grassland, or salt marsh. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 ODM2 variable name concept "Vegetation type": Vegetation is an assemblage of plant species and the ground cover they provide. Vegetation type NA Depth of the precipitation that passes through gaps in a plant canopy or drips from it to the ground, over a period. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 ODM2 variable name concept "Throughfall": In Hydrology, throughfall is the process which describes how wet leaves shed excess water onto the ground surface. These drops have greater erosive power because they are heavier than rain drops. Furthermore, where there is a high canopy, falling drops may reach terminal velocity, about 8 metres (26 ft), thus maximizing the drop's erosive potential. AmeriFlux FP-Standard base name: THROUGHFALL. The code is not recorded as a synonym because it differs from the label only in case. Throughfall mm Fraction of a horizontal ground area not covered by the vertical projection of vegetation. bare ground cover Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 ODM2 variable name concept "No vegetation coverage": Areal coverage of no vegetation. It is the complement of Fractional vegetation cover (BERVO:0001883): the two sum to 1. Unvegetated cover 1 Fraction of a horizontal ground area covered by wrack. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 ODM2 variable name concept "Wrack coverage": Areal coverage of dead vegetation. Wrack cover 1 Mass of phytoplankton per unit volume of water. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 ODM2 variable name concept "Biomass, phytoplankton": Total mass of phytoplankton, per unit area or volume. Phytoplankton biomass g.m-3 Length of an organism's body between two defined points, which depend on the kind of organism. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 ODM2 variable name concept "Body length": Length of the body of an organism. Body length m Light re-emitted by chlorophyll after it absorbs light, used in water as an in situ proxy for chlorophyll concentration. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 ODM2 variable name concept "Chlorophyll fluorescence": Chlorophyll Fluorescence. Reported in relative fluorescence units, {RFU}, unless a sensor is calibrated to a concentration. Chlorophyll fluorescence {RFU} Number of individual organisms counted per unit area. areal count Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 ODM2 variable name concept "Count, areal": Counts per area. Organism count per unit area m-2 Number of fish identified by detection equipment, such as sonar or a tag reader. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 ODM2 variable name concept "Fish detections": The number of fish identified by the detection equipment. Fish detections 1 Diversity index computed from the number of taxa in a sample and the proportion of individuals in each. Shannon entropy Shannon index Shannon-Weaver diversity index Shannon-Wiener index Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 ODM2 variable name concept "Shannon diversity index": A diversity index that is based on the number of taxa, and the proportion of individuals in each taxa relative to the entire community, evaluated as entropy. Also known as Shannon-Weaver diversity index, the Shannon-Wiener index, the Shannon index and the Shannon entropy. Shannon diversity index 1 Shannon diversity index divided by its maximum possible value for the number of taxa present, ranging from 0 to 1. Pielou evenness index Shannon Weaver evenness index Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 ODM2 variable name concept "Shannon evenness index": A dimensionless diversity index, calculated as a ratio of the Shannon diversity index over its maximum. Also known as the Shannon Weaver evenness index. Shannon evenness index 1 Number of distinct taxa found in a sample or area. taxon richness Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 ODM2 variable name concept "Taxa count": Count of unique taxa. A taxon (plural: taxa) is a group of one (or more) populations of organism(s), which is judged to be a unit. Taxa count 1 Number of microbial cells per unit volume of a medium. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 Use with BERVO:involves_taxa to name the taxon counted. Microbial cell density {cells}.m-3 Number of microbial cells per unit volume of water. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 Microbial cell density in water {cells}.m-3 Number of colony-forming units of culturable microorganisms per unit volume of a medium, from plate or membrane-filter culture. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 Use with BERVO:involves_taxa to name the taxon cultured. A culture count and a direct cell count measure different things and are not interchangeable. Colony-forming unit density {CFU}.m-3 Number of colony-forming units of culturable microorganisms per unit volume of water, the usual basis for fecal indicator bacteria such as Escherichia coli. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 Colony-forming unit density in water {CFU}.m-3 Length of a fish's body, measured as total length (snout to the tip of the longest caudal fin ray), fork length (snout to the fork of the tail), or standard length (snout to the end of the last vertebra). fork length standard length total length Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 The value is one of the three measures, not all three. Which one was taken must be recorded with the data; they are not interchangeable, and the related synonyms name the three measures, not alternative names for one. Fish body length m Discharge of water in a stream or river channel past a point. stream discharge Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Streamflow": The volume of water flowing past a fixed point. Equivalent to discharge. Streamflow m3.s-1 Part of streamflow supplied by groundwater, rather than by recent precipitation or runoff. base flow Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Baseflow": The portion of streamflow (discharge) that is supplied by groundwater sources. Baseflow m3.s-1 Vertical distance from a water surface to the bottom of the water body at a point. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Water depth": Water depth is the distance between the water surface and the bottom of the water body at a specific location specified by the site location and offset. Water depth m Water depth averaged over a channel cross-section or a water body. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Water depth, averaged": Water depth averaged over a channel cross-section or water body. Averaging method to be specified in methods. The averaging method is recorded with the data. Averaged water depth m Elevation of a water surface relative to a stated datum. stage water surface elevation Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Water level": Water level relative to datum. The datum may be local or global such as NGVD 1929 and should be specified in the method description for associated data values. The datum, local or global such as NGVD 1929, is recorded with the data. Water level m Height of a water surface above the datum of a stream gauge. gauge height Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Gage height": Water level with regard to an arbitrary gage datum (also see Water depth for comparison). Gage height m Categorical phase of the tide at an observation time: high, low, flood, or ebb. tidal stage Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Tide stage": Tidal stage. A categorical value, not a height; which categories a dataset uses is the question of issue #108. Tide stage NA Vertical distance between the crest of a surface wave and the adjacent trough. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Wave height": The height of a surface wave, measured as the difference in elevation between the wave crest and an adjacent trough. Wave height m Depth at which a Secchi disk lowered from the surface is no longer visible, a measure of water transparency. Secchi disk depth Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Secchi depth": Secchi depth. Secchi depth m Rate at which light intensity declines with depth in water, the exponent of its exponential decline per unit depth. diffuse attenuation coefficient Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Light attenuation coefficient": Light attenuation coefficient. Light attenuation coefficient m-1 Density of seawater at its in situ salinity and temperature but at atmospheric pressure, minus 1000 kg m-3. sigma t Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Sigma-t": Density of seawater calculated with in situ salinity and temperature, but pressure equal to zero, rather than the in situ pressure, and 1000 kg/m^3 is subtracted. Defined as (S,T)-1000 kg m-3, where (S,T) is the density of a sample of seawater at temperature T and salinity S, measured in kg m-3, at standard atmospheric pressure. Sigma-t kg.m-3 Vertical distance from the sea floor up to a point in the water column. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "height, above sea floor": Vertical distance from the sea floor to a point. Height above sea floor m Vertical distance from the land surface down to the water table at a point. groundwater depth WTD depth to water table Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Groundwater Depth": Groundwater depth is the distance between the water surface and the ground surface at a specific location specified by the site location and offset. AmeriFlux FP-Standard base name: WTD. AmeriFlux measures from the soil surface and counts positive above it, so its values have the opposite sign to this term's depth below the surface. AmeriFlux BADM variable name: WTD. The BADM WTD group reports non-continuous water table depths. Water table depth m Rate at which water moves down from the unsaturated zone into the saturated zone and adds to groundwater, per unit area. deep drainage deep percolation Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Recharge, groundwater": Groundwater recharge or deep drainage or deep percolation is a hydrologic process where water moves downward from surface water to groundwater. Recharge is the primary method through which water enters an aquifer. This process usually occurs in the vadose zone below plant roots and is often expressed as a flux to the water table surface. Recharge occurs both naturally (through the water cycle) and through anthropogenic processes (i.e., "artificial groundwater recharge"), where rainwater and or reclaimed water is routed to the subsurface. Groundwater recharge mm.d-1 Volume of water held in a reservoir. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Reservoir storage": Reservoir water volume. Reservoir storage m3 Volumetric rate at which water flows from a well while it is pumped. pumping rate Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Well flow rate": Flow rate from well while pumping. Well flow rate m3.s-1 Pressure of the fluid at the head of a well after the well has been shut in for a period. shut-in pressure Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Wellhead pressure": The pressure exerted by the fluid at the wellhead or casinghead after the well has been shut off for a period of time, typically 24 hours. Wellhead pressure kPa Rate at which water is withdrawn or supplied for human use by a set of users. water withdrawal Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 Water use m3.d-1 Rate at which water is withdrawn for agriculture, mostly for irrigation and livestock. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Water Use, Agriculture": Water pumped for Agriculture. Agricultural water use m3.d-1 Rate at which water is withdrawn by commercial and industrial users and for power generation. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Water Use, Commercial + Industrial + Power": Water pumped by commercial, industrial users. Commercial, industrial, and power water use m3.d-1 Rate at which residents pump water from their own wells, outside public supply. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Water Use, Domestic wells": Water pumped by domestic wells; residents and landowners not using public supply. Nonagriculture wells. Domestic well water use m3.d-1 Rate at which public utilities supply water. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Water Use, Public Supply": Water supplied by a public utility. Public supply water use m3.d-1 Rate at which water is used for recreation, such as the watering of golf courses. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Water Use, Recreation": Recreational water use, for example golf courses. Recreational water use m3.d-1 Position of a gate or other structure that controls the flow of water, as a fraction of fully open. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Position": Position of an element that interacts with water such as reservoir gates. Some datasets report it as a height or a number of turns instead. Gate position 1 Thickness of alluvium above bedrock at a point. alluvium thickness Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Alluvium depth": Alluvium is loose, unconsolidated (not cemented together into a solid rock) soil or sediment that has been eroded, reshaped by water in some form, and redeposited in a non-marine setting. Alluvium is typically made up of a variety of materials, including fine particles of silt and clay and larger particles of sand and gravel. When this loose alluvial material is deposited or cemented into a lithological unit, or lithified, it is called an alluvial deposit. Alluvium depth m Resistance of a snowpack layer to penetration, usually recorded on the hand hardness scale from fist through four fingers, one finger, pencil, and knife to ice. hand hardness Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Snow layer hardness": Snow layers within the snowpack are a record of the winter’s weather. Like tree rings or strata of rock, layers can be traced to dates and conditions that formed them. One of the most important characteristics of a layer is its hardness. Harder snow is stronger and cohesive, while softer snow is weaker. Snow layer hardness NA Vertical thickness of the unsaturated zone at a point, from its top to the saturated zone below it. unsaturated zone depth vadose zone thickness Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 ODM2 variable name concept "Depth, unsaturated zone": Depth of the Unsaturated zone. The vadose zone, also termed the unsaturated zone, is the part of Earth between the land surface and the top of the phreatic zone, the position at which the groundwater (the water in the soil's pores) is at atmospheric pressure ("vadose" is from the Latin for "shallow"). Hence, the vadose zone extends from the top of the ground surface to the water table. It equals Water table depth only where the unsaturated zone runs unbroken from the land surface to the main water table; perched water or a confined aquifer separates the two. Unsaturated zone thickness m Vertical distance from the land surface down to a perched water table, a saturated zone held above the main water table by a layer of low permeability. perched groundwater depth Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 Perched water table depth m Vertical distance from the land surface down to the potentiometric surface of a confined aquifer, the level to which water rises in a well that taps it. piezometric surface depth Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 Negative for a flowing artesian well, where the level lies above the land surface. Potentiometric surface depth m Elevation of the water table above a stated datum, such as mean sea level. groundwater elevation Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 The datum is recorded with the data. Unlike Water table depth, it is measured upward from a fixed reference, not downward from the land surface. Water table elevation m Vertical distance from a well's measuring point, usually the top of its casing, down to the water surface in the well. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 Subtracting the height of the measuring point above the land surface gives Water table depth, or Potentiometric surface depth for a well in a confined aquifer. Depth to water below measuring point m Part of the cation exchange capacity of a soil held by exchangeable hydrogen and aluminium ions, commonly extracted with a neutral salt such as potassium chloride. exchangeable acidity Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Acidity, exchange": The total amount of the Cation Exchange Capacity (CEC) of a soil that is due to H+ and Al3+ ions. It is a proportion of the total acidity and it is dependent on the type of soil and the percentage of the CEC that is composed of exchangeable bases (Ca2+, Mg2+, K+). Soil exchangeable acidity cmol.kg-1 Fraction of the cation exchange capacity of a soil occupied by the exchangeable base cations calcium, magnesium, potassium, and sodium. base saturation BSAT Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Base saturation": Percent base saturation (BS) is the percentage of the Cation Exchange Capacity (CEC) occupied by the basic cations Ca2+, Mg2+ and K+. ODM2 names calcium, magnesium, and potassium. Sodium is usually counted as well, and the set of cations is recorded with the data. HWSD2: BSAT [% of CEC_SOIL]. Soil base saturation 1 Rate at which enzymes secreted into their surroundings by microbes or roots convert a substrate in an assay, per unit mass of dry soil, a measure of the capacity of a soil to break down organic macromolecules. exoenzyme activity potential enzyme activity Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Extracellular enzyme activity": Extracellular enzymes or exoenzymes are synthesized inside the cell and then secreted outside the cell, where their function is to break down complex macromolecules into smaller units to be taken up by the cell for growth and assimilation. Assays commonly supply a fluorogenic or chromogenic substrate at a saturating concentration, so the value is a potential rate. The substrate and the assay temperature and pH are recorded with the data. Extracellular enzyme activity nmol.g-1.h-1 Extracellular enzyme activity of acid phosphatase, which releases inorganic phosphate from organic phosphate monoesters, per unit mass of dry soil. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Activity, acid phosphatase": Assay for microbial activity using acid phosphatase. Acid phosphatase activity nmol.g-1.h-1 Extracellular enzyme activity of beta-glucosidase, which releases glucose in the last step of cellulose breakdown, per unit mass of dry soil. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Activity, beta-glucosidase": Assay for microbial activity using beta-glucosidase. Beta-glucosidase activity nmol.g-1.h-1 Extracellular enzyme activity of beta-N-acetylglucosaminidase, which releases N-acetylglucosamine in the breakdown of chitin and peptidoglycan, per unit mass of dry soil. NAG activity Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Activity, beta-N-acetyl glucosaminidase": Assay for microbial activity using beta-N-acetyl glucosaminidase. Beta-N-acetylglucosaminidase activity nmol.g-1.h-1 Extracellular enzyme activity of phenol oxidase, which oxidizes phenolic compounds in the breakdown of lignin, per unit mass of dry soil. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Activity, phenol oxidase": Assay for microbial activity using phenol oxidase. Commonly assayed with L-DOPA as the substrate. Phenol oxidase activity nmol.g-1.h-1 Mass of the living microbial biomass, bacteria and fungi, in a soil per unit mass of dry soil, the living part of soil organic matter. microbial biomass Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Biomass, microbial": Microbial biomass (bacteria and fungi) is a measure of the mass of the living component of soil organic matter. Often reported as its carbon or nitrogen, which Soil microbial biomass carbon and Soil microbial biomass nitrogen hold. Soil microbial biomass mg.kg-1 Dry mass of bacterial deoxyribonucleic acid per unit mass of dry soil, a measure of bacterial biomass. soil bacterial DNA biomass Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Biomass, soil bacterial deoxyribonucleic acid (DNA)": Total dry mass of soil bacterial deoxyribonucleic acid (DNA) per unit mass of soil. Soil bacterial DNA mass mg.kg-1 Concentration of sodium ions divided by the square root of half the summed concentrations of calcium and magnesium ions, each in millimoles of charge per litre, in irrigation water or a soil solution extract, an index of the hazard sodium poses to soil structure. SAR Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Sodium adsorption ratio": Sodium adsorption ratio. Formally the ratio carries a unit of (mmol/L)^0.5, which UCUM cannot write. By convention it is reported without a unit. Sodium adsorption ratio 1 Electrical conductivity of a porous medium as a whole, solids, water, and air together, as read in place by a sensor such as a time domain reflectometry probe. ECa SECA apparent electrical conductivity Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Bulk electrical conductivity": Bulk electrical conductivity of a medium measured using a sensor such as time domain reflectometry (TDR), as a raw sensor response in the measurement of a quantity like soil moisture. Distinct from the electrical conductivity of the pore water or of a soil extract, such as Measured electrical conductivity (BERVO:0001703). ODM2 describes it as a raw sensor response used on the way to a quantity such as soil water content. AmeriFlux FP-Standard base name: SECA. Bulk electrical conductivity dS.m-1 Vertical distance from the soil surface down to bedrock or another layer that restricts roots, the thickness of the soil profile at a point. SOIL_DEPTH depth to bedrock soil thickness Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Depth, soil": Depth of soil. AmeriFlux BADM variable name: SOIL_DEPTH. Soil depth m Fraction of a soil sample made up of particles larger than 2 mm in diameter, gravel and larger rock fragments. SOIL_TEX_ROCK coarse fragment content Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Soil coarse fraction": Fraction of particles within a soil sample that are greater that 2mm in diameter. The basis, mass or volume, is recorded with the data. Rock fraction is EcoSIM's volume form. HWSD2: COARSE [% volume]. AmeriFlux BADM variable name: SOIL_TEX_ROCK. Soil coarse fraction 1 Fraction of soil aggregates that resist breakdown under a stated disruptive force, such as wet sieving or rapid wetting, a measure of soil structure. water-stable aggregates Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Soil aggregate stability": Soil aggregate stability is a measure of the ability of soil aggregates to resist degradation when exposed to external forces such as water erosion and wind erosion, shrinking and swelling processes, and tillage. Soil aggregate stability is a measure of soil structure and can be impacted by soil management. Some methods report an index instead, such as a mean weight diameter or a slaking score. The method is recorded with the data. Soil aggregate stability 1 Class of a soil by the proportions of sand, silt, and clay in its fine earth, such as loam or silty clay in the USDA texture triangle, determined by feel in the field or from a particle size analysis. soil texture Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Soil texture": Soil texture is a classification instrument used both in the field and laboratory to determine soil classes based on their physical texture. Soil texture can be determined using qualitative methods such as texture by feel, and quantitative methods such as the hydrometer method. The class is read from the quantities Soil sand content (BERVO:0001526), Soil silt content (BERVO:0001527), and Soil clay content (BERVO:0001528). Soil texture class NA Class a soil is assigned to in a soil classification system, such as an order of USDA Soil Taxonomy or a reference soil group of the World Reference Base. SOIL_CLASSIFICATION soil taxonomic class Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Soil classification": For soil resources, experience has shown that a natural system approach to classification, i.e. grouping soils by their intrinsic property (soil morphology), behaviour, or genesis, results in classes that can be interpreted for many diverse uses. Differing concepts of pedogenesis, and differences in the significance of morphological features to various land uses can affect the classification approach. The classification system is recorded with the data. HWSD2: NSC_MU_SOURCE1 and NSC_MU_SOURCE2 hold a class from a national soil classification. AmeriFlux BADM variable name: SOIL_CLASSIFICATION. Soil classification NA Fraction of the dry mass of a sample lost on heating at a stated temperature until the mass stops changing, used to estimate organic matter content and, at higher temperatures, carbonate content. LOI Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Loss on ignition": Loss on ignition is a test used in inorganic analytical chemistry, particularly in the analysis of minerals. It consists of strongly heating ("igniting") a sample of the material at a specified temperature, allowing volatile substances to escape, until its mass ceases to change. Loss on ignition 1 Fraction of the soil organic matter recovered in one density fraction, light or heavy, when a soil sample is separated in a dense liquid. SOM density fraction Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Soil organic matter (SOM) density fractionation": Density fraction of Soil organic matter (SOM) in soil. Soil organic matter (SOM) is the organic matter component of soil, consisting of plant and animal residues at various stages of decomposition, cells and tissues of soil organisms, and substances synthesized by soil organisms. The liquid density, often 1.6 to 1.85 g cm-3, and which fraction is reported are recorded with the data. Soil organic matter density fraction 1 Diameter of an individual grain of sediment or soil, or of a clastic particle in a rock. grain size Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Grain size": Grain size (or particle size) is the diameter of individual grains of sediment, or the lithified particles in clastic rocks. The term may also be applied to other granular materials. Often reported in millimetres or micrometres, or on the phi scale. Particle size m Fraction of the mass of a sediment or soil sample that passes through a sieve of a stated opening in a particle size gradation test. percent passing Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Sediment, passing sieve": The amount of sediment passing a sieve in a gradation test. The sieve opening is recorded with the data. Sediment fraction passing sieve 1 Fraction of the mass of a sediment or soil sample that a sieve of a stated opening retains in a particle size gradation test. percent retained Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Sediment, retained on sieve": The amount of sediment retained on a sieve in a gradation test. The sieve opening is recorded with the data. Sediment fraction retained on sieve 1 Mass of soil, rock, or dissolved material removed from a land surface by water, wind, ice, or gravity per unit area per unit time. denudation rate Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Erosion rate": In earth science, erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location (not to be confused with weathering which involves no movement). Some studies report the rate as a lowering of the surface, a length per unit time. Erosion rate per unit area kg.m-2.a-1 Class a unit of land is assigned to in a geographical land classification, a territory within natural boundaries whose components share an origin and a characteristic structure, such as a landscape type. land unit type Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Land classification": Geographical land classification- genetically homogeneous territorial unit within natural boundaries with a certain structure and a certain character of interrelationships of considered components. Land classification NA Kind of rock that forms the bedrock at a site, by lithology, such as granite, sandstone, or limestone. bedrock lithology Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Bedrock type": In geology, bedrock is the lithified rock that lies under a loose softer material called regolith at the surface of the Earth or other terrestrial planets. Bedrock type NA Kind of material a driller encounters over a depth interval while drilling a well, as recorded in the borehole log, such as clay, sand, gravel, or a named rock. driller's log lithology Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Borehole log material classification": Classification of material encountered by a driller at various depths during the drilling of a well and recorded in the borehole log. Borehole log material classification NA Rate at which a detector counts gamma rays emitted by naturally radioactive potassium, thorium, and uranium in rock or sediment, used in a borehole or at the surface to tell lithologies apart. gamma log gamma ray log Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Gamma counts": The radioactivity of rocks has been used for many years to help derive lithologies. Natural occurring radioactive materials (NORM) include the elements uranium, thorium, potassium, radium, and radon, along with the minerals that contain them. There is usually no fundamental connection between different rock types and measured gamma ray intensity, but there exists a strong general correlation between the radioactive isotope content and mineralogy. Logging tools have been developed to read the gamma rays emitted by these elements and interpret lithology from the information collected. Borehole gamma logs are often calibrated to API gamma ray units instead. Natural gamma ray count rate {counts}.s-1 Rate at which a detector above the ground counts the neutrons that cosmic rays produce and that soil water moderates, used to estimate soil water content over a footprint of several hectares. cosmic-ray neutron count Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Neutron Count": Neutron counts of the naturally occurring cosmic rays. Cosmic-ray neutron count rate {counts}.h-1 Mass of carbon divided by the mass of nitrogen in a soil, usually from total carbon and total nitrogen measured by dry combustion. soil C:N mass ratio CN_RATIO SOIL_CHEM_CN_RATIO Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 HWSD2: CN_RATIO, unitless. HWSD2 does not state the basis; a soil C:N ratio is conventionally by mass. AmeriFlux BADM variable name: SOIL_CHEM_CN_RATIO. Soil carbon to nitrogen mass ratio g{C}.g-1{N} Amount of carbon divided by the amount of nitrogen, in moles, in a soil. soil C:N molar ratio Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 Soil carbon to nitrogen molar ratio mol{C}.mol-1{N} Mass of carbon divided by the mass of nitrogen in a plant tissue, such as leaf, stem, or root, or in a whole plant. plant C:N mass ratio Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 Legacy BADM variables mapped here, with the variant in contexts or qualifiers: BIOMASS_CN_RATIO, AG_LIT_CN_RATIO, ROOT_CN_RATIO. Organ and status go in contexts. Plant tissue carbon to nitrogen mass ratio g{C}.g-1{N} Amount of carbon divided by the amount of nitrogen, in moles, in a plant tissue, such as leaf, stem, or root, or in a whole plant. plant C:N molar ratio Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 Plant tissue carbon to nitrogen molar ratio mol{C}.mol-1{N} Capacity of water to neutralize strong acid, measured by titration with a strong acid to an endpoint of about pH 4.5, and arising in most natural waters from bicarbonate, carbonate, and hydroxide. Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Alkalinity": Alkalinity is the capacity of water to resist changes in pH that would make the water more acidic. It should not be confused with basicity which is an absolute measurement on the pH scale. Alkalinity is the strength of a buffer solution composed of weak acids and their conjugate bases. It is measured by titrating the solution with a monoprotic acid such as HCl until its pH changes abruptly, or it reaches a known endpoint where that happens. Alkalinity is expressed in units of meq/L (milliequivalents per liter), which corresponds to the amount of monoprotic acid added as a titrant in millimoles per liter. ODM2 variable name concept "Alkalinity, total": Total Alkalinity. Measured on a filtered sample. The same titration on an unfiltered sample gives Acid neutralizing capacity (BERVO:0002062). The property it measures is Total alkalinity (BERVO:8000634). Often reported as calcium carbonate, mg{CaCO3}.L-1. Water alkalinity meq.L-1 Part of the alkalinity of water contributed by bicarbonate ions. Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Alkalinity, bicarbonate": Bicarbonate Alkalinity Bicarbonate alkalinity meq.L-1 Part of the alkalinity of water contributed by carbonate ions. Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Alkalinity, carbonate": Carbonate Alkalinity. This is the carbonate part in the titration speciation of water analysis. In marine carbonate chemistry, carbonate alkalinity means bicarbonate plus twice carbonate, which is Carbonate plus bicarbonate alkalinity (BERVO:0002060) here. Carbonate alkalinity meq.L-1 Part of the alkalinity of water contributed by carbonate and bicarbonate ions together, the alkalinity less its hydroxide part. Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Alkalinity, carbonate plus bicarbonate": Alkalinity, carbonate plus bicarbonate Carbonate plus bicarbonate alkalinity meq.L-1 Part of the alkalinity of water contributed by hydroxide ions, present where the pH is above about 10. Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Alkalinity, hydroxide": Hydroxide Alkalinity Hydroxide alkalinity meq.L-1 Capacity of an unfiltered water sample, dissolved and particulate matter together, to neutralize strong acid, measured by the same titration as alkalinity. ANC Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Acid neutralizing capacity": Acid neutralizing capacity. Equal to Water alkalinity (BERVO:0002057) where the water carries no particles that react with acid. Acid neutralizing capacity meq.L-1 Capacity of water to neutralize strong base, measured by titration with a strong base to an endpoint of about pH 8.3, and arising from dissolved carbon dioxide, strong mineral acids, and hydrolyzing metal ions such as iron and aluminum. total acidity Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Acidity, total acidity": Total acidity Water acidity meq.L-1 Part of the acidity of water contributed by dissolved carbon dioxide and carbonic acid, titrated between the mineral acidity endpoint and the endpoint of about pH 8.3. CO2 acidity Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Acidity, CO2 acidity": CO2 acidity Carbon dioxide acidity meq.L-1 Part of the acidity of water contributed by strong mineral acids, titrated with a strong base to the methyl orange endpoint, between about pH 3.7 and 4.5, and present only in water whose pH is below that endpoint, such as acid mine drainage. methyl orange acidity Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Acidity, mineral acidity": Mineral Acidity Mineral acidity meq.L-1 Acidity of water measured after the sample is boiled with hydrogen peroxide, which oxidizes ferrous iron and manganese so that the acidity their hydrolysis releases is counted, used chiefly for mine drainage. hot peroxide acidity Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Acidity, hot": Hot Acidity Hot acidity meq.L-1 Mass of dissolved oxygen consumed per unit volume of water by microorganisms oxidizing its organic matter, and its reduced nitrogen unless nitrification is inhibited, during incubation in the dark at 20 degrees Celsius for a stated number of days. BOD biological oxygen demand Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 No ODM2 name. Parent of the ODM2 BOD names, which differ in the incubation period and in which oxidation they count. Biochemical oxygen demand mg{O2}.L-1 Biochemical oxygen demand measured with nitrification inhibited, the oxygen consumed in oxidizing organic carbon alone. CBOD Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 No ODM2 name. Parent of the ODM2 carbonaceous BOD names. Carbonaceous biochemical oxygen demand mg{O2}.L-1 Part of the biochemical oxygen demand consumed by nitrification, the microbial oxidation of ammonium and nitrite, usually taken as the total demand less the carbonaceous demand. NBOD Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 No ODM2 name. Parent of the ODM2 nitrogenous BOD names. Nitrogenous biochemical oxygen demand mg{O2}.L-1 Biochemical oxygen demand over an incubation of 1 day. BOD1 Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "BOD1": 1-day Biochemical Oxygen Demand 1-day biochemical oxygen demand mg{O2}.L-1 Biochemical oxygen demand over an incubation of 5 days. BOD5 Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "BOD5": 5-day Biochemical Oxygen Demand. The standard period. 5-day biochemical oxygen demand mg{O2}.L-1 Biochemical oxygen demand over an incubation of 20 days. BOD20 Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "BOD20": 20-day Biochemical Oxygen Demand 20-day biochemical oxygen demand mg{O2}.L-1 Biochemical oxygen demand once oxidation is complete, measured with a long incubation or estimated by fitting the course of oxygen consumption over time. BODu UBOD Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "BODu": Ultimate Biochemical Oxygen Demand Ultimate biochemical oxygen demand mg{O2}.L-1 Carbonaceous biochemical oxygen demand over an incubation of 2 days. CBOD2 Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "BOD2, carbonaceous": 2-day Carbonaceous Biochemical Oxygen Demand 2-day carbonaceous biochemical oxygen demand mg{O2}.L-1 Carbonaceous biochemical oxygen demand over an incubation of 3 days. CBOD3 Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "BOD3, carbonaceous": 3-day Carbonaceous Biochemical Oxygen Demand 3-day carbonaceous biochemical oxygen demand mg{O2}.L-1 Carbonaceous biochemical oxygen demand over an incubation of 4 days. CBOD4 Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "BOD4, carbonaceous": 4-day Carbonaceous Biological Oxygen Demand 4-day carbonaceous biochemical oxygen demand mg{O2}.L-1 Carbonaceous biochemical oxygen demand over an incubation of 5 days. CBOD5 Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "BOD5, carbonaceous": 5-day Carbonaceous Biochemical Oxygen Demand 5-day carbonaceous biochemical oxygen demand mg{O2}.L-1 Carbonaceous biochemical oxygen demand over an incubation of 6 days. CBOD6 Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "BOD6, carbonaceous": 6-day Carbonaceous Biological Oxygen Demand 6-day carbonaceous biochemical oxygen demand mg{O2}.L-1 Carbonaceous biochemical oxygen demand over an incubation of 7 days. CBOD7 Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "BOD7, carbonaceous": 7-day Carbonaceous Biochemical Oxygen Demand 7-day carbonaceous biochemical oxygen demand mg{O2}.L-1 Carbonaceous biochemical oxygen demand over an incubation of 20 days. CBOD20 Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "BOD20, carbonaceous": 20-day Carbonaceous Biochemical Oxygen Demand 20-day carbonaceous biochemical oxygen demand mg{O2}.L-1 Carbonaceous biochemical oxygen demand once the oxidation of organic carbon is complete. CBODu Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "BODu, carbonaceous": Carbonaceous Ultimate Biochemical Oxygen Demand Ultimate carbonaceous biochemical oxygen demand mg{O2}.L-1 Nitrogenous biochemical oxygen demand over an incubation of 5 days. NBOD5 Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "BOD5, nitrogenous": 5-day Nitrogenous Biochemical Oxygen Demand 5-day nitrogenous biochemical oxygen demand mg{O2}.L-1 Nitrogenous biochemical oxygen demand over an incubation of 20 days. NBOD20 Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "BOD20, nitrogenous": 20-day Nitrogenous Biochemical Oxygen Demand 20-day nitrogenous biochemical oxygen demand mg{O2}.L-1 Nitrogenous biochemical oxygen demand once nitrification is complete. NBODu Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "BODu, nitrogenous": Nitrogenous Ultimate Biochemical Oxygen Demand Ultimate nitrogenous biochemical oxygen demand mg{O2}.L-1 Mass of oxygen equivalent to the organic and oxidizable inorganic matter in a water sample, found by oxidizing it with a strong chemical oxidant, usually hot acid dichromate. COD Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "COD": Chemical oxygen demand Chemical oxygen demand mg{O2}.L-1 Concentration of polyvalent metal cations in water, chiefly calcium and magnesium, expressed as the equivalent mass of calcium carbonate. total hardness Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Hardness, total": Total hardness Water hardness mg{CaCO3}.L-1 Part of the hardness of water contributed by calcium, expressed as calcium carbonate. Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Hardness, Calcium": Hardness of calcium Calcium hardness mg{CaCO3}.L-1 Part of the hardness of water contributed by magnesium, expressed as calcium carbonate. Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Hardness, Magnesium": Hardness of magnesium Magnesium hardness mg{CaCO3}.L-1 Part of the hardness of water equivalent to its carbonate and bicarbonate alkalinity, which boiling removes by precipitating calcium carbonate, and equal to the total hardness where the alkalinity exceeds it. temporary hardness Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Hardness, carbonate": Carbonate hardness also known as temporary hardness Carbonate hardness mg{CaCO3}.L-1 Part of the hardness of water in excess of its carbonate hardness, balanced by anions such as sulfate and chloride, which boiling does not remove. permanent hardness Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Hardness, non-carbonate": Non-carbonate hardness Non-carbonate hardness mg{CaCO3}.L-1 Mass concentration of the residue left when a water sample is evaporated and dried at 103 to 105 degrees Celsius, dissolved and suspended solids together. Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Solids, total": Total Solids Total solids mg.L-1 Mass concentration of the solids in the part of a water sample that passes a glass fiber filter of nominal pore size 2 micrometers or less, found by evaporating the filtrate and drying the residue at 180 degrees Celsius. TDS Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Solids, total dissolved": Total Dissolved Solids Total dissolved solids mg.L-1 Mass concentration of the solids that a glass fiber filter of nominal pore size 2 micrometers or less retains from a water sample, dried at 103 to 105 degrees Celsius. TSS Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Solids, total suspended": Total Suspended Solids. Distinct from Suspended sediment concentration (BERVO:0002118), which is measured on the whole sample. Total suspended solids mg.L-1 Mass concentration of the total solids that remain after ignition at 550 degrees Celsius, mostly mineral matter. Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Solids, total fixed": Total Fixed Solids Total fixed solids mg.L-1 Mass concentration of the total solids lost on ignition at 550 degrees Celsius, an approximate measure of their organic matter. Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Solids, total volatile": Total Volatile Solids Total volatile solids mg.L-1 Mass concentration of the dissolved solids that remain after ignition at 550 degrees Celsius. Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Solids, fixed dissolved": Fixed Dissolved Solids. ODM2's identifier misspells fixed as rixed; the cross-reference uses it as ODM2 spells it. Fixed dissolved solids mg.L-1 Mass concentration of the dissolved solids lost on ignition at 550 degrees Celsius. Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Solids, volatile dissolved": Volatile Dissolved Solids Volatile dissolved solids mg.L-1 Mass concentration of the suspended solids that remain after ignition at 550 degrees Celsius. Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Solids, fixed suspended": Fixed Suspended Solids Fixed suspended solids mg.L-1 Mass concentration of the suspended solids lost on ignition at 550 degrees Celsius. VSS Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Solids, volatile suspended": Volatile Suspended Solids Volatile suspended solids mg.L-1 Color of water, found by comparison with platinum-cobalt standards and reported in color units, one unit being the color of 1 mg of platinum per liter. apparent color true color Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Color": Color in quantified in color units. True color is measured after turbidity is removed, and apparent color without. Water color {PCU} Odor of water, reported as the ratio by which a sample must be diluted with odor-free water for its odor to be just detectable. TON odor Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Odor": Odor Threshold odor number 1 Mass concentration of the substances that a solvent, usually n-hexane, extracts from an acidified water sample and that remain when the solvent is evaporated, chiefly fats, oils, waxes, and petroleum hydrocarbons. hexane extractable material FOG HEM Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Oil and grease": Oil and grease Oil and grease mg.L-1 Decadic absorption coefficient of a filtered water sample for ultraviolet light at a stated wavelength, its absorbance divided by the optical path length. ultraviolet absorbance Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Absorbance, ultraviolet": Absorbance of ultraviolet light at a specified wavelength, typically at 254 or 280 nm for water samples. Not normalized to DOC concentration like variables such as SUVA280. Often reported per centimeter of path length, cm-1. Ultraviolet absorption coefficient m-1 Ultraviolet absorption coefficient of a filtered water sample at a stated wavelength divided by its dissolved organic carbon concentration, an index of the aromatic content of its dissolved organic matter. SUVA Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 No ODM2 name. Parent of the ODM2 SUVA names. Specific ultraviolet absorbance L.mg-1.m-1 Specific ultraviolet absorbance at a wavelength of 254 nm. SUVA254 Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "SUVA254": Specific ultraviolet absorbance at 254 nm. Determined by absorbance normalized to DOC concentration. Specific ultraviolet absorbance at 254 nm L.mg-1.m-1 Specific ultraviolet absorbance at a wavelength of 280 nm. SUVA280 Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "SUVA280": Specific ultraviolet absorbance at 280 nm. Determined by absorbance normalized to dissolved organic carbon (DOC) concentration. Specific ultraviolet absorbance at 280 nm L.mg-1.m-1 Fluorescence of the dissolved organic matter in a water sample, usually excited near 365 nm and read near 480 nm, reported relative to a quinine sulfate standard. fDOM CDOM fluorescence Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Fluorescence, dissolved organic matter (DOM)": Fluorescence of dissolved organic matter (DOM). ODM2 variable name concept "Fluorescence, dissolved organic carbon (DOC)": Fluorescence of dissolved organic carbon (DOC). DOC is an element specific fraction of dissolved organic matter (DOM). The two ODM2 names are one quantity here. The molecules that fluoresce are the dissolved organic matter, and a fluorescence reading does not isolate their carbon. Some sensors report relative fluorescence units, {RFU}. A reading calibrated to a dissolved organic carbon concentration, in mg.L-1, is an estimate of that concentration and needs its own term. Dissolved organic matter fluorescence {QSU} Ratio of the fluorescence emission of dissolved organic matter at 470 nm to that at 520 nm, at an excitation wavelength of 370 nm, higher where the organic matter comes from microbes and lower where it comes from land plants. FI Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Fluorescence index": Fluorescence index for measuring fluorescent dissolved organic matter (FDOM). Ratio of emission intensity at 470nm to intensity at 520nm at excitation 370nm. Fluorescence index 1 Ratio of the fluorescence emission of dissolved organic matter between 435 and 480 nm to that between 300 and 345 nm, at an excitation wavelength of 254 nm, higher where the organic matter is more humified. HIX Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Humification index": Humification index. Hummification is the processes by which organic matter decomposes to form humus. In humus the initial structures or shapes can no longer be recognized. See also humus. ODM2 defines humification, not the index. This is the index of Zsolnay and others (1999). Ohno (2002) divides by the sum of the two regions instead, which keeps the value between 0 and 1. Humification index 1 Concentration of dissolved oxygen in water as a fraction of the concentration at equilibrium with the atmosphere at the water's temperature, salinity, and pressure, above 1 when the water is supersaturated. DO saturation dissolved oxygen percent saturation Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Oxygen, dissolved percent of saturation": Dissolved oxygen, percent saturation. Usually reported in percent. Dissolved oxygen saturation 1 Difference between the pH of water and the pH at which it would be saturated with calcium carbonate at its temperature, calcium concentration, and alkalinity, positive where the water tends to deposit calcium carbonate and negative where it tends to dissolve it. LSI Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "LSI": Langelier Saturation Index is an indicator of the degree of saturation of water with respect to calcium carbonate Langelier saturation index 1 Product of the calcium and carbonate ion concentrations in water divided by the stoichiometric solubility product of aragonite at the same temperature, salinity, and pressure, above 1 where the water is supersaturated and below 1 where it is undersaturated. omega aragonite Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Aragonite saturation state": A measure of the thermodynamic tendency for the mineral calcium carbonate to form or to dissolve. The symbol Ω (omega) is often used as shorthand for "calcium carbonate saturation state". By convention, Ω is usually expressed with respect to aragonite, one of the two most abundant forms of calcium carbonate in the ocean. An aragonite saturation state (Ωar) greater than 1.0 indicates supersaturation, while values less than 1.0 indicate undersaturation with instability favoring dissolution. Aragonite saturation state 1 Index of the trophic state of a lake on a scale of about 0 to 100, computed from Secchi depth, chlorophyll a concentration, or total phosphorus concentration, in which each rise of 10 marks a halving of Secchi depth. TSI Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 No ODM2 name. Parent of Secchi depth trophic state index, which ODM2 names. Carlson (1977) gave matching forms from chlorophyll a and total phosphorus. Carlson trophic state index 1 Carlson trophic state index computed from Secchi depth, 60 less 14.41 times the natural logarithm of the Secchi depth in meters. TSI(SD) Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "TSI": Carlson Trophic State Index is a measurement of eutrophication based on Secchi depth Secchi depth trophic state index 1 Number of insoluble particles per unit volume of a liquid such as rainwater or surface water, usually counted in size classes by an optical or electrical counter. particle count Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Particle counts": Count of insoluble particles in a liquid like rainwater Particle number density in water {particles}.m-3 Radioactivity of the alpha-emitting radionuclides in a water sample per unit volume, measured together without identifying the nuclides. gross alpha gross alpha radionuclides Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Gross alpha radionuclides": Gross Alpha Radionuclides. Often reported in picocuries per liter, pCi.L-1. Gross alpha activity Bq.L-1 Radioactivity of the beta-emitting radionuclides in a water sample per unit volume, measured together without identifying the nuclides. gross beta gross beta radionuclides Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Gross beta radionuclides": Gross Beta Radionuclides. Often reported in picocuries per liter, pCi.L-1. Gross beta activity Bq.L-1 Mass of sediment carried in suspension per unit volume of the water and sediment mixture, measured on the whole sample collected. SSC Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Sediment, suspended": Suspended Sediment. Distinct from Total suspended solids (BERVO:0002093), which is measured on a subsample and can understate the sand in it. Suspended sediment concentration mg.L-1 Mass of sediment carried in suspension past a cross-section of a stream per unit time. suspended sediment discharge suspended load Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Load, suspended": The suspended load of a flow of fluid, such as a river, is the portion of its sediment uplifted by the fluid's flow in the process of sediment transportation. It is kept suspended by the fluid's turbulence. The suspended load generally consists of smaller particles, like clay, silt, and fine sands. ODM2 defines the sediment itself. As an observable it is the rate at which that sediment passes a section, as streamgaging agencies report it. Suspended sediment load t.d-1 Area of land surface burned by fire over a given period. burnt area area burned Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Burned area m2 Fraction of a given land area, such as a grid cell or region, burned by fire over a given period. fraction burned Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Burned area fraction 1 Total area burned by a single fire. fire area Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Fire size m2 Mass of fuel available to burn per unit ground area. fuel loading Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Fuel load kg.m-2 Mass of fuel burned per unit ground area during a fire. fuel consumed Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Fuel burned by a fire, not fuel used by engines or vehicles. Distinct from the EcoSIM fire emission and flux variables, which track the gases released rather than the mass of fuel burned. Fuel consumption kg.m-2 Mass of water held in fuel per unit mass of dry fuel. fuel moisture Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Fuel moisture content g{H2O}.g-1{fuel} Fraction of the canopy fuel present before a fire that the fire consumes. canopy consumption Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Canopy fuel consumption fraction 1 Mass of a chemical species emitted per unit mass of dry fuel burned in a fire. emission factor Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Fire emission factor g.kg-1 Mass of fine particulate matter (PM2.5) emitted per unit mass of dry fuel burned in a fire. PM2.5 emission factor Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Fire fine particulate matter emission factor g.kg-1 Mass of fine particulate matter (PM2.5) emitted by fire over a given area and period. PM2.5 emission from fire A total over a defined study area and period, as regional fire emission inventories report it (e.g. Kiely et al. 2024, doi:10.1021/acs.est.3c06421), not a grid-cell total. The unit is therefore g, not the g/{grid} of the EcoSIM fire emission variables, deliberately. Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Fire fine particulate matter emission g Mass of carbon monoxide emitted by fire over a given area and period. CO emission from fire A total over a defined study area and period, as regional fire emission inventories report it (e.g. Kiely et al. 2024, doi:10.1021/acs.est.3c06421), not a grid-cell total. The unit is therefore g, not the g/{grid} of the EcoSIM fire emission variables, deliberately. Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Fire carbon monoxide emission g Mass concentration of fine particulate matter (PM2.5) in air attributable to fire emissions, taken as the difference between the concentrations with and without fire. fire PM2.5 smoke PM2.5 Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Fire-derived fine particulate matter concentration ug.m-3 Height above ground of the top of the smoke plume from a fire. plume height plume injection height Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Smoke plume top height m Categorical class of a fire by its origin and control, such as wildfire or prescribed fire. DM_FIRE AmeriFlux BADM variable name: DM_FIRE. Values are the Fire concepts, including Underburn and Prescribed underburn. Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Fire type NA Categorical record of whether a site or area has burned, such as burned or unburned. Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire history terms for issue #134 Used, for example, to separate burned sites from unburned reference sites, as in NGEE Arctic post-fire soil respiration data, doi:10.15485/3377026 (column bstatus). Burn status NA Time elapsed since the most recent fire at a site. time since last fire fire age Can be derived from the observation date and Date of fire (BERVO:0001835), which NGEE Arctic post-fire soil respiration data, doi:10.15485/3377026 records as column yburned. Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire history terms for issue #134 Time since fire a Number of fires that have burned a given site or area over a given record period. burn count fire count times burned Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire history terms for issue #134 Repeated burning distinguishes sites in, for example, NGEE Arctic post-fire soil respiration data, doi:10.15485/3377026, where sites had burned three and four times. Number of fires 1 Mean time between successive fires at a site or in an area, computed from the fires recorded over a given record period. fire interval mean fire return interval Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire history terms for issue #134 The empirical interval, from a fire record such as fire scars or fire perimeters, not a modelled or expected interval for a fire regime. Over the same record period it is close to the reciprocal of Number of fires (BERVO:0002136) per unit time. Fire return interval a Volume of wastewater flowing past a point in a sewer, or into or out of a treatment plant, per unit time. influent flow rate plant flow sewage flow wastewater discharge Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Wastewater flow rate m3.d-1 Number of people whose wastewater drains to a given sewer network, sewershed, or treatment plant. catchment population connected population sewershed population Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Used to normalize wastewater loads to per-person values. Distinct from Population equivalent (BERVO:0002140), which is derived from the load itself. Population served 1 Biochemical oxygen demand load reaching a treatment plant divided by a standard per-person load, in the EU 60 g of 5-day biochemical oxygen demand per day, giving the number of people who would produce that load. PE p.e. Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 The EU standard is set by Council Directive 91/271/EEC, Article 2(6). The load itself, in g{O2}.d-1, is Biochemical oxygen demand load (BERVO:0002157). Population equivalent 1 Amount of a constituent carried by wastewater past a point per unit time, the product of its concentration and the wastewater flow rate. daily load mass load Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 The constituent may be a chemical or a genetic marker counted in copies, so involves_chemicals is left empty. Wastewater load g.d-1 {copies}.d-1 Wastewater load divided by the population served, the amount of a constituent contributed per person per day. per capita load population-normalized load Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Population-normalized wastewater load g.d-1/{person} {copies}.d-1/{person} Mean time wastewater spends in a reactor or treatment unit, the volume of the unit divided by the flow rate through it. HRT hydraulic residence time Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Hydraulic retention time h Mean time solids, chiefly microbial biomass, spend in a biological treatment system, the mass of solids held divided by the mass removed per unit time. SRT solids retention time mean cell residence time sludge age Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 MIxS gives hours as the preferred unit for sludge_retent_time (MIXS:0000669). BERVO uses days, the unit sludge retention times are reported in, typically 3 to 30 days. Sludge retention time d Fraction of the wastewater received by a treatment plant that comes from industrial sources. industrial effluent percent Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 MIxS records this as a percentage (indust_eff_percent). BERVO writes fractions as the dimensionless 1. Industrial wastewater fraction 1 Fraction of the volatile solids entering an anaerobic digester that are destroyed in it. efficiency percent volatile solids reduction Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 MIxS records this as a percentage (efficiency_percent). BERVO writes fractions as the dimensionless 1. Volatile solids removal efficiency 1 Negative logarithm of the hydrogen ion activity of wastewater, measured on a sample at the time of collection. sewage pH Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Recorded for each sample in the Global Sewage Project, BioProject PRJEB13831 (Hendriksen et al. 2019, Nat Commun 10:1124, doi:10.1038/s41467-019-08853-3). Wastewater pH 1 Temperature of wastewater at the point and time of sampling. sewage temperature Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Recorded for each sample in the Global Sewage Project, BioProject PRJEB13831 (Hendriksen et al. 2019, Nat Commun 10:1124, doi:10.1038/s41467-019-08853-3). Wastewater temperature Cel Categorical record of the origin of a wastewater, such as domestic sewage, industrial wastewater, or stormwater. Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Wastewater type NA Categorical record of the kind of wastewater a treatment plant is built to treat, such as municipal or industrial. sewage type Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 The MIxS field sewage_type (MIXS:0000215) is defined this way. In practice it also records the kind of sampling point, as in the NMDC rendering of the Global Sewage Project, BioProject PRJEB13831 (open sewer line, manhole, river). Wastewater sampling point type (BERVO:0002151) covers that use. Wastewater treatment plant type NA Categorical record of the kind of place in a sewer system where a wastewater sample was taken, such as a treatment plant inlet, an open or covered sewer line, a manhole, or a receiving river. Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Wastewater sampling point type NA Number of copies of a target gene or genetic marker per unit volume or mass of a sample, usually measured by quantitative or digital PCR. gene copies per liter gene copy number concentration Common in wastewater-based surveillance for the genetic markers of pathogens, such as SARS-CoV-2 RNA, and for antimicrobial resistance genes. Written per litre, as qPCR and digital PCR results are reported, where Microbial cell density and Colony-forming unit density use m-3. {copies} counts gene copies, not the detector events of {counts} on the radiation count rates. Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Gene copy concentration {copies}.L-1 {copies}.g-1 Abundance of antimicrobial resistance genes in a metagenome, as the number of sequenced fragments matched to them normalized for gene length and sequencing depth. ARG abundance resistance gene abundance Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 FPKM is fragments per kilobase of reference gene per million fragments sequenced. The Global Sewage Project, BioProject PRJEB13831 summed it over the genes of each drug class (Hendriksen et al. 2019, Nat Commun 10:1124, doi:10.1038/s41467-019-08853-3). Antimicrobial resistance gene abundance {FPKM} Diversity index equal to one minus the probability that two individuals drawn at random from a community belong to the same taxon, from 0 for a single taxon up to 1 - 1/S for S equally abundant taxa. Gini-Simpson diversity index Simpson diversity index Simpson index Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 The 1 - D form, as used by Hendriksen et al. 2019, Nat Commun 10:1124, doi:10.1038/s41467-019-08853-3. Distinct from Simpson's dominance D and the inverse Simpson index 1/D. Gini-Simpson index 1 Estimate of the total number of taxa in a community, including those not observed, from the observed taxa count and the numbers of taxa observed exactly once and exactly twice. Chao1 Chao1 index Chao1 richness Compare Taxa count (BERVO:0001986), the observed number. Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Chao1 richness estimator 1 Dissimilarity between the compositions of two communities, the sum of the absolute differences in taxon abundance divided by the sum of all abundances in both, ranging from 0 for identical communities to 1 for communities sharing no taxa. Bray-Curtis distance Bray-Curtis index "Distance" is related, not exact: Bray-Curtis is not a metric. Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Bray-Curtis dissimilarity 1 Wastewater load of 5-day biochemical oxygen demand, the mass of oxygen per day that the organic matter carried past a point would consume, used to size treatment plants and to derive population equivalent. BOD5 load BOD load organic load Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 The load of 5-day biochemical oxygen demand (BERVO:0002071), and the load-dimensioned counterpart of Population equivalent (BERVO:0002140), which divides it by a standard per-person load. Biochemical oxygen demand load g{O2}.d-1 Net rate at which dissolved aluminum trihydroxide, Al(OH)3(aq), is produced in a soil layer by the equilibrium reactions of the geochemical solver, with solid Al(OH)3, with Al(OH)2(+) and Al(OH)4(-), and with aluminum phosphate, per grid cell and hour. TRChem_AlO3H3_soil Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) SoluteChemDataType.F90 Unlike its iron twin BERVO:0001720, this quantity has no per-layer array in EcoSIM AqueChemDatatype. The solver computes it as TRChem_AlO3H3_soil (SaltChemEquilibriaMod.F90) and passes it to the model through trcSalt_RGeoChem_flx_vr (BERVO:0001716). Total solute aluminum trihydroxide transformation mol.h-1/{grid} Mass of nitrogen in all forms, organic and inorganic, per unit mass of dry soil, usually measured by dry combustion or Kjeldahl digestion. SOIL_CHEM_N_TOT TOTAL_N Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: TOTAL_N [g/kg]. Distinct from Total soil nitrogen (BERVO:0000324), which is EcoSIM's nitrogen gas in soil air. AmeriFlux BADM variable name: SOIL_CHEM_N_TOT. Soil total nitrogen content g.kg-1 pH of a suspension of soil in water, as distinct from one in a salt solution such as calcium chloride or potassium chloride. soil pH (H2O) PH_WATER SOIL_CHEM_PH_H2O Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: PH_WATER [-log(H+)]. The soil to water ratio, commonly 1:1 or 1:2.5, is recorded with the data. AmeriFlux BADM variable name: SOIL_CHEM_PH_H2O. Soil pH in water 1 Cation exchange capacity of the clay fraction of a soil per unit mass of clay, commonly estimated from the soil cation exchange capacity by removing the part attributed to organic matter and dividing by the clay content. CEC of clay CEC_CLAY Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: CEC_CLAY [cmolc/kg]. The mass is of clay, not of soil. See Soil cation exchange capacity (BERVO:0000883). Soil clay fraction cation exchange capacity cmol.kg-1{clay} Cation exchange capacity of a soil at its own pH, the sum of its exchangeable base cations and its exchangeable acidity. ECEC effective cation exchange capacity CEC_EFF Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: CEC_EFF [cmolc/kg]. Soil cation exchange capacity (BERVO:0000883) is usually measured at a buffered pH of 7 or 8.2, and is larger than this in acid soils. Soil effective cation exchange capacity cmol.kg-1 Sum of the exchangeable calcium, magnesium, potassium, and sodium held by a soil, per unit mass of dry soil. total exchangeable bases TEB Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: TEB [cmolc/kg]. Soil total exchangeable bases cmol.kg-1 Fraction of the effective cation exchange capacity of a soil occupied by exchangeable aluminum. aluminium saturation aluminum saturation ALUM_SAT Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: ALUM_SAT [% of ECEC]. Soil aluminum saturation 1 Fraction of the cation exchange capacity of a soil occupied by exchangeable sodium, the usual measure of soil sodicity. exchangeable sodium percentage ESP Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: ESP [%]. Usually reported as a percentage, with 15 percent the common threshold for a sodic soil. Soil exchangeable sodium fraction 1 Carbonate content of a soil expressed as the mass of calcium carbonate that would neutralize the same amount of acid, per unit mass of dry soil, so that magnesium and other carbonates are counted as calcium carbonate. calcium carbonate equivalent TCARBON_EQ Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: TCARBON_EQ [% weight]. Distinct from Soil calcium carbonate content (BERVO:0001687), EcoSIM's calcite expressed as calcium. Soil calcium carbonate equivalent g.kg-1 Mass of gypsum, calcium sulfate dihydrate, per unit mass of dry soil. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: GYPSUM [% weight]. Soil gypsum content g.kg-1 Electrical conductivity of the solution extracted from a saturated soil paste, the standard laboratory measure of soil salinity. ECe electrical conductivity of the saturation extract ELEC_COND Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: ELEC_COND [dS/m]. HWSD v1.2 named the same field T_ECE and S_ECE. Distinct from Bulk electrical conductivity (BERVO:0002036), read in place by a sensor, and from Measured electrical conductivity (BERVO:0001703), EcoSIM's input. Soil saturation extract electrical conductivity dS.m-1 Bulk density of a soil estimated from its texture and organic matter content with a pedotransfer function, rather than measured. REF_BULK REF_BULK_DENSITY Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: REF_BULK [g/cm3] in HWSD2_LAYERS and REF_BULK_DENSITY in HWSD2_SMU. See Soil bulk density (BERVO:0001535). Soil reference bulk density Mg.m-3 g.cm-3 Depth of water a soil can hold between field capacity and the permanent wilting point, per unit depth of soil. available water capacity AWC SOIL_TEX_WATER_HOLD_CAP Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: AWC [mm/m] in HWSD2_SMU, in classes of 150, 125, 100, 75, 50, 15, and 0 mm/m. AmeriFlux BADM variable name: SOIL_TEX_WATER_HOLD_CAP. Soil available water capacity mm.m-1 Depth of water a soil can hold between field capacity and the permanent wilting point, summed over its rootable depth. AWC Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: AWC [mm] in HWSD2_LAYERS, a profile total held on layer D1 only, one value per soil component. See Soil available water capacity and Rootable soil depth. Root zone available water capacity mm Class of a soil by how quickly and completely water is removed from it under natural conditions, judged from the frequency and duration of its saturation, from excessively drained to very poorly drained. drainage class Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after FAO (2006) Guidelines for Soil Description, 4th edition; issue #120 HWSD2: DRAINAGE, seven classes: E excessively drained, SE somewhat excessively drained, W well drained, MW moderately well drained, I imperfectly drained, P poorly drained, VP very poorly drained. Soil drainage class NA Depth from the soil surface to which plant roots can grow before an obstacle, such as bedrock, a cemented or dense layer, or a permanently saturated layer, stops them. depth to obstacle to roots effective soil depth ROOTS ROOT_DEPTH Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: ROOT_DEPTH, in classes: deep (more than 100 cm), moderately deep (less than 100 cm), shallow (less than 50 cm), and very shallow (less than 10 cm). Also ROOTS, the depth of an obstacle to roots from the European Soil Database, in ranges of cm. Rootable soil depth cm m Depth from the soil surface to the top of a layer through which water cannot pass at a significant rate. impermeable layer depth IL Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: IL, from the European Soil Database, in ranges: more than 150, 80 to 150, 40 to 80, and less than 40 cm. Depth to impermeable layer cm m Class of a soil by the depth and annual duration of its waterlogging, as defined in the European Soil Database. soil water regime SWR Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: SWR, four classes: slightly wet, moderately wet, wet, and very wet. Soil water regime class NA Subdivision of a soil unit by a feature that matters for land use or management but is not used to classify the soil, such as stoniness, shallow hard rock, a cemented layer, salinity, or flooding. PHASE1 PHASE2 Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: PHASE1 and PHASE2, a primary and a secondary phase from a list of 30, such as stony, lithic, petrocalcic, saline, and fragipan. Soil phase NA Vertical distance from the soil surface to the upper boundary of a soil layer. TOPDEP Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: TOPDEP [cm]. See Depth to bottom of soil layer (BERVO:0000974). Depth to top of soil layer cm m Fraction of the area of a soil mapping unit covered by one of the soils it contains. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: SHARE [%], with SEQUENCE ordering the components. The shares in one mapping unit sum to 100 percent. Soil mapping unit component share 1 Class a soil is assigned to in the World Reference Base for Soil Resources, from a reference soil group alone to a group with principal and supplementary qualifiers. World Reference Base soil classification SOIL_WRB_GROUP WRB2 WRB4 WRB_PHASES Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 holds the reference soil group (values under WRB reference soil group, BERVO:8000982), WRB4 a group with one qualifier, and WRB_PHASES a group with qualifiers and phases, all from WRB 2022. WRB2 also has codes for glaciers, open water, and areas with no data. AmeriFlux BADM variable name: SOIL_WRB_GROUP. WRB soil classification NA Class a soil is assigned to in the Revised Legend of the FAO-UNESCO Soil Map of the World, at the level of a major soil grouping or a soil unit. FAO 1990 soil classification FAO90 Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: FAO90, with 193 major soil groupings and soil units. The legend was published in 1988 and is usually called FAO-90. FAO-90 soil classification NA Class a soil is assigned to in USDA Soil Taxonomy, at the level of order, suborder, great group, subgroup, family, or series. USDA soil taxonomy class SOIL_ORDER SOIL_SERIES Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Survey Staff (2022) Keys to Soil Taxonomy, 13th edition; issue #120 Not in HWSD2. Requested in issue #120. Orders are under USDA soil order (BERVO:8001015). AmeriFlux BADM variable names: SOIL_ORDER, SOIL_SERIES. SOIL_ORDER values map to the USDA soil order concepts. USDA Soil Taxonomy classification NA Group a soil is assigned to in the Unified Soil Classification System, an engineering classification by grain size distribution and, for fine-grained soil, by liquid limit and plasticity index. Unified Soil Classification System classification USCS group Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after ASTM D2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); issue #120 Not in HWSD2. Requested in issue #120. Groups are under USCS soil group (BERVO:8001043). USCS soil classification NA Soil texture class assigned with the USDA texture triangle from the mass fractions of sand (0.05 to 2 mm), silt (0.002 to 0.05 mm), and clay (less than 0.002 mm) in the fine earth. USDA texture class TEXTURE_USDA Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Science Division Staff (2017) Soil Survey Manual, USDA Handbook 18; issue #120 HWSD2: TEXTURE_USDA, with 13 codes: the 12 USDA classes, with clay split into heavy clay and light clay. Values are under USDA soil texture class (BERVO:8001028). USDA soil texture classification NA Soil texture class in one of five broad groups used in the SOTER database and the FAO-UNESCO Soil Map of the World, coarse, medium, medium fine, fine, and very fine, defined by clay and sand content. TEXTURE_SOTER Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 HWSD2: TEXTURE_SOTER, codes C coarse, M medium, Z medium fine, F fine, V very fine. SOTER soil texture classification NA Dry mass of a leaf divided by its one-sided area, a measure of leaf construction cost and thickness. LMA SLW leaf mass area specific leaf weight Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 The reciprocal of specific leaf area (TO:0000562), and so not cross-referenced to it. Leaf area:mass during growth (BERVO:0000783) is the EcoSIM specific leaf area. AmeriFlux BADM variable name: LMA. Leaf mass per area g.m-2 Mass of carbon in a leaf per unit of its one-sided area. Carea area-based leaf carbon content Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Leaf carbon content per unit area g{C}.m-2 Mass of nitrogen in a leaf per unit of its one-sided area. Narea area-based leaf nitrogen content Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Leaf nitrogen content per unit area g{N}.m-2 Mass of carbon in a leaf per unit of its dry mass. Cmass mass-based leaf carbon content Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Leaf carbon content per unit dry mass mg{C}.g-1{dry_mass} Mass of nitrogen in a leaf per unit of its dry mass. Nmass mass-based leaf nitrogen content Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Leaf nitrogen content per unit dry mass mg{N}.g-1{dry_mass} Temperature of the ground at the permafrost table, the upper surface of the permafrost beneath the active layer. top of permafrost temperature A single reading, as from a probe, not the mean annual temperature at the top of permafrost (TTOP) used in permafrost models. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Temperature at the top of permafrost Cel K Whether permafrost is found within a stated depth of the ground surface, usually the reach of a frost or thaw probe. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Near-surface permafrost presence NA Mass of carbon in dissolved inorganic forms, carbon dioxide, bicarbonate, and carbonate, per unit volume of water. DIC concentration Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "Carbon, dissolved inorganic": Dissolved Inorganic Carbon Dissolved organic carbon concentration (BERVO:0001670) is its organic counterpart in soil water. Dissolved inorganic carbon concentration mg{C}.L-1 Amount of ferrous iron, Fe(II), dissolved per unit volume of water. dissolved Fe(II) concentration Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name ironFerrous (Iron, ferrous) does not say dissolved, so it is not cross-referenced as an equivalent. Dissolved ferrous iron concentration umol.L-1 Amount of manganese dissolved per unit volume of water, in natural waters mostly as manganese(II). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "Manganese, dissolved": Dissolved Manganese (Mn) Dissolved manganese concentration umol.L-1 Amount of dissolved sulfide, the sum of hydrogen sulfide, bisulfide, and sulfide ion, per unit volume of water. hydrogen sulfide concentration Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "Sulfide, dissolved": Dissolved Sulfide Dissolved sulfide concentration umol.L-1 Amount of sulfate ion dissolved per unit volume of water. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "Sulfate, dissolved": Dissolved Sulfate (SO4) Dissolved sulfate concentration umol.L-1 Amount of chloride ion dissolved per unit volume of water, a conservative tracer of seawater and road salt. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "Chloride, dissolved": Dissolved Chloride (Cl-) Dissolved chloride concentration umol.L-1 Amount of ammonium ion dissolved per unit volume of water, excluding un-ionized ammonia. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name nitrogen_NH4 does not say dissolved, and nitrogenDissolved_Free_Ionized_Ammonia_NH3_NH4 is ammonia and ammonium together, so neither is cross-referenced as an equivalent. Dissolved ammonium concentration umol.L-1 Amount of un-ionized ammonia, NH3, dissolved per unit volume of water, usually calculated from total ammonia, pH, and temperature. free ammonia concentration Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name nitrogen_NH3 does not say dissolved, so it is not cross-referenced as an equivalent. Dissolved ammonia concentration umol.L-1 Combined amount of nitrate and nitrite dissolved per unit volume of water, as reported where one analysis measures both. NOx concentration nitrate + nitrite concentration Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "Nitrogen, dissolved nitrite (NO2) + nitrate (NO3)": Dissolved nitrite (NO2) + nitrate (NO3) nitrogen ODM2 expresses it as nitrogen; a molar unit is the same either way. Dissolved nitrate plus nitrite concentration umol.L-1 Amount of orthophosphate dissolved per unit volume of water, measured as soluble reactive phosphorus in a filtered sample. SRP soluble reactive phosphorus Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "Phosphorus, orthophosphate dissolved": Dissolved orthophosphate phosphorus Dissolved orthophosphate concentration umol.L-1 Amount of methane dissolved per unit volume of water. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "Methane, dissolved": Dissolved Methane (CH4) Dissolved methane concentration umol.L-1 Ratio of the fluorescence emission of dissolved organic matter at 380 nm to that at 430 nm, at an excitation wavelength of 310 nm, higher where the organic matter was recently produced by microbes. BIX Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Huguet et al. (2009), Organic Geochemistry 40:706-719. Distinct from Freshness index (BERVO:0002213), which divides by the maximum emission between 420 and 435 nm; the two are often reported side by side. Biological index 1 Ratio of the spectral slope of the ultraviolet absorption coefficient of dissolved organic matter between 275 and 295 nm to that between 350 and 400 nm, which varies inversely with the average molecular weight of the organic matter. S_R SR Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Helms et al. (2008), Limnology and Oceanography 53:955-969. Spectral slope ratio 1 Net vertical transfer of methane between a surface and the atmosphere, per unit area and time. CH4 flux Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 No ODM2 name. Methane flux nmol.m-2.s-1 umol.m-2.s-1 Net vertical transfer of nitrous oxide between a surface and the atmosphere, per unit area and time. N2O flux Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 No ODM2 name. Nitrous oxide flux nmol.m-2.s-1 umol.m-2.s-1 Relative difference between the carbon-13 to carbon-12 ratio of methane in a sample and that of the Vienna Pee Dee Belemnite standard, which distinguishes methane from acetoclastic and hydrogenotrophic methanogenesis and shows how much has been oxidized. d13C-CH4 delta 13C of methane Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "delta-13C of CH4": Isotope 13C of methane Methane delta carbon-13 [ppth] Area of forest floor covered by a single mat of fungal hyphae binding leaf litter together. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Fungal mat area cm2 Change in the area of a fungal mat over a period, divided by its area at the start and by the length of the period. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 The TRACE fungal mat dataset reports it as percent per week. Fungal mat relative growth rate d-1 Whether a piece of leaf litter has been colonized by litter-mat-forming fungi. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Litter colonization status NA Time from placing a piece of fresh leaf litter in contact with a fungal mat to its colonization by the fungus. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Time to litter colonization d Count of days within a stated period on which precipitation stays below a stated threshold, commonly 1 or 2 mm. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Number of dry days 1 Ratio of the fluorescence emission of dissolved organic matter at 380 nm to the maximum emission between 420 and 435 nm, at an excitation wavelength of 310 nm, an indicator of the share of recently produced organic matter. beta:alpha beta:alpha ratio Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Parlanti et al. (2000), Organic Geochemistry 31:1765-1781. Distinct from Biological index (BERVO:0002203), which divides by the emission at 430 nm alone. Freshness index 1 Isotope delta of carbon-13 relative to carbon-12 in a sample, against Vienna Pee Dee Belemnite. d13C delta 13C Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "Carbon-13, stable isotope ratio delta": Difference in the 13C:12C ratio between the sample and standard (del C 13) Delta carbon-13 [ppth] Isotope delta of deuterium relative to protium in a sample, against Vienna Standard Mean Ocean Water. dD delta 2H delta D Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "Hydrogen-2, stable isotope ratio delta": Difference in the 2H:1H ratio between the sample and standard Delta deuterium [ppth] Isotope delta of nitrogen-15 relative to nitrogen-14 in a sample, against atmospheric nitrogen. d15N delta 15N Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "Nitrogen-15, stable isotope ratio delta": Difference in the 15N:14N ratio between the sample and standard (del N 15) Delta nitrogen-15 [ppth] Isotope delta of oxygen-18 relative to oxygen-16 in a sample, against Vienna Standard Mean Ocean Water, or against Vienna Pee Dee Belemnite for carbonates and carbon dioxide. d18O delta 18O Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "Oxygen-18, stable isotope ratio delta": Difference in the 18O:16O ratio between the sample and standard Delta oxygen-18 [ppth] Isotope delta of carbon-13 in carbon dioxide against Vienna Pee Dee Belemnite, used to separate plant, soil, and fossil fuel sources of carbon dioxide. d13C-CO2 delta 13C of carbon dioxide CO2C13 Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "delta-13C of CO2": Isotope 13C of carbon dioxide. AmeriFlux FP-Standard base name: CO2C13. Carbon dioxide delta carbon-13 [ppth] Isotope delta of carbon-13 in dissolved inorganic carbon against Vienna Pee Dee Belemnite, which records the balance of carbonate mineral weathering, respiration, and gas exchange with the atmosphere. d13C-DIC delta 13C of DIC Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "delta-13C of DIC": Isotope 13C of dissolved inorganic carbon (DIC) Dissolved inorganic carbon delta carbon-13 [ppth] Isotope delta of carbon-13 in ethane against Vienna Pee Dee Belemnite, used with the values for methane, propane, and butane to tell thermogenic from microbial natural gas. delta 13C of ethane Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "delta-13C of C2H6": Isotope 13C of ethane Ethane delta carbon-13 [ppth] Isotope delta of carbon-13 in propane against Vienna Pee Dee Belemnite, used with the values for the other light alkanes to trace the origin and alteration of natural gas. delta 13C of propane Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "delta-13C of C3H8": Isotope 13C of propane Propane delta carbon-13 [ppth] Isotope delta of carbon-13 in butane against Vienna Pee Dee Belemnite, used with the values for the other light alkanes to trace the origin and alteration of natural gas. delta 13C of butane Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "delta-13C of C4H10": Isotope 13C of butane Butane delta carbon-13 [ppth] Isotope delta of oxygen-18 in water against Vienna Standard Mean Ocean Water, which traces the source of water and its history of evaporation and condensation. d18O-H2O delta 18O of water Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "delta-18O of H2O": Isotope 18O of water Water delta oxygen-18 [ppth] Isotope delta of deuterium in water against Vienna Standard Mean Ocean Water, used with water delta oxygen-18 to trace the source of water and its evaporation. dD-H2O delta 2H of water Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "delta-D of H2O": hydrogen isotopes of water Water delta deuterium [ppth] Isotope delta of deuterium in methane against Vienna Standard Mean Ocean Water, which with methane delta carbon-13 distinguishes methanogenic pathways and thermogenic sources. dD-CH4 delta 2H of methane Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 variable name concept "delta-D of CH4": hydrogen isotopes of methane Methane delta deuterium [ppth] Amount of carbon dioxide per amount of moist air, water vapor included, in the air at a measurement point. AmeriFlux FP-Standard base name: CO2. The code is not recorded as a synonym because it is also the symbol or synonym of another BERVO term. AmeriFlux reports the mole fraction in wet air under the bare chemical code and the dry-air mole fraction under the _MIXING_RATIO code. AmeriFlux reports the standard deviation within an averaging period as CO2_SIGMA; BERVO expresses it with the Standard deviation qualifier rather than a separate term. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Carbon dioxide mole fraction in wet air umol.mol-1 Amount of carbon dioxide per amount of dry air, water vapor excluded, in the air at a measurement point. CO2_MIXING_RATIO carbon dioxide dry mole fraction carbon dioxide mixing ratio AmeriFlux FP-Standard base name: CO2_MIXING_RATIO. AmeriFlux calls this a mixing ratio. It is a mole fraction, not the mass mixing ratio used in meteorology. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Carbon dioxide mole fraction in dry air umol.mol-1 Amount of methane per amount of moist air, water vapor included, in the air at a measurement point. AmeriFlux FP-Standard base name: CH4. The code is not recorded as a synonym because it is also the symbol or synonym of another BERVO term. AmeriFlux reports the mole fraction in wet air under the bare chemical code and the dry-air mole fraction under the _MIXING_RATIO code. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Methane mole fraction in wet air nmol.mol-1 Amount of methane per amount of dry air, water vapor excluded, in the air at a measurement point. CH4_MIXING_RATIO methane dry mole fraction methane mixing ratio AmeriFlux FP-Standard base name: CH4_MIXING_RATIO. AmeriFlux calls this a mixing ratio. It is a mole fraction, not the mass mixing ratio used in meteorology. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Methane mole fraction in dry air nmol.mol-1 Amount of nitrous oxide per amount of moist air, water vapor included, in the air at a measurement point. AmeriFlux FP-Standard base name: N2O. The code is not recorded as a synonym because it is also the symbol or synonym of another BERVO term. AmeriFlux reports the mole fraction in wet air under the bare chemical code and the dry-air mole fraction under the _MIXING_RATIO code. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Nitrous oxide mole fraction in wet air nmol.mol-1 Amount of nitrous oxide per amount of dry air, water vapor excluded, in the air at a measurement point. N2O_MIXING_RATIO nitrous oxide dry mole fraction nitrous oxide mixing ratio AmeriFlux FP-Standard base name: N2O_MIXING_RATIO. AmeriFlux calls this a mixing ratio. It is a mole fraction, not the mass mixing ratio used in meteorology. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Nitrous oxide mole fraction in dry air nmol.mol-1 Amount of water vapor per amount of moist air, water vapor included, in the air at a measurement point. AmeriFlux FP-Standard base name: H2O. The code is not recorded as a synonym because it is the chemical formula of water, which belongs on the chemical rather than on a variable. AmeriFlux reports the mole fraction in wet air under the bare chemical code and the dry-air mole fraction under the _MIXING_RATIO code. AmeriFlux reports the standard deviation within an averaging period as H2O_SIGMA; BERVO expresses it with the Standard deviation qualifier rather than a separate term. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Water vapor mole fraction in wet air mmol.mol-1 Amount of water vapor per amount of dry air, water vapor excluded, in the air at a measurement point. H2O_MIXING_RATIO water vapor dry mole fraction water vapor mixing ratio AmeriFlux FP-Standard base name: H2O_MIXING_RATIO. AmeriFlux calls this a mixing ratio. It is a mole fraction, not the mass mixing ratio used in meteorology. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Water vapor mole fraction in dry air mmol.mol-1 Amount of carbon monoxide per amount of moist air, water vapor included, in the air at a measurement point. AmeriFlux FP-Standard base name: CO. The code is not recorded as a synonym because it is also the symbol or synonym of another BERVO term. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Carbon monoxide mole fraction in wet air nmol.mol-1 Amount of nitric oxide per amount of moist air, water vapor included, in the air at a measurement point. AmeriFlux FP-Standard base name: NO. The code is not recorded as a synonym because it is also the symbol or synonym of another BERVO term. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Nitric oxide mole fraction in wet air nmol.mol-1 Amount of nitrogen dioxide per amount of moist air, water vapor included, in the air at a measurement point. AmeriFlux FP-Standard base name: NO2. The code is not recorded as a synonym because it is also the symbol or synonym of another BERVO term. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Nitrogen dioxide mole fraction in wet air nmol.mol-1 Amount of ozone per amount of moist air, water vapor included, in the air at a measurement point. AmeriFlux FP-Standard base name: O3. The code is not recorded as a synonym because it is also the symbol or synonym of another BERVO term. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Ozone mole fraction in wet air nmol.mol-1 Amount of sulfur dioxide per amount of moist air, water vapor included, in the air at a measurement point. AmeriFlux FP-Standard base name: SO2. The code is not recorded as a synonym because it is also the symbol or synonym of another BERVO term. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Sulfur dioxide mole fraction in wet air nmol.mol-1 Vertical turbulent transfer of carbon dioxide through a horizontal plane at the height of an eddy covariance sensor, per unit area and time, without a correction for the change in carbon dioxide stored in the air below the sensor. FC AmeriFlux FP-Standard base name: FC. Adding the matching storage flux gives the exchange at the surface. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Carbon dioxide turbulent flux umol.m-2.s-1 Vertical turbulent transfer of methane through a horizontal plane at the height of an eddy covariance sensor, per unit area and time, without a correction for the change in methane stored in the air below the sensor. FCH4 AmeriFlux FP-Standard base name: FCH4. Adding Methane storage flux (BERVO:0002248) gives Methane flux (BERVO:0002205), the exchange at the surface. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Methane turbulent flux nmol.m-2.s-1 Vertical turbulent transfer of nitrous oxide through a horizontal plane at the height of an eddy covariance sensor, per unit area and time, without a correction for the change in nitrous oxide stored in the air below the sensor. FN2O AmeriFlux FP-Standard base name: FN2O. Adding Nitrous oxide storage flux (BERVO:0002249) gives Nitrous oxide flux (BERVO:0002206), the exchange at the surface. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Nitrous oxide turbulent flux nmol.m-2.s-1 Vertical turbulent transfer of nitric oxide through a horizontal plane at the height of an eddy covariance sensor, per unit area and time, without a correction for the change in nitric oxide stored in the air below the sensor. FNO AmeriFlux FP-Standard base name: FNO. Adding the matching storage flux gives the exchange at the surface. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Nitric oxide turbulent flux nmol.m-2.s-1 Vertical turbulent transfer of nitrogen dioxide through a horizontal plane at the height of an eddy covariance sensor, per unit area and time, without a correction for the change in nitrogen dioxide stored in the air below the sensor. FNO2 AmeriFlux FP-Standard base name: FNO2. Adding the matching storage flux gives the exchange at the surface. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Nitrogen dioxide turbulent flux nmol.m-2.s-1 Vertical turbulent transfer of ozone through a horizontal plane at the height of an eddy covariance sensor, per unit area and time, without a correction for the change in ozone stored in the air below the sensor. FO3 AmeriFlux FP-Standard base name: FO3. Adding the matching storage flux gives the exchange at the surface. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Ozone turbulent flux nmol.m-2.s-1 Vertical turbulent transfer of water vapor through a horizontal plane at the height of an eddy covariance sensor, per unit area and time, without a correction for the change in water vapor stored in the air below the sensor. FH2O AmeriFlux FP-Standard base name: FH2O. AmeriFlux has no storage flux for water vapor in molar units; the storage term appears in energy units as Latent heat storage flux (BERVO:0002254). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Water vapor turbulent flux mmol.m-2.s-1 Vertical turbulent transfer of sensible heat through a horizontal plane at the height of an eddy covariance sensor, per unit area and time, without a correction for the change in heat stored in the air below the sensor. AmeriFlux FP-Standard base name: H. The code is not recorded as a synonym because it is also the symbol or synonym of another BERVO term. Adding Sensible heat storage flux (BERVO:0002253) gives Sensible heat flux (BERVO:0001954), the exchange at the surface. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Sensible heat turbulent flux W.m-2 Vertical turbulent transfer of latent heat through a horizontal plane at the height of an eddy covariance sensor, per unit area and time, without a correction for the change in water vapor stored in the air below the sensor. AmeriFlux FP-Standard base name: LE. The code is not recorded as a synonym because it is also the symbol or synonym of another BERVO term. Adding Latent heat storage flux (BERVO:0002254) gives Latent heat flux (BERVO:0001953), the exchange at the surface. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Latent heat turbulent flux W.m-2 Rate of change of the methane stored in the air column below an eddy covariance sensor, per unit ground area. SCH4 AmeriFlux FP-Standard base name: SCH4. Adding it to Methane turbulent flux (BERVO:0002240) gives Methane flux (BERVO:0002205), the exchange at the surface. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Methane storage flux nmol.m-2.s-1 Rate of change of the nitrous oxide stored in the air column below an eddy covariance sensor, per unit ground area. SN2O AmeriFlux FP-Standard base name: SN2O. Adding it to Nitrous oxide turbulent flux (BERVO:0002241) gives Nitrous oxide flux (BERVO:0002206), the exchange at the surface. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Nitrous oxide storage flux nmol.m-2.s-1 Rate of change of the nitric oxide stored in the air column below an eddy covariance sensor, per unit ground area. SNO AmeriFlux FP-Standard base name: SNO. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Nitric oxide storage flux nmol.m-2.s-1 Rate of change of the nitrogen dioxide stored in the air column below an eddy covariance sensor, per unit ground area. SNO2 AmeriFlux FP-Standard base name: SNO2. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Nitrogen dioxide storage flux nmol.m-2.s-1 Rate of change of the ozone stored in the air column below an eddy covariance sensor, per unit ground area. AmeriFlux FP-Standard base name: SO3. The code is not recorded as a synonym because it reads as the chemical formula of sulfur trioxide. BERVO has no sulfur trioxide term, so this is not a collision with a BERVO label; the code is kept out to avoid misleading a reader. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Ozone storage flux nmol.m-2.s-1 Rate of change of the sensible heat stored in the air column below an eddy covariance sensor, per unit ground area. SH AmeriFlux FP-Standard base name: SH. Adding it to Sensible heat turbulent flux (BERVO:0002246) gives Sensible heat flux (BERVO:0001954), the exchange at the surface. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Sensible heat storage flux W.m-2 Rate of change of the latent heat, held as water vapor, stored in the air column below an eddy covariance sensor, per unit ground area. SLE AmeriFlux FP-Standard base name: SLE. Adding it to Latent heat turbulent flux (BERVO:0002247) gives Latent heat flux (BERVO:0001953), the exchange at the surface. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Latent heat storage flux W.m-2 Rate of change of the heat stored in the plant biomass between the ground and an eddy covariance sensor, per unit ground area. AmeriFlux FP-Standard base name: SB. The code is not recorded as a synonym because it is also the symbol or synonym of another BERVO term. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Biomass heat storage flux W.m-2 Rate of change of the heat stored in the soil between the ground surface and the depth of a soil heat flux plate, per unit ground area. SG AmeriFlux FP-Standard base name: SG. Adding it to the flux measured at the plate gives the ground heat flux at the surface. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Soil heat storage flux W.m-2 Rate of heat transfer by conduction through the soil at the depth of a soil heat flux plate, per unit area. G AmeriFlux FP-Standard base name: G. AmeriFlux describes G only as soil heat flux. Because it reports the storage above the plate separately (SG), G is read here as the flux at the plate, not at the surface; a site that reports a surface value under G is reporting Ground heat flux (BERVO:0001952). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Soil heat flux at measurement depth W.m-2 Net transfer of carbon dioxide between an ecosystem and the atmosphere per unit ground area and time, the balance of uptake by photosynthesis and release by respiration and other sources. NEE net ecosystem exchange of carbon dioxide AmeriFlux FP-Standard base name: NEE. Flux towers measure it as the turbulent flux at sensor height, Carbon dioxide turbulent flux (BERVO:0002239), plus the change in storage below it, Carbon dioxide storage flux (BERVO:0001944). Distinct from Net ecosystem carbon dioxide exchange (BERVO:0000326), which is EcoSIM's grid-cell total in g.h-1/{grid} and sits beneath this term as an additional parent. Flux networks report NEE positive when carbon dioxide moves to the atmosphere. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Net ecosystem exchange umol.m-2.s-1 Upwind distance from a flux measurement point to a reference location within its flux footprint, the area of surface whose exchange contributes to the measured flux. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 General term for the AmeriFlux FETCH_ variables. Flux footprint distance m Upwind distance from a flux measurement point within which 70 percent of the crosswind-integrated flux footprint lies. FETCH_70 AmeriFlux FP-Standard base name: FETCH_70. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Flux footprint 70 percent distance m Upwind distance from a flux measurement point within which 80 percent of the crosswind-integrated flux footprint lies. FETCH_80 AmeriFlux FP-Standard base name: FETCH_80. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Flux footprint 80 percent distance m Upwind distance from a flux measurement point within which 90 percent of the crosswind-integrated flux footprint lies. FETCH_90 AmeriFlux FP-Standard base name: FETCH_90. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Flux footprint 90 percent distance m Upwind distance from a flux measurement point at which the crosswind-integrated flux footprint contributes most to the measured flux. FETCH_MAX AmeriFlux FP-Standard base name: FETCH_MAX. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Flux footprint peak distance m Categorical code marking whether the wind in an averaging period came from a direction for which a site's flux measurements are kept or discarded. FETCH_FILTER AmeriFlux FP-Standard base name: FETCH_FILTER. AmeriFlux codes 1 for kept and 0 for discarded. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Flux footprint wind direction flag NA Categorical quality grade for an eddy covariance flux in an averaging period, combining a test of the stationarity of the turbulent signal with a comparison of the measured integral turbulence characteristics against values from similarity theory. FCH4_SSITC_TEST FC_SSITC_TEST FN2O_SSITC_TEST FNO2_SSITC_TEST FNO_SSITC_TEST FO3_SSITC_TEST H_SSITC_TEST LE_SSITC_TEST SSITC flag TAU_SSITC_TEST AmeriFlux FP-Standard base names: FC_SSITC_TEST, FCH4_SSITC_TEST, FN2O_SSITC_TEST, FNO_SSITC_TEST, FNO2_SSITC_TEST, FO3_SSITC_TEST, H_SSITC_TEST, LE_SSITC_TEST and TAU_SSITC_TEST, one per flux. Grades 0, 1 and 2 follow Foken et al. (2004), based on the tests of Foken and Wichura (1996). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Steady state and integral turbulence characteristics test flag NA Height above the ground of the top of the planetary boundary layer, the lowest part of the atmosphere directly influenced by the surface through turbulent mixing. PBLH mixing layer height AmeriFlux FP-Standard base name: PBLH. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Planetary boundary layer height m Air temperature derived from the speed of sound measured by a sonic anemometer, close to the virtual temperature because the speed of sound depends on humidity. T_SONIC AmeriFlux FP-Standard base name: T_SONIC. AmeriFlux reports the standard deviation within an averaging period as T_SONIC_SIGMA; BERVO expresses it with the Standard deviation qualifier rather than a separate term. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Sonic temperature Cel Length scale of atmospheric surface-layer stability whose magnitude is the height above the surface at which buoyant production of turbulence equals its production by wind shear, negative in unstable and positive in stable surface layers. MO_LENGTH Obukhov length AmeriFlux FP-Standard base name: MO_LENGTH. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Monin-Obukhov length m Ratio of a measurement height above the zero-plane displacement to the Monin-Obukhov length, negative in unstable and positive in stable surface layers. ZL atmospheric stability parameter z/L AmeriFlux FP-Standard base name: ZL. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Monin-Obukhov stability parameter 1 Component of the wind velocity along the mean wind direction, after rotation of the anemometer coordinate system into the mean wind. AmeriFlux reports only its standard deviation within an averaging period, as U_SIGMA; BERVO expresses that with the Standard deviation qualifier on this term rather than a separate term. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Streamwise wind velocity m.s-1 Component of the wind velocity horizontal and perpendicular to the mean wind direction, after rotation of the anemometer coordinate system into the mean wind. AmeriFlux reports only its standard deviation within an averaging period, as V_SIGMA; BERVO expresses that with the Standard deviation qualifier on this term rather than a separate term. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Crosswind velocity m.s-1 Component of the wind velocity perpendicular to the mean streamline, after rotation of the anemometer coordinate system. AmeriFlux reports only its standard deviation within an averaging period, as W_SIGMA; BERVO expresses that with the Standard deviation qualifier on this term rather than a separate term. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Vertical wind velocity m.s-1 Depth of liquid precipitation collected over a period. P_RAIN AmeriFlux FP-Standard base name: P_RAIN. Distinct from Rainfall measurement (BERVO:0001421), the rainfall forcing of EcoSIM and ATS as a volume per grid cell per hour or a depth per second, and from Rainfall rate (BERVO:0001909), the depth per unit time; this term is the depth accumulated over a reporting period. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Rainfall amount mm Depth of liquid water equivalent of the solid precipitation falling over a period. P_SNOW AmeriFlux FP-Standard base name: P_SNOW. AmeriFlux gives it in mm without saying whether snow depth or water equivalent is meant; it is taken here as water equivalent, as its parent Precipitation amount is, because AmeriFlux reports snow depth separately as D_SNOW (Snowpack depth, BERVO:0001572). Distinct from Snowfall measurement (BERVO:0001422), the snowfall forcing of EcoSIM and ATS as a rate; this term is the water equivalent accumulated over a reporting period. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Snowfall amount mm Depth of precipitation that is intercepted by a canopy and drains to the ground along branches and stems. AmeriFlux FP-Standard base name: STEMFLOW. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Stemflow mm Depth of water that leaves an area over the land surface or through the soil in a period rather than infiltrating or evaporating. AmeriFlux FP-Standard base name: RUNOFF. The code is not recorded as a synonym because it is also the label, symbol or synonym of another BERVO term. AmeriFlux does not say whether surface runoff or total runoff is meant. Distinct from Total surface runoff (BERVO:0000316) and Soil surface runoff water (BERVO:0001816), EcoSIM volumes per grid cell; this term is a depth over a reporting period. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Runoff depth mm Potential energy of water in soil relative to pure free water at the same elevation and pressure, per unit volume, mostly from matric and osmotic effects. PFCURVE_MP SWP AmeriFlux FP-Standard base name: SWP. AmeriFlux BADM variable name: PFCURVE_MP. PFCURVE_MP is the matric potential of a point on a water retention curve, paired with PFCURVE_SWC. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Soil water potential kPa Ratio of reflected to incoming shortwave radiation for a land surface viewed from above, vegetation and ground together. ALB AmeriFlux FP-Standard base name: ALB. AmeriFlux reports it in percent. Distinct from Surface albedo (BERVO:0001507), which is EcoSIM's ground-surface albedo, and Canopy shortwave albedo (BERVO:0000604). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Ecosystem shortwave albedo 1 Photon flux in the 400 to 700 nm waveband absorbed by a canopy, per unit ground area and time. APAR absorbed PAR AmeriFlux FP-Standard base name: APAR. The EcoSIM per-plant-type Canopy absorbed photosynthetically active radiation (BERVO:0000571) sits beneath this term as an additional parent. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Absorbed photosynthetic photon flux density umol.m-2.s-1 Fraction of the incoming radiation in the 400 to 700 nm waveband that a canopy absorbs. FAPAR fPAR AmeriFlux FP-Standard base name: FAPAR. AmeriFlux reports it in percent. The EcoSIM per-plant-type Fraction of incoming photosynthetically active radiation absorbed by canopy (BERVO:0000572) sits beneath this term as an additional parent. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Fraction of absorbed photosynthetically active radiation 1 Fraction of the incoming radiation in the 400 to 700 nm waveband that a canopy intercepts, whether absorbed or reflected. FIPAR AmeriFlux FP-Standard base name: FIPAR. AmeriFlux reports it in percent. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Fraction of intercepted photosynthetically active radiation 1 Shortwave radiation arriving from above at a point beneath a canopy, the part of the incoming solar radiation transmitted through or scattered by the canopy. SW_BC_IN AmeriFlux FP-Standard base name: SW_BC_IN. Distinct from Shortwave radiation incident on ground surface (BERVO:0000576), the EcoSIM grid-cell energy input in MJ.h-1; this term is the flux density a radiometer measures below the canopy. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Below-canopy incoming shortwave radiation W.m-2 Shortwave radiation reflected upward from the ground and understory, measured beneath a canopy. SW_BC_OUT AmeriFlux FP-Standard base name: SW_BC_OUT. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Below-canopy outgoing shortwave radiation W.m-2 Longwave radiation arriving from above at a point beneath a canopy, emitted by the canopy and transmitted from the sky. LW_BC_IN AmeriFlux FP-Standard base name: LW_BC_IN. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Below-canopy incoming longwave radiation W.m-2 Longwave radiation emitted and reflected upward by the ground and understory, measured beneath a canopy. LW_BC_OUT AmeriFlux FP-Standard base name: LW_BC_OUT. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Below-canopy outgoing longwave radiation W.m-2 Photon flux in the 400 to 700 nm waveband arriving from above at a point beneath a canopy, per unit area and time. PPFD_BC_IN AmeriFlux FP-Standard base name: PPFD_BC_IN. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Below-canopy incoming photosynthetic photon flux density umol.m-2.s-1 Photon flux in the 400 to 700 nm waveband reflected upward from the ground and understory, measured beneath a canopy, per unit area and time. PPFD_BC_OUT AmeriFlux FP-Standard base name: PPFD_BC_OUT. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Below-canopy outgoing photosynthetic photon flux density umol.m-2.s-1 Radiant flux arriving from the whole sky hemisphere on a horizontal surface, per unit area and per unit wavelength, within a spectral band. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 General term for the AmeriFlux SPEC_*_IN variables. Incoming spectral irradiance W.m-2.nm-1 Radiant flux leaving a surface toward a sensor, per unit area, per unit solid angle and per unit wavelength, within a spectral band. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 General term for the AmeriFlux SPEC_*_OUT variables. Outgoing spectral radiance W.m-2.sr-1.nm-1 Reflectance of a land surface within a spectral band, from paired measurements of incoming irradiance and outgoing radiance. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 General term for the AmeriFlux SPEC_*_REFL variables. Surface spectral reflectance 1 Incoming spectral irradiance on a horizontal surface in the near-infrared. SPEC_NIR_IN AmeriFlux FP-Standard base name: SPEC_NIR_IN. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Incoming near-infrared spectral irradiance W.m-2.nm-1 Spectral radiance leaving a land surface toward a downward-looking sensor in the near-infrared. SPEC_NIR_OUT AmeriFlux FP-Standard base name: SPEC_NIR_OUT. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Outgoing near-infrared spectral radiance W.m-2.sr-1.nm-1 Reflectance of a land surface in the near-infrared. SPEC_NIR_REFL AmeriFlux FP-Standard base name: SPEC_NIR_REFL. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Near-infrared spectral reflectance 1 Incoming spectral irradiance on a horizontal surface in the red. SPEC_RED_IN AmeriFlux FP-Standard base name: SPEC_RED_IN. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Incoming red spectral irradiance W.m-2.nm-1 Spectral radiance leaving a land surface toward a downward-looking sensor in the red. SPEC_RED_OUT AmeriFlux FP-Standard base name: SPEC_RED_OUT. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Outgoing red spectral radiance W.m-2.sr-1.nm-1 Reflectance of a land surface in the red. SPEC_RED_REFL AmeriFlux FP-Standard base name: SPEC_RED_REFL. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Red spectral reflectance 1 Incoming spectral irradiance on a horizontal surface in the photochemical reflectance index reference band. SPEC_PRI_REF_IN AmeriFlux FP-Standard base name: SPEC_PRI_REF_IN. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Incoming photochemical reflectance index reference band spectral irradiance W.m-2.nm-1 Spectral radiance leaving a land surface toward a downward-looking sensor in the photochemical reflectance index reference band. SPEC_PRI_REF_OUT AmeriFlux FP-Standard base name: SPEC_PRI_REF_OUT. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Outgoing photochemical reflectance index reference band spectral radiance W.m-2.sr-1.nm-1 Reflectance of a land surface in the photochemical reflectance index reference band. SPEC_PRI_REF_REFL AmeriFlux FP-Standard base name: SPEC_PRI_REF_REFL. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Photochemical reflectance index reference band spectral reflectance 1 Incoming spectral irradiance on a horizontal surface in the photochemical reflectance index target band. SPEC_PRI_TGT_IN AmeriFlux FP-Standard base name: SPEC_PRI_TGT_IN. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Incoming photochemical reflectance index target band spectral irradiance W.m-2.nm-1 Spectral radiance leaving a land surface toward a downward-looking sensor in the photochemical reflectance index target band. SPEC_PRI_TGT_OUT AmeriFlux FP-Standard base name: SPEC_PRI_TGT_OUT. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Outgoing photochemical reflectance index target band spectral radiance W.m-2.sr-1.nm-1 Reflectance of a land surface in the photochemical reflectance index target band. SPEC_PRI_TGT_REFL AmeriFlux FP-Standard base name: SPEC_PRI_TGT_REFL. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Photochemical reflectance index target band spectral reflectance 1 Spectral vegetation index from near-infrared, red and blue reflectances that corrects for soil background and atmospheric scattering and saturates less than the normalized difference vegetation index over dense canopies. EVI AmeriFlux FP-Standard base name: EVI. As formulated by Huete et al. (2002), Remote Sensing of Environment 83:195-213. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Enhanced vegetation index 1 Spectral vegetation index from the reciprocals of the reflectances near 510 nm and near 550 or 700 nm, sensitive to the carotenoid content of leaves. MCRI AmeriFlux FP-Standard base name: MCRI. AmeriFlux cites Gitelson et al. (2002), Photochemistry and Photobiology 75:272-281, who define CRI550 from 510 and 550 nm and CRI700 from 510 and 700 nm. A modified form multiplies either by near-infrared reflectance (Gitelson et al., 2006, Geophysical Research Letters 33:L11402). AmeriFlux does not say which form its MCRI is, so this term covers them all. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Carotenoid reflectance index 1 Spectral vegetation index from reflectances in three bands across the red edge, defined for the MERIS sensor and sensitive to canopy chlorophyll content. MTCI AmeriFlux FP-Standard base name: MTCI. Defined by Dash and Curran (2004), International Journal of Remote Sensing 25:5403-5413. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 MERIS terrestrial chlorophyll index 1 Spectral vegetation index equal to the product of the normalized difference vegetation index and the near-infrared reflectance, the share of near-infrared reflectance attributable to vegetation. NIRV AmeriFlux FP-Standard base name: NIRV. Defined by Badgley et al. (2017), Science Advances 3:e1602244. AmeriFlux lists NIRV in W m-2 sr-1 nm-1, the unit of the radiance-based variant (the normalized difference vegetation index times near-infrared radiance). The index as Badgley et al. (2017) define it, and as this term defines it, is dimensionless. Check a site's units before mapping its NIRV here. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Near-infrared reflectance of vegetation 1 Spectral vegetation index from reflectances near 531 nm and 570 nm, sensitive to the xanthophyll cycle and so to the light-use efficiency of photosynthesis. PRI AmeriFlux FP-Standard base name: PRI. Defined by Gamon et al. (1992), Remote Sensing of Environment 41:35-44. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Photochemical reflectance index 1 Spectral vegetation index from the ratio of near-infrared to red-edge reflectance, minus one, sensitive to canopy chlorophyll content. REDCI AmeriFlux FP-Standard base name: REDCI. Defined by Gitelson et al. (2003), Journal of Plant Physiology 160:271-282. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Red edge chlorophyll index 1 Wavelength of the steepest rise in vegetation reflectance between the red and near-infrared regions, which shifts toward longer wavelengths as chlorophyll content increases. REP AmeriFlux FP-Standard base name: REP. AmeriFlux cites Dash and Curran (2004), International Journal of Remote Sensing 25:5403-5413, who used it; the red edge position was introduced by Horler et al. (1983), International Journal of Remote Sensing 4:273-288. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Red edge position nm Spectral vegetation index equal to the ratio of near-infrared to red reflectance. simple ratio AmeriFlux FP-Standard base name: SR. The code is not recorded as a synonym because it is also the label, symbol or synonym of another BERVO term. Defined by Jordan (1969), Ecology 50:663-666. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Simple ratio vegetation index 1 Spectral vegetation index from reflectances at 550, 670 and 700 nm that measures the depth of chlorophyll absorption at 670 nm relative to the green and red-edge reflectance. TCARI AmeriFlux FP-Standard base name: TCARI. Defined by Haboudane et al. (2002), Remote Sensing of Environment 81:416-426. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Transformed chlorophyll absorption in reflectance index 1 Temperature of a body of water or of water at a measurement point in it. TW AmeriFlux FP-Standard base name: TW. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 3 Water temperature Cel Ability of water to conduct an electric current, which rises with the concentration of dissolved ions. COND_WATER AmeriFlux FP-Standard base name: COND_WATER. AmeriFlux does not say whether values are compensated to 25 degrees Celsius; compensated values are Specific conductance (BERVO:8000426). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 3 Water electrical conductivity uS.cm-1 Amount of oxygen dissolved per unit volume of water. DO AmeriFlux FP-Standard base name: DO. Distinct from Dissolved oxygen saturation (BERVO:0002110), a fraction of the saturation value. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 3 Dissolved oxygen concentration umol.L-1 Mole fraction of methane in a gas phase brought to equilibrium with a water sample, a measure of the methane dissolved in the water expressed as the equivalent atmospheric mole fraction. PCH4 AmeriFlux FP-Standard base name: PCH4. AmeriFlux describes it only as dissolved methane in water; the unit, mol per mol, shows it is an equilibrium mole fraction rather than a concentration. Distinct from Dissolved methane concentration (BERVO:0002202), the amount per unit volume of water. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 3 Dissolved methane equilibrium mole fraction nmol.mol-1 Mole fraction of carbon dioxide in a gas phase brought to equilibrium with a water sample, a measure of the carbon dioxide dissolved in the water expressed as the equivalent atmospheric mole fraction. PCO2 AmeriFlux FP-Standard base name: PCO2. AmeriFlux describes it only as dissolved carbon dioxide in water; the unit, mol per mol, shows it is an equilibrium mole fraction rather than a concentration. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 3 Dissolved carbon dioxide equilibrium mole fraction umol.mol-1 Mole fraction of nitrous oxide in a gas phase brought to equilibrium with a water sample, a measure of the nitrous oxide dissolved in the water expressed as the equivalent atmospheric mole fraction. PN2O AmeriFlux FP-Standard base name: PN2O. AmeriFlux describes it only as dissolved nitrous oxide in water; the unit, mol per mol, shows it is an equilibrium mole fraction rather than a concentration. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 3 Dissolved nitrous oxide equilibrium mole fraction nmol.mol-1 Photon flux in the 400 to 700 nm waveband arriving from above at a point beneath a water surface, per unit area and time. PPFD_UW_IN AmeriFlux FP-Standard base name: PPFD_UW_IN. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 3 Underwater incoming photosynthetic photon flux density umol.m-2.s-1 Rate of water movement through the conducting xylem of a stem, per unit cross-sectional area of sapwood. SAP_FLOW sap flux AmeriFlux FP-Standard base name: SAP_FLOW. AmeriFlux does not state the area its unit refers to; sap flux density is conventionally per unit sapwood area. Distinct from Sap flow (BERVO:0001951), the whole-plant rate. If AmeriFlux turns out to mean per unit ground area, SAP_FLOW is a different quantity and needs its own term; the definition should not be widened to cover it. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 3 Sap flux density mmol{H2O}.m-2.s-1 Temperature difference between a heated and an unheated probe inserted in the sapwood of a stem, the raw signal from which thermal dissipation sensors derive sap flux density. SAP_DT AmeriFlux FP-Standard base name: SAP_DT. AmeriFlux reports it in degrees Celsius; as a difference it is the same in kelvin. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 3 Sap flow probe temperature difference K Temperature of the trunk of a tree, at its surface or within its wood. T_BOLE stem temperature AmeriFlux FP-Standard base name: T_BOLE. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 3 Bole temperature Cel Surface temperature of a canopy, and of any ground visible through it, derived from the longwave radiation measured by an infrared radiometer looking down on it. T_CANOPY AmeriFlux FP-Standard base name: T_CANOPY. AmeriFlux defines it as the temperature of the canopy and/or the surface underneath the sensor, so a value can include the ground where the canopy is open. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 3 Radiometric canopy surface temperature Cel Shortwave radiation that would arrive on a horizontal surface at the top of the atmosphere above a site, computed from the solar geometry for the time and location. SW_IN_POT extraterrestrial radiation top-of-atmosphere radiation Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 FLUXNET FULLSET variable: SW_IN_POT. Placed under Incoming radiation, not Incoming shortwave radiation, because it is computed for the top of the atmosphere rather than measured at the land surface; Incoming radiation is the nearest parent that does not place it at the land surface. Potential incoming shortwave radiation W.m-2 Friction velocity below which turbulent mixing at a flux site is judged too weak for eddy covariance fluxes measured at night to represent the exchange with the surface. u* threshold ustar threshold Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 FLUXNET FULLSET does not report the threshold itself; its constant and variable forms (_CUT, _VUT) and the percentile used (_USTAR50) qualify the NEE, GPP and RECO variables. How it was chosen is recorded by the concepts Constant friction velocity threshold (BERVO:8001097) and Variable friction velocity threshold (BERVO:8001098). Friction velocity threshold m.s-1 Ratio of the available energy, net radiation less the ground heat flux, to the sum of the measured sensible and latent heat fluxes, by which those fluxes are scaled to close the surface energy balance. EBC correction factor Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 FLUXNET FULLSET reports the number of values used to compute it (EBC_CF_N) and the method used (EBC_CF_METHOD), and applies it in H_CORR and LE_CORR. Placed under Land surface variable, the grouping for properties that control the exchange of energy and water at the surface, because it is a ratio rather than a flux. Energy balance closure correction factor 1 Categorical code marking whether an averaging period falls in the nighttime, judged by whether the potential incoming shortwave radiation is zero. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 FLUXNET FULLSET variable: NIGHT. The code is not recorded as a synonym because it is also the label, symbol or synonym of another BERVO term. Nighttime flag NA Angular distance of a location, such as a measurement site, north or south of the equator. LOCATION_LAT AmeriFlux BADM variable name: LOCATION_LAT. AmeriFlux reports it in decimal degrees on the WGS84 datum. The EcoSIM grid-cell Latitude measurement (BERVO:0000991) sits beneath this term as an additional parent. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Site latitude deg Angular distance of a location, such as a measurement site, east or west of the prime meridian. LOCATION_LONG AmeriFlux BADM variable name: LOCATION_LONG. AmeriFlux reports it in decimal degrees on the WGS84 datum. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Site longitude deg Categorical direction, as a compass point, that the sloping land surface of a site faces, or flat where it faces none. AmeriFlux BADM variable name: ASPECT. The code is not recorded as a synonym because it is also the label, symbol or synonym of another BERVO term. Values are the Compass point concepts and Flat terrain. Distinct from Aspect (BERVO:0000685), in degrees. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Aspect class NA Categorical class of the slope or relief of the land surface at a site. AmeriFlux BADM variable name: TERRAIN. The code is not recorded as a synonym because it is also the label, symbol or synonym of another BERVO term. Values are the Terrain class concepts. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Terrain type NA Compass point from which the wind blows most often at a site. WIND_DIRECTION AmeriFlux BADM variable name: WIND_DIRECTION. Values are the Compass point concepts. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Prevailing wind direction NA Distance upwind from a measurement site, in the prevailing wind direction, over which the ecosystem stays the same. SURFACE_HOMOGENEITY AmeriFlux BADM variable name: SURFACE_HOMOGENEITY. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Surface homogeneity distance m Number of days in a year on which the ground at a site is covered by snow. SITE_SNOW_COVER_DAYS AmeriFlux BADM variable name: SITE_SNOW_COVER_DAYS. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Annual snow cover duration d Class of the Köppen climate classification that the long-term climate of a site falls in. CLIMATE_KOEPPEN AmeriFlux BADM variable name: CLIMATE_KOEPPEN. Values are the Köppen climate class concepts. The EcoSIM Köppen climate zone flag (BERVO:0000235) sits beneath this term as an additional parent. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Köppen climate classification NA Class of the IGBP land cover classification that the land cover of a site falls in. IGBP AmeriFlux BADM variable name: IGBP. Values are the IGBP land cover class concepts. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 IGBP land cover type NA Time since the establishment of the standing live trees of a stand, usually that of its dominant cohort. SA AmeriFlux BADM variable name: SA. AmeriFlux reports the maximum tree age as SA_MAX; BERVO expresses it with the Maximum qualifier on this term. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Stand age a One-sided area of the green, photosynthetically active parts of plants, leaves and green stems together, per unit horizontal ground area. GAI AmeriFlux reports it under LAI with LAI_TYPE GAI. AmeriFlux BADM LAI_TYPE value: GAI. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Green area index m2.m-2 Dry mass, or carbon mass, of plant material that has fallen or become detached from plants, per unit ground area. LITTER_DEBRIS AmeriFlux BADM variable name: LITTER_DEBRIS. Legacy BADM variables mapped here, with the variant in contexts or qualifiers: AG_LIT_BIOMASS, STUMP_MASS, WD_BIOMASS_CRS, WD_BIOMASS_FINE. Fine litter, fine and coarse woody debris, and stumps are told apart by organ in contexts. Stumps, the rooted remains of trees cut or broken off, are counted here as woody debris, as forest inventories of coarse woody debris usually count them; snags, still standing, are Vegetation biomass (BERVO:0001970). The legacy BADM list gives no definition of STUMP_MASS to settle this. BADM reports it in kg of dry mass or g of carbon per square metre. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Litter and debris mass g.m-2 g{C}.m-2 Mass of carbon per unit dry mass of a plant tissue or of whole plant material. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Legacy BADM variables mapped here, with the variant in contexts or qualifiers: BIOMASS_C, AG_LIT_C, ROOT_C. Organ and status go in contexts; litter is Dead vegetation. Plant tissue carbon content g{C}.kg-1 Mass of nitrogen per unit dry mass of a plant tissue or of whole plant material. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Legacy BADM variables mapped here, with the variant in contexts or qualifiers: BIOMASS_N, AG_LIT_N, ROOT_N. Organ and status go in contexts; litter is Dead vegetation. Plant tissue nitrogen content g{N}.kg-1 Rate of production of new aboveground plant mass, net of autotrophic respiration, per unit ground area, usually summed over a year. ANPP Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Legacy BADM variables mapped here, with the variant in contexts or qualifiers: AG_PROD_TREE, AG_PROD_SHRUB, AG_PROD_CROP, AG_PROD_OTHER. The vegetation type goes in contexts. Aboveground net primary production g.m-2.a-1 g{C}.m-2.a-1 Rate of production of new root and other belowground plant mass, net of autotrophic respiration, per unit ground area, usually summed over a year. BNPP Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Legacy BADM variables mapped here, with the variant in contexts or qualifiers: ROOT_PROD_TOT, ROOT_PROD_FINE, ROOT_PROD_CRS. Fine and coarse roots go in contexts. Belowground net primary production g.m-2.a-1 g{C}.m-2.a-1 Mass of plant material falling to the ground per unit ground area and time, usually summed over a year. AG_LIT_PROD_TOT Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Legacy BADM variable name: AG_LIT_PROD_TOT. Litterfall rate g.m-2.a-1 g{C}.m-2.a-1 Mass of dead root and other belowground plant material added to the soil per unit ground area and time. BG_LIT_PROD Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Legacy BADM variable name: BG_LIT_PROD. Belowground litter production g.m-2.a-1 g{C}.m-2.a-1 Mass of dead wood falling to the ground per unit ground area and time. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Legacy BADM variables mapped here, with the variant in contexts or qualifiers: WD_PROD_CRS, WD_PROD_FINE. Fine and coarse woody debris go in contexts. Woody debris production g.m-2.a-1 g{C}.m-2.a-1 Increase in the diameter of a tree stem at breast height over a stated period. STEM_INCR Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Legacy BADM variable name: STEM_INCR. STEM_INCR_DIAM and STEM_INCR_NUM record the sampled trees. Stem diameter increment cm Net accumulation of organic carbon in an ecosystem per unit ground area and time, gross primary production less ecosystem respiration, usually summed over a year. NEP Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Legacy BADM variable name: NEP. Estimated biometrically or from eddy covariance fluxes. Close in magnitude and opposite in sign to Net ecosystem exchange (BERVO:0002258) summed over the same period, where carbon leaves the ecosystem only as carbon dioxide. Net ecosystem production g{C}.m-2.a-1 Mass of nitrogen deposited from the atmosphere onto a surface per unit area and time. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 General term for the BADM N_DEP_ variables. Nitrogen deposition g{N}.m-2.a-1 Mass of nitrogen deposited in precipitation, fog or cloud water per unit area and time. N_DEP_WET AmeriFlux BADM variable name: N_DEP_WET. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Wet nitrogen deposition g{N}.m-2.a-1 Mass of nitrogen deposited as gases and particles, outside precipitation, per unit area and time. N_DEP_DRY AmeriFlux BADM variable name: N_DEP_DRY. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Dry nitrogen deposition g{N}.m-2.a-1 Depth below the soil surface of the active roots of a plant community, reported as a statistic such as the mean or maximum. AmeriFlux BADM variable name: ROOT_DEPTH. The code is not recorded as a synonym because it is also the label, symbol or synonym of another BERVO term. Distinct from Rootable soil depth (BERVO:0002173), the depth roots could reach before an obstacle. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Rooting depth cm Date on which a phenological event, such as bud break or leaf senescence, occurs at a site. PHEN_EVENT_DATE AmeriFlux BADM variable name: PHEN_EVENT_DATE. PHEN_EVENT_TYPE names the event, one of the Phenological progress concepts; PHEN_EVENT_STATUS (Start, Peak, End) goes in qualifiers. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Phenological event date NA pH of a suspension of soil in a salt solution, such as calcium chloride or potassium chloride, which displaces exchangeable hydrogen and aluminium ions. SOIL_CHEM_PH_SALT AmeriFlux BADM variable name: SOIL_CHEM_PH_SALT. Distinct from Soil pH in water (BERVO:0002160). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Soil pH in salt solution 1 Mass of phosphorus in all forms, organic and inorganic, per unit mass of dry soil. SOIL_CHEM_P AmeriFlux BADM variable name: SOIL_CHEM_P. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Soil total phosphorus content g{P}.kg-1 Thickness of the organic horizon at the top of a soil profile, measured from the top of the litter layer. O horizon thickness SOIL_DEPTH_ORG AmeriFlux BADM variable name: SOIL_DEPTH_ORG. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Organic horizon thickness cm Mass of organic carbon in the soil per unit ground area, summed over a stated depth interval. SOIL_STOCK_C_ORG AmeriFlux BADM variable name: SOIL_STOCK_C_ORG. SOIL_STOCK_PROFILE_MIN and SOIL_STOCK_PROFILE_MAX record the depth interval. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Soil organic carbon stock g{C}.m-2 Mass of nitrogen in all forms in the soil per unit ground area, summed over a stated depth interval. SOIL_STOCK_N_TOT AmeriFlux BADM variable name: SOIL_STOCK_N_TOT. SOIL_STOCK_PROFILE_MIN and SOIL_STOCK_PROFILE_MAX record the depth interval. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Soil total nitrogen stock g{N}.m-2 Mass of ammonium in the soil per unit ground area, summed over a stated depth interval. SOIL_STOCK_NH4 AmeriFlux BADM variable name: SOIL_STOCK_NH4. SOIL_STOCK_PROFILE_MIN and SOIL_STOCK_PROFILE_MAX record the depth interval. BADM gives the unit as g NH4 m-2, the mass of the ion rather than of its nitrogen. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Soil ammonium stock g{NH4}.m-2 Mass of nitrate in the soil per unit ground area, summed over a stated depth interval. SOIL_STOCK_NO3 AmeriFlux BADM variable name: SOIL_STOCK_NO3. SOIL_STOCK_PROFILE_MIN and SOIL_STOCK_PROFILE_MAX record the depth interval. BADM gives the unit as g NO3 m-2, the mass of the ion rather than of its nitrogen. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Soil nitrate stock g{NO3}.m-2 Mass of potassium in the soil per unit ground area, summed over a stated depth interval. SOIL_STOCK_K AmeriFlux BADM variable name: SOIL_STOCK_K. SOIL_STOCK_PROFILE_MIN and SOIL_STOCK_PROFILE_MAX record the depth interval. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Soil potassium stock g{K}.m-2 Mass of phosphorus in the soil per unit ground area, summed over a stated depth interval. SOIL_STOCK_P AmeriFlux BADM variable name: SOIL_STOCK_P. SOIL_STOCK_PROFILE_MIN and SOIL_STOCK_PROFILE_MAX record the depth interval. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Soil phosphorus stock g{P}.m-2 Class of the disturbance or management that most affects a measurement site during its years of measurement. DOM_DIST_MGMT AmeriFlux BADM variable name: DOM_DIST_MGMT. Values are the Disturbance and Land management concepts named by the BADM list DIST_MGMT. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Dominant disturbance or management type NA Class of a disturbance or management event at a measurement site, such as a fire, a harvest, a fertilizer application or a storm. DM_AGRICULTURE DM_ENCROACH DM_EXT_WEATHER DM_FERT_M DM_FERT_O DM_FORESTRY DM_GENERAL DM_GRAZE DM_INS_PATH DM_PESTICIDE DM_PLANTING DM_TILL DM_WATER AmeriFlux BADM variable names: DM_AGRICULTURE, DM_ENCROACH, DM_EXT_WEATHER, DM_FERT_M, DM_FERT_O, DM_FORESTRY, DM_GENERAL, DM_GRAZE, DM_INS_PATH, DM_PESTICIDE, DM_PLANTING, DM_TILL, DM_WATER. Values are the Disturbance and Land management concepts under each list. DM_FIRE maps to Fire type (BERVO:0002133). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Disturbance or management event type NA Fraction of the flux footprint area of a site affected by a disturbance or management event. DM_SURF AmeriFlux BADM variable name: DM_SURF. AmeriFlux reports it in percent. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Disturbed footprint fraction 1 The flow of water over the ground surface when soil is saturated, impermeable, or precipitation intensity exceeds infiltration capacity. This hydrological process is fundamental for understanding water balance, erosion patterns, flood generation, and downstream water resource availability in watershed and ecosystem management applications. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Runoff NA An essential nutrient element required for plant growth, development, and energy transfer processes in all living organisms. This chemical element is often the limiting nutrient in terrestrial and aquatic ecosystems, controlling primary productivity, biogeochemical cycling, and ecosystem responses to environmental change and management practices. P Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "P": Expressed as phosphorus Phosphorus NA The primary photosynthetic organ of a plant that captures light energy and facilitates gas exchange between the plant and atmosphere. This structure is fundamental for understanding carbon assimilation, water loss through transpiration, and energy balance processes that control plant productivity and ecosystem functioning in earth system models. foliage Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Leaf NA The process of gathering mature crops or plant parts for human use, representing the culmination of agricultural production cycles. This activity is essential for understanding agricultural productivity, biomass removal from ecosystems, and the timing of nutrient cycling disruptions in managed terrestrial systems. crop harvest Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Harvest NA The thin layer of air or water immediately adjacent to a surface where flow properties such as velocity, temperature, and humidity change rapidly due to friction and molecular diffusion. This concept is crucial for understanding heat and mass transfer processes, turbulent mixing, and surface-atmosphere interactions in environmental systems. surface layer Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Boundary layer NA A state or condition that represents a threshold point where small changes can trigger significant transitions or responses in environmental systems. This concept is fundamental for understanding tipping points, phase transitions, and threshold behaviors in ecological processes, climate dynamics, and biogeochemical cycles. vital threshold Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Critical NA The soil zone where plant roots are primarily located and most active in water and nutrient uptake processes. This belowground region is essential for understanding plant-soil interactions, nutrient cycling, soil structure development, and the spatial distribution of biogeochemical processes in terrestrial ecosystems. rhizosphere root zone Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Root layer NA The uppermost layer of foliage in a forest or plant community that intercepts incoming solar radiation and precipitation. This structural component controls light penetration, microclimate conditions, and vertical habitat gradients that influence biodiversity, energy balance, and ecosystem functioning in terrestrial environments. canopy layer crown Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Canopy NA Carbon in ionic forms dissolved in water, including carbonate, bicarbonate, and dissolved carbon dioxide species. This carbon pool is fundamental for understanding aquatic carbon cycling, ocean acidification, carbonate chemistry, and the exchange of carbon dioxide between water bodies and the atmosphere in global carbon cycle studies. DIC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Dissolved inorganic carbon NA A calcium salt of phosphoric acid that serves as an important mineral form in soils and biological systems. This compound plays a role in phosphorus availability, soil fertility, and mineral weathering processes that control nutrient cycling and plant nutrition in terrestrial ecosystems. CaHPO4 DCP Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Dicalcium phosphate NA A chemical compound formed when iron combines with phosphate ions, commonly occurring in soils and sediments. This mineral form affects phosphorus availability, iron mobility, and redox chemistry in terrestrial and aquatic systems, influencing nutrient cycling and biogeochemical processes in environmental applications. FePO4 ferric phosphate Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Iron phosphate NA The advancement of organisms through seasonal life cycle stages such as flowering, fruiting, migration, or dormancy. This temporal progression is essential for understanding ecosystem timing, species interactions, climate change impacts, and the synchronization of biological processes with environmental conditions. phenophase seasonal development Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Phenological progress NA A very small pore or void space in soil or rock with diameter less than 2 micrometers that strongly holds water against gravitational forces. These pore spaces control water retention, solute transport, and microbial habitat availability, significantly influencing soil hydraulic properties and biogeochemical processes in terrestrial systems. capillary pore small pore Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Micropore NA Water flow that occurs over the ground surface when soil infiltration capacity is exceeded by precipitation intensity or when soils are saturated. This hydrological process controls erosion, flood generation, pollutant transport, and the redistribution of water and nutrients across terrestrial landscapes in watershed management applications. overland flow surface flow Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Surface runoff NA The distribution or allocation of resources, materials, or energy among different components, processes, or spatial compartments within environmental systems. This concept is fundamental for understanding resource competition, biogeochemical cycling, energy flow, and the spatial organization of ecological and physical processes. allocation distribution Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Partitioning NA A colorless gas composed of nitrogen and hydrogen that is highly soluble in water and readily forms ammonium ions in aqueous solutions. This compound is a key intermediate in nitrogen cycling, serving as both a product of organic matter decomposition and a substrate for nitrification processes in soil and aquatic ecosystems. NH3 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Ammonia NA Any compound or complex ion of iron and hydroxide groups, including the aqueous hydrolysis species of iron(III) and solid iron hydroxide precipitates in soils and sediments. Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) Iron hydroxide NA A greenhouse gas composed of two nitrogen atoms and one oxygen atom that contributes significantly to global warming and ozone depletion. This trace gas is produced through microbial nitrification and denitrification processes in soils and water bodies, making it an important component of biogeochemical nitrogen cycling and climate change studies. N2O Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Nitrous oxide NA A chemical compound commonly known as Epsom salt that occurs naturally in soils and water bodies. This mineral form affects magnesium and sulfur availability for plant nutrition, soil chemistry, and serves as a source of essential nutrients in agricultural and ecological systems. Epsom salt MgSO4 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Magnesium sulfate NA The amount of cold temperature exposure, typically measured in chilling hours or days below specific temperature thresholds, needed for certain biological processes to occur. This concept is essential for understanding dormancy breaking, flowering timing, and developmental processes in plants and other organisms responding to seasonal climate patterns. chilling requirement vernalization Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Cold requirement NA The process by which soil and rock particles are detached, transported, and deposited by natural forces such as water, wind, ice, and gravity. This geomorphological process shapes landscapes, affects soil fertility, influences water quality through sediment transport, and represents a critical component of earth surface dynamics and ecosystem functioning. soil loss weathering Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Erosion NA A multicellular organism that typically produces its own food through photosynthesis, serving as the primary producer in most terrestrial ecosystems. These organisms are fundamental for understanding carbon cycling, oxygen production, habitat structure, and the foundation of food webs in earth system science and ecological research. vegetation Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Plant NA The carbon content contained within protein molecules, representing a significant component of organic matter in living tissues and decomposing materials. This carbon pool is important for understanding nitrogen-carbon relationships, organic matter quality, and the cycling of nutrients in terrestrial and aquatic ecosystems. amino acid carbon protein C Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Protein carbon NA The amount of a substance present in a given volume or mass of solution, typically expressed in units such as molarity, parts per million, or mass per volume. This property is fundamental for characterizing chemical composition, pollutant levels, nutrient availability, and solution chemistry in environmental and ecological systems. mass per volume Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Concentration NA A greenhouse gas composed of one carbon atom and four hydrogen atoms that is produced through anaerobic decomposition and other biological processes. This trace gas contributes significantly to global warming and is an important component of biogeochemical carbon cycling in wetlands, agricultural systems, and permafrost environments. CH4 natural gas Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "CH4": Expressed as methane Methane NA The outermost boundary or interface of an object or material that interacts directly with the surrounding environment. This concept is fundamental for understanding heat transfer, gas exchange, radiation absorption, and chemical reactions that occur at the interface between different environmental compartments such as soil-atmosphere, water-atmosphere, and vegetation-atmosphere boundaries. boundary interface Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Surface NA The process of removing excess water from soil or surface areas through natural or artificial means such as infiltration, surface flow, or constructed drainage systems. This hydrological process controls soil moisture, prevents waterlogging, influences plant growth, and affects nutrient transport and biogeochemical processes in terrestrial ecosystems. water removal Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Drainage NA The solid form of water that occurs when water freezes below zero degrees Celsius, playing critical roles in hydrological and climatic systems. This phase of water affects surface albedo, seasonal water storage, habitat availability, and serves as a major component of the cryosphere that influences global climate and regional water resources. frozen water Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 medium concept "Ice": Sample collected as frozen water or sensor emplaced to measure properties of ice. Ice NA The dark, well-decomposed organic material that forms in soil through the breakdown and transformation of plant and animal matter by soil organisms. This stable organic component improves soil structure, water holding capacity, nutrient retention, and serves as a long-term carbon storage pool in terrestrial ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Humus NA Electromagnetic radiation with wavelengths longer than those of visible light, typically in the infrared range, that is emitted by all objects based on their temperature. This energy form is crucial for understanding earth's energy balance, greenhouse effect, nocturnal cooling processes, and heat transfer between earth's surface and atmosphere. LW infrared radiation Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Longwave radiation NA The uppermost layer of soil that directly interfaces with the atmosphere and serves as the primary zone for gas exchange, water infiltration, and energy transfer. This critical boundary zone controls seedling establishment, surface runoff generation, evaporation processes, and the exchange of materials and energy between terrestrial and atmospheric systems. ground surface topsoil interface Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Soil surface NA The inclined surface or gradient of land measured as the ratio of vertical rise to horizontal distance, typically expressed as a percentage or angle. This topographic parameter controls water flow direction, erosion potential, solar radiation exposure, and microclimate conditions that influence vegetation distribution and ecosystem processes across landscapes. gradient incline Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Slope NA Water that falls from clouds in the atmosphere to Earth's surface in various forms including rain, snow, sleet, or hail. This fundamental component of the hydrological cycle provides the primary water input to terrestrial ecosystems, drives runoff and groundwater recharge, and controls the spatial and temporal availability of water resources. rainfall Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Precipitation NA Carbon that is incorporated into organic compounds derived from living organisms, representing the foundation of biological molecules and ecosystem carbon pools. This carbon form is essential for understanding primary productivity, decomposition processes, soil organic matter dynamics, and carbon sequestration in terrestrial and aquatic ecosystems. OC biological carbon Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Organic carbon NA A chemical compound containing iron, hydrogen, and phosphate ions that occurs in soils and influences phosphorus and iron bioavailability. This mineral form affects nutrient cycling, soil chemistry, and plant nutrition through its role in phosphorus sorption and release processes in terrestrial ecosystems. Fe(H2PO4)2 iron phosphate Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Iron dihydrogen phosphate NA An anion consisting of one oxygen and one hydrogen atom with a negative charge that plays fundamental roles in acid-base chemistry and pH regulation. This ion is crucial for understanding soil alkalinity, mineral weathering, plant nutrient availability, and chemical equilibria in aquatic and terrestrial environmental systems. OH- hydroxyl ion Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Hydroxide NA An anion formed when chlorine gains an electron to achieve a stable electron configuration, commonly occurring in natural waters and soils. This ion affects soil salinity, plant salt tolerance, water quality, and serves as a conservative tracer for studying water movement and mixing processes in hydrological and ecological studies. Cl- Cl Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Chloride NA Fine particles of mineral material with diameters between 2 and 50 micrometers that are transported by water and wind and deposited as sediment. This particle size class influences soil texture, water retention, nutrient holding capacity, and erosion susceptibility in terrestrial ecosystems and sedimentary environments. fine particles sediment Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Silt": USDA particle size distribution category. 0.002 to 0.5 mm diameter fine earth particles. Silt NA The proportion of protein content relative to carbohydrate content in biological material, indicating the nutritional quality and biochemical composition of organic matter. This ratio is important for understanding food web dynamics, decomposition rates, nutrient cycling, and the energetic value of biological resources in ecological systems. P:C ratio Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) P:C here means protein to carbohydrate, as in nutritional ecology. In biogeochemical stoichiometry P:C means phosphorus to carbon, which is Phosphorus to carbon ratio (BERVO:8000211). Protein to carbohydrate ratio NA The lightest and most abundant chemical element in the universe that forms water molecules and organic compounds essential for all life processes. This element is fundamental for understanding acid-base chemistry, redox reactions, energy metabolism, and biogeochemical processes in environmental and ecological systems. H Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Hydrogen NA The rate of flow of energy or matter through a given area or surface per unit time, typically expressed in units such as mass per area per time. This concept is fundamental for quantifying biogeochemical processes, energy transfer, gas exchange, and material transport between different environmental compartments in earth system science. flow rate transfer rate Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Chemical flux NA The overall transfer of materials or energy between two systems after accounting for simultaneous bidirectional flows in both directions. This concept is essential for understanding ecosystem functioning, atmospheric exchange processes, and the balance between inputs and outputs in biogeochemical cycling and energy balance studies. balance net flux Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Net exchange NA The preferential binding, transport, or accumulation of specific ions over others by biological membranes, soil particles, or chemical processes. This property controls nutrient uptake efficiency, soil cation exchange, water treatment processes, and the bioavailability of different chemical species in environmental systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Ion selectivity NA A biological community of interacting organisms and their physical environment functioning as an integrated system through energy flow and nutrient cycling. This fundamental unit of ecological organization encompasses the relationships between biotic and abiotic components that determine ecosystem structure, function, and responses to environmental change. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Ecosystem NA A stored quantity of materials or energy that can be mobilized when needed, representing accumulated resources within biological or environmental systems. This concept is important for understanding ecosystem resilience, nutrient storage, carbon sequestration, and the capacity of systems to respond to disturbances or resource limitations. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Reserve NA A chemical compound consisting of iron and sulfate ions that occurs naturally in soils and water bodies and is commonly used as a soil amendment. This compound affects iron bioavailability, soil pH, plant nutrition, and serves as a source of both iron and sulfur nutrients in agricultural and ecological systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Iron sulfate NA Large pore or void spaces in soil with diameters greater than 50 micrometers that facilitate rapid water movement and gas exchange. These pore spaces control soil drainage, aeration, root penetration, and preferential flow pathways that significantly influence hydrological processes and biogeochemical transport in terrestrial systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Macropore NA The dry outer covering of fruits or seeds that provides protection for the inner reproductive parts during development and dispersal. This plant structure is important for understanding reproductive strategies, seed dispersal mechanisms, and agricultural processing considerations in crop and wild plant systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Husk NA Nitrogen in ionic forms dissolved in water, primarily including nitrate, nitrite, and ammonium ions that are readily available for biological uptake. This nitrogen pool represents the most bioavailable form of nitrogen in aquatic systems and soil solutions, controlling primary productivity and eutrophication in freshwater and marine environments. DIN Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Dissolved inorganic nitrogen NA The first leaf or one of the first leaves of a plant embryo that emerges during seed germination and provides initial nutrients for seedling establishment. This structure is essential for understanding early plant development, seedling survival, and the transition from seed-stored energy to photosynthetic carbon assimilation in plant life cycles. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Cotyledon NA The mixture of gases that surrounds Earth and forms its atmosphere, consisting primarily of nitrogen, oxygen, carbon dioxide, and trace gases. This gaseous medium facilitates gas exchange processes, affects plant photosynthesis and respiration, influences atmospheric pressure and weather patterns, and serves as the primary reservoir for atmospheric trace gases in earth system science. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 medium concept "Air": Specimen collection of ambient air or sensor emplaced to measure properties of ambient air. Air NA A chemical compound consisting of calcium, sulfur, and oxygen atoms that occurs naturally as gypsum and affects soil chemistry and plant nutrition. This mineral influences soil structure, water infiltration, calcium and sulfur availability, and serves as both a nutrient source and soil conditioner in agricultural and natural ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Calcium sulfate NA A group of phosphate minerals commonly found in rocks, soils, and biological systems that represent important sources of phosphorus for plants and ecosystems. These minerals control phosphorus availability through weathering processes, influence soil fertility, and serve as long-term reservoirs of phosphorus in terrestrial and marine biogeochemical cycles. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Apatite NA The region beneath the ground surface that includes soil horizons, rock layers, groundwater zones, and underground ecosystems. This three-dimensional space contains critical water resources, nutrient storage, carbon sequestration, and biogeochemical processes that influence surface ecosystem functioning and global environmental cycles. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 site type concept "Subsurface": A location below the land surface, but not a well, soil hole, or excavation. Subsurface NA A chemical compound consisting of magnesium and hydroxide ions that occurs in soils and affects pH and magnesium availability for plants. This compound influences soil alkalinity, nutrient cycling, and serves as a source of magnesium nutrition while affecting chemical equilibria in terrestrial and aquatic systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Magnesium hydroxide NA Dead plant material such as leaves, bark, twigs, and other organic debris that has fallen to the ground and forms the surface organic layer. This material provides habitat for decomposer organisms, controls soil moisture and temperature, serves as a source of nutrients through decomposition, and represents a critical component of carbon and nutrient cycling in terrestrial ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Litter, plant": Litterfall, plant litter, leaf litter, tree litter, soil litter, or duff, is dead plant material (such as leaves, bark, needles, twigs, and cladodes) that have fallen to the ground. Litter NA A chemical compound consisting of sodium and sulfate ions that occurs in soils and water bodies, particularly in arid and saline environments. This compound affects soil salinity, plant salt tolerance, water quality, and serves as both a source of sodium and sulfur that can influence ecosystem functioning and agricultural productivity. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Sodium sulfate NA A specialized carbon fixation process used by certain plants to concentrate carbon dioxide and minimize photorespiration under hot and dry conditions. This photosynthetic mechanism enhances water use efficiency and carbon assimilation rates, representing an important adaptation for understanding plant productivity and ecosystem responses to climate conditions. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) C4 carboxylation NA A chemical compound consisting of aluminum and phosphate ions that forms in acidic soils and affects phosphorus availability for plants. This mineral complex influences nutrient cycling, soil chemistry, and plant nutrition by controlling phosphorus sorption and release processes in terrestrial ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Aluminum phosphate NA A measure of how quickly a substance spreads through a medium by molecular diffusion, controlling the transport of gases, solutes, and heat in environmental systems. This property determines the rate of chemical transport, gas exchange, heat transfer, and mixing processes that influence biogeochemical reactions and environmental gradients. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Diffusivity NA The interface between the solid earth and the atmosphere where most surface-atmosphere interactions occur, including energy exchange, precipitation interception, and runoff generation. This critical boundary zone controls heat and moisture fluxes, serves as the primary surface for vegetation establishment, and represents the fundamental interface for earth-atmosphere system interactions. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Ground surface NA An enzyme that catalyzes the addition of carbon dioxide to phosphoenolpyruvate, serving as the primary carbon-fixing enzyme in C4 and Crassulacean acid metabolism photosynthesis. This enzyme is crucial for understanding alternative photosynthetic pathways, plant adaptation to environmental stress, and carbon assimilation efficiency in different plant functional types. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Phosphoenolpyruvate carboxylase NA The upper layer of earth in which plants grow, consisting of weathered rock particles, organic matter, water, air, and living organisms. This complex medium supports terrestrial life by providing mechanical support, nutrients, and water to plants while serving as a habitat for countless organisms and a major reservoir for carbon, nitrogen, and other biogeochemical cycles. dirt ground humus loam Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 medium concept "Soil": Specimen collected from soil or sensor emplaced to measure properties of soil. Soil includes the mixture of minerals, organic matter, gasses, liquids, and organisms that make up the upper layer of earth in which plants grow. Soil NA The process of transferring materials, energy, or information between different systems, compartments, or environmental pools. This fundamental concept encompasses gas exchange, nutrient cycling, energy transfer, and other bidirectional flows that connect different components of earth and environmental systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Exchange NA A defined area or region with specific environmental characteristics, functions, or management designations that distinguish it from surrounding areas. This spatial concept is essential for understanding ecological gradients, biogeographic patterns, management units, and the spatial organization of environmental processes and properties. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Zone NA The length of time during which an environmental process, event, or condition continues or persists. This temporal dimension is fundamental for characterizing seasonal patterns, disturbance regimes, phenological events, and the time scales of ecological and biogeochemical processes in earth system science. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Duration NA The uppermost layer of soil that contains the highest concentration of organic matter and supports most plant root activity. This fertile horizon is critical for agricultural productivity, carbon sequestration, water infiltration, and serves as the primary zone for plant-soil interactions and nutrient cycling in terrestrial ecosystems. surface soil Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Topsoil NA Phosphorus in ionic forms dissolved in water, primarily as orthophosphate and polyphosphate species that are readily available for biological uptake. This phosphorus pool represents the most bioavailable form of phosphorus in aquatic systems, controlling primary productivity and eutrophication processes in freshwater and marine environments. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Dissolved inorganic phosphorus NA A chemical substance that provides nourishment essential for the growth, development, and maintenance of living organisms. These elements and compounds, including nitrogen, phosphorus, potassium, and others, control primary productivity, ecosystem functioning, and biogeochemical cycling in terrestrial and aquatic systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Nutrient NA The measurement of vertical distance from a reference surface downward, fundamental for characterizing soil profiles, water column structure, and three-dimensional habitat characteristics. This spatial dimension controls light penetration, pressure gradients, temperature profiles, and biogeochemical processes that vary with depth in environmental systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Depth": The perpendicular measurement downward from a surface Depth NA The artificial application of water to agricultural land to supplement natural precipitation and ensure adequate moisture for crop growth. This water management practice affects soil moisture, nutrient transport, crop productivity, and represents a major component of agricultural water use and landscape modification in many regions. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Irrigation NA A chemical compound consisting of potassium and sulfate ions that serves as a source of both potassium and sulfur nutrients for plants. This fertilizer compound affects plant nutrition, soil chemistry, and crop productivity while providing essential elements needed for plant growth and metabolic processes in agricultural and natural systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Potassium sulfate NA The proportion of carbon content relative to phosphorus content in biological materials, indicating the stoichiometric relationship between these essential elements. This ratio influences decomposition rates, nutrient cycling, microbial activity, and ecosystem responses to nutrient availability in terrestrial and aquatic environments. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Carbon to phosphorus ratio NA An anion containing hydrogen, phosphorus, and oxygen atoms that represents an intermediate form of phosphate in acid-base equilibria. This ionic species affects phosphorus availability, soil chemistry, and pH buffering capacity in terrestrial and aquatic systems where phosphorus cycling occurs. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Hydrogen phosphate NA Compound of one iron(III) ion and three hydroxide groups, Fe(OH)3, occurring both as the uncharged aqueous species in the stepwise hydrolysis of ferric iron and as the solid precipitate whose dissolution controls ferric iron solubility in soil. Fe(OH)3 Iron trihydroxide ferric hydroxide iron(III) hydroxide Covers both the dissolved species, Fe(OH)3(aq), and the solid, Fe(OH)3(s); the variable that names this term says which. The equilibrium between the two forms is BERVO:0000089. Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) Iron(III) trihydroxide NA A chemical element that forms the structural backbone of all organic compounds and serves as the foundation for life on Earth. This element is central to understanding photosynthesis, respiration, decomposition, and the global carbon cycle that connects atmospheric, terrestrial, and marine carbon reservoirs in earth system science. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "C": Expressed as carbon Carbon NA The measurement of vertical extent from base to top, representing the three-dimensional structure of organisms, landforms, and other environmental features. This spatial dimension controls light interception, aerodynamic properties, habitat structure, and competitive interactions in ecological systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Height": Height is measure of vertical distance, either vertical extent or vertical position Height NA The process of seed development and enlargement in cereal crops following pollination and fertilization. This reproductive phase determines final grain size, yield potential, and harvest quality, representing a critical period for understanding crop productivity and agricultural ecosystem functioning. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Grain growth NA A small rounded structure, often containing nitrogen-fixing bacteria, that forms on plant roots and facilitates the conversion of atmospheric nitrogen into plant-available forms. These symbiotic structures are essential for understanding biological nitrogen fixation, plant nutrition, and ecosystem nitrogen cycling in terrestrial environments. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Nodule NA The extent of a two-dimensional surface or region measured in square units, fundamental for quantifying spatial coverage and habitat extent. This geometric property is essential for calculating densities, productivity rates, ecosystem service provision, and scaling processes from local to landscape levels in environmental studies. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Area": Area of a measurement location Area NA The amount of soluble three-carbon compounds in plant tissue that can be readily metabolized for energy and growth processes. These compounds represent the mobile carbon reserves that plants use for respiration, growth, and stress responses, and are important for understanding plant carbon allocation and metabolic strategies. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Non-structural C3 content NA Single-celled microorganisms that can be found in virtually every environment on Earth, playing crucial roles in biogeochemical cycling and ecosystem functioning. These prokaryotic organisms drive nitrogen fixation, decomposition, nutrient mineralization, and other essential processes that maintain ecosystem productivity and environmental quality. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Bacteria NA The star at the center of the solar system that provides virtually all energy for life on Earth through electromagnetic radiation. This energy source drives photosynthesis, weather patterns, ocean currents, and seasonal cycles that control ecosystem processes and global environmental dynamics. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Sun NA Area of open land managed for agricultural use, whether cultivated for crops, grazed by livestock, planted as an orchard, or used as a nursery to raise plants for transplanting or sale. agricultural field cropland nursery orchard pasture Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66, after ENVO:00000114 and the ODM2 concept ODM2 site type concept "Field, Pasture, Orchard, or Nursery": A water-using facility characterized by an area where plants are grown for transplanting, for use as stocks for budding and grafting, or for sale. Irrigation water may or may not be applied. Field NA The count of seeds or kernels produced by an individual plant, representing a key component of agricultural yield and reproductive success. This quantitative measure is essential for understanding crop productivity, plant fitness, and the allocation of resources to reproductive structures in agricultural and natural plant populations. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Grain number NA A state of matter consisting of particles that move freely and expand to fill available containers, including atmospheric gases and soil air. This phase of matter facilitates gas exchange processes, affects atmospheric composition, controls respiration and photosynthesis, and serves as a medium for volatile chemical transport in environmental systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 medium concept "Gas": Gas phase specimen or sensor emplaced to measure properties of a gas. Gas NA A chemical compound containing magnesium and bicarbonate ions that occurs in natural waters and affects water chemistry and plant nutrition. This compound influences water alkalinity, pH buffering capacity, and serves as a source of both magnesium and inorganic carbon in aquatic and soil systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Magnesium bicarbonate NA Soluble carbon-based molecules such as sugars, organic acids, and amino acids that can be readily metabolized by organisms for energy and biosynthesis. These compounds represent the mobile fraction of organic matter that controls microbial activity, decomposition rates, and nutrient cycling in terrestrial and aquatic ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Non-structural organic compounds NA Loose granular material composed of finely divided rock and mineral particles with diameters between 0.05 and 2 millimeters. This soil component affects water infiltration, drainage, aeration, and root penetration while influencing soil texture, structure, and hydraulic properties in terrestrial ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Sand": USDA particle size distribution category. 0.5 to 2 mm diameter fine earth particles. Sand NA The chemical reaction that adds carboxyl groups to organic compounds, most importantly the fixation of carbon dioxide into organic molecules during photosynthesis. This process is fundamental for understanding primary productivity, carbon assimilation, and the conversion of inorganic carbon into organic matter in terrestrial and aquatic ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Carboxylation NA The diverse community of microorganisms including bacteria, archaea, fungi, and protists present in a given environment. These organisms drive essential biogeochemical processes, decomposition, nutrient cycling, and symbiotic relationships that are fundamental for ecosystem functioning and environmental quality maintenance. microorganisms Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Microbes NA A form of thermal energy that transfers between objects or systems due to temperature differences, driving many environmental and biological processes. This energy form controls evapotranspiration, soil warming, metabolic rates, and seasonal patterns that influence ecosystem dynamics and species distributions in earth system science. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Heat NA Carbon incorporated into structural components of organisms such as cellulose, lignin, and chitin that provide mechanical support and protection. This carbon pool represents a stable, slow-cycling component of organic matter that influences decomposition rates, carbon sequestration, and long-term carbon storage in terrestrial ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Structural carbon NA A chemical compound commonly found in rocks, shells, marine organisms, and soils that plays important roles in carbon cycling and pH regulation. This compound affects soil chemistry, carbon sequestration in marine systems, and serves as a major component of limestone and biological structures in earth system processes. CaCO3 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "CaCO3": Expressed as calcium carbonate Calcium carbonate NA The speed at which a process occurs or changes over time, typically expressed as the amount of change per unit time interval. This temporal concept is fundamental for quantifying biological processes, chemical reactions, physical transformations, and environmental changes in ecological and earth system studies. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Rate NA Dead organic material lying directly on top of the soil surface, representing the freshest component of the litter layer before incorporation into soil. This material provides immediate habitat for decomposer organisms, controls surface moisture and temperature, and represents the initial stage of organic matter decomposition and nutrient release in terrestrial ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Is this different from "litter" with the context of "surface"? Surface litter NA Carbon from organic compounds that is dissolved in water, representing a mobile and bioavailable fraction of organic matter in aquatic systems. This carbon pool supports microbial metabolism, affects water color and chemistry, and serves as an important component of carbon cycling in streams, lakes, and marine environments. DOC Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Dissolved organic carbon NA An anion consisting of one carbon atom and three oxygen atoms that forms when carbon dioxide dissolves in water and affects pH and alkalinity. This ion is fundamental for understanding ocean acidification, carbonate chemistry, shell formation, and carbon cycling in aquatic and terrestrial systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "CO3": Expressed as carbonate Carbonate NA The height of an object or point above sea level or a reference ground level, affecting atmospheric pressure, temperature, and ecosystem characteristics. This elevation parameter controls climate gradients, species distributions, vegetation zones, and biogeochemical processes that vary with elevation in mountainous and high-altitude environments. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Altitude": Altitude or height (sometimes known as depth) is defined based on the context in which it is used (aviation, geometry, geographical survey, sport, atmospheric pressure, and many more). As a general definition, altitude is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. The reference datum also often varies according to the context. Although the term altitude is commonly used to mean the height above sea level of a location, in geography the term elevation is often preferred for this usage. Altitude NA Nitrogen from organic compounds that is dissolved in water, representing an important but often overlooked component of aquatic nitrogen cycling. This nitrogen pool includes amino acids, proteins, and other organic nitrogen compounds that can be mineralized or directly utilized by organisms in freshwater and marine ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Dissolved organic nitrogen NA The speed and direction of motion of an object or fluid, fundamental for understanding transport processes and dynamics in environmental systems. This vector quantity controls wind patterns, water flow, sediment transport, and pollutant dispersion that influence ecosystem processes and environmental quality. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Velocity": The velocity of a substance, fluid or object Velocity NA A transparent, odorless, and tasteless liquid essential for all forms of life and the most abundant compound on Earth's surface. This molecule serves as the universal solvent, controls climate patterns, supports biological processes, and represents the fundamental medium for biogeochemical reactions and ecosystem functioning. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "H2O": Expressed as water. ODM2 medium concept "Liquid aqueous": Specimen collected as liquid water or sensor emplaced to measure properties of water in sampled environment. Water NA Precipitation in the form of ice crystals that accumulates on land surfaces and serves as a major component of the hydrological cycle. This frozen water form affects surface albedo, provides seasonal water storage, influences plant dormancy patterns, and controls spring flooding and water resource availability in many regions. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 medium concept "Snow": Observation in, of or sample taken from snow. Snow NA A measurable parameter that reflects the level of environmental stress experienced by organisms or ecosystems in response to adverse conditions. These indicators help assess ecosystem health, environmental quality, and the impacts of disturbances such as drought, pollution, or climate change on biological systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Stress indicator NA The efficiency with which plants convert available resources such as carbon, nutrients, and energy into root biomass production. This measure indicates plant allocation strategies, resource use efficiency, and adaptation to soil conditions that affect plant establishment and ecosystem productivity. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Root growth yield NA A series of actions, changes, or functions that occur over time to transform inputs into outputs or achieve specific environmental or biological outcomes. This concept encompasses biogeochemical cycles, ecological succession, and physical transformations that drive ecosystem functioning and environmental change. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Process NA A chemical compound consisting of aluminum and sulfate ions that occurs in acidic soils and affects soil chemistry and plant nutrition. This compound influences soil pH, aluminum toxicity, nutrient availability, and plant growth in acid-sensitive ecosystems and agricultural systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Aluminum sulfate NA A chemical element essential for plant cell wall structure, membrane stability, and cellular signaling processes in all living organisms. This nutrient affects soil structure, plant growth, ecosystem productivity, and serves as a major component of shells, bones, and geological formations in earth systems. Ca Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "Ca": Expressed as calcium Calcium NA The proportion of carbon content relative to nitrogen content in organic materials, indicating decomposition rates and nutrient cycling dynamics. This stoichiometric relationship controls microbial activity, organic matter decomposition, nitrogen mineralization, and ecosystem responses to environmental changes and management practices. C:N ratio Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Carbon to nitrogen ratio NA Hydrolysis species of iron(III) in which four hydroxide groups are bound to a single iron(III) ion, giving a net charge of 1-; the anionic species that ends the stepwise hydrolysis of ferric iron and dominates it under alkaline conditions. Fe(OH)4(-) Iron tetrahydroxide Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) Iron(III) tetrahydroxide NA Energy emitted in the form of electromagnetic waves or particles that travels through space and affects environmental processes and biological systems. This energy form includes solar radiation, thermal radiation, and other electromagnetic emissions that drive photosynthesis, heating, and energy balance in earth system science. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Radiation NA An atom or molecule that has gained or lost electrons and carries an electric charge, playing crucial roles in chemical reactions and biological processes. These charged particles control nutrient availability, soil chemistry, membrane transport, and electrochemical processes in terrestrial and aquatic environmental systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Ion NA A positively charged ion consisting of one nitrogen and four hydrogen atoms that represents a major form of bioavailable nitrogen in soils and water. This nitrogen species is readily absorbed by plants, affects soil chemistry, and serves as a key component of nitrogen cycling in terrestrial and aquatic ecosystems. NH4 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "NH4": Expressed as ammonium Ammonium NA The process by which liquid water changes into water vapor due to thermal energy, representing a major component of the hydrological cycle. This phase transition controls water loss from soil and plant surfaces, affects local humidity, and influences energy balance and climate patterns in environmental systems. vaporization Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Evaporation NA Electromagnetic radiation with wavelengths shorter than infrared radiation, primarily including visible light and ultraviolet radiation from the sun. This energy form drives photosynthesis, affects atmospheric chemistry, controls surface heating, and represents the primary energy input to earth's climate system. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Shortwave radiation NA The process of increasing in size, biomass, or complexity over time in biological organisms or ecological systems. This fundamental biological process controls primary productivity, population dynamics, ecosystem development, and represents the accumulation of organic matter and energy in environmental systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Growth NA The aggregation of particles, organisms, or materials into larger clusters or groups due to physical, chemical, or biological forces. This process affects soil structure, seed dispersal, species distributions, and the spatial organization of materials and organisms in environmental and ecological systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Clumping NA Water in its gaseous state present in the atmosphere, representing a major component of the global water cycle and greenhouse gas budget. This atmospheric moisture controls humidity, precipitation formation, heat transport, and energy balance processes that influence weather patterns and climate dynamics. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Water vapor NA Hydrolysis species of aluminum(III) in which two hydroxide groups are bound to a single aluminum(III) ion, giving a net charge of 1+; the second species in the stepwise hydrolysis of aluminum in soil solution. Al(OH)2(+) Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) Aluminum dihydroxide NA A reproductive unit of a flowering plant that contains an embryo and stored nutrients capable of developing into a new plant under appropriate conditions. This structure is fundamental for understanding plant reproduction, population dynamics, genetic diversity, and ecosystem regeneration processes. germ kernel pip Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Seed NA The amount of thermal energy needed to raise the temperature of a unit volume of material by one degree, controlling how materials respond to temperature changes. This property affects soil thermal dynamics, heat storage in water bodies, and temperature regulation processes that influence ecosystem functioning and climate patterns. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Volumetric heat capacity NA A point on a plant stem where leaves, buds, branches, or other structures emerge, representing sites of active growth and development. These structural features control plant architecture, branching patterns, leaf arrangement, and resource allocation strategies that affect plant productivity and competitive ability. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Node NA A chemical compound consisting of one nitrogen and two oxygen atoms that serves as an air pollutant and component of atmospheric nitrogen cycling. This reactive gas affects air quality, acid rain formation, ozone chemistry, and represents both a product and precursor of various nitrogen transformation processes. NO2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Nitrogen dioxide NA A chemical element essential for aerobic respiration, combustion processes, and the formation of many chemical compounds in environmental systems. This element controls metabolic rates, decomposition processes, water quality, and serves as a key component of atmospheric composition and biogeochemical cycling. O2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "O2": Expressed as oxygen (O2) Oxygen NA A substance that is dissolved in a solvent to form a solution, representing the dissolved component of aqueous and other liquid systems. These dissolved materials control solution chemistry, osmotic properties, nutrient availability, and chemical transport processes in terrestrial and aquatic environments. Dissolved substance Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Solute NA The amount or proportion of a specific substance within a material, typically expressed as a concentration, percentage, or mass fraction. This property characterizes material composition, nutrient concentrations, pollutant levels, and chemical constituents that control environmental processes and ecosystem functioning. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Content NA The state of being active or the rate at which a process occurs, often referring to biological, chemical, or physical activity levels in environmental systems. This concept encompasses metabolic activity, enzyme activity, microbial activity, and other dynamic processes that drive ecosystem functioning and biogeochemical cycling. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Activity NA The concentration of substrate at which an enzymatic or biological process operates at half its maximum rate, indicating the efficiency of resource utilization. This kinetic parameter is fundamental for understanding nutrient uptake, enzyme kinetics, and resource limitation in biological and biogeochemical processes. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Half saturation constant NA The speed at which an organism converts energy for biological processes such as growth, maintenance, and reproduction. This physiological parameter controls resource requirements, heat production, and carbon dioxide release, influencing individual fitness and ecosystem-level energy and carbon cycling. respiration rate Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Metabolic rate NA The force applied perpendicular to a surface per unit area, affecting physical processes and system behaviors in atmospheric, aquatic, and terrestrial environments. This physical property controls gas exchange, water movement, atmospheric dynamics, and mechanical stress on organisms and materials. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Air pressure NA The layer of gases surrounding Earth held in place by gravity, consisting primarily of nitrogen, oxygen, carbon dioxide, and trace gases. This gaseous envelope controls climate patterns, weather systems, gas exchange processes, and serves as the medium for atmospheric transport and chemical reactions in earth system science. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 site type concept "Atmosphere": A site established primarily to measure meteorological properties or atmospheric deposition. Atmosphere NA The capacity to do work or cause change in physical, chemical, or biological systems, existing in various forms such as solar, thermal, chemical, and kinetic energy. This fundamental concept drives all environmental processes, ecosystem functioning, and biogeochemical cycles that sustain life and shape earth system dynamics. heat work Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Energy NA A measure of the average kinetic energy of particles in a substance, controlling reaction rates, phase transitions, and biological processes in environmental systems. This intensive property affects enzymatic activity, species distributions, ecosystem productivity, and serves as a fundamental driver of climate and weather patterns. temp warmth Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Temperature": Temperature Temperature NA Area of the solid surface of the Earth not covered by permanent water, comprising its soil, vegetation, and exposed rock, from the whole land surface down to a single tract under one use. terrain Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 (#81 review); the Sep 26 2025 definition's second sentence is kept in Comment The land surface is the interface between the terrestrial and atmospheric systems: it controls energy exchange, water cycling, and vegetation growth, and it is the foundation of terrestrial ecosystem functioning. ODM2 site type concept "Land": A location on the surface of the earth that is not normally saturated with water. Land sites are appropriate for sampling vegetation, overland flow of water, or measuring land-surface properties such as temperature. (See also: Wetland). Land surface NA A method of applying water to agricultural crops by flowing water over the soil surface through furrows, basins, or flood systems. This irrigation technique affects soil moisture distribution, nutrient transport, erosion potential, and represents a major water management practice in agricultural systems worldwide. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Surface irrigation NA The edible seed of cereal plants such as wheat, rice, or corn that serves as a major food source and agricultural product. These reproductive structures represent the harvestable portion of cereal crops, control agricultural yield, and serve as both food resources and propagules for plant reproduction in agricultural ecosystems. kernel Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Grain NA The amount of matter contained in an object or substance, typically measured in units such as grams or kilograms. This fundamental property affects gravitational forces, inertia, density calculations, and serves as a basis for quantifying material quantities and concentrations in environmental and ecological studies. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Mass": Mass is a property of a physical body. It is generally a measure of an object's resistance to changing its state of motion when a force is applied. Mass NA An anion consisting of one phosphorus atom and four oxygen atoms that represents the primary form of bioavailable phosphorus in environmental systems. This ion controls plant nutrition, microbial activity, eutrophication processes, and serves as a key component of phosphorus cycling in terrestrial and aquatic ecosystems. PO4 PO43- Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "PO4": Expressed as phosphate Phosphate NA A chemical compound consisting of calcium and hydroxide ions that affects soil pH and calcium availability in terrestrial systems. This compound influences soil alkalinity, plant nutrition, and chemical weathering processes while serving as both a product and driver of mineral-water interactions in environmental systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Calcium hydroxide NA An anion consisting of one hydrogen, one carbon, and three oxygen atoms that serves as an important component of carbonate chemistry and pH buffering systems. This ion affects water alkalinity, carbon cycling, ocean acidification, and serves as a form of dissolved inorganic carbon in aquatic and soil systems. hydrogen carbonate Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "HCO3": Expressed as hydrogen carbonate Bicarbonate NA The condition when plants experience insufficient water availability relative to their physiological demands, affecting growth, survival, and ecosystem functioning. This stress response triggers various physiological and morphological adaptations, influences species distributions, and represents a major constraint on ecosystem productivity in water-limited environments. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Plant water stress NA A chemical element that is highly reactive and forms many important compounds affecting soil salinity, plant physiology, and water quality. This alkali metal influences soil structure, plant salt tolerance, groundwater chemistry, and serves as both an essential micronutrient and potential toxin in environmental systems. Na Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "Na": Expressed as sodium Sodium NA The upper boundary of the saturated zone in groundwater where soil pores and rock fractures are completely filled with water. This hydrological feature controls plant water access, soil moisture patterns, groundwater flow, and influences ecosystem functioning and species distributions in terrestrial environments. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Water table NA A woody structural member of a tree or shrub that grows from the trunk or main stem and supports leaves, flowers, and fruits. These structural components control plant architecture, light interception, resource allocation, and competitive ability while influencing canopy structure and ecosystem functioning. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Branch NA The speed at which carbon dioxide is incorporated into organic compounds during photosynthesis and other carbon fixation processes. This rate controls primary productivity, carbon assimilation efficiency, and plant responses to atmospheric carbon dioxide concentrations in terrestrial and aquatic ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Carbon dioxide carboxylation rate NA The amount of thermal energy needed to raise the temperature of a substance by one degree, controlling how materials respond to temperature changes. This property affects thermal buffering, temperature regulation, heat storage, and energy balance processes that influence ecosystem functioning and climate dynamics. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Heat capacity NA Water that collects on the ground surface or in natural water bodies such as streams, rivers, lakes, and oceans. This water source supports aquatic ecosystems, provides drinking water and irrigation supplies, and represents the most visible and accessible component of freshwater resources in hydrological systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Surface water NA A limitation or restriction that affects the behavior, growth, or functioning of biological or environmental systems. These limiting factors control ecosystem processes, species distributions, resource availability, and represent bottlenecks that determine system performance and responses to environmental change. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Constraint NA Water applied to agricultural crops through artificial means to supplement natural precipitation and ensure adequate moisture for plant growth. This managed water input affects crop productivity, soil moisture, nutrient transport, and represents a major component of agricultural water use and landscape modification. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Irrigation water NA The main stem or support structure of a plant that provides mechanical support and serves as a conduit for water, nutrients, and photosynthetic products. This structural component controls plant height, competitive ability, resource transport, and represents the primary architectural framework of herbaceous plants and crop species. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Stalk NA The blocking of light by one part of a plant from reaching another part of the same plant, affecting photosynthetic efficiency and plant architecture. This phenomenon influences leaf arrangement, branching patterns, plant productivity, and represents an important constraint on light capture and carbon assimilation in dense vegetation. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Self shading NA A substance added to soil or applied to plants to provide essential nutrients that promote plant growth and agricultural productivity. These materials affect soil fertility, crop yields, nutrient cycling, and represent a major input in agricultural systems that can influence both productivity and environmental quality. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) This may be a subclass of "Amendment", which would also include wood chips, other sources of soil additions Fertilizer NA Hydrolysis species of aluminum(III) in which four hydroxide groups are bound to a single aluminum(III) ion, giving a net charge of 1-; the anionic species that ends the stepwise hydrolysis of aluminum and dominates it under alkaline conditions. Al(OH)4(-) Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) Aluminum tetrahydroxide NA A type of photosynthetic pathway that concentrates carbon dioxide around the enzyme Rubisco to improve photosynthetic efficiency under hot and dry conditions. This metabolic adaptation reduces photorespiration, enhances water use efficiency, and represents an important evolutionary strategy for plants in arid and semi-arid environments. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) C4 NA An anion containing two hydrogen atoms and one phosphate group that represents an important form of phosphorus in soil solutions and biological systems. This ionic species affects phosphorus availability, pH buffering, and serves as a bioavailable form of phosphorus for plant uptake and microbial processes. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Dihydrogen phosphate NA The state of being fully developed or having reached the final stage of growth and development in biological organisms or ecological systems. This developmental stage affects reproductive capacity, resource allocation, harvest timing, and represents a critical transition point in organism life cycles and ecosystem succession. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Maturity NA The process by which flowers develop into mature seeds following successful pollination and fertilization, representing a critical reproductive stage. This developmental process determines reproductive success, crop yields, genetic diversity, and influences population dynamics and ecosystem regeneration in plant communities. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) This refers to a process (a stage of growth) Seed set NA Particles of organic or inorganic matter that settle out of water or air due to gravitational forces, forming deposits in aquatic and terrestrial environments. These materials affect water quality, habitat structure, nutrient cycling, and represent important components of geomorphological and biogeochemical processes. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 medium concept "Sediment": Specimen collected from material broken down by processes of weathering and erosion and subsequently transported by the action of wind, water, or ice, and/or by the force of gravity acting on the particles. Sensors may also be emplaced to measure sediment properties. Sediment NA The above-ground portion of a plant including stems, leaves, and reproductive organs that conducts photosynthesis and reproduction. This structural component controls light capture, gas exchange, resource acquisition, and represents the primary interface between plants and the atmospheric environment. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Shoot NA A homogeneous mixture of two or more substances where one substance (solute) dissolves completely in another (solvent), forming a uniform composition. These liquid systems control chemical transport, nutrient availability, biogeochemical reactions, and represent the primary medium for chemical processes in environmental systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Solution NA Branching structures that develop from the main axis of growth in plants, creating additional growing points and increasing structural complexity. These architectural features affect light interception, resource capture, reproductive capacity, and represent important components of plant competitive strategies and ecosystem structure. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Secondary axes NA The ratio of total leaf area to ground area covered by vegetation, representing the amount of photosynthetic surface available for light interception. This dimensionless parameter controls canopy light interception, photosynthetic capacity, evapotranspiration, and serves as a key measure of vegetation density and ecosystem productivity. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Leaf area index NA A nitrogen-containing organic compound commonly used as a fertilizer and naturally produced through protein metabolism in organisms. This compound provides readily available nitrogen for plant uptake, affects soil chemistry, and represents an important component of nitrogen cycling in agricultural and natural ecosystems. CO(NH2)2 carbamide Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Urea NA A chemical compound consisting of sodium and carbonate ions that affects water and soil chemistry, particularly in alkaline environments. This compound influences pH, salinity, mineral precipitation, and serves as both a natural component of alkaline soils and waters and an industrial chemical with environmental applications. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Sodium carbonate NA A chemical element essential for protein synthesis, nucleic acid formation, and overall plant growth and development in all living organisms. This element often limits primary productivity in terrestrial and aquatic ecosystems, controls plant nutrition, and serves as a key component of biogeochemical cycling and atmospheric chemistry. N Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "N": Expressed as nitrogen Nitrogen NA An anion consisting of one nitrogen and three oxygen atoms that represents the most oxidized form of inorganic nitrogen in environmental systems. This ion serves as a major source of nitrogen for plant uptake, affects water quality through eutrophication, and represents the final product of nitrification in soil and aquatic systems. NO3 NO3- Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "NO3": Expressed as nitrate Nitrate NA A specialized form of photosynthesis that concentrates carbon dioxide around the enzyme Rubisco to minimize photorespiration and enhance carbon assimilation efficiency. This metabolic pathway is particularly advantageous in hot, dry conditions and represents an important adaptation that affects ecosystem productivity and species distributions. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) C4 photosynthesis NA The carbon content contained within protein molecules specifically located in leaf sheath tissue, representing a specialized component of plant protein pools. This carbon fraction is important for understanding tissue-specific carbon allocation, protein distribution, and the role of different plant organs in carbon storage and metabolism. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Sheath protein carbon NA The underground portion of a plant that anchors the plant in soil and absorbs water and nutrients essential for growth and survival. This organ system controls plant nutrition, soil stabilization, symbiotic relationships, and represents the primary interface between plants and the soil environment. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Root NA Combustion that sustains itself and spreads through available fuel, producing flames, heat, light, and smoke. As an environmental disturbance, fire shapes ecosystem structure, nutrient cycling, species composition, and vegetation patterns. burn Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), rewritten to distinguish Fire from Combustion in the PR #141 review Fire NA A chemical compound containing iron, hydrogen, and phosphate ions that occurs in soils and affects both iron and phosphorus bioavailability. This mineral form influences nutrient cycling, soil chemistry, and plant nutrition through its role in controlling the solubility and mobility of iron and phosphorus in terrestrial systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Iron hydrogen phosphate NA A strip or zone of material with distinct physical, chemical, or biological characteristics that differs from surrounding areas. This spatial concept describes soil horizons, vegetation zones, spectral regions, and other linear or layered features that exhibit gradients or boundaries in environmental systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Band NA A mathematical concept used to count, measure, or quantify discrete objects, events, or properties in environmental and ecological studies. This fundamental concept enables quantitative analysis, statistical description, and numerical modeling of environmental processes and ecosystem characteristics. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Number NA A zone or area where soil erosion processes are particularly active or concentrated due to topographic, climatic, or management factors. These areas represent hotspots of sediment production, landscape change, and environmental degradation that affect soil resources, water quality, and ecosystem functioning. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) obsolete Erosion band true NA A period of 24 hours representing one complete rotation of Earth relative to the sun, serving as a fundamental unit for measuring environmental cycles. This temporal scale captures diurnal patterns of solar radiation, temperature, biological activity, and atmospheric processes that drive ecosystem functioning and environmental dynamics. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Day NA A lightweight metallic element that is the third most abundant element in Earth's crust and commonly occurs in soil minerals such as feldspars and clays. This element affects soil chemistry, plant nutrition, and can become toxic to plants under acidic conditions, influencing ecosystem productivity and species distributions. Al Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "Al": Expressed as aluminium Aluminum NA The main structural axis of a plant that provides mechanical support and serves as a conduit for transporting water, nutrients, and photosynthetic products between roots and leaves. This organ system controls plant architecture, competitive ability, and resource allocation while serving as a storage site for carbohydrates and other compounds. stalk Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Stem NA A chemical element essential for many biological processes including photosynthesis, respiration, and chlorophyll synthesis in plants and other organisms. This transition metal affects plant nutrition, soil color, redox chemistry, and serves as both an essential micronutrient and a potential toxin depending on its chemical form and concentration. Fe Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "Fe": Expressed as iron Iron NA A protective covering or wrapper structure that surrounds and protects plant organs such as stems, leaves, or reproductive parts. These anatomical features provide mechanical protection, support, and can influence plant architecture and development while serving specialized functions in different plant families and growth forms. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Sheath NA The horizontal movement of air masses from areas of high atmospheric pressure to areas of low pressure, driven by differential heating and pressure gradients. This meteorological phenomenon controls heat transfer, moisture transport, pollination, seed dispersal, and mechanical stress on vegetation while influencing local and regional climate patterns. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Wind NA Phosphorus contained within organic compounds that is dissolved in water, representing an important but often underestimated component of aquatic phosphorus cycling. This phosphorus pool includes nucleic acids, phospholipids, and other organic phosphorus compounds that can be mineralized or directly utilized by organisms in freshwater and marine ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Dissolved organic phosphorus NA A chemical compound consisting of calcium and phosphate ions that occurs naturally in rocks, soils, and biological systems such as bones and teeth. This mineral affects soil fertility, phosphorus availability, and serves as both a nutrient source and a sink for phosphorus in terrestrial and aquatic biogeochemical cycles. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Calcium phosphate NA A chemical compound containing calcium and dihydrogen phosphate ions that serves as a source of both calcium and phosphorus in soils and fertilizer applications. This compound affects nutrient availability, soil chemistry, and plant nutrition while representing an important form of phosphorus that can be readily dissolved and utilized by plants. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Calcium dihydrogen phosphate NA A colorless gas consisting of one carbon and two oxygen atoms that plays central roles in photosynthesis, respiration, and global climate regulation. This greenhouse gas is fundamental for understanding carbon cycling, climate change, plant productivity, and the exchange of carbon between atmospheric, terrestrial, and marine reservoirs. CO2 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "CO2": Expressed as carbon dioxide Carbon dioxide NA Soluble sugars and readily mobilizable starch that can be quickly metabolized by plants for energy, growth, and stress responses. These carbon compounds represent the mobile energy reserves that plants use for respiration, osmotic adjustment, and resource allocation, and are important indicators of plant carbon status and stress tolerance. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Non-structural carbohydrate NA The amount of three-dimensional space occupied by a substance, object, or system, fundamental for calculating densities, concentrations, and spatial relationships. This geometric property is essential for quantifying habitat space, soil pore volume, water storage capacity, and scaling processes from molecular to ecosystem levels in environmental studies. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Volume": Volume. To quantify discharge or hydrograph volume or some other volume measurement. Volume NA The arrangement and organization of parts, components, or elements within a system, organism, or material that determines its properties and functions. This concept encompasses physical architecture, spatial relationships, and hierarchical organization that control system behavior and performance in biological and environmental systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Structure NA The amount of carbon dioxide present in a given volume of air or water, typically expressed in parts per million or other concentration units. This parameter controls photosynthetic rates, plant growth responses, ocean acidification, and serves as a key indicator of greenhouse gas levels and climate change impacts. CO2 concentration Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Carbon dioxide concentration NA The process by which organisms or environmental systems absorb, assimilate, or incorporate substances such as nutrients, water, or gases from their surrounding environment. This fundamental process controls resource acquisition, biogeochemical cycling, and the transfer of materials across biological and physical interfaces. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Uptake NA Compound of one aluminum(III) ion and three hydroxide groups, Al(OH)3, occurring both as the uncharged aqueous species in the stepwise hydrolysis of aluminum and as the solid whose dissolution controls aluminum solubility in soil. Al(OH)3 aluminum(III) hydroxide Covers both the dissolved species, Al(OH)3(aq), and the solid, Al(OH)3(s); the variable that names this term says which. The equilibrium between the two forms is BERVO:0000081. Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) Aluminum trihydroxide NA A chemical compound containing magnesium and hydrogen phosphate ions that affects the availability of both magnesium and phosphorus in soil and water systems. This compound influences nutrient cycling, soil chemistry, and plant nutrition by serving as a source of essential nutrients while affecting pH and ion equilibria. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Magnesium hydrogen phosphate NA Relating to solutions or environments where water serves as the solvent, encompassing most biological and many environmental chemical systems. This concept describes water-based systems where dissolved substances interact, chemical reactions occur, and biological processes take place in terrestrial and aquatic environments. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Aqueous NA The measurement of how broad an object extends from side to side, representing the horizontal dimension perpendicular to length. This spatial property is important for characterizing structural dimensions, habitat features, flow cross-sections, and geometric relationships that influence ecological processes and environmental functions. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Width NA A chemical element essential for plant growth, cellular processes, and osmotic regulation in all living organisms. This macronutrient controls enzyme activation, stomatal function, water relations, and plant stress tolerance while serving as a key component of soil fertility and agricultural productivity. K kalium Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "K": Expressed as potassium Potassium NA A chemical compound formed when an acid reacts with a base, or more broadly, any ionic compound that affects the salinity of soils and water bodies. These compounds influence osmotic stress, plant tolerance, soil structure, and water quality while representing major constraints on ecosystem functioning in arid and coastal environments. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Salt NA A chemical compound containing calcium and bicarbonate ions that occurs in natural waters and affects water chemistry and nutrient availability. This compound influences water hardness, pH buffering capacity, and serves as a source of both calcium nutrition and inorganic carbon in aquatic and terrestrial systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Calcium bicarbonate NA A microscopic pore in plant leaves and stems that regulates gas exchange between the plant and atmosphere, controlling carbon dioxide uptake and water vapor loss. These structures are fundamental for understanding photosynthesis, transpiration, water use efficiency, and plant responses to environmental conditions such as drought and atmospheric composition. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Stoma NA The amount of water present in a material such as soil, plant tissue, or atmospheric air, typically expressed as a percentage by mass or volume. This property controls biological activity, physical processes, material properties, and represents a fundamental parameter for understanding ecosystem functioning and environmental conditions. humidity Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Water Content": Quantity of water contained in a material or organism Water content NA Any compound or complex ion of aluminum and hydroxide groups, including the aqueous hydrolysis species of aluminum(III) and solid aluminum hydroxide minerals in soils and sediments. Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) Aluminum hydroxide NA An accumulation of compressed snow layers that persists over time, serving as a major component of seasonal water storage in mountainous and high-latitude regions. This frozen water reservoir affects regional hydrology, provides habitat for specialized organisms, influences surface albedo, and controls spring snowmelt and flood patterns. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Snowpack NA An anion derived from acetic acid that commonly occurs in biological systems and serves as an important intermediate in microbial metabolism. This organic ion plays roles in fermentation processes, carbon cycling, methanogenesis, and represents a key component of anaerobic decomposition in soils and sediments. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Acetate NA The portion of a plant stem located between two consecutive nodes, representing the elongated segment that contributes to plant height and structure. This anatomical feature affects plant architecture, mechanical properties, resource transport, and represents sites of stem elongation and structural development. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Internode NA A chemical element essential for chlorophyll structure, enzyme function, and cellular processes in all living organisms. This macronutrient affects photosynthesis, protein synthesis, and plant growth while serving as a key component of soil chemistry and agricultural fertility in terrestrial and aquatic ecosystems. Mg Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "Mg": Expressed as magnesium Magnesium NA The evolutionary and physiological adjustment of organisms to temperature conditions in their environment, affecting their survival, growth, and reproductive success. These adaptations control species distributions, ecosystem composition, and biological responses to climate change and temperature variability in different environmental contexts. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Thermal adaptation NA Fine-grained soil material composed of mineral particles smaller than 2 micrometers that strongly influences soil properties and ecosystem functioning. This soil component affects water retention, nutrient holding capacity, soil structure, and provides important surfaces for chemical reactions and microbial activity in terrestrial systems. adobe Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Clay": USDA particle size distribution category. Less then 0.002 mm diameter fine earth particles. Clay NA A chemical compound consisting of magnesium and carbonate ions that occurs naturally in soils and rocks and affects both magnesium nutrition and carbon cycling. This mineral influences soil pH, magnesium availability, and serves as both a source of plant nutrients and a component of carbonate weathering processes. MgCO3 Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Magnesium carbonate NA The proportion of phosphorus content relative to carbon content in biological materials, indicating stoichiometric relationships and nutrient status. This ratio influences decomposition rates, microbial activity, ecosystem productivity, and represents an important measure of nutrient limitation and biogeochemical cycling in environmental systems. P:C P:C ratio Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) P:C here means phosphorus to carbon, as in biogeochemical stoichiometry. In nutritional ecology P:C often means protein to carbohydrate, which is Protein to carbohydrate ratio (BERVO:8000038). Phosphorus to carbon ratio NA The portion of the electromagnetic spectrum, typically between 400 and 700 nanometers, that can be utilized by plants for photosynthesis. This energy source controls primary productivity, plant growth, canopy development, and serves as the fundamental driver of carbon assimilation and ecosystem energy capture in terrestrial and aquatic systems. PAR Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Photosynthetically active radiation NA The enzymatic function of ribulose-1,5-bisphosphate carboxylase/oxygenase, the key enzyme responsible for carbon dioxide fixation in photosynthesis. This biochemical process controls the rate of carbon assimilation, affects plant productivity, and represents a major constraint on ecosystem carbon uptake and primary productivity. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Move to variable? Rubisco activity NA The green pigment complex in plants and algae that captures light energy and converts it into chemical energy during photosynthesis. This essential biomolecule controls light harvesting efficiency, determines photosynthetic capacity, and serves as an indicator of plant health and ecosystem productivity in terrestrial and aquatic environments. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Chlorophyll NA The release or discharge of gases, particles, energy, or other substances from natural or anthropogenic sources into the environment. This process affects air quality, greenhouse gas concentrations, biogeochemical cycling, and represents both natural ecosystem functions and human impacts on environmental systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Chemical emission NA A spatial unit used in computational models and geographic information systems to represent discrete geographic areas for analysis and modeling purposes. These spatial elements enable the representation of continuous environmental variables, support spatial analysis, and facilitate the integration of data across different scales in earth system science. quadrat experimental unit Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Grid cell NA The developmental stage when a plant has completed its growth and reached reproductive capability, characterized by specific morphological and physiological changes. This life cycle stage affects resource allocation, reproductive success, harvest timing, and represents a critical transition point that influences ecosystem dynamics and agricultural productivity. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Plant maturity NA A chemical compound consisting of hydrogen and phosphate groups that serves as a source of phosphorus and affects soil acidity in terrestrial systems. This acid influences phosphorus availability, soil pH, mineral weathering, and serves as both a natural component of biogeochemical cycles and an important industrial chemical. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Phosphoric acid NA Hydrolysis species of iron(III) in which two hydroxide groups are bound to a single iron(III) ion, giving a net charge of 1+; the second species in the stepwise hydrolysis of ferric iron in soil solution. Distinct from iron(II) hydroxide, Fe(OH)2. Fe(OH)2(+) Iron dihydroxide Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) Iron(III) dihydroxide NA A pure chemical substance consisting of atoms with the same number of protons, representing the fundamental building blocks of all matter in environmental systems. These basic chemical units combine to form compounds and control the chemical composition, reactivity, and properties of materials in terrestrial and aquatic environments. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Element NA A tree that has died but remains upright in the forest canopy, providing important habitat structure and contributing to ecosystem functioning. These standing dead trees serve as wildlife habitat, affect forest structure, influence fire behavior, and represent important components of forest carbon storage and nutrient cycling. snag Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Dead standing tree NA Water present in the pore spaces of soil that is available for plant uptake, microbial activity, and chemical reactions. This essential component controls plant growth, nutrient transport, biogeochemical processes, and represents the primary medium for soil chemistry and biological activity in terrestrial ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Soil water NA The count of nodes present on a plant stem, representing the number of points where leaves, branches, or reproductive structures can emerge. This morphological parameter affects plant architecture, resource allocation, reproductive potential, and serves as an indicator of plant development and growth patterns. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Node number NA The seed-bearing reproductive structure of cereal plants such as corn and wheat that contains the harvestable grains. This agricultural organ determines crop yield, grain quality, and represents the economically important portion of cereal crops in agricultural production systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Ear NA The proportion of nitrogen content relative to carbon content in biological materials, indicating the stoichiometric relationship between these essential elements. This ratio influences decomposition rates, microbial activity, nutrient mineralization, and ecosystem responses to nutrient availability and environmental changes. N:C N:C ratio Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Nitrogen to carbon ratio NA A distinct horizontal section or stratum within a system such as soil, vegetation, or atmospheric structure that exhibits characteristic properties. These stratified components control vertical gradients, resource distribution, habitat diversity, and represent important organizational features in environmental and ecological systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Layer NA A numerical factor that expresses the quantitative relationship between variables in mathematical models and empirical equations used in environmental science. These parameters control model behavior, quantify process rates, and represent empirically derived or theoretically based constants that characterize environmental and ecological relationships. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Coefficient NA An anion consisting of one sulfur and four oxygen atoms that represents the most oxidized form of sulfur in environmental systems. This ion affects soil chemistry, plant nutrition, water quality, and serves as both an essential nutrient and a component of acid rain and mineral weathering processes. SO4 SO42- sulphate Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "SO4": Expressed as Sulfate Sulfate NA The visible and measurable features of an area of land including topography, vegetation, water bodies, and human modifications that create spatial patterns and ecological gradients. This spatial concept encompasses the mosaic of ecosystems, land uses, and environmental conditions that influence biodiversity, ecosystem services, and environmental processes at regional scales. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Landscape NA Data, materials, or energy that enters a system from external sources to be processed, transformed, or utilized by environmental or ecological processes. These inputs control system functioning, drive biogeochemical cycles, and represent the resources and driving forces that sustain ecosystem processes and environmental dynamics. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Input NA The products, results, or materials that emerge from a system following processing, transformation, or utilization of inputs by environmental or ecological processes. These outputs represent ecosystem services, waste products, energy transfers, and the measurable results of biogeochemical processes and environmental transformations. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Output NA The foundational category that serves as the parent classification for all conceptual terms in the Biological and Environmental Research Variable Ontology. This abstract class encompasses all non-variable concepts that describe entities, processes, and properties fundamental to understanding earth and environmental science systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) root class of ontology Concept NA The ratio of a substance's mass to its volume, representing a fundamental physical property that affects material behavior and environmental processes. This property controls buoyancy, mixing, stratification, and transport processes in fluids while influencing habitat structure and resource distribution in terrestrial and aquatic ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Density": Density Density NA A measure of a fluid's resistance to deformation and flow when subjected to shear or tensile stress, affecting the movement of liquids and gases in environmental systems. This property controls fluid flow rates, mixing processes, transport efficiency, and influences biological locomotion and material transport in aquatic and atmospheric environments. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Viscosity NA A measure of the amount of light absorbed by a material or substance as electromagnetic radiation passes through it, fundamental for understanding optical properties. This property affects photosynthesis, light penetration in water bodies, and remote sensing applications, and equals the negative decadic logarithm of transmittance in optical and environmental measurements. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Absorbance": The amount of radiation absorbed by a material Absorbance NA The numerical value assigned to a discrete quantity of objects, organisms, or events, fundamental for quantitative analysis in environmental and ecological studies. This measurement type enables population assessments, biodiversity quantification, and statistical analysis of discrete environmental variables and biological phenomena. quantity Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Count NA The continuous progression of existence that provides the temporal framework for all environmental processes, biological activities, and ecosystem dynamics. This fundamental dimension enables the measurement of process rates, seasonal cycles, long-term trends, and temporal relationships that characterize change and development in earth and environmental systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Time NA A representation of a specific day that provides temporal reference for environmental observations and events, typically including day, month, and year components. This temporal specification enables the timing of ecological events, tracking of environmental changes, and coordination of monitoring activities across different spatial and temporal scales. calendar date Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Date NA A representation of a specific moment in time that combines date and time components to provide precise temporal reference for environmental measurements and observations. This temporal specification includes day, month, year, hours, minutes, and potentially seconds, enabling precise timing of processes, events, and data collection in environmental and ecological studies. AmeriFlux records the start and end of each averaging period as TIMESTAMP_START and TIMESTAMP_END, and a single time as TIMESTAMP, in local standard time as YYYYMMDDHHMM. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) DateTime NA A measurable characteristic or attribute that describes the physical state or behavior of matter and energy in environmental systems. This concept encompasses properties such as temperature, density, conductivity, and pressure that govern physical processes in earth and environmental science applications. physical context Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Physical property NA A numerical or categorical representation that quantifies or describes the magnitude, intensity, or state of a measured or observed property. This concept encompasses all forms of data values used to characterize environmental variables and parameters in earth system science and ecological modeling applications. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Value NA A non-numerical representation that describes the categorical or descriptive characteristics of an environmental property or condition. This concept encompasses classifications, categories, and descriptive states used to characterize ecological conditions and environmental attributes in earth and environmental science studies. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Qualitative value NA A numerical representation that expresses the measurable magnitude or amount of an environmental property or variable. This concept encompasses all numerical measurements and calculated values used to quantify physical, chemical, and biological parameters in earth system science and environmental research. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Quantitative value NA A quantitative relationship that expresses the proportional magnitude of one environmental variable relative to another variable or reference value. This concept is fundamental for comparing different ecosystem components, expressing stoichiometric relationships, and standardizing environmental measurements across different scales and systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Ratio NA A discrete classification or grouping that organizes environmental variables, conditions, or entities into distinct types or classes. This concept is essential for organizing ecological data, defining habitat types, classifying environmental conditions, and structuring taxonomic and functional group classifications in environmental research. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Category NA A quantitative representation that expresses the proportional part of a whole environmental variable or system component. This concept is crucial for describing partial quantities, compositional relationships, and proportional distributions of materials, energy, or organisms within ecological and environmental systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Fraction NA A numerical representation that expresses the magnitude of an environmental variable in relation to a reference value, standard, or other variable. This concept encompasses normalized, standardized, and comparative measurements used to facilitate comparisons across different environmental conditions, spatial scales, and temporal periods. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Relative value NA A standard reference temperature of 25 degrees Celsius commonly used in environmental measurements and laboratory conditions for consistency and comparison purposes. This standardized temperature provides a baseline for chemical reaction rates, biological processes, and physical property measurements in earth and environmental science applications. room temperature 25 degrees Celsius 77 degrees Fahrenheit Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Standard ambient temperature NA The capacity of a substance to dissolve in a solvent under specific environmental conditions, typically expressed as concentration at equilibrium. This property controls the mobility and bioavailability of chemicals in soil and water systems, affecting nutrient uptake, contaminant transport, and geochemical processes in environmental systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Solubility NA A chemical element and noble gas that constitutes approximately 0.93% of Earth's atmosphere and serves as an important tracer in atmospheric and hydrological studies. This inert gas is used in environmental research for dating groundwater, studying atmospheric mixing processes, and as a reference standard in gas chromatography and other analytical techniques. Ar Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Argon NA The smallest or lowest value within a dataset, range, or distribution, representing the lower boundary of measured environmental variables. This statistical parameter is essential for characterizing environmental extremes, establishing baseline conditions, and understanding the full range of variability in ecological and environmental measurements. min Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Minimum NA The largest or highest value within a dataset, range, or distribution, representing the upper boundary of measured environmental variables. This statistical parameter is crucial for identifying environmental extremes, assessing system capacity, and understanding the full scope of variability in ecological and biogeochemical processes. max Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Maximum NA The sum or complete amount of a quantity representing the aggregate value of all components within a defined system or measurement period. This comprehensive measure is fundamental for mass balance calculations, ecosystem budgets, and quantifying cumulative effects in environmental and ecological studies. tot cumulative AmeriFlux BADM LAI_CANOPY_TYPE value: Total. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Total NA A geometric measurement that describes the spatial orientation or inclination between two intersecting lines, surfaces, or directions in environmental systems. This property is fundamental for characterizing slope gradients, solar angles, wind directions, and three-dimensional structural relationships in earth system science and ecological research. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Angle NA A trigonometric function that expresses the ratio of the opposite side to the hypotenuse in a right triangle, commonly used in environmental modeling applications. This mathematical concept is essential for calculating solar radiation components, wave phenomena, and periodic environmental processes in earth system science. sin Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Sine NA A trigonometric function that expresses the ratio of the adjacent side to the hypotenuse in a right triangle, frequently applied in environmental calculations. This mathematical concept is crucial for determining directional components, radiation geometry, and oscillatory patterns in atmospheric and ecological modeling applications. cos Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Cosine NA A water application method that delivers water directly to the root zone through underground distribution systems such as buried drip lines or subsurface emitters. This irrigation technique minimizes surface evaporation losses and provides efficient water delivery for agricultural and landscaping applications in earth system management. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) obsolete Suburface irrigation true NA A statistical measure that represents the central tendency of a dataset calculated as the sum of all values divided by the number of observations. This concept is fundamental for summarizing environmental data, characterizing average conditions, and providing representative values for ecosystem parameters in earth and environmental science research. average AmeriFlux marks an average across replicate sensors by replacing the replicate index with A in the positional qualifier (_H_V_A). Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Mean NA A one-dimensional measurement that quantifies the extent of an object or distance between two points in space. This property is essential for characterizing structural dimensions in ecosystems, measuring spatial scales, and defining geometric parameters in environmental modeling applications. span Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Length": Length is a measure of distance. Length NA A logarithmic scale that measures the acidity or alkalinity of aqueous solutions, ranging from 0 to 14 with 7 representing neutrality. This property is critical for characterizing soil chemistry, water quality, nutrient availability, and biological activity in terrestrial and aquatic environmental systems. acidity Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 speciation concept "pH": Expressed as pH. ODM2 variable name concept "pH": pH is the measure of the acidity or alkalinity of a solution. pH is formally a measure of the activity of dissolved hydrogen ions (H+). Solutions in which the concentration of H+ exceeds that of OH- have a pH value lower than 7.0 and are known as acids. pH NA The remaining amount of a quantity after accounting for opposing processes, losses, or deductions from the total value. This concept is fundamental for calculating net primary productivity, net ecosystem exchange, net radiation balance, and other net fluxes that characterize the overall direction and magnitude of environmental processes. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Net NA A measure of the reflectivity of a surface, expressed as the fraction of incident electromagnetic radiation that is reflected rather than absorbed. This property controls surface energy balance, influences local and regional climate, affects snow and ice persistence, and varies significantly among different land cover types and surface materials. non-reflected light Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Albedo": The ratio of reflected to incident light. Albedo NA The conversion of an inorganic substance into an organic compound through biological or chemical processes, most commonly referring to nitrogen or carbon fixation. This process is fundamental for understanding nutrient cycling, primary productivity, and the transformation of atmospheric gases into biologically available forms in terrestrial and aquatic ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Fixation NA A reference point representing the starting value, condition, or state of a system at the beginning of a measurement period or before a specified event occurs. This temporal reference is essential for calculating changes, rates, and responses in environmental monitoring, experimental studies, and long-term ecological research. start Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Group Curated Initial NA A reference point representing the ending value, condition, or state of a system at the conclusion of a measurement period or after a specified event has occurred. This temporal reference enables the quantification of change, response magnitude, and process outcomes in environmental studies and ecosystem monitoring applications. end Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Final NA The amount of mass per unit area, expressing the distribution of material across a two-dimensional surface rather than within a three-dimensional volume. This property is important for characterizing biomass distribution, pollutant loading, precipitation amounts, and other environmental quantities that vary spatially across landscapes and surfaces. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Area density NA A kinetic parameter that defines the substrate concentration at which an enzyme-catalyzed reaction proceeds at half its maximum rate, indicating enzyme-substrate affinity. This constant is fundamental for understanding enzyme kinetics, metabolic regulation, and nutrient uptake processes in biological systems and environmental biogeochemistry. Km Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Michaelis constant": The Michaelis constant is the substrate concentration at which the reaction rate is half of Vmax. Vmax represents the maximum rate achieved by the system, at saturating substrate concentration Michaelis constant NA A kinetic parameter that quantifies the concentration of an inhibitor required to reduce enzyme activity to half of its maximum rate. This constant is essential for understanding enzyme regulation, metabolic control, and biochemical inhibition processes in biological systems and environmental biogeochemistry. Ki Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Inhibition constant NA A proportionality constant that relates the rate of a chemical or physical process to the concentrations or activities of the participating reactants. This parameter is fundamental for quantifying reaction kinetics, transformation processes, and temporal dynamics in biogeochemical and environmental modeling applications. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Rate constant NA A thermodynamic parameter that quantifies the relative concentrations of reactants and products when a chemical reaction reaches equilibrium at a given temperature. This constant is essential for understanding chemical stability, phase relationships, and geochemical processes in environmental systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Equilibrium constant NA A thermodynamic parameter that quantifies the tendency of a compound to dissociate into its constituent ions or components in solution. This constant is crucial for understanding acid-base chemistry, ion speciation, and chemical equilibria in soil and water systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Dissociation constant NA The rate of thermal energy transfer per unit area across a surface or interface, typically measured in watts per square meter. This concept is fundamental for understanding energy balance, temperature regulation, and thermal processes in atmospheric, terrestrial, and aquatic environmental systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Heat flux NA A layer of tightly packed cells that surrounds the vascular bundles in plant leaves, particularly prominent in C4 plants. This anatomical structure plays a crucial role in photosynthetic carbon concentration mechanisms and is important for understanding plant physiological adaptations and carbon fixation efficiency in different environmental conditions. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Bundle sheath NA The internal leaf tissue located between the upper and lower epidermis where most photosynthesis occurs in plant leaves. This tissue contains chloroplast-rich cells and provides the primary site for carbon dioxide fixation and oxygen production, making it essential for understanding plant productivity and ecosystem carbon cycling. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Mesophyll NA Electromagnetic energy emitted by the sun that reaches Earth's surface and drives most environmental and biological processes. This energy source controls photosynthesis, evapotranspiration, weather patterns, and climate dynamics, making it fundamental to earth system science and ecosystem functioning. sunlight Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Solar radiation NA The rate at which a substance undergoes oxidation normalized by the mass, area, or volume of the substance itself, providing a standardized measure of oxidative activity. This parameter is important for comparing oxidation processes across different materials, environments, or experimental conditions in biogeochemical and environmental chemistry studies. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Specific oxidation rate NA The rate of air movement in the atmosphere, typically measured as the magnitude of horizontal air velocity near Earth's surface. This meteorological parameter controls evapotranspiration rates, heat transfer, mechanical stress on vegetation, and atmospheric mixing processes in environmental systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Wind speed NA A temporal scale representing a complete annual cycle of 365 or 366 days, encompassing all seasonal variations and annual patterns. This time period is fundamental for characterizing long-term environmental trends, annual cycles of ecosystem processes, and interannual variability in earth system science. annual Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Yearly NA A temporal scale representing approximately one-twelfth of an annual cycle, typically spanning 28 to 31 days depending on the specific month. This time period is important for characterizing seasonal transitions, monthly climate patterns, and intermediate-term environmental processes in ecosystem monitoring and modeling. per month Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Monthly NA A temporal scale representing a seven-day period used for organizing environmental observations and management activities. This time period is useful for characterizing short-term environmental variability, management cycles, and human-influenced patterns in agricultural and urban environmental systems. per week Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Weekly NA A temporal scale representing a 24-hour period corresponding to one complete rotation of Earth relative to the sun. This fundamental time unit captures diurnal cycles of solar radiation, temperature, and biological activity that drive many environmental and ecological processes. per day Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Daily NA A temporal scale representing a one-hour period used for characterizing short-term environmental fluctuations and rapid process dynamics. This time resolution is essential for capturing diurnal patterns, meteorological variations, and fine-scale temporal changes in atmospheric and ecological systems. per hour Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Hourly NA Phosphorus-containing organic compounds that are dissolved in water and available for biological uptake and transformation. This form of phosphorus represents an important nutrient pool in aquatic ecosystems and soil solutions, controlling primary productivity and biogeochemical cycling in freshwater and marine environments. DOP Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Dissolved organic phosphate NA A large, relatively permanent body of water that is surrounded by land and disconnected from the ocean, serving as an important freshwater ecosystem. These aquatic systems support diverse biological communities, regulate local climate, provide water resources, and serve as sentinels of environmental change in watershed and regional environmental studies. loch pond pool Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 site type concept "Lake, Reservoir, Impoundment": An inland body of standing fresh or saline water that is generally too deep to permit submerged aquatic vegetation to take root across the entire body (cf: wetland). This site type includes an expanded part of a river, a reservoir behind a dam, and a natural or excavated depression containing a water body without surface-water inlet and/or outlet. Lake NA Material derived from the remains, waste products, or secretions of living organisms that contains carbon-based compounds essential for ecosystem functioning. This material serves as a source of nutrients, energy, and soil structure while controlling decomposition processes, carbon sequestration, and habitat quality in terrestrial and aquatic environments. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Organic matter": The organic matter component of a complex material. Organic matter NA The total amount of thermal energy contained within a system that can be released or absorbed during physical or chemical processes at constant pressure. This property controls phase transitions, chemical reaction rates, and energy balance processes that influence ecosystem functioning and environmental dynamics in terrestrial and aquatic systems. enthalpy total heat Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Heat content NA The maximum amount of useful work that can be extracted from a chemical or physical process occurring at constant temperature and pressure, indicating process spontaneity and feasibility. This thermodynamic parameter is fundamental for understanding chemical equilibria, phase transitions, and energy transformations in biogeochemical and environmental processes. Free enthalpy Gibbs energy Gibbs function available energy delta G delta-G ΔG Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Gibbs free energy change NA A quantification of the complexity and indirect nature of pathways within porous media such as soils or sediments, calculated as the ratio of actual flow path length to straight-line distance. This property controls fluid flow rates, diffusion processes, and transport efficiency in groundwater systems, soil hydraulics, and biogeochemical transport modeling applications. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Tortuosity NA The rate at which organisms or environmental systems absorb, assimilate, or incorporate substances from their surrounding environment. This concept encompasses processes such as nutrient uptake by plants, gas exchange rates, and contaminant absorption, which are fundamental for understanding ecosystem functioning and biogeochemical cycling. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Uptake rate NA A localized zone or layer within the soil profile that has distinct properties, composition, or management treatments different from the surrounding soil matrix. This concept is important for precision agriculture, nutrient management, and understanding spatial heterogeneity in soil physical, chemical, and biological properties. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) obsolete Soil band true NA The bulk soil matrix that exists outside of specific treated or modified zones, representing the background soil conditions in agricultural or managed systems. This concept provides a reference state for comparing the effects of localized treatments such as fertilizer bands, tillage zones, or root-influenced areas. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) obsolete Soil non-band true NA A dimensionless unit of measurement that expresses a proportion or fraction as parts per hundred, widely used for reporting concentrations and relative quantities. This concept is fundamental for expressing composition ratios, efficiency measures, and proportional relationships in environmental and ecological data presentation. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Percent NA A measure of the cloudiness or haziness of water caused by suspended particles that scatter and absorb light passing through the water column. This optical property is an important indicator of water quality, affecting light penetration for aquatic photosynthesis and serving as a proxy for suspended sediment concentrations in freshwater and marine systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) ODM2 variable name concept "Turbidity": Turbidity Turbidity NA The continuous directional movement of a fluid such as water or air driven by pressure gradients, temperature differences, or density variations within environmental systems. These movements control mass transport, energy distribution, and mixing processes that influence ecosystem structure, nutrient cycling, and pollutant dispersal in atmospheric, hydrologic, and oceanographic environments. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Fluid current NA The total quantity or weight of organisms in a given area or volume. It may refer to the mass of a taxonomic group or of all species in a community. Definition source - Manual (JHC, Sep 29 2025) ODM2 variable name concept "Biomass": Mass of living biological organisms in a given area or ecosystem at a given time. If this generic term is used, the publisher should specify/qualify the species, class, etc. being measured in the method, qualifier, or other appropriate field. ODM2 variable name concept "Biomass, total": Total biomass. Biomass NA The proportion of energy derived from respiration that is successfully converted into new plant biomass or tissue, rather than being lost as heat or used for maintenance respiration. It is a key factor in understanding a plant's or microorganism's overall carbon use efficiency (CUE), indicating how effectively assimilated energy is allocated to growth. Definition source - Manual (JHC, Sep 29 2025) Growth respiration efficiency NA Metadata that describes the overall design, setup, and conditions of an experimental system. This includes information about the rationale, hypotheses, and organizational structure of the experiment, essential for understanding the scientific context and reproducibility of research findings. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Experimental context NA A categorical descriptor specifying whether a data series represents temporal measurements, replicates, treatment variations, or other organizational structures. This classification enables proper interpretation of data relationships and appropriate statistical analysis methods in experimental datasets. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Series type NA A sequence of observations or measurements recorded at regular or irregular time intervals, allowing analysis of temporal trends, patterns, and dynamics. Time series data is fundamental for understanding process evolution, forecasting, and identifying periodic or long-term changes in environmental, biological, and physical systems. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Time series NA Multiple independent measurements or samples collected under identical or nearly identical conditions to assess measurement variability, reproducibility, and statistical robustness. Replicates include biological replicates (different organisms or samples) and technical replicates (repeated measurements on same sample), both critical for quantifying experimental uncertainty and establishing confidence in results. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Replicate series NA A descriptive statement specifying the particular set of environmental, chemical, biological, or physical circumstances under which an experiment or observation occurs. Conditions define the parameters being tested and are essential for interpreting results and enabling comparative analysis across different experimental treatments. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Condition NA A detailed description of the procedures, protocols, techniques, and instrumental approaches employed to collect data or conduct measurements. Methods documentation ensures experimental transparency, reproducibility, and allows other researchers to critically evaluate the validity and applicability of findings. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Method NA A configurable input value or setting that controls the behavior and performance of a computational algorithm. Algorithm parameters include thresholds, weighting factors, iteration limits, and other tunable variables that significantly influence data processing outcomes and result interpretation. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Algorithm parameter NA Textual notes or annotations providing context, clarification, or additional information about experimental data, methods, or results. Comments serve as informal metadata that can document unexpected observations, data quality concerns, or interpretive insights that enhance understanding of research findings. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Comment NA The analytical or measurement device employed to collect data, including specifications such as make, model, serial number, and calibration information. Instrument selection critically influences measurement accuracy, precision, and comparability across studies, making detailed documentation essential for data quality assessment and method standardization. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) ODM2 medium concept "Equipment": An instrument, sensor or other piece of human-made equipment upon which a measurement is made, such as datalogger temperature or battery voltage. Instrument NA Environmental or metabolic conditions characterized by the absence or near-absence of dissolved oxygen. Anaerobic processes are prevalent in waterlogged soils, sediments, and water bodies, driving anaerobic respiration, methanogenesis, and other biochemical transformations critical to biogeochemical cycling in anoxic environments. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Anaerobic NA Environmental or metabolic conditions in which dissolved oxygen is present at concentrations sufficient to support aerobic respiration and oxidative metabolic pathways. Aerobic conditions predominate in well-drained soils, water column surface layers, and are generally favorable for rapid organic matter decomposition and energy availability in ecosystems. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Aerobic NA Descriptive information regarding mathematical operations, transformations, or analytical frameworks applied to data. This includes information about scaling approaches, normalization procedures, and mathematical conventions used in data processing and interpretation. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Mathematical context NA A descriptive specification indicating the reference state, baseline, or comparative standard against which a measurement is expressed. This provides essential context for interpreting values that represent changes, differences, or ratios relative to a defined reference condition. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Relative NA Information describing the chemical environment, reaction conditions, molecular interactions, or the role of specific molecules within chemical processes or experimental systems. Chemical context includes reaction type, substrate role, product formation, and chemical mechanistic information. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Chemical context NA A specification of chemical identity when molecular composition or structure varies as a dimension in experiments or datasets. This concept enables tracking of chemical diversity in reaction systems, metabolic pathways, or multi-component analyses where different molecules are analyzed or compared. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Molecule NA A description of a chemical or biochemical transformation specifying reactants, products, reaction conditions, and mechanistic information. Reaction descriptions enable understanding of stoichiometry, energy requirements, and biological or environmental significance of chemical processes. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Reaction NA A categorical description of the physical surface on which interactions, reactions, or adsorption processes occur, such as mineral surfaces, organic matter, biofilm matrices, or interface boundaries. Surface type critically influences reaction rates, mass transport, and binding affinities in environmental and biological systems. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Surface type NA A specification of the material composition and surface properties of beads used in laboratory experiments such as soil homogenization, grinding, or chemical extraction procedures. Bead type selection affects contamination risk, extraction efficiency, and final sample composition in geochemical and biogeochemical analyses. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Bead type NA The physical diameter or volume specifications of beads employed in soil or tissue homogenization and chemical extraction procedures. Bead size directly influences grinding efficiency, shear forces, and the uniformity of particle size distribution in processed samples. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Bead size NA The change in enthalpy (ΔH) representing the heat energy absorbed or released during a chemical reaction at constant pressure. Delta-H is fundamental for assessing reaction spontaneity, thermodynamic feasibility, and energy requirements in biogeochemical processes and environmental chemistry applications. deltaH ΔH Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Delta-H NA The catalytic activity of an enzyme normalized to protein mass, expressed as units of product formed per unit time per unit protein. Specific activity quantifies enzyme efficiency and purity, enabling standardization of enzyme measurements and comparison of catalytic performance across different protein preparations. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Specific activity NA The distance between successive peaks or troughs of electromagnetic radiation, determining the energy and spectral characteristics of light. Wavelength specifications are critical for spectroscopy, photometry, and light-dependent processes such as photosynthesis and phototaxis in environmental and biological studies. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Wavelength NA A descriptor of the physical and chemical status of matter including phase (solid, liquid, gas), solubility state, sorption status, or location within environmental compartments. This concept specifies whether substances are dissolved, suspended, sorbed, or present in particular environmental matrices, affecting their bioavailability and environmental fate. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Physicochemical state NA The minimum concentration, mass, or signal intensity that can be reliably distinguished from background noise by an analytical instrument or method. Detection limits define the lower boundary of quantitative measurement ranges and are critical for data quality assessment and comparison of analytical capabilities. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Detection limit NA Information describing the biological setting, organismal status, population characteristics, or ecological relationships relevant to a measurement or observation. Biological context includes organism identity, life stage, metabolic state, and ecological role, essential for interpreting biological and biogeochemical data. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Biological context NA A genetically distinct population of microorganisms identified by strain designation, culture collection number, or isolate designation. Microbial strain specification is essential for reproducibility of microbiological research and enables tracking of specific phenotypic or genotypic characteristics across experiments. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Microbial strain NA The taxonomic classification of an organism at various hierarchical levels including species, genus, family, or higher ranks. Taxon designation enables biological identification, comparative analysis, and linking of experimental data to phylogenetic and ecological frameworks. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Taxon NA The nutrient-containing liquid, semi-solid, or solid preparation used to culture microorganisms or cells. Media selection influences organism growth, metabolic activity, and community structure in laboratory experiments and is critical for replicability and standardization of microbial research. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Media NA A specification of the chemical constituents, nutrient elements, and trace components comprising growth media. Media composition documentation enables reproducibility and understanding of how nutrient availability and chemical environment influence organism growth and metabolism. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Media composition NA Amendments or supplements added to culture media such as vitamins, growth factors, chelating agents, or specialized compounds. Media additions enable targeted modification of growth conditions and selective cultivation of organisms with specific nutritional or physiological requirements. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Media addition NA The compound or element used as a nitrogen supply for microbial or plant growth, including inorganic forms (nitrate, ammonium) and organic forms (amino acids, proteins). Nitrogen source type influences microbial community composition and metabolic pathways in biogeochemical cycling. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Nitrogen source NA The reduced chemical compound that serves as the primary energy source for microbial oxidative metabolism and growth, such as hydrogen, sulfide, iron(II), or organic matter. Electron donor identity determines the thermodynamic driving force and metabolic type of microorganisms in environmental systems. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Electron donor NA The oxidized chemical species that serves as the terminal electron acceptor in microbial respiration, including oxygen, nitrate, sulfate, iron(III), and other inorganic compounds. Electron acceptor availability determines the thermodynamic favorability and type of respiration (aerobic, anaerobic) in biogeochemical systems. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Electron acceptor NA A functional unit of heredity encoding protein sequences or regulatory RNAs that govern organism phenotype and metabolic capability. Gene designation enables linking of genomic information with functional traits and ecological characteristics in biogeochemical and evolutionary research. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Gene NA The GenBank identifier (GI number) serving as a unique accession reference for specific gene sequences in public databases. GI numbers enable unambiguous linking of experimental data to specific genetic sequences and facilitate bioinformatic analyses. genbank ID genbank accession gene ID Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Gene GI NA A functional macromolecule composed of amino acids that catalyzes reactions, provides structural support, and regulates cellular processes. Protein characterization and quantification are fundamental for understanding enzyme activity, metabolic capacity, and biochemical function in organisms and environmental systems. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Protein NA A functional classification system from the KEGG database that groups genes and proteins involved in specific metabolic or signaling pathways. KEGG subsystem annotations enable systematic analysis of organism metabolic capabilities and prediction of functional roles in biogeochemical cycling. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) KEGG subsystem NA A functional classification system from The Institute for Genomic Research (TIGR) that assigns functional roles to proteins based on sequence homology and structural similarities. TIGR roles enable systematic functional annotation and comparative metabolic analysis across microbial genomes. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) TIGR role NA The unique identifier for protein domain families in the Pfam database representing evolutionarily related protein domains with conserved structures and functions. Pfam domain accessions enable identification of functional motifs and comparative protein evolution analysis. pfam ID Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Pfam domain accession NA The increase in organism biomass, cell number, or population size per unit time, quantifying the speed of biological growth under specific conditions. Growth rate measurements are fundamental for assessing organism fitness, evaluating culture performance, and determining population dynamics in microbial and ecological studies. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Growth rate NA The time interval required for a population to double in size during exponential growth phase. Doubling time is a key parameter characterizing organism growth rate and is essential for assessing growth kinetics and comparing growth performance under different conditions. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Doubling time NA The elapsed time interval from introduction of organisms into culture media until the time of sampling or measurement. Time since inoculation is essential for relating growth measurements to the exponential, stationary, or death phases of microbial growth curves. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Time since inoculation NA The hierarchical rank within the Linnaean classification system (kingdom, phylum, class, order, family, genus, species) at which an organism is identified. Taxonomic level specification determines the resolution and precision of biological classification and affects interpretation of biodiversity and community composition. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Taxonomic level NA The observable phenotypic or functional consequence resulting from genetic modification, strain substitution, or evolutionary changes in a microbial population. Strain change effects provide insights into genotype-phenotype relationships and the adaptive significance of genetic variations in experimental and environmental contexts. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Strain change effect NA A physical specimen collected from natural environments such as soils, waters, sediments, or organisms, representing a specific location and time. Environmental samples are fundamental for characterizing ecosystem conditions, tracking environmental changes, and conducting field-based biogeochemical research. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Environmental sample NA A measurable property of the physical, chemical, or biological environment such as temperature, pH, moisture content, or nutrient concentration. Environmental parameters characterize the conditions influencing organism function and biogeochemical processes in natural and managed ecosystems. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Environmental parameter NA The mechanisms and processes through which biological communities develop and stabilize over time, including colonization, competition, facilitation, and stochastic processes. Community assembly processes determine ecosystem structure, functional redundancy, and resilience to environmental disturbances. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Community assembly process NA The categorization of sequencing reads based on their origin (single-end vs. paired-end) and structural characteristics (full-length, 16S, metagenome, transcriptome). Read type specification is essential for appropriate bioinformatic processing and interpretation of molecular data. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Read type NA The platform and methodology used for DNA or RNA sequencing, including next-generation sequencing (Illumina, PacBio, Nanopore) and traditional approaches. Sequencing technology selection critically affects read quality, read length, throughput, and cost of molecular analyses. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Sequencing technology NA A quantitative or qualitative determination of a physical, chemical, or biological property using established protocols and calibrated instruments. Measurement accuracy and precision are fundamental to data quality and scientific reproducibility across all empirical research. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Measurement NA Ability of a material to transmit a flow of electric charge, heat, or fluid in proportion to the gradient that drives it. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 Conductivity NA The electron activity or oxidation-reduction potential of a solution, measured in millivolts, indicating the tendency of substances to be oxidized or reduced. Redox potential controls the solubility and bioavailability of elements and drives major biogeochemical transformations in environmental systems. oxidation-reduction potential ORP reduction potential Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) ODM2 variable name concept "Reduction potential": Oxidation-reduction potential Redox potential NA The physical dimension or scale of an object, organism, or particle measured in linear units (length, width, height, diameter). Size measurements are fundamental for characterizing physical properties, particle distributions, and organism morphology in biogeochemical studies. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Size NA The signal strength or fluorescence intensity resulting from molecular hybridization between labeled probes and complementary sequences. Hybridization intensity measurements are fundamental for microarray analysis, enabling quantification of nucleic acid abundance and identification of genomic variations. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Hybridization intensity NA The quantitative measure of gene or protein abundance in a cell, tissue, or organism reflecting the activity of genetic regulation. Expression level measurements are essential for understanding functional gene activity, metabolic capacity, and stress responses in biogeochemical contexts. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Expression level NA The catalytic efficiency of an enzyme measured as the rate of substrate conversion per unit enzyme or per unit time. Enzyme activity measurements quantify metabolic function and are critical for assessing organism capability to perform specific biogeochemical transformations. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Enzyme activity NA A quantitative measure of organism survival, reproduction, or competitiveness relative to wild-type or reference strains. Fitness scores enable assessment of genetic variants' ecological and physiological consequences in laboratory and environmental contexts. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Fitness score NA A quantitative measure of synergistic or antagonistic effects between two genetic mutations or perturbations beyond their individual contributions. Genetic interaction scores reveal epistatic relationships and functional interdependencies between genes in complex biological systems. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Genetic interaction score NA The proportional relationship between reactants or products in chemical or biochemical reactions based on molecular formulas. Stoichiometric ratios are fundamental for calculating reaction yields, energy requirements, and elemental cycling rates in biogeochemical models. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Stoichiometric ratio NA A data format or classification system with two mutually exclusive states or categories (yes/no, present/absent, true/false). Binary representations enable efficient storage and analysis of presence-absence data and dichotomous properties in large datasets. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Binary NA A Boolean property indicating the occurrence or detection of a substance, organism, genetic element, or phenotype in a sample or environment. Presence data enables community composition analysis and tracking of specific organisms or traits across samples. extant Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Presence NA A Boolean property indicating whether a gene, protein, or metabolic function is required for organism survival under specified conditions. Essentiality assessments reveal functionally critical genes and identify metabolic bottlenecks in biotechnology and evolutionary studies. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Essentiality NA A numerical summary or descriptive measure derived from data that characterizes properties of the sample or population. Statistics are essential tools for data analysis, hypothesis testing, and inference in empirical scientific research. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Statistic NA The arithmetic result of subtracting one value from another, quantifying the magnitude of change or contrast between two measurements. Differences are fundamental for assessing treatment effects, temporal trends, and comparative analysis across conditions. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Difference NA A measure of data dispersion quantifying how individual values deviate from the mean, expressed in the same units as the original data. Standard deviation is essential for assessing measurement variability and comparing precision across different datasets and methods. AmeriFlux variable-name qualifier: _SD, the spatial standard deviation across replicate sensors; AmeriFlux's _SIGMA variables are standard deviations over time within an averaging period, and map here too. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Standard deviation NA The standard deviation of the sampling distribution of a statistic, quantifying uncertainty in sample-based estimates. Standard error is critical for confidence intervals and hypothesis testing in statistical inference. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Standard error NA The central value in a distribution that divides the data into equal halves when ranked in order. The median is a robust measure of central tendency less affected by outliers than the mean. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Median NA The logarithmic transformation of the ratio between two values, widely used for data visualization and statistical analysis of fold-changes and relative abundances. Log ratios stabilize variance and linearize exponential relationships in biological data. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Log ratio NA The probability of observing test statistics as extreme as or more extreme than the observed value under the null hypothesis. P-values are fundamental for statistical hypothesis testing and determining significance of research findings. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) P value NA A statistical test value derived from t-tests used to compare means between groups and assess significance of differences. T-scores quantify the ratio of difference to variability and are fundamental for parametric hypothesis testing. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) T score NA The number of occurrences or repetitions of an event or observation within a defined interval or dataset. Frequency is fundamental for describing the distribution of categorical and quantitative variables in statistical analysis. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Frequency NA A ratio measure comparing the observed frequency or concentration of a feature relative to its expected or baseline value. Fold enrichment quantifies whether an outcome is more or less common than would be expected by chance. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Fold enrichment NA A measure of certainty or trust in an estimate, prediction, or result, often expressed as a confidence level or confidence interval. Confidence reflects the degree of reliability in statistical inference and data interpretation. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Confidence NA The proportion of predicted positive cases that are actually true positive, measuring the exactness and reliability of predictions. High precision indicates low false positive rate in classification tasks. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Precision NA The proportion of actual positive cases that are correctly identified by a prediction model, also known as sensitivity or true positive rate. High recall indicates comprehensive detection of true positive cases. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Recall NA An instance where a prediction or test correctly identifies the presence of a condition or feature when it is actually present. True positives are a key metric for evaluating classifier performance and diagnostic accuracy. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) True positive NA An instance where a prediction or test incorrectly identifies the presence of a condition or feature when it is actually absent. False positives represent incorrect positive predictions and affect specificity metrics. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) False positive NA An instance where a prediction or test correctly identifies the absence of a condition or feature when it is actually absent. True negatives measure correct rejection of the null hypothesis in hypothesis testing. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) True negative NA An instance where a prediction or test incorrectly fails to identify the presence of a condition or feature when it is actually present. False negatives represent missed detections and affect sensitivity metrics. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) False negative NA A statistical measure of the strength and direction of the linear relationship between two continuous variables. Correlation values range from -1 to +1 and are essential for understanding variable associations. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Correlation NA A parametric correlation coefficient measuring the linear relationship between two continuous variables, assuming normal distribution. Pearson correlation is widely used for assessing strength of linear association in statistical analysis. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Pearson coefficient NA A non-parametric rank-based correlation coefficient measuring monotonic relationships between two variables without assuming normality. Spearman correlation is robust to outliers and applicable to ordinal data. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Spearman coefficient NA A non-parametric rank correlation coefficient measuring the strength of association between two variables based on concordant and discordant pairs. Kendall tau is distribution-free and suitable for small sample sizes. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Kendall tau coefficient NA A measure of association for ordinal variables that quantifies agreement between two ordinal rankings, accounting for tied observations. Gamma ranges from -1 to +1 and is less affected by table marginals. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Goodman and Kruskal's gamma NA A categorical variable or grouping variable that divides data into different levels or groups for analysis. Factors are essential for stratification, blocking, and categorical analysis in experimental design. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Factor NA The correlation or weight indicating the contribution of an observed variable to a latent factor in factor analysis. Factor loadings quantify the relationship between variables and underlying factors. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Factor loading NA A linear combination of original variables that captures maximum variance in multivariate data with minimal dimensionality. Principal components are orthogonal and ordered by descending variance. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Principal component NA Operational Taxonomic Unit, a grouping of sequences within a specified sequence similarity threshold used in microbial community analysis. OTUs approximate species-level groups in 16S rRNA gene sequencing. OTU Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Operational Taxonomic Unit NA Amplicon Sequence Variant, an exact biological sequence variant identified in high-throughput sequencing that represents true molecular entities. ASVs offer higher resolution than OTUs for microbial community characterization. ASV Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Amplicon Sequence Variant NA The complementary DNA strand designated as plus (5' to 3') or minus (3' to 5'), indicating directional orientation of genetic sequence. DNA strand designation is critical for sequence annotation and interpretation. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Strand NA The classification or category of a nucleic acid or protein sequence such as DNA, RNA, or amino acid sequences. Sequence type designation specifies the chemical nature and interpretation of sequence data. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Sequence type NA A geographic region observing a uniform standard time, defined relative to Coordinated Universal Time (UTC). Time zones are essential for accurate temporal annotation in geographically distributed studies. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Time zone NA A text narrative providing explanatory details about an object, process, or observation. Descriptions document context, methods, and characteristics necessary for interpretation and reproducibility. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Description NA A uniform resource identifier (URI) such as a DOI (Digital Object Identifier) or URL (Uniform Resource Locator) referencing external data or publications. Links enable access to related information and data provenance. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Link NA The category of methodology employed to generate data, including sequencing, spectroscopy, cultivation, or measurement techniques. Experimental process classification enables assessment of method-specific biases and comparability. experimental process Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Experimental process type NA A coordinated series of observations, measurements, or activities conducted over a defined temporal or spatial scope. Campaigns organize related data collection efforts for a specific research objective. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Campaign NA A geographic point or area where observations, measurements, or samples are collected or sourced. Location information is essential for spatial analysis and environmental characterization. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Location NA The angular distance north or south of the equator measured in degrees, minutes, and seconds (or decimal degrees). Latitude specifies the north-south coordinate in geographic positioning systems. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) ODM2 variable name concept "Latitude": Latitude as a variable measurement or observation (Spatial reference to be designated in methods). This is distinct from the latitude of a site which is a site attribute. Latitude NA The angular distance east or west of the Prime Meridian measured in degrees, minutes, and seconds (or decimal degrees). Longitude specifies the east-west coordinate in geographic positioning systems. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) ODM2 variable name concept "Longitude": Longitude as a variable measurement or observation (Spatial reference to be designated in methods). This is distinct from the longitude of a site which is a site attribute. Longitude NA One of the major landmasses on Earth (Africa, Antarctica, Asia, Europe, North America, Oceania, South America). Continent designation provides high-level geographic classification for spatial analysis. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Continent NA A distinct political entity with recognized international sovereignty and defined geographic boundaries. Country classification is fundamental for regulatory, ecological, and socioeconomic stratification. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Country NA A large-scale ecosystem characterized by distinctive climate, vegetation, fauna, and biogeochemical processes. Biome classification provides context for understanding local environmental conditions and biodiversity patterns. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Biome NA Material part of the environment with a location and an extent on or in which observations are made, such as a water body, a landform, a glacier, or the atmosphere. COMO:0000217 defines this as a characteristic of the environment, such as elevation or soil type. BERVO redefined it as a material part of the environment when the ODM2 site type features were placed beneath it, and keeps the COMO reference for provenance. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 Environmental feature NA The classification of observed change in microbial strain properties including phenotypic, genotypic, or virulence changes. Strain change documentation tracks microbial evolution and adaptation. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Strain change type NA The physical substrate or substance collected from the environment for analysis such as soil, water, sediment, or air. Environmental material characterization specifies the source compartment of measured variables. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Environmental material NA An assemblage of populations of different species living and interacting within a defined spatial area. Community composition reflects species diversity, abundance, and ecological interactions. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Community NA The classification of communities based on dominant species, structure, or environmental characteristics. Community types enable comparative analysis across ecosystems. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Community type NA A contiguous DNA sequence assembled from multiple overlapping sequence reads. Contigs are fundamental units in genome assembly and provide continuous coverage of genomic regions. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Contig NA The position number marking the beginning of a sequence segment within a reference genome or sequence assembly. Start position enables precise genomic localization. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Sequence start NA The position number marking the terminus of a sequence segment within a reference genome or sequence assembly. Stop position defines the boundaries of genomic features. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Sequence stop NA The total number of nucleotides or amino acids in a DNA, RNA, or protein sequence. Length measurement is essential for sequence characterization and annotation. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Sequence length NA The complete set of genetic material contained in an organism including chromosomal and extrachromosomal DNA. Genome sequences provide comprehensive information about genetic composition. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Genome NA A collection of short nucleotide sequences generated by high-throughput sequencing instruments. Read sets form the basis for sequence assembly and sequence-based analyses. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Read set NA A chemical compound detected or quantified in environmental samples including natural and anthropogenic substances. Environmental chemical identification enables assessment of environmental contamination and chemical cycling. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Environmental chemical NA A quantitative determination of a physical or chemical property of the environment such as temperature, pH, or concentration. Environmental measurements document conditions influencing biological processes. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Environmental measurement NA The identifier for a transposon insertion mutant library generated for transposon sequencing (Tn-Seq) analysis. Library names track different mutant collections used in fitness experiments. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Tn-Seq library name NA The design specification or sequence of primers used for PCR amplification in Tn-Seq library preparation. Primer design affects sequence recovery and amplification efficiency. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Tn-Seq primers model NA A linear arrangement of nucleotides (DNA/RNA) or amino acids (protein) in a specific order. Sequences encode genetic and functional information. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Sequence NA A sample or condition maintained under standardized conditions to serve as a reference point for comparison. Controls enable assessment of experimental effects and data quality. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Control NA A sample expected to yield no detection or effect, used to verify assay specificity and absence of background contamination. Negative controls ensure absence of false positive signals. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Negative control NA A sample known to produce a positive result or signal, used to verify assay sensitivity and functional capability. Positive controls confirm detection system functionality. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Positive control NA Repeated measurements of the same sample processed independently through the same protocol. Technical replicates quantify measurement precision and instrument variation. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Technical replicate NA Measurements from distinct biological samples generated from different organisms or conditions within the same treatment group. Biological replicates measure biological variability. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Biological replicate NA A sample derived from a larger parent sample by division or extraction. Subsampling enables multiple independent analyses from limited material. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Subsample NA The identifier or label assigned to a measured property or quantity in a dataset. Variable names enable reference and organization of data attributes. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Variable name NA The classification of variable types including categorical, ordinal, continuous, or other data types. Classification specifies appropriate analytical and statistical methods. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Data variables type NA The physical state of matter (solid, liquid, gas, or plasma) in which a substance exists. Phase information is critical for understanding chemical properties and behavior. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Phase NA Electrical conductivity of water corrected to a reference temperature, usually 25 degrees Celsius, so that samples measured at different temperatures can be compared; a common proxy for the concentration of dissolved ions. specific conductivity Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Specific conductance": Specific conductance Specific conductance NA The concentration of dissolved salts in a solution, typically expressed in parts per thousand or practical salinity units. Salinity affects osmotic potential and ion distribution. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) ODM2 variable name concept "Salinity": Salinity Salinity NA The electrical resistance of a material per unit length and cross-sectional area, quantifying opposition to electron flow. Resistivity characterizes material electrical properties. electrical resistivity Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) ODM2 variable name concept "Resistivity, electrical": The electrical resistance of an object is a measure of its opposition to the flow of electric current. The inverse quantity is electrical conductance, and is the ease with which an electric current passes. Resistivity NA The degree to which a substance contains the maximum possible amount of a solute or is filled with a liquid or gas. Saturation indicates equilibrium between phases. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Saturation NA The pressure contributed by a single gas component in a mixture of gases. Partial pressures determine gas solubility and diffusion. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Partial pressure NA The lowest surface or position, used as context for depth measurements or vertical location indicators. Bottom designation specifies reference points for vertical distance measurements. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Use as context for locations, e.g., the bottom end of a depth measurement. Bottom NA The electric charge magnitude on an ion or chemical species, typically expressed in elementary charges or Coulombs. Charge affects chemical reactivity and ion interactions. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Charge NA The force per unit area exerted by water columns, measured in pascals or bars. Water pressure increases with depth and affects aquatic processes. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Water pressure NA The maximum wind speed during a brief, sudden increase in wind velocity. Gust speed measurements characterize wind variability. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Gust speed NA The amount of precipitation falling as rain, typically measured in millimeters or inches. Rainfall data characterizes precipitation patterns and water input to ecosystems. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Rainfall NA The direction from which wind originates, typically expressed as compass bearing (0-360 degrees) or cardinal direction. Wind direction affects pollutant transport and ecosystem exposure. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Wind direction NA The ratio of actual water vapor pressure to saturation vapor pressure expressed as a percentage. Relative humidity affects evaporation, condensation, and organism hydration. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Relative humidity NA A boolean property indicating whether something is accessible, present, or available for use. Availability designation indicates resource accessibility. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Availability NA A subdivision of the United States, including the 50 states and territories. US state classification provides geopolitical and regulatory context. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) US state NA The east-west coordinate in projected coordinate systems, measured in distance units from a reference meridian. Easting coordinates require associated coordinate system designation. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025). JMC manually edited on 3/23/26 Easting, in State Plane coordinates. Add a State Plane Zone for context. Easting NA The north-south coordinate in projected coordinate systems, measured in distance units from a reference meridian. Northing coordinates require associated coordinate system designation. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025). JMC manually edited on 3/23/26 Northing, in State Plane coordinates. Add a State Plane Zone for context. Northing NA A coordinate reference system that uses a map projection to represent locations on a curved surface as planar coordinates, enabling positions to be expressed as easting and northing values in linear units. A projected coordinate system includes a base geographic coordinate system, projection method, datum, linear unit, and projection parameters; examples include UTM Zone 13N and State Plane zones. Definition revised to generalize the previous State plane zone term to projected coordinate systems that can qualify easting and northing values. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025). JMC manually edited label and definition on 3/23/26 Projected Coordinate System NA The location or spatial coordinates of an object or observation point in two or three-dimensional space. Position specifies spatial arrangement. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Position NA The distance across a circular or spherical object measured through its center. Diameter quantifies size of round structures. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) ODM2 variable name concept "Diameter": A diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle. It can also be defined as the longest chord of the circle. Both definitions are also valid for the diameter of a sphere. In more modern usage, the length of a diameter is also called the diameter. In this sense one speaks of the diameter rather than a diameter (which refers to the line itself), because all diameters of a circle or sphere have the same length, this being twice the radius r. Diameter NA The distance across the interior of a hollow circular or cylindrical object measured through its center. Inner diameter specifies internal dimension. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Inner diameter NA The distance across the exterior of a circular or cylindrical object measured through its center. Outer diameter specifies external dimension. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Outer diameter NA The sum of atomic weights of atoms in a molecule, expressed in atomic mass units (amu) or grams per mole (g/mol). Molecular weight is fundamental for stoichiometric calculations. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Molecular weight NA The standardized designation of file format type (e.g., text/plain, application/pdf) used for data classification and application routing. MIME types enable appropriate file handling by software. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) MIME type NA The ratio of standard deviation to the mean, expressed as a percentage, measuring relative variability. Coefficient of variation enables comparison of variability across datasets with different means. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Coefficient of variation NA The force exerted on an object due to gravity, measured in newtons, grams, or pounds. Weight quantifies mass in a gravitational field. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Weight NA A position or value greater than a reference point or threshold. Above designation indicates values or locations higher than specified reference. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Above NA A position or value less than a reference point or threshold. Below designation indicates values or locations lower than specified reference. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Below NA The interval of uncertainty around a measurement or estimate, typically expressed as absolute or relative error bounds. Error ranges quantify measurement reliability. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Error range NA The chemical name of a molecule as listed in the PubChem chemistry database. PubChem names enable standardized chemical identification. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Give the name of a molecule in PubChem (use list instead if possible). PubChem molecule name NA The symbolic representation of a molecule using chemical element symbols and atom counts. Molecular formulas specify molecular composition. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Describe a molecule using its molecular formula (use list instead if possible). Molecular formula NA A standardized hash-based identifier of molecular structure derived from the IUPAC International Chemical Identifier. InChIKeys enable unique compound identification. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Describe a molecule using its InChIKey (use list instead if possible). InChIKey NA The ionization technique used in mass spectrometry such as electrospray ionization (ESI) or atmospheric pressure chemical ionization (APCI). Ionization mode affects ion formation and fragmentation patterns. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Ionization mode NA A qualitative assessment of ease of use, effectiveness, and user satisfaction with a tool, interface, or resource. Usability evaluation ensures practical utility. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Usability NA The signal strength or abundance of a specific ion measured in mass spectrometry. Ion intensity indicates relative compound abundance. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Ion intensity NA A sequence identifier or label used for sample tracking and identification in high-throughput studies. Barcodes enable association of sequence data with metadata. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Barcode NA A defined segment of a genome with specific boundaries and functional or structural characteristics. Genomic regions enable localization of genes and regulatory elements. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Genomic region NA The upper part of a fraction indicating the number of equal parts being counted. Numerators combine with denominators to express proportions. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Numerator NA The lower part of a fraction indicating the total number of equal parts in the whole. Denominators define the total for proportional representation. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Denominator NA The proportion of different isotopes of an element in a sample, measured by mass spectrometry. Isotope ratios track elemental sources and transformation processes. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Isotope ratio NA Stratigraphic layer or formation characterized by specific geological age, composition, or fossil content. Geologic zones provide temporal and spatial context. geologic unit Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) ODM2 variable name concept "Geologic unit": Geologic units consists primarily of identifying physiographic units and determining the rock lithology or coarse stratigraphy of exposed units. Geologic zone NA A variant of an element with a different number of neutrons and thus different atomic mass. Isotopes have distinct nuclear properties affecting traceability. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Isotope NA A laboratory plate with multiple wells (typically 96 or 384) used for high-throughput assays and cultivation. Microplates enable parallel processing of samples. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Microplate NA An individual depression or chamber in a microplate used to contain a sample or reaction mixture. Wells serve as reaction vessels in high-throughput assays. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Microplate well NA A region or layer of water or sediment that receives no sunlight, characteristic of deep ocean or lake environments below the photic zone. Aphotic environments support chemosynthetic and heterotrophic microbial communities. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Aphotic NA A discrete phase in the developmental progression of an organism from birth or germination through maturation and senescence. Growth stage classification enables temporal comparison of developmental processes. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Growth stage NA A culture medium containing only essential nutrients and a carbon source with no additional amino acids, vitamins, or growth factors. Minimal media are used for selective cultivation and genetic selection. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Minimal media NA A unique identifier assigned by the Chemical Abstracts Service to identify chemical substances. CAS numbers enable unambiguous chemical identification across databases. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) CAS registry number NA The percentage of nucleotide or amino acid positions that are identical between two aligned sequences. Sequence identity quantifies overall similarity between sequences. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Sequence identity NA A measure of overall resemblance between sequences considering both identical and chemically similar positions. Sequence similarity is more permissive than identity for protein sequences. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Sequence similarity NA A measure of genetic difference between sequences reflecting evolutionary distance and time since divergence from a common ancestor. Divergence quantifies molecular evolution rates. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Relative evolutionary divergence NA A formal record of research findings distributed through peer-reviewed journals, books, or repositories. Publications document scientific discoveries and methodologies. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Publication NA An organized collection of related data stored and accessible through query systems. Databases enable structured storage and retrieval of biological information. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Database NA A designation indicating that a term, identifier, or data entry is no longer current or recommended for use. Obsolete entries are retained for historical tracking. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Obsolescence status NA The spatial configuration of flagella on a bacterial cell such as monotrichous, lophotrichous, amphitrichous, or peritrichous. Flagellar arrangement is a morphological characteristic used for bacterial identification. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Flagellar arrangement NA The geometric form of a microbial cell such as coccus, bacillus, vibrio, or spiral. Cell shape is a fundamental morphological characteristic. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Cell shape NA A designation indicating that a property or phenomenon has been directly detected or measured. Observed designation distinguishes empirical data from predictions. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Observed NA The percentage of expected genomic content present in a sequenced genome assembly. Completeness assessment indicates assembly quality. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Genome completeness NA The proportion of non-target genetic material present in a genome assembly. Contamination assessment identifies assembly artifacts. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Genome contamination NA The contig length corresponding to the 50th percentile of summed contig lengths in an assembly. N50 is a measure of assembly contiguity. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Genome N50 NA The average number of sequencing reads mapping to each position in a reference sequence. Read coverage indicates sequencing depth and data quality. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Read coverage NA A numerical position identifier locating elements within a sequence, array, or database. Indices enable efficient data retrieval. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Index NA A known substance added to samples at a fixed concentration for quantitation by comparison of relative signal intensity. Internal standards correct for experimental variation. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Internal standard NA The precise molecular weight of a chemical compound calculated from exact atomic masses. Exact mass enables compound identification via mass spectrometry. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Exact mass NA A plant organism that has been genetically modified by introduction of exogenous DNA. Transformants enable functional genetic studies. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Plant transformant NA An engineered DNA sequence containing desired genetic elements for introduction into cells or organisms. Constructs enable targeted genetic modifications. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) DNA construct NA A measure of evolutionary distance between sequences accounting for multiple substitutions at the same site. Jukes-Cantor correction improves divergence estimates. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Jukes-Cantor distance NA A group of cells with similar structure and function forming a distinct component of an organism. Tissues are organizational units in multicellular organisms. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) ODM2 medium concept "Tissue": Sample of a living organism's tissue or sensor emplaced to measure property of tissue. Tissue NA The genetic composition of an organism, typically designated by allele designations. Genotype determines potential phenotypic expression. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Genotype NA A designation indicating that a sample was obtained from a field or natural environment. Collection metadata indicates source and provenance. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Collected NA The classification of soil based on particle size distribution (sand, silt, clay), organic content, and other properties. Soil type affects water retention and nutrient availability. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Soil type NA A distinct structural unit of a plant such as root, stem, leaf, or flower composed of multiple tissue types. Organs are functional units in plants. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Plant organ NA The amount of biomass produced per unit of substrate consumed during microbial growth. Growth yield indicates metabolic efficiency. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Growth yield NA The fraction of pore space within a solid matrix such as soil or sediment. Porosity affects water flow and gas diffusion. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) ODM2 variable name concept "Porosity": Porosity or void fraction is a measure of the void (i.e. "empty") spaces in a material, and is a fraction of the volume of voids over the total volume, between 0 and 1, or as a percentage between 0 and 100%. Porosity NA The amount of thermal energy produced during a chemical or biological process. Heat release indicates reaction energetics. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Heat release NA A designation indicating that a property, substance, or organism is not detected or present. Absence designation distinguishes negative results. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Absence NA The amount of precipitation falling per unit time, typically measured in millimeters per hour or inches per day. Precipitation rate characterizes rainfall intensity. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Precipitation rate NA The temperature at which air becomes saturated and water vapor begins to condense into liquid water. Dew point indicates atmospheric moisture content. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) obsolete Dew point true NA The emission of light by a substance after absorption of electromagnetic radiation at shorter wavelengths. Fluorescence enables optical detection in analytical techniques. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Fluorescence NA A parameter quantifying the amount of a substance that can dissolve in a solvent at specified conditions. Coefficients enable solubility prediction. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Solubility coefficient NA The pressure exerted by a vapor in equilibrium with its liquid or solid phase at a given temperature. Vapor pressure indicates volatility. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) ODM2 variable name concept "Vapor pressure": The pressure of a vapor in equilibrium with its non-vapor phases Vapor pressure NA The relative intensity of a detected compound peak in liquid chromatography-mass spectrometry normalized to another peak. Peak ratios quantify relative abundances. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) LC-MS peak area ratio NA A calibration or reference sample with known low concentration or signal used to assess assay performance at low levels. Low controls verify sensitivity. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Low control NA A calibration or reference sample with known high concentration or signal used to assess assay performance at high levels. High controls verify specificity. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) High control NA A growth condition with reduced but non-zero dissolved oxygen concentration suitable for facultative anaerobes. Microaerobic conditions enable selective cultivation. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Microaerobic NA A container used for microbial cultivation such as flask, plate, bioreactor, or fermentation tank. Vessels determine culture volume and aeration. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Culture vessel NA Carbon source used for microbial growth. COMO Dec 15 2025 Carbon source NA The geographic or spatial coordinates of the location where an environmental sample was collected. Location information enables spatial analysis. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Environmental sample location NA The fraction or amount of light a material blocks or absorbs, quantifying its ability to attenuate light. This value is often obtained experimentally through spectroscopy to measure changes in microbial growth in solution. OD Definition source - Manual (JHC, Dec 16 2025) Optical density NA Relative amounts of multiple categories of the same object. abundance Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) ODM2 variable name concept "Abundance": The relative representation of a species in a particular ecosystem. If this generic term is used, the publisher should specify/qualify the species, class, etc. being measured in the method, qualifier, or other appropriate field. Relative abundance NA Component Weight. COMO Dec 15 2025 Component weight NA The force per unit area exerted by a gas or liquid on container walls or interfaces. Pressure affects solubility and reaction rates. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Pressure NA A defined geographic or spatial area with distinct characteristics. Region designation provides geographic context. COMO Dec 15 2025 Region NA Distance. Add context indicating reference points, e.g., From and To. COMO Dec 15 2025 Distance. Add context indicating reference points, e.g., From and To. ODM2 variable name concept "Distance": Distance measured from a sensor to a target object such as the surface of a water body or snow surface. Distance NA Use as context for locations, e.g., the top end of a depth measurement. COMO Dec 15 2025 Use as context for locations, e.g., the top end of a depth measurement. Top NA Use as context, for example, to label inorganic or organic carbon. COMO Dec 15 2025 Use as context, for example, to label inorganic or organic carbon. Organic NA Absolute amount of a substance, such as an element. See also: concentration. Absolute amount of a substance, such as an element. See also: concentration. COMO Dec 15 2025 Amount NA The kinetic parameter quantifying the rate of enzyme-catalyzed reactions at specified substrate concentrations. Rate constants enable reaction rate prediction. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Catalytic rate constant NA A parameter describing the relative affinity of an exchange site for different ions, particularly for cation exchange in soils. Coefficients quantify ion selectivity. Definition source - Claude 4.5 Sonnet through Claude Code in VSCode (Dec 16 2025) Gapon selectivity coefficient NA A sequence of characters used to identify or refer to a specific element, such as a variable or a set of data. Definition source - Manual (JHC, Dec 16 2025) Identifier NA Sequence property NA The process of managing the use and development of land resources. Definition source - Manual (JHC, Sep 25 2025) Land management NA The action or process of flowing into and/or out of a substance or environment. Definition source - Manual (JHC, Dec 22 2025) Flux NA The instantaneous or present-time value of a quantity, representing the state at the current computational time step or measurement instance. This temporal qualifier distinguishes real-time measurements from historical or predicted values in dynamic environmental models. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Current NA The value of a quantity from the preceding time step or measurement period, used for tracking temporal changes and calculating rates of change. This temporal qualifier enables analysis of how variables evolve over time in dynamic environmental simulations. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Previous NA The accumulated or aggregated value of a quantity over a defined time period, representing the running total from a starting point to the present. This temporal qualifier is essential for quantifying total inputs, outputs, or transformations in ecosystem budgets and biogeochemical cycles. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Cumulative NA A mathematical transformation where values are expressed on a logarithmic scale, often used to compress large ranges of values or represent multiplicative relationships. This qualifier indicates that the variable has been log-transformed for analysis or presentation. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Logarithmic NA Relating to water movement, distribution, and properties in environmental systems including precipitation, runoff, infiltration, and groundwater flow. This qualifier indicates that a variable pertains specifically to water cycle processes and hydrological phenomena. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Hydrological NA A qualifier indicating that the quantity represents a negative value or direction, often used to distinguish loss or removal processes from gain or addition processes. This directional qualifier is important for understanding bidirectional fluxes and net balances in biogeochemical systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Negative NA The release or discharge of substances, energy, or radiation from a source into the environment. This attribute quantifies outputs from biological, chemical, or physical processes including greenhouse gas emissions, pollutant releases, and radiation outputs in environmental systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Emission NA The metabolic process by which organisms convert organic compounds into energy while releasing carbon dioxide. This attribute measures the rate or amount of respiratory activity in plants, animals, and microorganisms, representing a fundamental component of ecosystem carbon cycling. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Respiration NA The opposition to flow, movement, or change in a system, including electrical resistance, hydraulic resistance, or ecological resistance to disturbance. This attribute quantifies how strongly a system impedes processes or maintains stability against perturbations. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Resistance NA The decrease or removal of mass, energy, or substances from a system through various pathways including leaching, volatilization, runoff, or consumption. This attribute quantifies outputs and depletions in ecosystem mass balance and biogeochemical cycling. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Loss NA The biological breakdown of organic compounds into inorganic forms, converting organic nitrogen to ammonium, organic phosphorus to phosphate, and organic carbon to carbon dioxide. This attribute measures the rate of nutrient transformation from organic to plant-available inorganic forms in soils and aquatic systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Mineralization NA The capacity of a material to absorb radiation, heat, or substances, expressed as the fraction of incident energy or material absorbed. This attribute quantifies absorption efficiency in processes including solar radiation interception by vegetation and nutrient uptake by organisms. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Absorptivity NA The maximum amount or extent that a system can hold, process, or produce, including water holding capacity, nutrient retention capacity, or productive capacity. This attribute quantifies the limits and potentials of environmental and biological systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Capacity NA The addition of materials to soil or water to improve properties, fertility, or quality, including fertilizers, lime, compost, or other soil conditioners. This attribute quantifies the application or incorporation of amendments in managed ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Amendment NA The rate at which energy is converted to organic matter through photosynthesis by primary producers, representing the fundamental energy input to ecosystems. This attribute measures the gross or net production of biomass by autotrophic organisms. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Primary productivity NA The transfer of dead plant material including leaves, branches, flowers, and fruits from living vegetation to the soil surface. This attribute quantifies the rate of organic matter and nutrient return from vegetation to soil through senescence and shedding. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Litterfall NA The generation or creation of biomass, offspring, or products by organisms or ecosystems, including net primary production, secondary production, and reproductive output. This attribute measures the rate of biological production processes. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Production NA The passage or transfer of energy, radiation, or substances through a medium, including light transmission through canopies or water transmission through soils. This attribute quantifies the fraction or rate of transmitted quantities through materials or systems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Transmission NA The rate of water movement or transfer through a system, including evapotranspiration flux, infiltration flux, or lateral water flow. This attribute quantifies water transport processes fundamental to hydrological cycling and ecosystem water balance. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Water flux NA The accumulation of dead plant material on the soil surface forming a distinct organic horizon that mediates decomposition and nutrient cycling. This layer provides habitat for decomposer organisms, regulates soil microclimate, and controls the release of nutrients from organic matter in forest and grassland ecosystems. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Jan 8 2026) Litter layer NA The electromagnetic in-phase response is the component of a secondary electromagnetic field that is perfectly aligned (0° phase shift) with the primary, transmitting field. Definition source - JMC manually edited 3/23/26 Electromagnetic in-phase response NA The temperature at which air becomes saturated with water vapor and dew begins to form. Dew point Definition source - Manual (JHC, Jan 9 2026) Dewpoint NA The process of being infected by a pathogen or forming a symbiotic relationship (e.g., nodule infection). Definition source - Manual (JHC, Jan 9 2026) Infection NA Application or measurement outside of fertilizer bands in soil. Definition source - Manual (JHC, Jan 9 2026) Non-band NA The application of water below the soil surface through buried distribution systems such as drip lines or emitters, delivering water directly to the root zone. Definition source - Manual (JHC, Jan 9 2026); merged with the definition of BERVO:8000258 (Sep 4 2026) Subsurface irrigation NA A process carried out by living organisms or biological systems that transforms matter, energy, or information over time. This concept provides a general parent for process-oriented BERVO terms such as respiration, mineralization, production, and other organism- or ecosystem-driven activities. Definition source - Manual (Codex, Mar 26 2026) Biological process NA The horizontal direction of a line, view, or vector measured clockwise from a reference direction, typically geographic north. Azimuth describes orientation or bearing within a horizontal plane and is commonly reported in degrees. bearing compass azimuth Definition source - Manual (JMC, May 4 2026) Azimuth NA The angular extent of the cone or region over which an instrument accepts incoming radiation or observes a scene. Field of view angle describes aperture width rather than the direction the instrument is aimed and is commonly reported in degrees. FOV field of view Definition source - Manual (JMC, May 4 2026) Field of view angle NA A dimensionless correction factor applied during optical canopy or leaf area index processing to adjust gap fraction or transmittance estimates for radiation scattered into the sensor field of view. This factor represents a data-processing correction rather than the physical scattering process itself. Definition source - Manual (JMC, May 4 2026) Scattering correction factor NA A dimensionless index describing the apparent non-random spatial aggregation of foliage inferred from canopy optical measurements, commonly calculated as the ratio of effective leaf area index to clumping-corrected or true leaf area index. Values below 1 indicate more clumped foliage relative to a random distribution. ACF apparent clumping index LAI_CLUMP AmeriFlux BADM variable name: LAI_CLUMP. Definition source - Manual (JMC, May 4 2026) Apparent clumping factor NA A controlled categorical code assigned to an observation or dataset to indicate a quality-control condition, processing decision, or measurement anomaly relevant to interpretation. QC flag quality flag AmeriFlux variable-name qualifier: _QC. Definition source - Manual (JMC, May 11 2026) Quality control flag NA The process of fixing carbon dioxide in C4 plants. Definition source - Manual (JHC, Jan 9 2026) C4 carbon fixation NA Relating to substances or systems in the gas phase, in which molecules are not held in a condensed state and disperse to occupy the available volume. This concept describes the physical state in which a chemical species diffuses, is transported, or exchanges across soil, water, and atmosphere boundaries in terrestrial systems. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Gaseous NA The liberation of a substance from a bound, sorbed, or encapsulated state into a surrounding medium, making it available for transport, transformation, or uptake. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Release NA The chemical or enzymatic cleavage of a compound by reaction with water, breaking larger molecules into smaller constituents. In soil systems this is the principal route by which polymeric organic matter becomes available for microbial uptake. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Hydrolysis NA The suppression or slowing of a chemical or biological process by a substance that interferes with the enzyme or reaction pathway responsible for it. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Inhibition NA The liberation of ammonium ions from fertilizer particles, mineral surfaces, or organic matter into soil solution, where they become available for plant uptake, nitrification, or adsorption. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Ammonium release NA The liberation of ammonia from fertilizer particles, soil solution, or decomposing organic matter, commonly preceding volatilization to the atmosphere or oxidation by nitrifying organisms. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Ammonia release NA The liberation of urea from fertilizer particles into soil solution, preceding its hydrolysis to ammonia by soil urease. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Urea release NA The liberation of nitrate ions from fertilizer particles or mineral surfaces into soil solution, where they become available for plant uptake, denitrification, or leaching. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Nitrate release NA The liberation of dihydrogen phosphate ions from fertilizer particles into soil solution, where they become subject to sorption, precipitation, or plant uptake. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Dihydrogen phosphate release NA The enzymatic cleavage of particulate soil organic matter into dissolved organic compounds, representing the first step in decomposition of the solid organic pool. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Solid soil organic matter hydrolysis NA The enzymatic cleavage of microbial cell residues and metabolic byproducts in soil, returning necromass carbon and nutrients to the dissolved organic pool. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Microbial residual hydrolysis NA The enzymatic cleavage of organic matter adsorbed onto soil mineral surfaces, releasing it from physical protection into the dissolved organic pool. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Sorbed organic matter hydrolysis NA The suppression of microbial oxidation of ammonia to nitrite and nitrate, typically by compounds applied alongside fertilizer to limit nitrogen loss through leaching and denitrification. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Nitrification inhibition NA The suppression of urease-mediated breakdown of urea to ammonia, typically by compounds applied alongside fertilizer to slow nitrogen release and reduce volatilization. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Urea hydrolysis inhibition NA A substance in the gas phase below its critical temperature, able to coexist with its condensed form. In environmental models this most often refers to water vapor in soil pores and the atmosphere. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Vapor NA The stalk attaching a leaf blade to the stem, conducting water and photosynthate between them and positioning the blade for light interception. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Petiole NA The -COOH functional group, whose dissociation to -COO- governs the pH-dependent surface charge of organic matter and mineral surfaces in soil. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Carboxyl NA A chemical tracer that readily partitions into the gas phase, used to follow transport and loss pathways involving volatilization. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Volatile tracer NA A chemical tracer representing a plant-essential nutrient, used to follow nutrient transport, transformation, and loss through soil and water pathways. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Nutrient tracer NA The organic fraction of soil, comprising plant and microbial residues at all stages of decomposition together with stabilized humified compounds. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) ODM2 variable name concept "Soil organic matter (SOM)": Soil organic matter (SOM) is the organic matter component of soil, consisting of plant and animal residues at various stages of decomposition, cells and tissues of soil organisms, and substances synthesized by soil organisms. Soil organic matter NA A chemical species followed through a system in order to quantify transport, transformation, or loss pathways, whether introduced deliberately or tracked as a natural constituent. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Tracer NA A substance of definite composition, whether element, compound, or ion. Collects the substances whose transport, transformation, and exchange are tracked in environmental and earth-system models, and serves as the filler class for involves_chemicals restrictions. Definition source - Claude Opus 5 through Claude Code (Aug 28 2026) Chemical NA Portion of the chemical material of a system, distinguished by chemical form, physical state, or location, and tracked as a stock in models or quantified as a fraction of a sample, such as dissolved inorganic carbon, dissolved organic nitrogen, or non-structural carbohydrate. chemical fraction Definition source - Claude Fable 5.1 through Claude Code (Sep 3 2026) Chemical pool NA Projected area of the stems and branches of vegetation per unit horizontal ground area, the stem counterpart of leaf area index. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Stem area index NA Ability of a material to conduct heat, expressed as the heat flux through it per unit temperature gradient. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ATS alignment for issue #36 Thermal conductivity NA Chemical compound whose molecules contain carbon bonded to hydrogen, other than the simple carbon oxides, carbonates, cyanides, and carbides that are treated as inorganic. organic molecular entity Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 Organic compound NA Hydrocarbon composed of two or more fused aromatic rings, formed largely by incomplete combustion of organic matter and persistent in soils, sediments, and water. PAH polycyclic arene Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 Polycyclic aromatic hydrocarbon NA Saturated acyclic hydrocarbon of formula CnH2n+2, in which every carbon-carbon bond is single. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 Alkane NA Organic compound in which at least one hydrogen atom is replaced by a halogen atom. halogenated organic compound Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 Organohalogen compound NA Ester of phthalic acid, a class of compounds used as plasticisers and encountered as environmental contaminants. Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 Phthalate ester NA Chemical element with symbol Ag and atomic number 47. Ag Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Ag": Expressed as silver Silver NA Chemical element with symbol As and atomic number 33. As Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "As": Expressed as arsenic Arsenic NA Chemical element with symbol B and atomic number 5. B Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "B": Expressed as boron Boron NA Chemical element with symbol Ba and atomic number 56. Ba Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Ba": Expressed as barium Barium NA Chemical element with symbol Be and atomic number 4. Be Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Be": Expressed as beryllium Beryllium NA Chemical element with symbol Br and atomic number 35. Br Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Br": Expressed as bromine Bromine NA Chemical element with symbol Cd and atomic number 48. Cd Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Cd": Expressed as cadmium Cadmium NA Chemical element with symbol Cl and atomic number 17. Cl Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Cl": Expressed as chlorine Distinct from Chloride, the anion in which chlorine is usually measured in water. Chlorine NA Chemical element with symbol Co and atomic number 27. Co Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Co": Expressed as cobalt Cobalt NA Chemical element with symbol Cr and atomic number 24. Cr Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Cr": Expressed as chromium Chromium NA Chemical element with symbol Cu and atomic number 29. Cu Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Cu": Expressed as copper Copper NA Chemical element with symbol F and atomic number 9. F Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "F": Expressed as fluorine Fluorine NA Chemical element with symbol Hg and atomic number 80. Hg Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Hg": Expressed as mercury Mercury NA Chemical element with symbol Mn and atomic number 25. Mn Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Mn": Expressed as manganese Manganese NA Chemical element with symbol Mo and atomic number 42. Mo Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Mo": Expressed as molybdenum Molybdenum NA Chemical element with symbol Ni and atomic number 28. Ni Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Ni": Expressed as nickel Nickel NA Chemical element with symbol Pb and atomic number 82. Pb Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Pb": Expressed as lead Lead NA Chemical element with symbol Ra and atomic number 88. Ra Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Ra": Expressed as Radium. Also known as "radium equivalent." The radium equivalent concept allows a single index or number to describe the gamma output from different mixtures of uranium (i.e., radium), thorium, and 40K in a material. Radium NA Chemical element with symbol Re and atomic number 75. Re Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Re": Expressed as rhenium Rhenium NA Chemical element with symbol S and atomic number 16. S Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "S": Expressed as Sulfur Sulfur NA Chemical element with symbol Sb and atomic number 51. Sb Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Sb": Expressed as antimony Antimony NA Chemical element with symbol Se and atomic number 34. Se Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Se": Expressed as selenium Selenium NA Chemical element with symbol Si and atomic number 14. Si Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Si": Expressed as silicon Silicon NA Chemical element with symbol Sn and atomic number 50. Sn Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Sn": Expressed as tin Tin NA Chemical element with symbol Sr and atomic number 38. Sr Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Sr": Expressed as strontium Strontium NA Chemical element with symbol Th and atomic number 90. Th Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Th": Expressed as thorium Thorium NA Chemical element with symbol Ti and atomic number 22. Ti Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Ti": Expressed as titanium Titanium NA Chemical element with symbol Tl and atomic number 81. Tl Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Tl": Expressed as thallium Thallium NA Chemical element with symbol U and atomic number 92. U Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "U": Expressed as uranium Uranium NA Chemical element with symbol V and atomic number 23. V Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "V": Expressed as vanadium Vanadium NA Chemical element with symbol Zn and atomic number 30. Zn Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Zn": Expressed as zinc Zinc NA Chemical element with symbol Zr and atomic number 40. Zr Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "Zr": Expressed as zirconium Zirconium NA Nitrogen oxoanion NO2-, the conjugate base of nitrous acid and an intermediate between ammonium and nitrate in nitrification and denitrification. NO2- Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "NO2": Expressed as nitrite Nitrite NA Anion CN-, the conjugate base of hydrogen cyanide. CN- Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "CN-": Expressed as cyanide Cyanide NA Organometallic cation CH3Hg+, the principal bioaccumulating form of mercury in aquatic food webs. CH3Hg+ methylmercury(1+) Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "CH3Hg": Expressed at methylmercury Methylmercury NA Oxide of silicon, SiO2, the reporting basis for dissolved silica and silicate in natural waters. SiO2 silica Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "SiO2": Expressed as silicate Silicon dioxide NA Stable isotope of hydrogen with one proton and one neutron, 2H, whose abundance relative to protium is reported as delta 2H. 2H hydrogen-2 delta 2H Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "delta 2H": Expressed as deuterium Deuterium NA Stable isotope of nitrogen with seven protons and eight neutrons, 15N, whose abundance relative to nitrogen-14 is reported as delta 15N. 15N delta 15N Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "delta N15": Expressed as nitrogen-15 Nitrogen-15 NA Stable isotope of oxygen with eight protons and ten neutrons, 18O, whose abundance relative to oxygen-16 is reported as delta 18O. 18O delta 18O Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "delta O18": Expressed as oxygen-18 Oxygen-18 NA Capacity of a water sample to neutralise acid, summed over all its titratable bases and commonly reported as an equivalent concentration of calcium carbonate. alkalinity Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "TA": Expressed as total alkalinity Total alkalinity NA Aromatic hydrocarbon of two fused benzene rings, C10H8, the simplest and most volatile polycyclic aromatic hydrocarbon. C10H8 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C10H8": Expressed as naphthalene Naphthalene NA Naphthalene bearing one methyl substituent, C11H10, either the 1- or the 2- isomer. C10H7CH3 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C10H7CH3": Expressed as methylnaphthalene Methylnaphthalene NA Naphthalene bearing two methyl substituents, C12H12, any of its positional isomers. C10H6(CH3)2 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C10H6(CH3)2": Expressed as dimethylnaphthalene Dimethylnaphthalene NA Naphthalene bearing three methyl substituents, C13H14, any of its positional isomers. C10H5(CH3)3 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C10H5(CH3)3": Expressed as trimethylnaphthalene Trimethylnaphthalene NA Naphthalene bearing four methyl substituents, C14H16, any of its positional isomers. C10H4(CH3)4 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C10H4(CH3)4": Expressed as tetramethylnaphthalene Tetramethylnaphthalene NA Naphthalene bearing one ethyl substituent, C12H12, either the 1- or the 2- isomer. C10H7C2H5 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C10H7C2H5": Expressed as ethylnaphthalene Ethylnaphthalene NA Polycyclic aromatic hydrocarbon of a naphthalene unit bridged by an ethylene group, C12H8. C12H8 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C12H8": Expressed as acenaphthylene Acenaphthylene NA Aromatic hydrocarbons of molecular formula C12H10, such as acenaphthene and biphenyl, reported as a group where the analysis does not resolve the isomers. C12H10 acenaphthene biphenyl Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C12H10": Expressed as C12H10, e.g., acenaphthene, biphenyl C12H10 aromatic hydrocarbons NA Polycyclic aromatic hydrocarbon of two benzene rings joined by a five-membered ring, C13H10. C13H10 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C13H10": Expressed as fluorene Fluorene NA Fluorene bearing one methyl substituent, C14H12, any of its positional isomers. C14H12 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C14H12": Expressed as methylfluorene Methylfluorene NA Polycyclic aromatic hydrocarbon of three angularly fused benzene rings, C14H10. C14H10 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C14H10": Expressed as phenanthrene Phenanthrene NA Aromatic hydrocarbons of molecular formula C15H12, such as methylphenanthrene and methylanthracene, reported as a group where the analysis does not resolve the isomers. C15H12 methylanthracene methylphenanthrene Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C15H12": Expressed as C15H12, e.g., methylphenanthrene, Methylanthracene C15H12 aromatic hydrocarbons NA Aromatic hydrocarbons of molecular formula C16H10, such as fluoranthene and pyrene, reported as a group where the analysis does not resolve the isomers. C16H10 fluoranthene pyrene Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C16H10": Expressed as C16H10, e.g., fluoranthene, pyrene C16H10 aromatic hydrocarbons NA Phenanthrene bearing two methyl substituents, C16H14, any of its positional isomers. C16H14 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C16H14": Expressed as dimethylphenanthrene Dimethylphenanthrene NA Aromatic hydrocarbons of molecular formula C17H12, such as benzo[a]fluorene, methylfluoranthene, and methylpyrene, reported as a group where the analysis does not resolve the isomers. C17H12 benzo[a]fluorene methylfluoranthene methylpyrene Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C17H12": Expressed as C17H12, e.g., benzo(a)fluorene, methylfluoranthene, methylpyrene C17H12 aromatic hydrocarbons NA Aromatic hydrocarbons of molecular formula C18H12, such as benz[a]anthracene, chrysene, and triphenylene, reported as a group where the analysis does not resolve the isomers. C18H12 benz[a]anthracene chrysene triphenylene Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C18H12": Expressed as C18H12, e.g., benz(a)anthracene, chrysene, triphenylene C18H12 aromatic hydrocarbons NA Alkylated phenanthrene, 1-methyl-7-isopropylphenanthrene, C18H18, formed from resin diterpenoids and used as a marker of conifer wood combustion. C18H18 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C18H18": Expressed as retene Retene NA Chrysene bearing one methyl substituent, C19H14, any of its positional isomers. C19H14 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C19H14": Expressed as methylchrysene Methylchrysene NA Aromatic hydrocarbons of molecular formula C20H12, such as benzo[b]fluoranthene, benzo[e]pyrene, and perylene, reported as a group where the analysis does not resolve the isomers. C20H12 benzo[b]fluoranthene benzo[e]pyrene perylene Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C20H12": Expressed as C20H12, e.g., benzo(b)fluoranthene, benzo(e)pyrene, perylene C20H12 aromatic hydrocarbons NA Polycyclic aromatic hydrocarbon of five fused benzene rings, C22H14. C22H14 dibenzo[a,h]anthracene Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C22H14": Expressed as Dibenz(a,h)anthracene Dibenz[a,h]anthracene NA Heterocyclic aromatic compound of two benzene rings fused to a central furan ring, C12H8O. C12H8O Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C12H8O": Expressed as dibenzofuran Dibenzofuran NA Heterocyclic aromatic compound of two benzene rings fused to a central thiophene ring, C12H8S. C12H8S Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C12H8S": Expressed as dibenzothiophene Dibenzothiophene NA Dibenzothiophene bearing one methyl substituent, C13H10S, any of its positional isomers. C13H10S Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C13H10S": Expressed as methyldibenzothiophene Methyldibenzothiophene NA Heterocyclic aromatic compound of two benzene rings fused to a central pyrrole ring, C12H9N. 9H-carbazole C12H9N Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C12H9N": Expressed as carbazole Carbazole NA Aromatic hydrocarbon of a single six-membered ring, C6H6. C6H6 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C6H6": Expressed as benzene Benzene NA Benzene bearing one methyl substituent, C7H8. C7H8 methylbenzene Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C7H8": Expressed as Toluene Toluene NA Benzene bearing one ethyl substituent, C8H10. C8H10 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C8H10": Expressed as ethylbenzene Ethylbenzene NA Benzene bearing two methyl substituents, C8H10, in any of the ortho, meta, or para positions; the three isomers are commonly reported together as xylenes. C6H4(CH3)2 dimethylbenzene xylenes Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C6H4(CH3)2": Expressed as xylenes Xylene NA Benzene bearing one vinyl substituent, C8H8, the monomer of polystyrene. C8H8 vinylbenzene Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C8H8": Expressed as styrene Styrene NA Benzene bearing one hydroxyl substituent, C6H5OH. C6H5OH Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C6H5OH": Expressed as phenol Phenol NA Benzene bearing one amino substituent, C6H5NH2. C6H5NH2 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C6H5NH2": Expressed as aniline Aniline NA Benzene bearing one nitro substituent, C6H5NO2. C6H5NO2 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C6H5NO2": Expressed as nitrobenzene Nitrobenzene NA Phenol bearing two nitro substituents, C6H4N2O5, any of its positional isomers. C6H4N2O5 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C6H4N2O5": Expressed as dinitrophenol Dinitrophenol NA Toluene bearing two nitro substituents, C7H6N2O4, any of its positional isomers. C7H6N2O4 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C7H6N2O4": Expressed as dinitrotoluene Dinitrotoluene NA Cyclic alpha,beta-unsaturated ketone, 3,5,5-trimethylcyclohex-2-en-1-one, C9H14O, used as an industrial solvent. C9H14O Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C9H14O": Expressed as isophorone Isophorone NA Simplest ketone, propan-2-one, C3H6O. C3H6O propan-2-one Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C3H6O": Expressed as acetone Acetone NA Ketone butan-2-one, C4H8O, also known as methyl ethyl ketone. C4H8O MEK methyl ethyl ketone Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C4H8O": Expressed as butanone Butanone NA Simplest diol, ethane-1,2-diol, C2H6O2. C2H6O2 ethane-1,2-diol Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C2H6O2": Expressed as Ethylene glycol Ethylene glycol NA Diethyl ester of phthalic acid, C12H14O4. C12H14O4 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C12H14O4": Expressed as diethyl phthalate Diethyl phthalate NA Mixed benzyl and butyl ester of phthalic acid, C19H20O4. C19H20O4 butyl benzyl phthalate Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C19H20O4": Expressed as benzyl butyl pththalate Benzyl butyl phthalate NA Dimethyl ester of terephthalic acid, C10H10O4, an isomer of dimethyl phthalate with the ester groups in the para positions. C10H10O4 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C10H10O4": Expressed as dimethyl terephthalate Dimethyl terephthalate NA Alkane of two carbon atoms, C2H6. C2H6 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C2H6": Expressed as ethane Ethane NA Straight-chain alkane of fifteen carbon atoms, C15H32. C15 n-alkane C15H32 n-pentadecane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C15H32": Expressed as C15 n-alkane Pentadecane NA Straight-chain alkane of sixteen carbon atoms, C16H34. C16 n-alkane C16H34 n-hexadecane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C16H34": Expressed as C16 n-alkane Hexadecane NA Straight-chain alkane of seventeen carbon atoms, C17H36. C17 n-alkane C17H36 n-heptadecane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C17H36": Expressed as C17 n-alkane Heptadecane NA Straight-chain alkane of eighteen carbon atoms, C18H38. C18 n-alkane C18H38 n-octadecane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C18H38": Expressed as C18 n-alkane Octadecane NA Straight-chain alkane of nineteen carbon atoms, C19H40. C19 n-alkane C19H40 n-nonadecane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C19H40": Expressed as C19 n-alkane Nonadecane NA Straight-chain alkane of twenty carbon atoms, C20H42. C20 n-alkane C20H42 eicosane n-icosane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C20H42": Expressed as C20 n-alkane Icosane NA Straight-chain alkane of twenty-one carbon atoms, C21H44. C21 n-alkane C21H44 heneicosane n-henicosane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C21H44": Expressed as C21 n-alkane Henicosane NA Straight-chain alkane of twenty-two carbon atoms, C22H46. C22 n-alkane C22H46 n-docosane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C22H46": Expressed as C22 n-alkane Docosane NA Straight-chain alkane of twenty-three carbon atoms, C23H48. C23 n-alkane C23H48 n-tricosane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C23H48": Expressed as C23 n-alkane Tricosane NA Straight-chain alkane of twenty-four carbon atoms, C24H50. C24 n-alkane C24H50 n-tetracosane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C24H50": Expressed as C24 n-alkane Tetracosane NA Straight-chain alkane of twenty-five carbon atoms, C25H52. C25 n-alkane C25H52 n-pentacosane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C25H52": Expressed as C25 n-alkane Pentacosane NA Straight-chain alkane of twenty-six carbon atoms, C26H54. C26 n-alkane C26H54 n-hexacosane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C26H54": Expressed as C26 n-alkane Hexacosane NA Straight-chain alkane of twenty-seven carbon atoms, C27H56. C27 n-alkane C27H56 n-heptacosane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C27H56": Expressed as C27 n-alkane Heptacosane NA Straight-chain alkane of twenty-eight carbon atoms, C28H58. C28 n-alkane C28H58 n-octacosane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C28H58": Expressed as C28 n-alkane Octacosane NA Straight-chain alkane of twenty-nine carbon atoms, C29H60. C29 n-alkane C29H60 n-nonacosane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C29H60": Expressed as C29 n-alkane Nonacosane NA Straight-chain alkane of thirty-one carbon atoms, C31H64. C31 n-alkane C31H64 n-hentriacontane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C31H64": Expressed as C31 n-alkane Hentriacontane NA Methane bearing one chlorine atom, CH3Cl. CH3Cl methyl chloride Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "CH3Cl": Expressed as chloromethane Chloromethane NA Methane bearing two chlorine atoms, CH2Cl2. CH2Cl2 methylene chloride Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "CH2Cl2": Expressed as dichloromethane Dichloromethane NA Methane bearing three chlorine atoms, CHCl3. CHCl3 trichloromethane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "CHCl3": Expressed as chloroform Chloroform NA Methane bearing one bromine atom, CH3Br. CH3Br methyl bromide Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "CH3Br": Expressed as bromomethane Bromomethane NA Methane bearing three bromine atoms, CHBr3. CHBr3 tribromomethane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "CHBr3": Expressed as bromoform Bromoform NA Methane bearing one bromine and two chlorine atoms, CHBrCl2, a trihalomethane formed during water chlorination. CHBrCl2 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "CHBrCl2": Expressed as bromodichloromethane Bromodichloromethane NA Methane bearing two bromine atoms and one chlorine atom, CHBr2Cl, a trihalomethane formed during water chlorination. CHBr2Cl chlorodibromomethane Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "CHBr2Cl": Expressed as dibromochloromethane Dibromochloromethane NA Ethane bearing one chlorine atom, C2H5Cl. C2H5Cl ethyl chloride Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C2H5Cl": Expressed as chloroethane Chloroethane NA Ethane bearing two chlorine atoms, C2H4Cl2, either the 1,1- or the 1,2- isomer. C2H4Cl2 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C2H4Cl2": Expressed as dichloroethane Dichloroethane NA Ethane bearing three chlorine atoms, C2H3Cl3, either the 1,1,1- or the 1,1,2- isomer. C2H3Cl3 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C2H3Cl3": Expressed as trichloroethane Trichloroethane NA Ethane bearing four chlorine atoms, C2H2Cl4, either the 1,1,1,2- or the 1,1,2,2- isomer. C2H2Cl4 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C2H2Cl4": Expressed as tetrachloroethane Tetrachloroethane NA Ethane in which all six hydrogen atoms are replaced by chlorine, C2Cl6. C2Cl6 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C2Cl6": Expressed as hexachloroethane Hexachloroethane NA Ethene bearing one chlorine atom, C2H3Cl, the monomer of polyvinyl chloride. C2H3Cl vinyl chloride Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C2H3Cl": Expressed as vinyl chloride Chloroethene NA Ethene bearing three chlorine atoms, C2HCl3, a chlorinated solvent and common groundwater contaminant. C2HCl3 TCE trichloroethylene Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C2HCl3": Expressed as trichloroethylene Trichloroethene NA Ethene in which all four hydrogen atoms are replaced by chlorine, C2Cl4, a chlorinated solvent and common groundwater contaminant. C2Cl4 PCE perchloroethylene tetrachloroethylene Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C2Cl4": Expressed as tetrachloroethylene Tetrachloroethene NA Buta-1,3-diene in which all six hydrogen atoms are replaced by chlorine, C4Cl6. C4Cl6 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C4Cl6": Expressed as hexchlorobutadiene Hexachlorobutadiene NA Cyclopenta-1,3-diene in which all six hydrogen atoms are replaced by chlorine, C5Cl6. C5Cl6 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C5Cl6": Expressed as hexachlorocyclopentadiene Hexachlorocyclopentadiene NA Ether of two 2-chloroethyl groups, C4H8Cl2O. C4H8Cl2O bis(chloroethyl) ether Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C4H8Cl2O": Expressed as bis(chloroethyl) ether Bis(2-chloroethyl) ether NA Benzene bearing one chlorine atom, C6H5Cl. C6H5Cl Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C6H5Cl": Expressed as chlorobenzene Chlorobenzene NA Benzene bearing two chlorine atoms, C6H4Cl2, any of the ortho, meta, or para isomers. C6H4Cl2 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C6H4Cl2": Expressed as dichlorobenzene Dichlorobenzene NA Benzene bearing three chlorine atoms, C6H3Cl3, any of its positional isomers. C6H3Cl3 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C6H3Cl3": Expressed as trichlorobenzene Trichlorobenzene NA Benzene in which all six hydrogen atoms are replaced by chlorine, C6Cl6, a persistent organochlorine fungicide. C6Cl6 Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C6Cl6": Expressed as hexachlorobenzene Hexachlorobenzene NA Phenol bearing five chlorine atoms, C6HCl5O, a persistent organochlorine biocide and wood preservative. C6HCl5O Definition source - Claude Opus 5 through Claude Code (Sep 17 2026), ODM2 speciation alignment for issue #66 ODM2 speciation concept "C6HCl5O": Expressed as pentachlorophenol Pentachlorophenol NA Plant cover of an area taken as a whole, without regard to the taxa that compose it. vegetation cover Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), ODM2 medium alignment for issue #66 ODM2 medium concept "Vegetation": The plants of an area considered in general or as communities, but not taxonomically. Vegetation NA Individual living entity, unicellular or multicellular, considered as a whole rather than as tissue, population, or community. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), ODM2 medium alignment for issue #66 ODM2 medium concept "Organism": Data collected about a species at organism level. Organism NA Area of the environment, with its physical and biotic conditions, in which a particular population or species lives. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), ODM2 medium alignment for issue #66 ODM2 medium concept "Habitat": A habitat is an ecological or environmental area that is inhabited by a particular species of animal, plant, or other type of organism. Habitat NA Naturally occurring solid aggregate of one or more minerals or mineraloids. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), ODM2 medium alignment for issue #66 ODM2 medium concept "Rock": Specimen collected from a naturally occuring solid aggregate of one or more minerals. Rock NA Naturally occurring inorganic solid of definite chemical composition and ordered crystal structure. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), ODM2 medium alignment for issue #66 ODM2 medium concept "Mineral": Specimen collected as a mineral. Mineral NA Entire unconsolidated or secondarily recemented cover of weathered and transported material that overlies coherent bedrock, from fractured basement rock and saprolite through soil, sediment, and organic accumulations. Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), ODM2 medium alignment for issue #66 ODM2 medium concept "Regolith": The entire unconsolidated or secondarily recemented cover that overlies more coherent bedrock, that has been formed by weathering, erosion, transport and/or deposition of the older material. The regolith thus includes fractured and weathered basement rocks, saprolites, soils, organic accumulations, volcanic material, glacial deposits, colluvium, alluvium, evaporitic sediments, aeolian deposits and ground water. Everything from fresh rock to fresh air. Regolith NA Solid or liquid particles suspended in a fluid such as water or air, collected or measured as the particulate fraction of the mixture. particulate particulates suspended particulate matter Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), ODM2 medium alignment for issue #66 ODM2 medium concept "Particulate": Specimen collected from particulates suspended in a paticulate-fluid mixture. Examples include particulates in water or air. Particulate matter NA Liquid composed of organic compounds rather than water, such as a hydrocarbon or solvent phase. liquid organic Definition source - Claude Opus 5 through Claude Code (Sep 18 2026), ODM2 medium alignment for issue #66 ODM2 medium concept "Liquid organic": Specimen collected as an organic liquid. Organic liquid NA Accumulation of water on or in the land surface, standing or flowing, from an ocean or lake down to a stream, canal, or pool. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 Water body NA Feature of the solid surface of the Earth with a recognisable shape and origin, such as a cave, a shore, or a sinkhole. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 Landform NA Structure or engineered feature assembled by deliberate human effort, such as a canal, a sewer, or a treatment plant. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 Human construction NA Human construction designed and operated for a specific purpose, at which environmental measurements are shaped by current or past human activity. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Facility": A non-ambient location where environmental measurements are expected to be strongly influenced by current or previous activities of humans. *Sites identified with a "facility" primary site type must be further classified with one of the applicable secondary site types. Facility NA Facility in which one or more generators convert mechanical or thermal energy into electrical energy. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 Power plant NA Conduit, usually underground or covered, constructed to convey storm drainage, wastewater, or both to a treatment plant, water body, or disposal site. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66; broadened by Claude Opus 5.5 through Claude Code (Oct 7 2026) for issue #143 ODM2 defines a sewer as underground. The definition was broadened to admit Open sewer (BERVO:8000958), for issue #143. Sewer NA Body of running water moving under gravity in a defined channel, whether the channel is natural or altered by engineering. brook creek river Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Stream": A body of running water moving under gravity flow in a defined channel. The channel may be entirely natural, or altered by engineering practices through straightening, dredging, and (or) lining. An entirely artificial channel should be qualified with the "canal" or "ditch" secondary site type. Stream NA Reach of a stream in which the flow is influenced by the tide while the water chemistry remains that of the stream. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Tidal stream": A stream reach where the flow is influenced by the tide, but where the water chemistry is not normally influenced. A site where ocean water typically mixes with stream water should be coded as an estuary. Tidal stream NA Land saturated or inundated by surface water or groundwater often enough and long enough that saturation governs soil development and supports vegetation adapted to saturated soil, including swamps, marshes, and bogs. bog marsh swamp Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Wetland": Land where saturation with water is the dominant factor determining the nature of soil development and the types of plant and animal communities living in the soil and on its surface (Cowardin, December 1979). Wetlands are found from the tundra to the tropics and on every continent except Antarctica. Wetlands are areas that are inundated or saturated by surface or groundwater at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs and similar areas. Wetlands may be forested or unforested, and naturally or artificially created. Wetland NA Semi-enclosed coastal inlet, typically a river mouth, in which tidal seawater mixes with stream water and salinity lies between that of fresh water and the open ocean. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Estuary": A coastal inlet of the sea or ocean; esp. the mouth of a river, where tide water normally mixes with stream water (modified, Webster). Salinity in estuaries typically ranges from 1 to 25 Practical Salinity Units (psu), as compared oceanic values around 35-psu. See also: tidal stream and coastal. Estuary NA Open marine water body, including the seas and gulfs, that makes up the bulk of the Earth's hydrosphere. gulf sea Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Ocean": Site in the open ocean, gulf, or sea. (See also: Coastal, Estuary, and Tidal stream). Ocean NA Marine water offshore of the tidal mixing zone of an estuary yet close enough to the shore, typically within three nautical miles, that the coast shapes its conditions. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Coastal": An oceanic site that is located off-shore beyond the tidal mixing zone (estuary) but close enough to the shore that the investigator considers the presence of the coast to be important. Coastal sites typically are within three nautical miles of the shore. Coastal water NA Artificial watercourse, larger than a ditch, built to connect bodies of water for navigation, drainage, or irrigation. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Canal": An artificial watercourse designed for navigation, drainage, or irrigation by connecting two or more bodies of water; it is larger than a ditch. Canal NA Excavation dug into the ground, lined or unlined, to convey water for drainage or irrigation, smaller than a canal. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Ditch": An excavation artificially dug in the ground, either lined or unlined, for conveying water for drainage or irrigation; it is smaller than a canal. Ditch NA Point at which the water table meets the land surface and groundwater flows out naturally, whether perennially, intermittently, or ephemerally. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Spring": A location at which the water table intersects the land surface, resulting in a natural flow of groundwater to the surface. Springs may be perennial, intermittent, or ephemeral. Spring NA Body of land ice formed from recrystallised accumulated snow that moves downslope under its own weight over years or centuries. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Glacier": Body of land ice that consists of recrystallized snow accumulated on the surface of the ground and moves slowly downslope (WSP-1541A) over a period of years or centuries. Since glacial sites move, the lat-long precision for these sites is usually coarse. Glacier NA Natural underground open space within a rock formation large enough to admit a person, commonly formed by dissolution of soluble rock. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Cave": A natural open space within a rock formation large enough to accommodate a human. A cave may have an opening to the outside, is always underground, and sometimes submerged. Caves commonly occur by the dissolution of soluble rocks, generally limestone, but may also be created within the voids of large-rock aggregations, in openings along seismic faults, and in lava formations. Cave NA Part of a rock formation exposed at the surface of the surrounding land. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Outcrop": The part of a rock formation that appears at the surface of the surrounding land. Outcrop NA Depression or hole in the land surface formed when the roof of a cavern collapses or when soil and bedrock are removed by water, usually in limestone terrain. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Sinkhole": A crater formed when the roof of a cavern collapses; usually found in limestone areas. Surface water and precipitation that enters a sinkhole usually evaporates or infiltrates into the ground, rather than draining into a stream. Sinkhole NA Flat, dry, vegetation-free floor of a closed desert basin, built of thin evenly stratified sheets of clay, silt, or sand, where water collects and evaporates leaving soluble salts. alkaline flat dry lake bed Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Playa": A dried-up, vegetation-free, flat-floored area composed of thin, evenly stratified sheets of fine clay, silt or sand, and represents the bottom part of a shallow, completely closed or undrained desert lake basin in which water accumulates and is quickly evaporated, usually leaving deposits of soluble salts. Playa NA Land along the edge of a sea, lake, or wide river, including any beach or bank between the high and low water marks. shoreline Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Shore": The land along the edge of the sea, a lake, or a wide river where the investigator considers the proximity of the water body to be important. Land adjacent to a reservoir, lake, impoundment, or oceanic site type is considered part of the shore when it includes a beach or bank between the high and low water marks. Shore NA Opening in the Earth's crust through which volcanic gases and steam escape to the atmosphere. fumarole Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Volcanic vent": Vent from which volcanic gases escape to the atmosphere. Also known as fumarole. Volcanic vent NA Part of the subsurface above a zone of saturation, usually the main water table, in which pores hold both air and water. vadose zone Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Unsaturated zone": A site equipped to measure conditions in the subsurface deeper than a soil hole, but above the water table or other zone of saturation. Unsaturated zone NA Artificial non-pressurised reservoir, above, at, or below ground level, filled by gravity flow and used to store water from precipitation, surface water, or groundwater. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Cistern": An artificial, non-pressurized reservoir filled by gravity flow and used for water storage. The reservoir may be located above, at, or below ground level. The water may be supplied from diversion of precipitation, surface, or groundwater sources. Cistern NA Sewer that conveys both storm drainage and waste products to a treatment plant, water body, or disposal site. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Combined sewer": An underground conduit created to convey storm drainage and waste products into a wastewater-treatment plant, stream, reservoir, or disposal site. Combined sewer NA Sewer that conveys storm drainage alone into a stream channel or reservoir. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Storm sewer": An underground conduit created to convey storm drainage into a stream channel or reservoir. If the sewer also conveys liquid waste products, then the "combined sewer" secondary site type should be used. Storm sewer NA Sewer that conveys liquid and semisolid domestic, commercial, or industrial waste to a treatment plant, water body, or disposal site. sanitary sewer Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Wastewater sewer": An underground conduit created to convey liquid and semisolid domestic, commercial, or industrial waste into a treatment plant, stream, reservoir, or disposal site. If the sewer also conveys storm water, then the "combined sewer" secondary site type should be used. Wastewater sewer NA Subsurface sewage disposal system consisting of a septic tank in which solids settle, a distribution system, and a leaching system that disperses the effluent into the ground. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Septic system": A site within or in close proximity to a subsurface sewage disposal system that generally consists of: (1) a septic tank where settling of solid material occurs, (2) a distribution system that transfers fluid from the tank to (3) a leaching system that disperses the effluent into the ground. Septic system NA Networked infrastructure that carries treated or untreated water to multiple domestic, industrial, institutional, or commercial users. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Water-distribution system": A site located somewhere on a networked infrastructure that distributes treated or untreated water to multiple domestic, industrial, institutional, and (or) commercial users. May be owned by a municipality or community, a water district, or a private concern. Water distribution system NA Underground pipe or tunnel through which groundwater is diverted to surface water to lower the water table or reduce erosion, open to the atmosphere at its lowest point. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Groundwater drain": An underground pipe or tunnel through which groundwater is artificially diverted to surface water for the purpose of reducing erosion or lowering the water table. A drain is typically open to the atmosphere at the lowest elevation, in contrast to a well which is open at the highest point. Groundwater drain NA Constructed subsurface open space large enough to admit a person, not substantially open to the atmosphere and not a well, dug for minerals, transportation, or another purpose. mine shaft tunnel Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Tunnel, shaft, or mine": A constructed subsurface open space large enough to accommodate a human that is not substantially open to the atmosphere and is not a well. The excavation may have been for minerals, transportation, or other purposes. See also: Excavation. Underground excavation NA Small excavation into the top few metres of soil made to sample or measure soil composition and properties. soil hole Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Soil hole": A small excavation into soil at the top few meters of earth surface. Soil generally includes some organic matter derived from plants. Soil holes are created to measure soil composition and properties. Sometimes electronic probes are inserted into soil holes to measure physical properties, and (or) the extracted soil is analyzed. Soil pit NA Point at which water is withdrawn or diverted from a surface water body, such as the head of a canal or a pumped intake on a reservoir. diversion Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Diversion": A site where water is withdrawn or diverted from a surface-water body (e.g. the point where the upstream end of a canal intersects a stream, or point where water is withdrawn from a reservoir). Includes sites where water is pumped for use elsewhere. Water diversion NA Point at which water or wastewater is returned to a surface water body, typically the discharge end of an effluent pipe. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Outfall": A site where water or wastewater is returned to a surface-water body, e.g. the point where wastewater is returned to a stream. Typically, the discharge end of an effluent pipe. Outfall NA Land surface covered by a relatively impermeable constructed material such as concrete or asphalt, typically as part of transportation infrastructure. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Pavement": A surface site where the land surface is covered by a relatively impermeable material, such as concrete or asphalt. Pavement sites are typically part of transportation infrastructure, such as roadways, parking lots, or runways. Pavement NA Earthen pit or pond used to store or biologically treat manure and washwater from livestock operations. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Animal waste lagoon": A facility for storage and/or biological treatment of wastes from livestock operations. Animal-waste lagoons are earthen structures ranging from pits to large ponds, and contain manure which has been diluted with building washwater, rainfall, and surface runoff. In treatment lagoons, the waste becomes partially liquefied and stabilized by bacterial action before the waste is disposed of on the land and the water is discharged or re-used. Animal waste lagoon NA Grounds laid out for the game of golf, typically irrigated and treated as a place of water use. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Golf course": A place-of-use, either public or private, where the game of golf is played. A golf course typically uses water for irrigation purposes. Should not be used if the site is a specific hydrologic feature or facility; but can be used especially for the water-use sites. Golf course NA Residential building for a single family or a small number of families. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "House": A residential building for a single or small number of families. House NA Power plant that generates electricity from the potential energy of falling water turning turbine generators. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Hydroelectric plant": A facility that generates electric power by converting potential energy of water into kinetic energy. Typically, turbine generators are turned by falling water. Hydroelectric plant NA Power plant that uses water to generate electricity from heat, typically by driving turbine generators with steam raised by combustion, nuclear reaction, or geothermal energy. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Thermoelectric plant": A facility that uses water in the generation of electricity from heat. Typically turbine generators are driven by steam. The heat may be caused by various means, including combustion, nuclear reactions, and geothermal processes. Thermoelectric plant NA Facility in which environmental samples are prepared or analysed and quality-control samples such as equipment blanks are collected. sample preparation area Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Laboratory or sample-preparation area": A site where some types of quality-control samples are collected, and where equipment and supplies for environmental sampling are prepared. Equipment blank samples are commonly collected at this site type, as are samples of locally produced deionized water. This site type is typically used when the data are either not associated with a unique environmental data-collection site, or where blank water supplies are designated by Center offices with unique station IDs. Laboratory NA Site on the land surface, typically dry, where solid waste is or was aggregated and sometimes covered with a veneer of soil. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Landfill": A typically dry location on the surface of the land where primarily solid waste products are currently, or previously have been, aggregated and sometimes covered with a veneer of soil. See also: Wastewater disposal and waste-injection well. Landfill NA Facility in which wastewater is treated to reduce dissolved or suspended materials before discharge or reuse. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Wastewater-treatment plant": A facility where wastewater is treated to reduce concentrations of dissolved and (or) suspended materials prior to discharge or reuse. Wastewater treatment plant NA Facility in which water is treated before use for consumption or another purpose. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Water-supply treatment plant": A facility where water is treated prior to use for consumption or other purpose. Water supply treatment plant NA Water-using facility tied to a specific geographic point, such as a factory, mill, farm, or store, that fits no more specific facility type. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Water-use establishment": A place-of-use (a water using facility that is associated with a specific geographical point location, such as a business or industrial user) that cannot be specified with any other facility secondary type. Water-use place-of-use sites are establishments such as a factory, mill, store, warehouse, farm, ranch, or bank. See also: Aggregate water-use-establishment. Water-use establishment NA Site at which wastewater is disposed of by application to the land surface. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), ODM2 site type alignment for issue #66 ODM2 site type concept "Wastewater land application": A site where the disposal of waste water on land occurs. Use "waste-injection well" for underground waste-disposal sites. Wastewater land application site NA Quantity of a substance that an organism, population, or process would take up in a time step if supply did not limit it, as distinct from the uptake realized. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms In EcoSIM the demand for a nutrient or gas is computed before supply constrains it; uptake is the constrained result. Demand NA Set of microbes grouped by the metabolic role they play in a model or an ecosystem, such as nitrifiers or methanogens, without regard to taxonomy. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Microbial functional group NA Microbes that obtain carbon and energy from organic compounds, driving decomposition and heterotrophic respiration. heterotrophs Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Heterotrophic microbes NA Microbes that fix inorganic carbon and obtain energy from light or from oxidizing inorganic compounds, such as nitrifiers. autotrophs Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Autotrophic microbes NA Heterotrophic microbes that respire with oxygen as the terminal electron acceptor. aerobic bacteria Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms The EcoSIM parameters that name this group call it aerobic bacteria. Aerobic heterotrophs NA Heterotrophic microbes that obtain energy by fermenting organic substrates to products such as acetate and hydrogen in the absence of oxygen. fermentative microbes Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms In EcoSIM fermentation is an anaerobic mode of the heterotrophic carbon pool rather than a separate state variable. The term exists for the parameters that name fermenters and does not assert a separate pool. Fermenters NA Microbes that reduce nitrate through nitrite and nitrogen oxides to dinitrogen when oxygen is scarce. denitrifying microbes Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Denitrifiers NA Microbes that oxidize ammonia to nitrite and nitrite to nitrate, gaining energy from the oxidation. ammonia oxidizers nitrifying microbes Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Nitrifiers NA Anaerobic archaea that produce methane from acetate, from hydrogen and carbon dioxide, or from other simple substrates. methanogenic archaea Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms In EcoSIM the acetotrophic and hydrogenotrophic kinds are two pathways of one methanogen pool rather than separate state variables. The two child terms exist for the parameters that name them and do not assert separate pools. Methanogens are archaea. BERVO has no Archaea term, so the group sits here as a metabolic role; if Archaea is added (NCBITaxon:2157) it is a second parent. Methanogens NA Methanogens that produce methane by splitting acetate. acetoclastic methanogens Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Acetotrophic methanogens NA Methanogens that produce methane by reducing carbon dioxide with hydrogen. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Hydrogenotrophic methanogens NA Microbes that oxidize methane as their source of carbon and energy. methane oxidizers Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Methanotrophs NA Microbes that fix dinitrogen from the air into ammonia, whether free-living or in symbiosis with plants. nitrogen fixers nitrogen-fixing bacteria Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Diazotrophs NA Eukaryotic microbes with chitinous cell walls that feed by absorption, including the saprotrophs of litter and soil and the mycorrhizal symbionts of roots. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Fungi NA Fungi that live in symbiosis with plant roots, trading water and mineral nutrients for plant carbon. mycorrhiza mycorrhizae Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Mycorrhizal fungi NA Class of plants grouped by shared traits, growth form, and function in a model or an ecosystem, such as C3 grass or deciduous broadleaf tree, without regard to taxonomy. PFT Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms EcoSIM resolves many variables per plant functional type; their names carry the suffix _pft. Plant functional type NA Process by which a substance changes chemical form or state, whether by reaction, sorption, precipitation, dissolution, or biological conversion, tracked as the net change of a pool. transformation Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Chemical transformation NA Interval of model time over which state variables are advanced once by the model's equations. timestep Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Time step NA One pass of a repeated numerical procedure, such as an energy balance solved by successive approximation, within a single time step. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Iteration NA Potential energy of water per unit volume relative to pure free water at the same temperature, which governs the direction of water movement in soil and plant. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms ODM2 variable name concept "Water potential": Water potential is the potential energy of water relative to pure free water (e.g. deionized water) in reference conditions. It quantifies the tendency of water to move from one area to another due to osmosis, gravity, mechanical pressure, or matrix effects including surface tension. Water potential NA Component of the water potential of a plant cell due to the hydrostatic pressure of its contents against the cell wall. turgor pressure pressure potential Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Turgor potential NA Component of water potential due to dissolved solutes, always zero or negative. solute potential Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Osmotic potential NA Heat taken up or released when water changes phase, by evaporation, condensation, freezing, thawing, or sublimation, without a change of temperature. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Latent heat NA Heat that changes the temperature of a body or medium when it is transferred, as opposed to latent heat. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Sensible heat NA Heat carried by the bulk movement of a fluid, such as water or air moving through soil pores or over a canopy. advective heat Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Convective heat NA Water content of a soil after excess water has drained away by gravity and downward movement has largely ceased. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Field capacity NA Water content of a soil at or below which a plant wilts and does not recover turgor when the air around it is saturated. permanent wilting point Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Wilting point NA Group of organisms of one kind living in a defined area, whether a plant population in a stand or a microbial population in a soil layer. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Population NA Main axes of growth of a plant organ, such as the main root axes from which secondary roots branch. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Primary axes NA Water held below the land surface in the saturated zone of soil and rock, beneath the water table. Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Groundwater NA Organic matter present in solution, the fraction of organic material that passes a fine filter, comprising dissolved organic carbon, nitrogen, and phosphorus. DOM Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Dissolved organic matter NA Organic matter present as solid particles rather than in solution, such as fragments of litter and roots in soil or suspended particles in water. POM Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Particulate organic matter NA Carbon held in particulate organic matter. POC Definition source - Claude Opus 5 through Claude Code (Sep 21 2026), concept gap review of the variable terms Particulate organic carbon NA Heat carried through a medium by molecular contact, without bulk movement of the medium itself. Definition source - Claude Opus 5 through Claude Code (Sep 22 2026), review of #90 Conductive heat NA Heat carried as electromagnetic radiation, which needs no intervening medium. Definition source - Claude Opus 5 through Claude Code (Sep 22 2026), review of #90 Radiative heat NA Component of water potential due to the capillary and adsorptive forces binding water to a solid matrix, always zero or negative. Definition source - Claude Opus 5 through Claude Code (Sep 22 2026), water potential slice of #83 Soil capillary pressure (BERVO:0001872) is a separate quantity and is not annotated with this term. It is the gas-liquid pressure difference at air-water interfaces in soil pores; this potential covers the adsorptive forces binding water to particle surfaces as well. Matric potential NA Component of water potential due to the elevation of water in a gravitational field, relative to a reference height. Definition source - Claude Opus 5 through Claude Code (Sep 22 2026), water potential slice of #83 Gravitational potential NA Pressure measured relative to a perfect vacuum, including the pressure of the overlying atmosphere. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Pressure, absolute": Pressure Absolute pressure NA Pressure measured relative to the local atmospheric pressure, equal to absolute pressure minus atmospheric pressure. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Pressure, gauge": Pressure relative to the local atmospheric or ambient pressure Gauge pressure NA Pressure that must be applied to a solution to stop the net inflow of pure solvent across a semipermeable membrane, equal in magnitude and opposite in sign to the osmotic potential. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Osmotic pressure": Osmotic pressure Osmotic pressure NA Mass of a particulate or porous material divided by the total volume it occupies, including the pore space between particles. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Bulk density": The mass of many particles of the material divided by the total volume they occupy. The total volume includes particle volume, inter-particle void volume and internal pore volume. Bulk density NA Length of the closed boundary of a circle or of a cross-section, such as the girth of a tree stem. girth Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Circumference": In geometry, the circumference (from Latin circumferens, meaning "carrying around") of a circle is the (linear) distance around it. That is, the circumference would be the length of the circle if it were opened up and straightened out to a line segment. Since a circle is the edge (boundary) of a disk, circumference is a special case of perimeter. The perimeter is the length around any closed figure and is the term used for most figures excepting the circle and some circular-like figures such as ellipses. Informally, "circumference" may also refer to the edge itself rather than to the length of the edge. Circumference NA Degree to which the outline of a particle or object approaches a circle, reflecting the sharpness of its corners and edges. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Roundness": Roundness is the measure of how closely the shape of an object approaches that of a mathematically perfect circle. Roundness applies in two dimensions, such as the cross sectional circles along a cylindrical object such as a shaft or a cylindrical roller for a bearing. In geometric dimensioning and tolerancing, control of a cylinder can also include its fidelity to the longitudinal axis, yielding cylindricity. The analogue of roundness in three dimensions (that is, for spheres) is sphericity. Roundness NA Ease with which a fluid, usually water, moves through the pores or fractures of a porous medium under a hydraulic gradient. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Hydraulic conductivity": Hydraulic conductivity, symbolically represented as K, is a property of vascular plants, soils and rocks, that describes the ease with which a fluid (usually water) can move through pore spaces or fractures. It depends on the intrinsic permeability of the material, the degree of saturation, and on the density and viscosity of the fluid. Hydraulic conductivity NA Distance travelled per unit time by a sound wave propagating through a medium. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Speed of sound": Speed of sound in the medium sampled Speed of sound NA Rate of flow of visible light energy, weighted by the sensitivity of the human eye to each wavelength. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Luminous Flux": A measure of the total amount of visible light present Luminous flux NA Strength of the radar echo returned by targets such as precipitation particles, commonly expressed on a logarithmic scale in dBZ. reflectivity Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Reflectivity": dBZ stands for decibel relative to Z. It is a logarithmic dimensionless technical unit used in radar, mostly in weather radar, to compare the equivalent reflectivity factor (Z) of a radar signal reflected off a remote object (in mm6 per m3) to the return of a droplet of rain with a diameter of 1 mm (1 mm6 per m3). It is proportional to the number of drops per unit volume and the sixth power of drops' diameter and is thus used to estimate the rain or snow intensity. Radar reflectivity NA Measure of how an electric field affects, and is affected by, a dielectric medium, relating the electric displacement in the medium to the applied field. absolute permittivity electrical permittivity Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Permittivity": Permittivity is a physical quantity that describes how an electric field affects, and is affected by a dielectric medium, and is determined by the ability of a material to polarize in response to the field, and thereby reduce the total electric field inside the material. Thus, permittivity relates to a material's ability to transmit (or "permit") an electric field. ODM2 variable name concept "Permittivity, electrical": In electromagnetism, absolute permittivity, often simply called permittivity, usually denoted by the Greek letter ε (epsilon), is the measure of capacitance that is encountered when forming an electric field in a particular medium. More specifically, permittivity describes the amount of charge needed to generate one unit of electric flux in a particular medium. Accordingly, a charge will yield more electric flux in a medium with low permittivity than in a medium with high permittivity. Permittivity is the measure of a material's ability to store an electric field in the polarization of the medium. Permittivity NA Permittivity of a material expressed as a ratio to the permittivity of a vacuum, which in soils varies strongly with water content. dielectric constant Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Dielectric constant": The relative permittivity of a material is its (absolute) permittivity expressed as a ratio relative to the permittivity of vacuum. Permittivity is a material property that affects the Coulomb force between two point charges in the material. Relative permittivity is the factor by which the electric field between the charges is decreased relative to vacuum. Likewise, relative permittivity is the ratio of the capacitance of a capacitor using that material as a dielectric, compared with a similar capacitor that has vacuum as its dielectric. Relative permittivity is also commonly known as dielectric constant, a term deprecated in engineering as well as in chemistry. Relative permittivity NA Real part of the complex relative permittivity, related to the energy a material stores under an oscillating electric field. real part of relative permittivity Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Real dielectric constant": Soil reponse of a reflected standing electromagnetic wave of a particular frequency which is related to the stored energy within the medium. This is the real portion of the complex dielectric constant. Real dielectric constant NA Imaginary part of the complex relative permittivity, related to the energy a material loses under an oscillating electric field through conduction and dielectric relaxation. imaginary part of relative permittivity Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Imaginary dielectric constant": Soil reponse of a reflected standing electromagnetic wave of a particular frequency which is related to the dissipation (or loss) of energy within the medium. This is the imaginary portion of the complex dielectric constant. Imaginary dielectric constant NA Rate of flow of electric charge past a point or through a surface. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Electric Current": A flow of electric charge Electric current NA Difference in electric potential between two points, the work per unit charge needed to move a charge between them. electric potential difference Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Voltage": Voltage or Electrical Potential Voltage NA Rate at which electric energy is transferred or converted by a circuit. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Electric Power": Electric Power Electric power NA Energy delivered or stored by the movement or position of electric charges, the time integral of electric power. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Electric Energy": Electric Energy Electric energy NA Difference between the temperatures of a body or medium at two times or under two conditions. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Temperature change": temperature change Temperature change NA Temperature of a sample or medium at the start of a procedure or process, before heating or other treatment. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Temperature, initial": initial temperature before heating Initial temperature NA Duration between a reference event and the time of observation. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Time, elapsed": Time elapsed since an event occurred Elapsed time NA Number of full rotations an object completes per unit time. frequency of rotation rotational speed Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Frequency of Rotation": Number of rotations within a time period Rotation frequency NA Quantity held constant within a model or empirical relation that sets its form, such as a coefficient of a stage-discharge rating curve. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Parameter": Parameter related to a hydrologic process. An example usage would be for a starge-discharge relation parameter. Parameter NA Value of the dependent variable of a function where the independent variable equals zero. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Intercept": The point at which one of the variables in a function equals 0. Intercept NA Change in the dependent variable per unit change in the independent variable of a linear relationship. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Slope": Ratio between two variables in a linear relationship. ODM2 slope is this statistical slope, not the gradient of land, which is Slope (BERVO:8000031). Regression slope NA Constant added to a measured or modelled value to shift it onto a common reference. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Offset": Constant to be added as an offset to a variable of interest. Offset NA Value of a variable above or below which an action is taken or a response changes. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Threshold": A level above or below which an action is performed. Threshold NA Group of aluminosilicate framework minerals of potassium, sodium, and calcium that together make up most of the Earth's crust. feldspars Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 Feldspar NA Feldspar rich in potassium and sodium, forming a solid solution between orthoclase and albite. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Alkali feldspar": The alkali feldspar group are those feldspar minerals rich in the alkali elements like potassium and sodium. The alkali feldspars include albite, anorthoclase, microcline, orthoclase and sanidine. Alkali feldspar NA Feldspar series forming a solid solution between the sodium endmember albite and the calcium endmember anorthite. plagioclase feldspar Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Plagioclase": Plagioclase is a series of tectosilicate (framework silicate) minerals within the feldspar group. Rather than referring to a particular mineral with a specific chemical composition, plagioclase is a continuous solid solution series, more properly known as the plagioclase feldspar series (from the Ancient Greek for "oblique fracture", in reference to its two cleavage angles) Plagioclase NA Sodium endmember of the plagioclase series, NaAlSi3O8. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Albite": Albite is a plagioclase feldspar mineral. It is the sodium endmember of the plagioclase solid solution series. As such it represents a plagioclase with less than 10% anorthite content. Albite NA Potassium feldspar, KAlSi3O8, a common rock-forming mineral of granite and other felsic rocks. orthoclase feldspar Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Orthoclase": Orthoclase, or orthoclase feldspar (endmember formula KAlSi3O8), is an important tectosilicate mineral which forms igneous rock. The name is from the Ancient Greek for "straight fracture," because its two cleavage planes are at right angles to each other. It is a type of potassium feldspar, also known as K-feldspar. The gem known as moonstone (see below) is largely composed of orthoclase. Orthoclase NA Group of double-chain silicate minerals forming prismatic or needle-like crystals, common in igneous and metamorphic rocks. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Amphibole": Amphibole is an important group of inosilicate minerals, forming prism or needlelike crystals, composed of double chain SiO 4 tetrahedra, linked at the vertices and generally containing ions of iron and/or magnesium in their structures. Amphibole NA Group of hydrated potassium calcium phyllosilicate minerals, usually found as secondary minerals in cavities of basalt. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Apophyllite": The name apophyllite refers to a specific group of phyllosilicates, a class of minerals. Originally, the group name referred to a specific mineral, but was redefined in 1978 to stand for a class of minerals of similar chemical makeup that comprise a solid solution series, and includes the members fluorapophyllite-(K), fluorapophyllite-(Na), hydroxyapophyllite-(K). Apophyllite NA Aluminum phosphate hydroxide mineral, Al2(PO4)(OH)3. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Augelite": Augelite is an aluminium phosphate mineral with formula: Al2(PO4)(OH)3. The shade varies from colorless to white, yellow or rose. Its crystal system is monoclinic Augelite NA Natural zeolite with a microporous framework of silica and alumina tetrahedra and a high cation exchange capacity. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Clinoptilolite": Clinoptilolite is a natural zeolite comprising a microporous arrangement of silica and alumina tetrahedra. It has the complex formula: (Na,K,Ca)2-3Al3(Al,Si)2Si13O36·12H2O. Clinoptilolite NA High-temperature polymorph of silica, SiO2. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Cristobalite": The mineral cristobalite is a high-temperature polymorph of silica, meaning that it has the same chemical formula as quartz, SiO2, but a distinct crystal structure. Cristobalite NA Aluminum hydroxide mineral, gamma-Al(OH)3, common in highly weathered tropical soils and in bauxite. hydrargillite Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Gibbsite": Gibbsite, Al(OH)3, is one of the mineral forms of aluminium hydroxide. It is often designated as γ-Al(OH)3 (but sometimes as α-Al(OH)3.). It is also sometimes called hydrargillite (or hydrargyllite). Gibbsite NA Iron oxyhydroxide mineral, alpha-FeO(OH), a common product of the weathering of iron-bearing minerals in soils. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Goethite": Goethite, FeO(OH), is an iron-bearing hydroxide mineral of the diaspore group. It is found in soil and other low-temperature environments. Goethite NA Hydrated aluminosilicate clay mineral of the kaolin group, Al2Si2O5(OH)4·2H2O, distinguished from kaolinite by its interlayer water and often forming hollow tubular particles. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Halloysite": Halloysite is an aluminosilicate clay mineral with the empirical formula Al2Si2O5(OH)4. Its main constituents are aluminium (20.90%), silicon (21.76%) and hydrogen (1.56%). Halloysite NA Hydrated calcium vanadium oxide mineral. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Melanovanadite": melanovanadite a mineral Ca2V10O25 that is a complex oxide of calcium and vanadium Melanovanadite NA Group of sheet silicate minerals with nearly perfect basal cleavage, including muscovite and biotite. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Mica": The mica group of sheet silicate minerals includes several closely related materials having nearly perfect basal cleavage. All are monoclinic, with a tendency towards pseudohexagonal crystals, and are similar in chemical composition. Mica NA Clay mineral of the kaolin group, Al2Si2O5(OH)4, polymorphous with kaolinite. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Nacrite": Nacrite Al2Si2O5(OH)4 is a clay mineral that is polymorphous (or polytypic) with kaolinite. It crystallizes in the monoclinic system. X-ray diffraction analysis is required for positive identification. Nacrite was first described in 1807 for an occurrence in Saxony, Germany. The name is from nacre in reference to the mother of pearl luster of nacrite masses. Nacrite NA Crystalline silica, SiO2, the most abundant mineral of continental crust and of sand. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Quartz": Quartz is a type of silicate mineral composed of silicon and oxygen atoms. Quartz NA Hydrous phyllosilicate clay mineral that expands when heated and has a high cation exchange capacity. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Vermiculite": Vermiculite is a hydrous phyllosilicate mineral. It undergoes significant expansion when heated. Exfoliation occurs when the mineral is heated sufficiently, and the effect is routinely produced in commercial furnaces. Vermiculite NA Protein that catalyzes a specific biochemical reaction. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 Enzyme NA Phosphatase with an acidic pH optimum that hydrolyzes phosphate monoesters, releasing inorganic phosphate from organic matter, EC 3.1.3.2. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Acid phosphatase": Phosphatase enzymes are used by soil microorganisms to access organically bound phosphate nutrients. An assay on the rates of activity of these enzymes may be used to ascertain biological demand for phosphates in the soil. Some plant roots, especially cluster roots, exude carboxylates that perform acid phosphatase activity, helping to mobilise phosphorus in nutrient-deficient soils. Acid phosphatase NA Glycoside hydrolase of EC class 3.2.1 that cleaves glucosidic bonds to release glucose. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Glucosidase": Glucosidases are glycoside hydrolase enzymes categorized under the EC number 3.2.1. Glucosidase NA Glucosidase that hydrolyzes terminal non-reducing beta-D-glucosyl residues, releasing glucose in the last step of cellulose breakdown, EC 3.2.1.21. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Beta-glucosidase": Beta-glucosidase catalyzes the hydrolysis of the glycosidic bonds to terminal non-reducing residues in beta-D-glucosides and oligosaccharides, with release of glucose. Beta-glucosidase NA Glycoside hydrolase that removes terminal non-reducing alpha-linked N-acetyl-D-glucosamine residues, EC 3.2.1.50. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Alpha-N-Acetylglucosaminidase": An enzyme with system name alpha-N-acetyl-D-glucosaminide N-acetylglucosaminohydrolase. This enzyme catalyses the following chemical reaction: Hydrolysis of terminal non-reducing N-acetyl-D-glucosamine residues in N-acetyl-alpha-D-glucosaminides. Alpha-N-acetylglucosaminidase NA Exocellulase that cleaves cellobiose units from the ends of cellulose chains; the non-reducing-end enzyme is EC 3.2.1.91 and the reducing-end enzyme EC 3.2.1.176. exocellulase Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Cellobiohydrolase": Exocellulases or cellobiohydrolases cleave two to four units from the ends of the exposed chains produced by endocellulase, resulting in tetrasaccharides or disaccharides, such as cellobiose. Exocellulases are further classified into type I, that work processively from the reducing end of the cellulose chain, and type II, that work processively from the nonreducing end. Cellobiohydrolase NA Glycoside hydrolase that releases xylose residues from xylose-containing oligosaccharides and polysaccharides; the form assayed in soils is beta-xylosidase, EC 3.2.1.37, which acts on the non-reducing ends of xylan and xylo-oligosaccharides. beta-xylosidase Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Xylosidase": An enzyme with system name 4-beta-D-xylan xylohydrolase. This enzyme catalyses the following chemical reaction: Hydrolysis of (1->4)-beta-D-xylans, to remove successive D-xylose residues from the non-reducing termini. Xylosidase NA Photosynthetic microorganisms drifting in the water column of oceans, lakes, and rivers, including microalgae and cyanobacteria. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Phytoplankton": Measurement of phytoplankton with no differentiation between species Phytoplankton NA Heterotrophic animals and protists that drift in the water column of oceans, lakes, and rivers. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Zooplankton": Zooplanktonic organisms, non-specific Zooplankton NA Organisms living on, in, or near the bottom of a water body. benthic organisms Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Benthos": Benthic species Benthos NA Class of unicellular flagellate algae, the Cryptophyceae, common in freshwater and coastal phytoplankton. Cryptophyceae cryptomonads Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Cryptophytes": The chlorophyll a concentration contributed by cryptophytes Cryptophytes NA Unicellular flagellate protists of the Dinophyceae, many photosynthetic and some heterotrophic, prominent in marine phytoplankton and in harmful algal blooms. Dinophyceae Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Dinoflagellates": The chlorophyll a concentration contributed by Dinoflagellates Dinoflagellates NA Oxygenic photosynthetic bacteria that carry chlorophyll a and phycocyanin, found in water, soil crusts, and symbioses. Cyanobacteriota blue-green algae Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Blue-green algae (cyanobacteria), phycocyanin": Blue-green algae (cyanobacteria) with phycocyanin pigments Cyanobacteria NA Gram-negative, rod-shaped bacteria that ferment lactose with gas and acid production at 35 to 37 degrees Celsius, used as an indicator of the sanitary quality of water. coliforms total coliform Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Coliform, total": Total Coliform Coliform bacteria NA Coliform bacteria that ferment lactose at 44.5 degrees Celsius, indicating contamination by the feces of warm-blooded animals. thermotolerant coliforms Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Coliform, fecal": Fecal Coliform Fecal coliform bacteria NA Genus of Gram-positive cocci of the animal gut, used as an indicator of fecal contamination, especially of marine recreational waters. enterococci Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Enterococci": Enterococcal bacteria Enterococcus NA Gram-positive streptococci of the genera Enterococcus and Streptococcus found in the feces of warm-blooded animals, used as an indicator of fecal contamination. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Streptococci, fecal": Fecal Streptococci Fecal streptococci NA Ability of a material to conduct electric current, the ratio of current density to electric field strength, which in water and soil rises with the concentration and mobility of dissolved ions. EC Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 ODM2 speciation concept "EC": Expressed as electrical conductivity. ODM2 variable name concept "Electrical conductivity": Electrical conductivity Electrical conductivity NA Rate at which energy is transferred, converted, or used, measured in watts. Definition source - Claude Opus 5.5 through Claude Code (Sep 23 2026), ODM2 variable name alignment for issue #66 Power NA The whole amount of a quantity before any opposing process, such as respiration or loss, is subtracted. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 Gross NA The amount a quantity would reach if a limiting resource, such as water supply, were not limiting. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 Potential NA Visible mass of liquid water droplets or ice crystals suspended in the atmosphere. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 Cloud NA Solid precipitation of balls or lumps of ice, formed in convective storm clouds. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 ODM2 variable name concept "Hail": Hail is a form of solid precipitation. It is distinct from ice pellets (American English "sleet"), though the two are often confused. It consists of balls or irregular lumps of ice, each of which is called a hailstone. Hail NA Product of the mass and the velocity of a body or a parcel of fluid. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 Momentum NA Electromagnetic radiation with wavelengths between about 10 and 400 nm, shorter than visible light. UV radiation Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 Ultraviolet radiation NA Ultraviolet radiation with wavelengths from 315 to 400 nm. UV-A radiation UVA Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 Ultraviolet A radiation NA Ultraviolet radiation with wavelengths from 280 to 315 nm. UV-B radiation UVB Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 Ultraviolet B radiation NA Release of water vapor from a plant to the air, mainly through the stomata of its leaves. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 Transpiration NA Hydrated form of silica, Si(OH)4, the form in which dissolved silicon occurs in natural waters. orthosilicic acid Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 Silicic acid NA Aquatic vertebrate with gills and fins. The grouping is not monophyletic, so no single taxon corresponds to it. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 Fish NA Dead plant material, mostly seagrass, algae, and marsh plants, cast up and stranded by tides or waves along a shoreline. beach wrack tidal wrack Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 Wrack NA Number of discrete objects or organisms per unit area or per unit volume. count density Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 Distinct from Density (BERVO:8000233), which is mass per unit volume. Number density NA Loose, unconsolidated sediment of clay, silt, sand, and gravel deposited by running water in a non-marine setting. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 Alluvium NA Artificial body of water impounded behind a dam or in a basin for storage. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 Reservoir NA Hole drilled or dug into the ground to reach groundwater. well Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 Water well NA Solid bottom of the sea or ocean. sea bed seabed ocean floor Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 Sea floor NA Underground layer of permeable rock or unconsolidated material that holds groundwater and yields it to wells. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 Aquifer NA Aquifer bounded above by a layer of low permeability, so that its water is under pressure greater than atmospheric. artesian aquifer Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 Confined aquifer NA Lithified rock that lies under the loose regolith at the land surface. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 Bedrock NA Layer of soil parallel to the soil surface whose physical, chemical, and biological properties differ from those of the layers above and below it. soil layer Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Soil horizon": A soil horizon is a layer parallel to the soil surface, whose physical characteristics differ from the layers above and beneath. Each soil type usually has three or four horizons. Soil horizon NA Linear polymer of deoxyribonucleotides joined by phosphodiester bonds that carries the genetic information of cells and many viruses. DNA Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 Deoxyribonucleic acid NA Glycoside hydrolase that removes terminal non-reducing N-acetyl-beta-D-glucosamine residues, releasing N-acetylglucosamine in the breakdown of chitin and peptidoglycan, EC 3.2.1.52. N-acetyl-beta-D-glucosaminidase NAG chitobiase Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 Beta-N-acetylglucosaminidase NA Oxidoreductase that oxidizes phenolic compounds with molecular oxygen, such as laccase, EC 1.10.3.2, and catechol oxidase, EC 1.10.3.1, active in the breakdown of lignin and the formation of humus. polyphenol oxidase Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 Phenol oxidase NA Technique that determines the atomic and molecular structure of a crystalline material from the directions and intensities into which the material diffracts a beam of incident X-rays, used to identify minerals. XRD X-ray crystallography Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Diffraction, X-ray (XRD)": X-ray crystallography (XRC) is a technique used for determining the atomic and molecular structure of a crystal, in which the crystalline structure causes a beam of incident X-rays to diffract into many specific directions. X-ray diffraction NA Technique that determines the elemental composition of a material from the characteristic secondary X-rays the material emits when excited by high-energy X-rays or gamma rays. XRF Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Fluorescence, X-ray (XRF)": X-ray fluorescence (XRF) is the emission of characteristic "secondary" (or fluorescent) X-rays from a material that has been excited by bombarding with high-energy X-rays or gamma rays. X-ray fluorescence NA Technique that identifies molecules and minerals from the inelastic scattering of monochromatic light, in which scattered photons gain or lose energy to molecular vibrations. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 Raman spectroscopy NA Raman scattering in which the material absorbs energy and the scattered photon has a lower energy, a longer wavelength, than the incident photon. Stokes scatter Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Scatter, Stokes": The material absorbs energy and the emitted photon has a lower energy than the incident photon. This outcome is labeled Stokes Raman scattering in honor of George Stokes who showed in 1852 that fluorescence is due to light emission at longer wavelength (now known to correspond to lower energy) than the absorbed incident light. Stokes Raman scattering NA Raman scattering in which the material loses energy and the scattered photon has a higher energy, a shorter wavelength, than the incident photon. anti-Stokes scatter Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Scatter, anti-stokes": The material loses energy and the emitted photon has a higher energy than the absorbed photon. This outcome is labeled anti-Stokes Raman scattering. Anti-Stokes Raman scattering NA Geophysical technique that maps subsurface layers from the travel times of seismic waves refracted along the boundaries between layers of different seismic velocity, recorded by an array of geophones. seismic refraction survey Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Seismic refraction": Seismic refraction is a geophysical principle (see refraction) governed by Snell's Law. Used in the fields of engineering geology, geotechnical engineering and exploration geophysics, seismic refraction traverses (seismic lines) are performed using a seismograph(s) and/or geophone(s), in an array and an energy source. Seismic refraction NA Carbon to nitrogen ratio in which carbon and nitrogen are each measured as a mass. C:N mass ratio Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Carbon to nitrogen mass ratio": Carbon to nitrogen (C:N) mass ratio. Carbon to nitrogen mass ratio NA Carbon to nitrogen ratio in which carbon and nitrogen are each measured as an amount of substance, in moles. C:N molar ratio Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 ODM2 variable name concept "Carbon to nitrogen molar ratio": Carbon to nitrogen (C:N) molar ratio. Carbon to nitrogen molar ratio NA Orthorhombic polymorph of calcium carbonate, more soluble than calcite, deposited in the shells and skeletons of corals, pteropods, and many mollusks. Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 Aragonite NA Fraction of dissolved organic matter that absorbs ultraviolet and visible light, chiefly humic and fulvic substances, which gives natural water a yellow to brown color. CDOM chromophoric dissolved organic matter gelbstoff yellow substance Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 ODM2 variable name concept "Colored dissolved organic matter": The concentration of colored dissolved organic matter (humic substances). ODM2 defines the concentration. BERVO keeps the material, which Ultraviolet absorption coefficient (BERVO:0002103), Dissolved organic matter fluorescence (BERVO:0002107), Fluorescence index (BERVO:0002108), and Humification index (BERVO:0002109) measure. Colored dissolved organic matter NA Absorbance of a medium per unit optical path length, the rate at which the medium absorbs radiation of a given wavelength along a path through it, in decadic or Napierian form. Absorbance (BERVO:8000236) has no dimension. The absorption coefficient is that absorbance divided by the path length, in m-1. Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 Absorption coefficient NA Carbon held in dissolved acetate, the organic acid that fermentation produces and that acetotrophic methanogens and aerobic bacteria consume. acetate-C Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), carbon measurement_ofs review for PR #123 EcoSIM keeps acetate as a pool of its own, apart from the rest of the dissolved organic carbon, so this term is a sibling of Dissolved organic carbon (BERVO:8000097), not a kind of it. It is the carbon in acetate, not the acetate ion itself, which is Acetate (BERVO:8000205). Acetate carbon NA Rapid exothermic oxidation of a material that releases heat together with combustion products such as gases, particles, and solid residues. burning Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Combustion NA Fire that is unplanned and uncontrolled and burns vegetation, whether on wild or rural land. wildland fire Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 In US agency usage (NWCG), wildland fire covers both wildfire and prescribed fire, so it is a related synonym here, although ENVO lists it as exact. Wildfire NA Fire that is planned, set deliberately, and kept under human control to meet land management objectives such as reducing fuel load. controlled burn planned burn prescribed burn Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Prescribed fire NA Prescribed fire in which cut vegetation and debris are gathered into piles and burned. pile burn Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Pile burning NA Prescribed fire set across a defined area so that it spreads through the fuels in place. broadcast burn Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Broadcast burning NA Fire that burns through the crowns of trees and shrubs, consuming live and dead canopy fuel. crowning fire Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Crown fire NA Fire that burns surface fuels such as litter, fallen wood, herbaceous plants, and low shrubs without spreading into the canopy. Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Surface fire NA Fire that burns organic material below the surface litter, such as duff, peat, and roots, usually by smoldering. Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Ground fire NA Phase of combustion in which volatile gases released from heated fuel burn in a visible flame. flaming Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Flaming combustion NA Slow, flameless phase of combustion in which oxygen reacts directly at the surface of solid fuel, typical of duff, peat, and large woody fuel. smoldering smouldering combustion residual smoldering combustion Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Smoldering combustion NA Combustible material consumed by a fire, chiefly living or dead vegetation and other organic matter in a landscape, as distinct from fuels burned to produce energy such as coal, oil, or gas. fire fuel wildland fuel Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Fuel NA Fuel held in the crowns of trees, including foliage, branches, and dead material suspended in the canopy. Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Canopy fuel NA Fuel in the live and dead stems and foliage of shrubs. Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Shrub fuel NA Fuel in grasses, forbs, and other non-woody plants. nonwoody fuel Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Herbaceous fuel NA Fuel in dead wood on or near the ground, such as fallen branches, logs, and stumps. dead woody fuel downed woody material Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Woody fuel NA Partly decomposed organic material lying beneath the litter layer and above the mineral soil. Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Duff NA Airborne mixture of gases and fine solid and liquid particles released by combustion. Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Smoke NA Solid, mostly mineral residue left after organic material has burned. Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Ash NA Porous, carbon-rich solid residue formed when wood or other organic material is heated with little or no oxygen. Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Charcoal NA Fine, carbon-rich particles formed by the incomplete combustion of organic material. Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Soot NA Particulate matter made up of particles 2.5 micrometres or less in aerodynamic diameter. PM2.5 fine respirable suspended particulate matter Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 Fine particulate matter NA Colourless, odourless, toxic gas of one carbon and one oxygen atom, produced mainly by the incomplete combustion of carbon-bearing material. CO Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 The formula CO is a related rather than an exact synonym, unlike CO2 on Carbon dioxide, because case-insensitive lexical matching conflates it with Co, an exact synonym of Cobalt (ROBOT report rule duplicate_exact_synonym). Carbon monoxide NA Degree to which a fire changes an ecosystem, usually judged by vegetation mortality, loss of organic matter, and soil heating. burn severity Definition source - Claude Opus 5.5 through Claude Code (Oct 6 2026), fire terms for issue #134 EnvThes fire severity index (http://vocabs.lter-europe.net/EnvThes/22120) is an index of this quality, not the quality itself, so it is not mapped. Fire severity NA Water whose quality has been degraded by domestic, commercial, or industrial use, or by runoff from built surfaces, and that is collected for treatment or disposal. waste water used water Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Not placed under Water (BERVO:8000102), unlike Groundwater or Surface water: Water is a Chemical cross-referenced to CHEBI:15377, and a mixture of water and wastes is not the compound H2O. Wastewater NA Wastewater that carries human excreta, feces and urine, together with the other domestic and municipal wastes discharged with it. domestic wastewater municipal wastewater sanitary sewage Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 The env_medium of every biosample in the Global Sewage Project, BioProject PRJEB13831. Sewage NA Wastewater produced by industrial or commercial processes, carrying chemical contaminants other than those of human excreta. industrial effluent Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Industrial wastewater NA Untreated wastewater as it enters a wastewater treatment plant or one of its treatment stages. wastewater influent influent raw sewage raw wastewater Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 The Global Sewage Project, BioProject PRJEB13831 sampled sewage in the main sewer lines before the treatment plant inlet (Hendriksen et al. 2019, Nat Commun 10:1124, doi:10.1038/s41467-019-08853-3). Influent wastewater NA Wastewater that has passed through one or more treatment stages and is discharged to the environment or reused. wastewater effluent effluent reclaimed water Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 ENVO places treated wastewater under liquid water rather than waste water. BERVO keeps it under Wastewater, as the outflow of the same treatment stream as Influent wastewater (BERVO:8000949). Treated wastewater NA Water from rain or snowmelt that runs off land and built surfaces and is collected by storm sewers or combined sewers. storm water stormwater runoff Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Not placed under Water (BERVO:8000102), unlike Groundwater or Surface water: Water is a Chemical cross-referenced to CHEBI:15377, and a mixture of water and wastes is not the compound H2O. Stormwater is a material of its own rather than a Wastewater, though combined sewers carry the two together. Stormwater NA Semisolid residue separated from wastewater during treatment, or left by industrial processes. Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Sludge NA Sludge settled out of wastewater during primary treatment, before biological treatment. raw primary sludge Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Primary sludge NA Aerated suspension of microbial flocs and the solids they hold, kept in secondary treatment to degrade the organic matter in wastewater. Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Activated sludge NA Sludge produced by biological secondary treatment, chiefly surplus microbial biomass wasted from an activated sludge or other biological process. biological sludge waste activated sludge Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Secondary sludge NA Sludge in or discharged from an anaerobic digester, stabilized by anaerobic microbial degradation of its organic matter. digestate digested sludge Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Anaerobic digester sludge NA Material composed mainly of feces, the waste expelled from an animal's digestive tract. faeces feces stool Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Fecal material NA Sewer that conveys wastewater in an uncovered channel at the ground surface rather than in a closed pipe. open drain open sewer line Common where cities lack closed sewer networks. Eleven biosamples in the Global Sewage Project, BioProject PRJEB13831 came from open sewer lines. Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Open sewer NA Covered vertical shaft that gives access from the ground surface to a sewer or other underground utility for inspection, maintenance, and sampling. access chamber maintenance hole Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Manhole NA Area of land, with the buildings and population in it, whose wastewater drains to a given point in a sewer network, such as a treatment plant inlet or a sampling manhole. sewage catchment sewer catchment sewer catchment area Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 The unit of population that wastewater-based surveillance describes. ENVO has no equivalent class. Sewershed NA Biome of densely settled, urbanized land, shaped by buildings, paved surfaces, and the infrastructure that supplies and drains them. Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 The env_broad_scale of every biosample in the Global Sewage Project, BioProject PRJEB13831. Urban biome NA Process of removing contaminants from wastewater so that it can be returned to the environment or reused, usually in a sequence of physical, biological, and chemical stages. wastewater treatment process sewage treatment Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Wastewater treatment NA First stage of wastewater treatment, removing coarse solids, grit, and floating material from raw wastewater by screening and settling. pre-treatment preliminary treatment Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Recorded in MIxS by the pre_treatment field (MIXS:0000348). Preliminary wastewater treatment NA Stage of wastewater treatment that settles suspended solids and floating material out of wastewater, producing primary sludge and a more uniform liquid for biological treatment. primary treatment Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Recorded in MIxS by the primary_treatment field (MIXS:0000349). Primary wastewater treatment NA Stage of wastewater treatment in which microorganisms degrade the dissolved and suspended organic matter in wastewater, as in an activated sludge process, trickling filter, or lagoon. biological wastewater treatment secondary treatment Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Recorded in MIxS by the secondary_treatment field (MIXS:0000351). Secondary wastewater treatment NA Stage of wastewater treatment after secondary treatment that further improves effluent quality before discharge or reuse, such as by nutrient removal, filtration, or disinfection. advanced wastewater treatment tertiary treatment Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Recorded in MIxS by the tertiary_treatment field (MIXS:0000352). Tertiary wastewater treatment NA Sampling method that combines several portions of a material, taken over a period or at several points, into one sample representing the average over that period or area. Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Composite sampling NA Composite sampling of a flowing liquid in which each portion is taken, or sized, in proportion to the volume that has flowed past the sampling point. flow-proportional sampling flow-weighted composite sampling Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 The preferred method in the Global Sewage Project, BioProject PRJEB13831, over 24 hours (Hendriksen et al. 2019, Nat Commun 10:1124, doi:10.1038/s41467-019-08853-3). Flow-proportional composite sampling NA Composite sampling of a flowing liquid in which portions of equal size are taken at equal time intervals. time-proportional sampling time-weighted composite sampling Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Time-proportional composite sampling NA Sampling method in which a single portion of material is collected at one place and time. point sampling spot sampling Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 The fallback method in the Global Sewage Project, BioProject PRJEB13831, as three grab samples at least 5 minutes apart (Hendriksen et al. 2019, Nat Commun 10:1124, doi:10.1038/s41467-019-08853-3). Grab sampling NA Monitoring of the health of the population of a sewershed by measuring pathogens, antimicrobial resistance genes, chemicals, or other markers of human origin in its wastewater. wastewater surveillance WBE sewage surveillance wastewater-based epidemiology Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Wastewater-based surveillance NA Substance that kills or slows the growth of microorganisms such as bacteria, fungi, viruses, or protozoa. antibiotic antimicrobial "Antibiotic" is related, not exact: it usually means an antibacterial agent. Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Antimicrobial agent NA Ability of a microorganism to survive or grow in the presence of an antimicrobial agent at a concentration that inhibits or kills susceptible strains of the same kind. AMR antibiotic resistance drug resistance Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Antimicrobial resistance NA Gene whose product confers antimicrobial resistance on a microorganism, whether carried on its chromosome or on a mobile genetic element such as a plasmid. ARG antibiotic resistance gene resistance gene Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 In metagenomes, usually identified by matching sequences to a reference database such as ResFinder or CARD. The Global Sewage Project, BioProject PRJEB13831 used ResFinder (Hendriksen et al. 2019, Nat Commun 10:1124, doi:10.1038/s41467-019-08853-3). Antimicrobial resistance gene NA Collection of all antimicrobial resistance genes, and their precursors, in a microbial community or environment. antibiotic resistome antimicrobial resistome Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Resistome NA Organism, or virus, able to cause disease in a host. human pathogen infectious agent A role, not a taxon, and it includes viruses, so it sits under Concept rather than Organism (BERVO:8000717). Pair with BERVO:involves_taxa to name the organism or virus. Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Pathogen NA Place at which a sample is taken, such as a point in a sewer network, a treatment plant inlet, or a station in a water body. sampling location sampling site Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Distinct from Environmental sample location (BERVO:8000514), which is the location of the sample itself as recorded with it. Sampling point NA Portion of the solids in a water, wastewater, or sludge sample that is lost on ignition at 550 degrees Celsius, taken as a measure of their organic matter. VS Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 The material measured by Total volatile solids (BERVO:0002095) and its dissolved and suspended fractions. Volatile solids NA Hydrolysis species of iron(III) in which one hydroxide group is bound to a single iron(III) ion, giving a net charge of 2+; the first species in the stepwise hydrolysis of ferric iron in soil solution. Fe(OH)(2+) FeOH(2+) Iron monohydroxide Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) Iron(III) monohydroxide NA Hydrolysis species of aluminum(III) in which one hydroxide group is bound to a single aluminum(III) ion, giving a net charge of 2+; the first species in the stepwise hydrolysis of aluminum in soil solution. Al(OH)(2+) AlOH(2+) Definition source - Claude Opus 5.5 through Claude Code, from EcoSIM source at commit c5e0ae6 (Oct 14 2026) Aluminum monohydroxide NA Mineral of calcium sulfate dihydrate, CaSO4·2H2O, that accumulates in soils of dry regions. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), HWSD2 alignment for issue #120 Gypsum NA Soil class at the highest level of the World Reference Base for Soil Resources, defined by diagnostic horizons, properties, and materials that reflect the main soil-forming processes. WRB 2022 recognizes 32. reference soil group RSG Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 WRB reference soil group NA Soil with a clay-enriched argic subsoil horizon of low-activity clay and low base saturation, typical of strongly weathered land in the humid tropics and subtropics. Acrisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code AC. Acrisol NA Soil with a clay-enriched argic subsoil horizon of high-activity clay and low base saturation, with a large share of exchangeable aluminum. Alisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code AL. Alisol NA Soil developed in volcanic ash or other volcanic material, dominated by short-range-order minerals such as allophane or by aluminum-humus complexes, which give it a low bulk density and a high phosphate retention. Andosols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code AN. Andosol NA Soil profoundly modified by long-continued human activity, such as cultivation with additions of organic material, deposition of irrigation sediment, or wet cultivation. Anthrosols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code AT. Anthrosol NA Soil that is sandy to a depth of at least 100 cm and has little horizon development. Arenosols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code AR. Arenosol NA Soil with a substantial accumulation of secondary calcium carbonate, common in dry regions. Calcisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code CL. Calcisol NA Soil with incipient horizon differentiation in the subsoil, a cambic horizon, shown by structure formation, colour change, or removal of carbonates. Cambisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code CM. Cambisol NA Soil with a thick, very dark, humus-rich chernic surface horizon and secondary carbonates in the subsoil, typical of steppe grassland. Chernozems Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code CH. Chernozem NA Soil with permafrost within 100 cm of the surface, often showing cryoturbation. Cryosols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code CR. Cryosol NA Soil with a layer of secondary silica accumulation, a duric or petroduric horizon, within 100 cm of the surface, found in arid and semi-arid regions. Durisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 Not among the HWSD2 WRB2 codes. Durisol NA Deeply and intensely weathered soil with a ferralic subsoil horizon dominated by kaolinite and iron and aluminum oxides, with a very low cation exchange capacity, typical of the humid tropics. Ferralsols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code FR. Ferralsol NA Soil developed in recent fluvial, lacustrine, or marine deposits that shows the stratification of the deposits rather than horizon development. Fluvisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code FL. Fluvisol NA Soil saturated by groundwater long enough to develop reducing conditions and gleyic colour patterns near the surface. Gleysols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code GL. Gleysol NA Soil with a substantial accumulation of secondary gypsum, found in dry regions. Gypsisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code GY. Gypsisol NA Soil formed in organic material, such as peat, to a considerable depth. Histosols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code HS. Histosol NA Soil with a dark, humus-rich mollic surface horizon, thinner and less dark than that of a Chernozem, and secondary carbonates in the subsoil, typical of dry steppe. Kastanozems Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code KS. Kastanozem NA Soil that is very shallow over hard rock or is extremely gravelly or stony. Leptosols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code LP. Leptosol NA Soil with a clay-enriched argic subsoil horizon of low-activity clay and high base saturation, typical of seasonally dry tropical and subtropical regions. Lixisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code LX. Lixisol NA Soil with a clay-enriched argic subsoil horizon of high-activity clay and high base saturation. Luvisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code LV. Luvisol NA Deep, well-drained, red tropical soil with a clay-rich nitic subsoil horizon of strong, nut-shaped structure with shiny aggregate faces. Nitisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code NT. Nitisol NA Soil with a dark, humus-rich mollic surface horizon and high base saturation, leached of secondary carbonates to a greater depth than a Chernozem or Kastanozem, typical of moist steppe and prairie. Phaeozems Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code PH. Phaeozem NA Soil with a light-coloured, seasonally waterlogged surface horizon over an abrupt textural change to a dense, slowly permeable subsoil. Planosols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code PL. Planosol NA Soil with a substantial accumulation of iron oxides as plinthite, which hardens irreversibly on repeated drying, or as petroplinthite or pisoliths. Plinthosols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code PT. Plinthosol NA Acid soil with a bleached, ash-grey eluvial horizon over a spodic horizon in which humus with aluminum and iron has accumulated. Podzols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code PZ. Podzol NA Weakly developed mineral soil in unconsolidated material that does not qualify for any other reference soil group. Regosols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code RG. Regosol NA Soil with a clay-enriched argic subsoil horizon into which tongues of bleached, coarser-textured material interfinger, forming a retic pattern. Retisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code RT. Retisol NA Soil with a high concentration of soluble salts at some time of the year, forming a salic horizon. Solonchaks Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code SC. Solonchak NA Soil with a dense, strongly structured, clay-enriched natric subsoil horizon with a high proportion of exchangeable sodium. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code SN. Solonetz NA Soil with a perched water table above a slowly permeable layer, which causes temporary saturation and stagnic colour patterns of reducing conditions. Stagnosols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code ST. Stagnosol NA Soil whose properties and development are dominated by its technical origin, containing a significant amount of artefacts or sealed by technic hard material. Technosols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code TC. Technosol NA Soil with a dark, humus-rich umbric surface horizon of low base saturation, typical of cool, humid regions. Umbrisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code UM. Umbrisol NA Clay-rich soil that shrinks and swells with changes in water content, forming deep, wide cracks when dry and slickensides in the subsoil. Vertisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after IUSS Working Group WRB (2022) World Reference Base for Soil Resources, 4th edition; issue #120 HWSD2: WRB2 code VR. Vertisol NA Soil class at the highest of the six levels of USDA Soil Taxonomy, defined by diagnostic horizons and properties that reflect the dominant soil-forming processes. Soil Taxonomy recognizes 12. soil order Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Survey Staff (2022) Keys to Soil Taxonomy, 13th edition; issue #120 USDA soil order NA Soil with a clay-enriched argillic, kandic, or natric subsoil horizon and moderate to high base saturation, typical of humid temperate forest. Alfisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Survey Staff (2022) Keys to Soil Taxonomy, 13th edition; issue #120 Alfisol NA Soil with andic properties, dominated by short-range-order minerals or aluminum-humus complexes, usually formed in volcanic ash. Andisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Survey Staff (2022) Keys to Soil Taxonomy, 13th edition; issue #120 Andisol NA Soil of dry regions with an aridic moisture regime and a diagnostic subsurface horizon, such as an accumulation of carbonates, gypsum, or salts. Aridisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Survey Staff (2022) Keys to Soil Taxonomy, 13th edition; issue #120 Aridisol NA Soil with little or no evidence of pedogenic horizon development. Entisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Survey Staff (2022) Keys to Soil Taxonomy, 13th edition; issue #120 Entisol NA Soil with permafrost within 100 cm of the surface, or with gelic materials within 100 cm and permafrost within 200 cm. Gelisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Survey Staff (2022) Keys to Soil Taxonomy, 13th edition; issue #120 Gelisol NA Soil formed mostly in organic soil materials, such as peat, muck, or mucky peat. Histosols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Survey Staff (2022) Keys to Soil Taxonomy, 13th edition; issue #120 USDA Soil Taxonomy order Histosols. Distinct from the WRB reference soil group Histosol (BERVO:8000997). Histosol (USDA) NA Soil with weakly developed subsurface horizons, such as a cambic horizon, that show alteration but not the accumulation that defines other orders. Inceptisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Survey Staff (2022) Keys to Soil Taxonomy, 13th edition; issue #120 Inceptisol NA Soil with a thick, dark, humus-rich mollic surface horizon and high base saturation, typical of grassland. Mollisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Survey Staff (2022) Keys to Soil Taxonomy, 13th edition; issue #120 Mollisol NA Intensely weathered soil with an oxic or kandic subsoil horizon dominated by kaolinite and iron and aluminum oxides, with a very low cation exchange capacity, typical of the humid tropics. Oxisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Survey Staff (2022) Keys to Soil Taxonomy, 13th edition; issue #120 Oxisol NA Acid soil with a spodic subsurface horizon in which humus with aluminum and iron has accumulated, typically beneath a bleached albic horizon. Spodosols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Survey Staff (2022) Keys to Soil Taxonomy, 13th edition; issue #120 Spodosol NA Strongly leached soil with a clay-enriched argillic or kandic subsoil horizon and low base saturation, typical of humid warm-temperate and tropical regions. Ultisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Survey Staff (2022) Keys to Soil Taxonomy, 13th edition; issue #120 Ultisol NA Clay-rich soil that shrinks and swells with changes in water content, forming wide cracks that open and close periodically and slickensides or wedge-shaped aggregates in the subsoil. Vertisols Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Survey Staff (2022) Keys to Soil Taxonomy, 13th edition; issue #120 USDA Soil Taxonomy order Vertisols. Distinct from the WRB reference soil group Vertisol (BERVO:8001014). Vertisol (USDA) NA Soil defined by the range of sand, silt, and clay in its fine earth that places it in one area of the USDA texture triangle. There are 12 such classes. soil textural class Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Science Division Staff (2017) Soil Survey Manual, USDA Handbook 18; issue #120 USDA soil texture class NA Soil whose fine earth is at least 85 percent sand by mass, with the silt percentage plus 1.5 times the clay percentage below 15. sand Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Science Division Staff (2017) Soil Survey Manual, USDA Handbook 18; issue #120 USDA texture class sand, labelled to keep it apart from the particle-size fraction Sand. HWSD2: TEXTURE_USDA code 13. Sand texture class NA Soil whose fine earth is 70 to 91 percent sand by mass, with the silt percentage plus 1.5 times the clay percentage at least 15 and the silt percentage plus twice the clay percentage below 30. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Science Division Staff (2017) Soil Survey Manual, USDA Handbook 18; issue #120 HWSD2: TEXTURE_USDA code 12. Loamy sand NA Soil whose fine earth either has at most 20 percent clay, at least 52 percent sand, and a silt percentage plus twice the clay percentage above 30, or has less than 7 percent clay, less than 50 percent silt, and 43 to 52 percent sand, all by mass. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Science Division Staff (2017) Soil Survey Manual, USDA Handbook 18; issue #120 HWSD2: TEXTURE_USDA code 11. Sandy loam NA Soil whose fine earth is 7 to 27 percent clay, 28 to 50 percent silt, and no more than 52 percent sand by mass. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Science Division Staff (2017) Soil Survey Manual, USDA Handbook 18; issue #120 HWSD2: TEXTURE_USDA code 9. Loam NA Soil whose fine earth is either at least 50 percent silt and 12 to 27 percent clay by mass, or 50 to 80 percent silt and less than 12 percent clay. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Science Division Staff (2017) Soil Survey Manual, USDA Handbook 18; issue #120 HWSD2: TEXTURE_USDA code 7. Silt loam NA Soil whose fine earth is at least 80 percent silt and less than 12 percent clay by mass. silt Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Science Division Staff (2017) Soil Survey Manual, USDA Handbook 18; issue #120 USDA texture class silt, labelled to keep it apart from the particle-size fraction Silt. HWSD2: TEXTURE_USDA code 6. Silt texture class NA Soil whose fine earth is 20 to 35 percent clay, less than 28 percent silt, and more than 45 percent sand by mass. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Science Division Staff (2017) Soil Survey Manual, USDA Handbook 18; issue #120 HWSD2: TEXTURE_USDA code 10. Sandy clay loam NA Soil whose fine earth is 27 to 40 percent clay and more than 20 but no more than 45 percent sand by mass. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Science Division Staff (2017) Soil Survey Manual, USDA Handbook 18; issue #120 HWSD2: TEXTURE_USDA code 5. Clay loam NA Soil whose fine earth is 27 to 40 percent clay and no more than 20 percent sand by mass. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Science Division Staff (2017) Soil Survey Manual, USDA Handbook 18; issue #120 HWSD2: TEXTURE_USDA code 4. Silty clay loam NA Soil whose fine earth is at least 35 percent clay and at least 45 percent sand by mass. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Science Division Staff (2017) Soil Survey Manual, USDA Handbook 18; issue #120 HWSD2: TEXTURE_USDA code 8. Sandy clay NA Soil whose fine earth is at least 40 percent clay and at least 40 percent silt by mass. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Science Division Staff (2017) Soil Survey Manual, USDA Handbook 18; issue #120 HWSD2: TEXTURE_USDA code 2. Silty clay NA Soil whose fine earth is at least 40 percent clay, no more than 45 percent sand, and less than 40 percent silt by mass. clay Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after Soil Science Division Staff (2017) Soil Survey Manual, USDA Handbook 18; issue #120 USDA texture class clay, labelled to keep it apart from the particle-size fraction Clay. HWSD2: TEXTURE_USDA splits this class into heavy clay (code 1) and light clay (code 3). Clay texture class NA Soil of the clay texture class whose fine earth is more than 60 percent clay by mass. heavy clay Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after FAO (2006) Guidelines for Soil Description, 4th edition; issue #120 FAO subdivision of the USDA clay class. HWSD2: TEXTURE_USDA code 1, Clay (heavy). Heavy clay texture class NA Soil of the clay texture class whose fine earth is no more than 60 percent clay by mass. light clay Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after FAO (2006) Guidelines for Soil Description, 4th edition; issue #120 FAO subdivision of the USDA clay class. HWSD2: TEXTURE_USDA code 3, Clay (light). Light clay texture class NA Soil defined by the group it falls in under the Unified Soil Classification System, an engineering classification by grain size distribution and, for fine-grained soil, by liquid limit and plasticity index. Each group has a two-letter symbol. Unified Soil Classification System group Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after ASTM D2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); issue #120 USCS soil group NA Coarse-grained soil, more than half retained on a 0.075 mm sieve, in which gravel, coarser than 4.75 mm, makes up most of the coarse fraction, with less than 5 percent fines and a coefficient of uniformity of at least 4 and a coefficient of curvature of 1 to 3. GW Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after ASTM D2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); issue #120 USCS group symbol GW. Well-graded gravel NA Coarse-grained soil, more than half retained on a 0.075 mm sieve, in which gravel, coarser than 4.75 mm, makes up most of the coarse fraction, with less than 5 percent fines and a grain size distribution that fails the gradation criteria of a well-graded gravel. GP Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after ASTM D2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); issue #120 USCS group symbol GP. Poorly graded gravel NA Coarse-grained soil, more than half retained on a 0.075 mm sieve, in which gravel, coarser than 4.75 mm, makes up most of the coarse fraction, with more than 12 percent fines that classify as silt. GM Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after ASTM D2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); issue #120 USCS group symbol GM. Silty gravel NA Coarse-grained soil, more than half retained on a 0.075 mm sieve, in which gravel, coarser than 4.75 mm, makes up most of the coarse fraction, with more than 12 percent fines that classify as clay. GC Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after ASTM D2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); issue #120 USCS group symbol GC. Clayey gravel NA Coarse-grained soil, more than half retained on a 0.075 mm sieve, in which sand, 0.075 to 4.75 mm, makes up most of the coarse fraction, with less than 5 percent fines and a coefficient of uniformity of at least 6 and a coefficient of curvature of 1 to 3. SW Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after ASTM D2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); issue #120 USCS group symbol SW. Well-graded sand NA Coarse-grained soil, more than half retained on a 0.075 mm sieve, in which sand, 0.075 to 4.75 mm, makes up most of the coarse fraction, with less than 5 percent fines and a grain size distribution that fails the gradation criteria of a well-graded sand. SP Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after ASTM D2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); issue #120 USCS group symbol SP. Poorly graded sand NA Coarse-grained soil, more than half retained on a 0.075 mm sieve, in which sand, 0.075 to 4.75 mm, makes up most of the coarse fraction, with more than 12 percent fines that classify as silt. SM Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after ASTM D2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); issue #120 USCS group symbol SM. Silty sand NA Coarse-grained soil, more than half retained on a 0.075 mm sieve, in which sand, 0.075 to 4.75 mm, makes up most of the coarse fraction, with more than 12 percent fines that classify as clay. SC Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after ASTM D2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); issue #120 USCS group symbol SC. Clayey sand NA Fine-grained soil, at least half passing a 0.075 mm sieve, inorganic, with a liquid limit below 50 and a plasticity index below 4 or plotting below the A-line of the plasticity chart. ML Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after ASTM D2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); issue #120 USCS group symbol ML. Low-plasticity silt NA Fine-grained soil, at least half passing a 0.075 mm sieve, inorganic, with a liquid limit below 50 and a plasticity index above 7, plotting on or above the A-line of the plasticity chart. CL Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after ASTM D2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); issue #120 USCS group symbol CL. Lean clay NA Fine-grained soil, at least half passing a 0.075 mm sieve, organic silt or clay with a liquid limit below 50. OL Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after ASTM D2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); issue #120 USCS group symbol OL. Low-plasticity organic soil NA Fine-grained soil, at least half passing a 0.075 mm sieve, inorganic, with a liquid limit of 50 or more, plotting below the A-line of the plasticity chart. MH Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after ASTM D2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); issue #120 USCS group symbol MH. Elastic silt NA Fine-grained soil, at least half passing a 0.075 mm sieve, inorganic, with a liquid limit of 50 or more, plotting on or above the A-line of the plasticity chart. CH Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after ASTM D2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); issue #120 USCS group symbol CH. Fat clay NA Fine-grained soil, at least half passing a 0.075 mm sieve, organic silt or clay with a liquid limit of 50 or more. OH Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after ASTM D2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); issue #120 USCS group symbol OH. High-plasticity organic soil NA Soil made up primarily of organic matter, dark in colour and with an organic odour, such as peat. PT Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), after ASTM D2487, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); issue #120 USCS group symbol PT. Highly organic soil NA Liquid water held in the pore spaces of soil, sediment, or rock, together with the solutes dissolved in it. interstitial water porewater soil solution Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ENVO interstitial water (ENVO:03600009) is defined for rocks and sediments only, so it is not cross-referenced as an equivalent of this broader term. Pore water NA Ground material, mostly soil, sediment, or rock with any ice and organic material it holds, that stays at or below the freezing point of water for two or more consecutive years. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Permafrost NA Divalent cation of iron, the reduced form of iron, which stays dissolved in water under anoxic conditions. Fe(II) Fe2+ Iron(2+) ferrous iron Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Iron(II) NA Sum of hydrogen sulfide, bisulfide, and sulfide ion dissolved in water, forms of reduced inorganic sulfur whose proportions shift with pH. total dissolved sulfide H2S hydrogen sulfide Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Dissolved sulfide NA Stable isotope of carbon with six protons and seven neutrons, 13C, whose abundance relative to carbon-12 is reported as delta 13C. 13C delta 13C Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 ODM2 speciation has no carbon-13 entry. The ODM2 variable names carry it instead, as carbon_13StableIsotopeRatioDelta and the delta_13COf... names. Carbon-13 NA Spectroscopy that measures the X-ray absorption coefficient of a sample within about 40 eV of an element's absorption edge, as a function of incident X-ray energy, to determine the oxidation state and bonding environment of that element. NEXAFS XANES near-edge X-ray absorption fine structure spectroscopy Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 XANES and NEXAFS name the same measurement. NEXAFS is the usual name for soft X-ray work on light elements, such as at the carbon K-edge, and XANES for hard X-ray work on metals, such as at the iron and manganese K-edges. X-ray absorption near edge structure spectroscopy NA Technique that measures neutrons scattered elastically through small angles by a sample, to determine the size, shape, and arrangement of structures from about one to a few hundred nanometres across. SANS Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Sensitive to hydrogen, so used to detect organic matter accumulating on mineral surfaces. Small-angle neutron scattering NA Infrared spectroscopy in which a sample is exposed to broadband infrared radiation and its absorption spectrum is recovered from the resulting interferogram by a Fourier transform, used to identify functional groups. FT-IR FTIR Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Fourier transform infrared spectroscopy NA Relative difference between the ratio of a heavier to a lighter stable isotope of an element in a sample and the same ratio in a reference standard, usually reported in parts per thousand. delta value isotope delta value per mil value Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 IUPAC symbol delta (δ). A positive value means the sample is richer in the heavier isotope than the standard. Distinct from Isotope ratio (BERVO:8000466), the ratio of two isotopes itself, from which a delta is calculated against a standard. Isotope delta NA Reference material or natural reservoir whose isotope ratio defines the zero of an isotope delta scale. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Isotope reference standard NA Isotope reference standard that defines the zero of the delta scale for carbon-13, and for oxygen-18 in carbonates and carbon dioxide, realized through calcite reference materials distributed by the International Atomic Energy Agency, since the original Pee Dee Belemnite fossil is exhausted. V-PDB VPDB Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Vienna Pee Dee Belemnite NA Isotope reference standard of water, distributed by the International Atomic Energy Agency, that defines the zero of the delta scales for oxygen-18 and deuterium. VSMOW VSMOW2 Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 The original VSMOW is exhausted; VSMOW2 replaces it with the same isotope composition. Vienna Standard Mean Ocean Water NA Nitrogen gas of the atmosphere, whose uniform nitrogen-15 to nitrogen-14 ratio defines the zero of the delta scale for nitrogen-15. AIR-N2 AIR Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Atmospheric nitrogen standard NA Alkane of three carbon atoms, C3H8. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Propane NA Straight-chain alkane of four carbon atoms, C4H10. n-butane Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Butane NA Triatomic allotrope of oxygen, a reactive gas that absorbs ultraviolet radiation in the stratosphere and near the ground is a pollutant formed photochemically from nitrogen oxides and volatile organic compounds. O3 Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Ozone NA Free-radical gas of one nitrogen and one oxygen atom, emitted by soil nitrification and denitrification and by combustion, and oxidised to nitrogen dioxide in air. nitrogen monoxide Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 The formula NO is not recorded as a synonym because lexical matching conflates it with the English word. Nitric oxide NA Gas of one sulfur and two oxygen atoms, emitted by fossil fuel combustion and volcanic activity, and a precursor of sulfate aerosol and acid deposition. SO2 Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Sulfur dioxide NA Air with its water vapor removed, the reference basis on which a gas mole fraction is reported independently of humidity. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Dry air NA Amount of substance of one constituent of a mixture divided by the total amount of substance of all its constituents. amount fraction mixing ratio Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Mixing ratio is a related synonym because flux networks, AmeriFlux among them, use it for a mole fraction in dry air. In meteorology a mixing ratio is usually a mass ratio of a constituent to dry air, which is not a mole fraction. Mole fraction NA Layer of vegetation that grows beneath the main canopy of a stand without reaching it, and the space it occupies. understorey Broader than its cross-reference ENVO:01000335, which is the vegetation layer only; this term also covers the space beneath the canopy, because it is used in contexts for measurements made there. AmeriFlux BADM LAI_CANOPY_TYPE value: Understory. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Understory NA Ratio of the radiant flux reflected by a surface to the radiant flux incident on it, for a given waveband and geometry. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Reflectance NA Radiation within a defined interval of wavelengths, such as the interval sampled by a narrow-band radiometer. waveband Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Spectral band NA Spectral band in the near infrared, roughly 700 to 1300 nm, where green leaves reflect strongly. NIR band Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Near-infrared band NA Spectral band in the red part of the visible spectrum, roughly 620 to 700 nm, where chlorophyll absorbs strongly. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Red band NA Spectral band near 570 nm whose reflectance changes little with the xanthophyll cycle, used as the reference in the photochemical reflectance index. PRI reference band Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Photochemical reflectance index reference band NA Spectral band near 531 nm whose reflectance changes with the de-epoxidation state of the xanthophyll cycle, used as the target in the photochemical reflectance index. PRI target band Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Photochemical reflectance index target band NA Qualifier for a value in a time series that was estimated, for a period with no valid measurement, from other data by a gap-filling method. gapfilled AmeriFlux variable-name qualifier: _F. Placed under Quantitative value because a gap-filled value is always a number estimated in place of a measurement; Observed (BERVO:8000483) is its complement. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 3 Gap-filled NA Qualifier for a value that the team operating a measurement site quality-checked or gap-filled independently of a network's central processing. provided by PI AmeriFlux variable-name qualifier: _PI. Placed under Value rather than Quantitative value because it records who processed a value, which applies whether or not the value is numeric. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 3 Processed by site team NA Number of observations or sensors that contribute to a statistic. number of samples AmeriFlux variable-name qualifier: _N, the number of replicate sensors, or of layers in an aggregation layer index, aggregated into a value. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 3 Sample size NA Method for estimating the values of a time series for periods without a valid measurement. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 Gap-filling method NA Gap-filling method that replaces a missing flux or meteorological value with the mean of values measured under similar meteorological conditions within a moving time window, widening the window until enough similar values are found. MDS Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 FLUXNET FULLSET suffix: _MDS. Described by Reichstein et al. (2005), Global Change Biology 11:1424-1439. Marginal distribution sampling NA Method that estimates a variable at a measurement site from the corresponding atmospheric reanalysis variable, by linear regression of the reanalysis values against the site's own measurements. ERA downscaling Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 FLUXNET FULLSET suffix: _ERA, for values downscaled from the ERA reanalysis. Placed under Method rather than Gap-filling method because downscaling is not in itself gap-filling: FLUXNET uses the downscaled series to fill gaps in the _F variables, but the _ERA variables are the downscaled values themselves. Reanalysis downscaling NA Method for separating the net ecosystem exchange of carbon dioxide into gross primary production and ecosystem respiration. NEE partitioning Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 Flux partitioning method NA Flux partitioning method that fits a temperature response of ecosystem respiration to nighttime net ecosystem exchange, extrapolates it to the daytime, and takes gross primary production as the difference from net ecosystem exchange. nighttime partitioning Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 FLUXNET FULLSET suffix: _NT. Described by Reichstein et al. (2005), Global Change Biology 11:1424-1439. Nighttime flux partitioning NA Flux partitioning method that fits a light response curve with a temperature-dependent respiration term to daytime net ecosystem exchange, estimating gross primary production and ecosystem respiration together. daytime partitioning Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 FLUXNET FULLSET suffix: _DT. Described by Lasslop et al. (2010), Global Change Biology 16:187-208. Daytime flux partitioning NA Flux partitioning method that estimates ecosystem respiration from the net ecosystem exchange measured in the hours just after sunset, before nighttime stable conditions suppress turbulence. sundown respiration method Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 FLUXNET FULLSET suffix: _SR. Described by van Gorsel et al. (2009), Agricultural and Forest Meteorology 149:1919-1930. Sundown respiration partitioning NA Method that scales the sensible and latent heat fluxes by a common factor so that their sum matches the available energy, net radiation less the ground heat flux, keeping their ratio unchanged. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 FLUXNET FULLSET suffix: _CORR. Energy balance closure correction NA Friction velocity threshold applied unchanged to every year of a flux record, below which fluxes measured at night are discarded as unrepresentative. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 FLUXNET FULLSET suffix: _CUT. The threshold itself is the variable Friction velocity threshold (BERVO:0002324); this concept names how it was chosen. Constant friction velocity threshold NA Friction velocity threshold estimated separately for each year of a flux record, below which fluxes measured at night are discarded as unrepresentative. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 FLUXNET FULLSET suffix: _VUT. The threshold itself is the variable Friction velocity threshold (BERVO:0002324); this concept names how it was chosen. Variable friction velocity threshold NA Uncertainty of a value from random measurement error, estimated from the spread of measurements made under similar conditions close in time. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 FLUXNET FULLSET suffix: _RANDUNC. Random uncertainty NA Uncertainty of a value combining its random uncertainty with the uncertainty from the choice of friction velocity threshold. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 FLUXNET FULLSET suffix: _JOINTUNC. Joint uncertainty NA Value below which a stated percentage of the values of a distribution fall. quantile Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 FLUXNET FULLSET suffixes: _XX, a placeholder for the 05, 16, 25, 50, 75, 84 and 95 percentiles of the ensemble of estimates made with different friction velocity thresholds, and the bare _25 and _75 of the H_CORR and LE_CORR variables, which FLUXNET describes as their 25th and 75th percentiles. Percentile NA Member of an ensemble of estimates chosen to represent it because it agrees best with the other members, judged by model efficiency. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 FLUXNET FULLSET suffix: _REF, chosen among the 40 estimates made with different friction velocity thresholds. Reference ensemble member NA Part of a day when the sun is above the horizon. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 FLUXNET FULLSET suffix: _DAY. Flux processing counts as daytime the periods when the potential incoming shortwave radiation is above zero. Daytime NA Part of a day when the sun is below the horizon. night Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 4 FLUXNET FULLSET suffix: _NIGHT. Flux processing counts as nighttime the periods when the potential incoming shortwave radiation is zero. No cross-reference: no OBO class for night was found in NCIT or ENVO, though Daytime has NCIT:C64928. Nighttime NA Class of the land cover classification of the International Geosphere-Biosphere Programme, which divides the land surface into 17 classes of vegetation, land use and unvegetated cover. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Values of the AmeriFlux BADM variable IGBP. IGBP land cover class NA IGBP land cover class of land dominated by woody vegetation with more than 60 percent cover and taller than 2 m, of needleleaf trees that stay green all year so that the canopy is never without green foliage. ENF AmeriFlux BADM IGBP value: ENF. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Evergreen needleleaf forest (IGBP) NA IGBP land cover class of land dominated by woody vegetation with more than 60 percent cover and taller than 2 m, of broadleaf trees and shrubs that stay green all year so that the canopy is never without green foliage. EBF AmeriFlux BADM IGBP value: EBF. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Evergreen broadleaf forest (IGBP) NA IGBP land cover class of land dominated by woody vegetation with more than 60 percent cover and taller than 2 m, of needleleaf trees with an annual cycle of leaf-on and leaf-off periods. DNF AmeriFlux BADM IGBP value: DNF. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Deciduous needleleaf forest (IGBP) NA IGBP land cover class of land dominated by woody vegetation with more than 60 percent cover and taller than 2 m, of broadleaf trees with an annual cycle of leaf-on and leaf-off periods. DBF AmeriFlux BADM IGBP value: DBF. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Deciduous broadleaf forest (IGBP) NA IGBP land cover class of land dominated by woody vegetation with more than 60 percent cover and taller than 2 m, of interspersed mixtures or mosaics of the four other forest classes, none covering more than 60 percent of the landscape. MF AmeriFlux BADM IGBP value: MF. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Mixed forest (IGBP) NA IGBP land cover class of land with woody vegetation shorter than 2 m and more than 60 percent shrub canopy cover, evergreen or deciduous. CSH AmeriFlux BADM IGBP value: CSH. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Closed shrubland (IGBP) NA IGBP land cover class of land with woody vegetation shorter than 2 m and 10 to 60 percent shrub canopy cover, evergreen or deciduous. OSH AmeriFlux BADM IGBP value: OSH. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Open shrubland (IGBP) NA IGBP land cover class of land with herbaceous and other understory vegetation under a forest canopy taller than 2 m covering 30 to 60 percent. WSA AmeriFlux BADM IGBP value: WSA. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Woody savanna (IGBP) NA IGBP land cover class of land with herbaceous and other understory vegetation under a forest canopy taller than 2 m covering 10 to 30 percent. SAV AmeriFlux BADM IGBP value: SAV. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Savanna (IGBP) NA IGBP land cover class of land with herbaceous cover and less than 10 percent tree and shrub cover. GRA AmeriFlux BADM IGBP value: GRA. The AmeriFlux description of GRA also carries a sentence about permanent wetlands, which belongs to WET. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Grassland (IGBP) NA IGBP land cover class of extensive land with a permanent mixture of water and herbaceous or woody vegetation, in salt, brackish or fresh water. WET AmeriFlux BADM IGBP value: WET. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Permanent wetland (IGBP) NA IGBP land cover class of land covered by temporary crops followed by harvest and a period of bare soil, in single or multiple cropping systems. CRO AmeriFlux BADM IGBP value: CRO. Perennial woody crops are classed as the matching forest or shrubland class. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Cropland (IGBP) NA IGBP land cover class of land covered by buildings and other human-made structures. URB AmeriFlux BADM IGBP value: URB. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Urban and built-up land (IGBP) NA IGBP land cover class of land with a mosaic of cropland, forest, shrubland and grassland in which no one component covers more than 60 percent of the landscape. CVM AmeriFlux BADM IGBP value: CVM. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Cropland and natural vegetation mosaic (IGBP) NA IGBP land cover class of land under snow or ice cover for most of the year. AmeriFlux BADM IGBP value: SNO. The code SNO is not recorded as a synonym because it is a synonym of Nitric oxide storage flux (BERVO:0002250). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Snow and ice (IGBP) NA IGBP land cover class of land of exposed soil, sand or rock with less than 10 percent vegetation cover at any time of year. BSV AmeriFlux BADM IGBP value: BSV. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Barren or sparsely vegetated land (IGBP) NA IGBP land cover class of oceans, seas, lakes, reservoirs and rivers, fresh or salt. WAT AmeriFlux BADM IGBP value: WAT. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Water body (IGBP) NA Weather of a place or region averaged or otherwise summarised over a period long enough to characterise it, conventionally 30 years. BERVO grouping above Köppen climate class, whose concepts are the values of the BADM list CLIMATE_KOEPPEN; no BADM value maps to it directly. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Climate NA Class of the Köppen climate classification, which assigns a climate to one of five main groups and to subtypes by thresholds of monthly and annual temperature and precipitation. Koppen climate class Köppen-Geiger climate class Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Values of the AmeriFlux BADM variable CLIMATE_KOEPPEN. Definitions follow the thresholds of Peel, Finlayson and McMahon (2007). Köppen climate class NA Köppen climate class with the coldest month averaging at least 18 degrees Celsius and every month having at least 60 mm of precipitation. Af AmeriFlux BADM CLIMATE_KOEPPEN value: Af. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Tropical rainforest climate NA Köppen climate class with the coldest month averaging at least 18 degrees Celsius and a driest month with less than 60 mm but at least 100 mm minus one twenty-fifth of the annual precipitation. Am AmeriFlux BADM CLIMATE_KOEPPEN value: Am. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Tropical monsoon climate NA Köppen climate class with the coldest month averaging at least 18 degrees Celsius and a dry season, the driest month having less than 60 mm and less than 100 mm minus one twenty-fifth of the annual precipitation. Aw AmeriFlux BADM CLIMATE_KOEPPEN value: Aw. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Tropical savanna climate NA Köppen climate class with annual precipitation below a dryness threshold set by mean annual temperature and the seasonal distribution of precipitation, but above half of it, and a mean annual temperature of at least 18 degrees Celsius. BSh AmeriFlux BADM CLIMATE_KOEPPEN value: Bsh. AmeriFlux writes the code as Bsh and describes BSh and BWh as having very cold winters and BSk and BWk warm ones, the reverse of the Köppen subtypes, where h marks the hot and k the cold climates; this term follows Köppen. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Hot semi-arid climate NA Köppen climate class with annual precipitation below a dryness threshold set by mean annual temperature and the seasonal distribution of precipitation, but above half of it, and a mean annual temperature below 18 degrees Celsius. BSk AmeriFlux BADM CLIMATE_KOEPPEN value: Bsk. AmeriFlux writes the code as Bsk and describes BSh and BWh as having very cold winters and BSk and BWk warm ones, the reverse of the Köppen subtypes, where h marks the hot and k the cold climates; this term follows Köppen. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Cold semi-arid climate NA Köppen climate class with annual precipitation below half of a dryness threshold set by mean annual temperature and the seasonal distribution of precipitation, and a mean annual temperature of at least 18 degrees Celsius. BWh AmeriFlux BADM CLIMATE_KOEPPEN value: Bwh. AmeriFlux writes the code as Bwh and describes BSh and BWh as having very cold winters and BSk and BWk warm ones, the reverse of the Köppen subtypes, where h marks the hot and k the cold climates; this term follows Köppen. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Hot desert climate NA Köppen climate class with annual precipitation below half of a dryness threshold set by mean annual temperature and the seasonal distribution of precipitation, and a mean annual temperature below 18 degrees Celsius. BWk AmeriFlux BADM CLIMATE_KOEPPEN value: Bwk. AmeriFlux writes the code as Bwk and describes BSh and BWh as having very cold winters and BSk and BWk warm ones, the reverse of the Köppen subtypes, where h marks the hot and k the cold climates; this term follows Köppen. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Cold desert climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging between 0 and 18 degrees Celsius, precipitation in all seasons, without the dry summer or dry winter of the s and w subtypes, and the warmest month averaging at least 22 degrees Celsius. Cfa AmeriFlux BADM CLIMATE_KOEPPEN value: Cfa. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Humid subtropical climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging between 0 and 18 degrees Celsius, precipitation in all seasons, without the dry summer or dry winter of the s and w subtypes, and the warmest month averaging below 22 degrees Celsius and at least four months averaging 10 degrees Celsius or more. Cfb AmeriFlux BADM CLIMATE_KOEPPEN value: Cfb. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Temperate oceanic climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging between 0 and 18 degrees Celsius, precipitation in all seasons, without the dry summer or dry winter of the s and w subtypes, and one to three months averaging 10 degrees Celsius or more. Cfc AmeriFlux BADM CLIMATE_KOEPPEN value: Cfc. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Subpolar oceanic climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging between 0 and 18 degrees Celsius, a dry summer, the driest summer month having less than 40 mm of precipitation and less than a third of the wettest winter month, and the warmest month averaging at least 22 degrees Celsius. Csa AmeriFlux BADM CLIMATE_KOEPPEN value: Csa. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Hot-summer Mediterranean climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging between 0 and 18 degrees Celsius, a dry summer, the driest summer month having less than 40 mm of precipitation and less than a third of the wettest winter month, and the warmest month averaging below 22 degrees Celsius and at least four months averaging 10 degrees Celsius or more. Csb AmeriFlux BADM CLIMATE_KOEPPEN value: Csb. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Warm-summer Mediterranean climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging between 0 and 18 degrees Celsius, a dry winter, the driest winter month having less than a tenth of the precipitation of the wettest summer month, and the warmest month averaging at least 22 degrees Celsius. Cwa AmeriFlux BADM CLIMATE_KOEPPEN value: Cwa. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Monsoon-influenced humid subtropical climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging between 0 and 18 degrees Celsius, a dry winter, the driest winter month having less than a tenth of the precipitation of the wettest summer month, and the warmest month averaging below 22 degrees Celsius and at least four months averaging 10 degrees Celsius or more. Cwb AmeriFlux BADM CLIMATE_KOEPPEN value: Cwb. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Subtropical highland climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging between 0 and 18 degrees Celsius, a dry winter, the driest winter month having less than a tenth of the precipitation of the wettest summer month, and one to three months averaging 10 degrees Celsius or more. Cwc AmeriFlux BADM CLIMATE_KOEPPEN value: Cwc. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Cold subtropical highland climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging 0 degrees Celsius or below, precipitation in all seasons, without the dry summer or dry winter of the s and w subtypes, and the warmest month averaging at least 22 degrees Celsius. Dfa AmeriFlux BADM CLIMATE_KOEPPEN value: Dfa. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Hot-summer humid continental climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging 0 degrees Celsius or below, precipitation in all seasons, without the dry summer or dry winter of the s and w subtypes, and the warmest month averaging below 22 degrees Celsius and at least four months averaging 10 degrees Celsius or more. Dfb AmeriFlux BADM CLIMATE_KOEPPEN value: Dfb. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Warm-summer humid continental climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging 0 degrees Celsius or below, precipitation in all seasons, without the dry summer or dry winter of the s and w subtypes, and one to three months averaging 10 degrees Celsius or more and the coldest month at or above -38 degrees Celsius. Dfc AmeriFlux BADM CLIMATE_KOEPPEN value: Dfc. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Subarctic climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging 0 degrees Celsius or below, precipitation in all seasons, without the dry summer or dry winter of the s and w subtypes, and one to three months averaging 10 degrees Celsius or more and the coldest month below -38 degrees Celsius. Dfd AmeriFlux BADM CLIMATE_KOEPPEN value: Dfd. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Extremely cold subarctic climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging 0 degrees Celsius or below, a dry summer, the driest summer month having less than 40 mm of precipitation and less than a third of the wettest winter month, and the warmest month averaging at least 22 degrees Celsius. Dsa AmeriFlux BADM CLIMATE_KOEPPEN value: Dsa. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Mediterranean-influenced hot-summer humid continental climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging 0 degrees Celsius or below, a dry summer, the driest summer month having less than 40 mm of precipitation and less than a third of the wettest winter month, and the warmest month averaging below 22 degrees Celsius and at least four months averaging 10 degrees Celsius or more. Dsb AmeriFlux BADM CLIMATE_KOEPPEN value: Dsb. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Mediterranean-influenced warm-summer humid continental climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging 0 degrees Celsius or below, a dry summer, the driest summer month having less than 40 mm of precipitation and less than a third of the wettest winter month, and one to three months averaging 10 degrees Celsius or more and the coldest month at or above -38 degrees Celsius. Dsc AmeriFlux BADM CLIMATE_KOEPPEN value: Dsc. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Mediterranean-influenced subarctic climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging 0 degrees Celsius or below, a dry summer, the driest summer month having less than 40 mm of precipitation and less than a third of the wettest winter month, and one to three months averaging 10 degrees Celsius or more and the coldest month below -38 degrees Celsius. Dsd AmeriFlux BADM CLIMATE_KOEPPEN value: Dsd. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Mediterranean-influenced extremely cold subarctic climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging 0 degrees Celsius or below, a dry winter, the driest winter month having less than a tenth of the precipitation of the wettest summer month, and the warmest month averaging at least 22 degrees Celsius. Dwa AmeriFlux BADM CLIMATE_KOEPPEN value: Dwa. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Monsoon-influenced hot-summer humid continental climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging 0 degrees Celsius or below, a dry winter, the driest winter month having less than a tenth of the precipitation of the wettest summer month, and the warmest month averaging below 22 degrees Celsius and at least four months averaging 10 degrees Celsius or more. Dwb AmeriFlux BADM CLIMATE_KOEPPEN value: Dwb. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Monsoon-influenced warm-summer humid continental climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging 0 degrees Celsius or below, a dry winter, the driest winter month having less than a tenth of the precipitation of the wettest summer month, and one to three months averaging 10 degrees Celsius or more and the coldest month at or above -38 degrees Celsius. Dwc AmeriFlux BADM CLIMATE_KOEPPEN value: Dwc. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Monsoon-influenced subarctic climate NA Köppen climate class with the warmest month averaging above 10 degrees Celsius and coldest month averaging 0 degrees Celsius or below, a dry winter, the driest winter month having less than a tenth of the precipitation of the wettest summer month, and one to three months averaging 10 degrees Celsius or more and the coldest month below -38 degrees Celsius. Dwd AmeriFlux BADM CLIMATE_KOEPPEN value: Dwd. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Monsoon-influenced extremely cold subarctic climate NA Köppen climate class with the warmest month averaging 0 degrees Celsius or below. EF AmeriFlux BADM CLIMATE_KOEPPEN value: EF. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Ice cap climate NA Köppen climate class with the warmest month averaging above 0 degrees Celsius but below 10 degrees Celsius. AmeriFlux BADM CLIMATE_KOEPPEN value: ET. The code ET is not recorded as a synonym because it is a synonym of Evapotranspiration flux (BERVO:0001947). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Tundra climate NA Plant functional type of woody perennial plants with one main stem that grow to a height of several metres or more. AmeriFlux BADM VEGTYPE value: Tree. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Tree NA Plant functional type of trees that shed their entire canopy seasonally, commonly to avoid drought or cold. AmeriFlux BADM VEGTYPE value: Deciduous Tree. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Deciduous tree NA Plant functional type of trees that keep part of their canopy throughout the year rather than shedding it all seasonally. AmeriFlux BADM VEGTYPE value: Evergreen Tree. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Evergreen tree NA Plant functional type of woody perennial plants, usually with several stems from the base, that stay shorter than trees. AmeriFlux BADM VEGTYPE value: Shrub. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Shrub NA Plant functional type of grasses, sedges, rushes and other grass-like monocots of the order Poales. AmeriFlux BADM VEGTYPE value: Grass / Graminoid. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Graminoid NA Plant functional type of plants of the grass family, Poaceae. AmeriFlux BADM VEGTYPE value: Grass. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Grass NA Plant functional type of grasses that fix carbon by the C3 photosynthetic pathway alone. AmeriFlux BADM VEGTYPE value: C3 Grass. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 C3 grass NA Plant functional type of grasses with the C4 photosynthetic pathway, which concentrates carbon dioxide around Rubisco in bundle sheath cells. AmeriFlux BADM VEGTYPE value: C4 Grass. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 C4 grass NA Plant functional type of plants grown and harvested by people for food, fibre, fuel or forage. AmeriFlux BADM VEGTYPE value: Crop. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Crop NA Plant functional type of crops without persistent woody stems, such as cereals and vegetables. AmeriFlux BADM VEGTYPE value: Herbaceous Crop. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Herbaceous crop NA Plant functional type of perennial crops with woody stems, such as orchard trees and vines. AmeriFlux BADM VEGTYPE value: Woody Crop. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Woody crop NA Plant functional type of herbaceous flowering plants other than graminoids. AmeriFlux BADM VEGTYPE value: Herb / Forb. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Forb NA Plant functional type of forbs that complete their life cycle within one year. AmeriFlux BADM VEGTYPE value: Annual Herb / Forb. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Annual forb NA Plant functional type of forbs that live for more than two years. AmeriFlux BADM VEGTYPE value: Perennial Herb / Forb. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Perennial forb NA Plant functional type of plants with aerenchyma, air-filled tissue that carries gases between shoots and roots, typical of wetland plants. AmeriFlux BADM VEGTYPE value: Aerenchymatous Plants. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Aerenchymatous plant NA Plant functional type of climbing plants rooted in the ground that use other plants for support. vine AmeriFlux BADM VEGTYPE value: Liana / vine. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Liana NA Plant functional type of plants with fleshy water-storing tissues, such as cacti and euphorbs, many with crassulacean acid metabolism. AmeriFlux BADM VEGTYPE value: Succulant. AmeriFlux spells the value Succulant. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Succulent NA Plant functional type of plants without xylem and phloem, such as mosses, liverworts and hornworts. AmeriFlux BADM VEGTYPE value: Non-vascular. AmeriFlux's description also names lichens, which are not plants but are reported in this class. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Non-vascular plant NA Ground surface without plant cover, such as bare soil, rock or sand. bare ground AmeriFlux BADM VEGTYPE value: No vegetation. The VEGTYPE value Water maps to Water body (BERVO:8000724) and Understory to Understory. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Unvegetated surface NA Uppermost layer of vegetation in a stand, whose crowns form the main canopy. overstorey AmeriFlux BADM LAI_CANOPY_TYPE value: Overstory. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Overstory NA Plant material that is living, including material in a dormant or senescent state. AmeriFlux BADM VEG_STATUS and BIOMASS_STATUS value: Alive. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Live vegetation NA Plant material that is dead, whether still standing or fallen. AmeriFlux BADM VEG_STATUS value: Dead. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Dead vegetation NA Dead plant material that remains standing or attached to a plant, such as snags and dead foliage still on the stem. AmeriFlux BADM BIOMASS_STATUS value: Dead Standing. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Standing dead vegetation NA Live and dead plant material still attached to standing plants, excluding litter and debris that has fallen or become detached. AmeriFlux BADM BIOMASS_STATUS value: Mixed Standing. The BIOMASS_STATUS value All, all vegetation alive or dead, standing or fallen, needs no concept. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Standing vegetation NA Plant material that is green and holds chlorophyll. green plant material AmeriFlux BADM BIOMASS_GREENNESS value: Green. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Green vegetation NA Plant material that is no longer green, being senesced or dormant. non-green plant material AmeriFlux BADM BIOMASS_GREENNESS value: Non-green. The BIOMASS_GREENNESS value Mixed, partly green and partly not, needs no concept. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Non-green vegetation NA All parts of plants above the ground surface. aboveground biomass component AmeriFlux BADM BIOMASS_ORGAN value: Total aboveground. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Aboveground plant material NA All parts of plants below the ground surface. AmeriFlux BADM BIOMASS_ORGAN value: Total belowground. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Belowground plant material NA Lignified secondary xylem and associated tissues of the stems, branches and roots of woody plants. AmeriFlux BADM BIOMASS_ORGAN values: Wood, Wood aboveground. BIOMASS_ORGAN Wood aboveground is Wood together with Aboveground plant material. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Wood NA Woody material more than 10 cm in diameter, such as tree trunks. AmeriFlux BADM BIOMASS_ORGAN value: Coarse Wood. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Coarse wood NA Woody material from 2 to 10 cm in diameter, such as small stems and branches. AmeriFlux BADM BIOMASS_ORGAN value: Fine Wood. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Fine wood NA Root more than 2 mm in diameter. AmeriFlux BADM BIOMASS_ORGAN value: Coarse Roots. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Coarse root NA Root up to 2 mm in diameter, the part of a root system most active in water and nutrient uptake. AmeriFlux BADM BIOMASS_ORGAN value: Fine Roots. AmeriFlux's description reads roots > 2 mm diameter and rhizoids, which repeats the coarse-root threshold; fine roots are conventionally those up to 2 mm. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Fine root NA Underground plant organ that stores reserves, such as a tuber, rhizome, bulb or corm. AmeriFlux BADM BIOMASS_ORGAN value: Belowground storage. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Belowground storage organ NA Reproductive shoot of a flowering plant that bears stamens or carpels, before the fruit matures. AmeriFlux BADM BIOMASS_ORGAN value: Flowers. AmeriFlux includes inflorescences. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Flower NA Plant structure that encloses or supports seeds, such as a fruit or cone. AmeriFlux BADM BIOMASS_ORGAN value: Reproductive bodies. BIOMASS_ORGAN Foliage maps to Leaf, Seeds to Seed, Stems to Stem, Roots to Root and Total to Total. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Reproductive structure NA Stage in the life of a plant from germination to maturity, defined by age or size. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Values of the AmeriFlux BADM list LIFESTAGE. Plant life stage NA Plant life stage of a tree less than one year old. AmeriFlux BADM LIFESTAGE value: Germinant. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Germinant NA Plant life stage of a young plant grown from a germinated seed; for a tree, one shorter than breast height or less than 1 cm in diameter at breast height. AmeriFlux BADM LIFESTAGE value: Seedling. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Seedling NA Plant life stage of a young tree 1 to 5 cm in diameter at breast height. AmeriFlux BADM LIFESTAGE value: Sapling. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Sapling NA Plant life stage of an adult individual; for a tree, one more than 5 cm in diameter at breast height. AmeriFlux BADM LIFESTAGE value: Mature. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Mature plant NA Phenological event in which buds open as new leaves or shoots emerge. budburst AmeriFlux BADM PHEN_EVENT value: BudBreak. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Bud break NA Phenological event in which the cotyledons of a germinating seedling emerge above the soil. AmeriFlux BADM PHEN_EVENT value: Cotyledons. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Cotyledon emergence NA Phenological event in which the flowers of a plant open. anthesis AmeriFlux BADM PHEN_EVENT value: Flowering. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Flowering NA Phenological event in which leaves age, lose chlorophyll and remobilise nutrients before they are shed. AmeriFlux BADM PHEN_EVENT value: Leaf senescence. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Leaf senescence NA Phenological event in which leaves reach their full size. AmeriFlux BADM PHEN_EVENT value: Maximum leaf expansion. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Maximum leaf expansion NA Phenological event in which a deciduous canopy has shed all of its leaves. AmeriFlux BADM PHEN_EVENT value: Total leaf-off. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Leaf-off NA Direction on the horizon named by one of the 16 points of the compass, at intervals of 22.5 degrees clockwise from north. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Values of the AmeriFlux BADM lists ASPECT and DIR. Compass point NA Compass point at 0 degrees clockwise from north. AmeriFlux BADM ASPECT and DIR value: N. The code N is not recorded as a synonym because it is the symbol of Nitrogen (BERVO:8000167). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 North NA Compass point at 22.5 degrees clockwise from north. NNE AmeriFlux BADM ASPECT and DIR value: NNE. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 North-northeast NA Compass point at 45 degrees clockwise from north. NE AmeriFlux BADM ASPECT and DIR value: NE. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Northeast NA Compass point at 67.5 degrees clockwise from north. ENE AmeriFlux BADM ASPECT and DIR value: ENE. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 East-northeast NA Compass point at 90 degrees clockwise from north. E AmeriFlux BADM ASPECT and DIR value: E. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 East NA Compass point at 112.5 degrees clockwise from north. ESE AmeriFlux BADM ASPECT and DIR value: ESE. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 East-southeast NA Compass point at 135 degrees clockwise from north. AmeriFlux BADM ASPECT and DIR value: SE. The code SE is not recorded as a synonym because it is the symbol of Selenium (BERVO:8000616). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Southeast NA Compass point at 157.5 degrees clockwise from north. SSE AmeriFlux BADM ASPECT and DIR value: SSE. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 South-southeast NA Compass point at 180 degrees clockwise from north. AmeriFlux BADM ASPECT and DIR value: S. The code S is not recorded as a synonym because it is the symbol of Sulfur (BERVO:8000614). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 South NA Compass point at 202.5 degrees clockwise from north. SSW AmeriFlux BADM ASPECT and DIR value: SSW. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 South-southwest NA Compass point at 225 degrees clockwise from north. AmeriFlux BADM ASPECT and DIR value: SW. The code SW is not recorded as a synonym because it is the soil classification symbol of Well-graded sand (BERVO:8001048). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Southwest NA Compass point at 247.5 degrees clockwise from north. WSW AmeriFlux BADM ASPECT and DIR value: WSW. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 West-southwest NA Compass point at 270 degrees clockwise from north. W AmeriFlux BADM ASPECT and DIR value: W. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 West NA Compass point at 292.5 degrees clockwise from north. WNW AmeriFlux BADM ASPECT and DIR value: WNW. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 West-northwest NA Compass point at 315 degrees clockwise from north. NW AmeriFlux BADM ASPECT and DIR value: NW. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Northwest NA Compass point at 337.5 degrees clockwise from north. NNW AmeriFlux BADM ASPECT and DIR value: NNW. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 North-northwest NA Class of the shape or slope of the land surface at a site. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Values of the AmeriFlux BADM list TERRAIN. Terrain class NA Terrain class with no significant slope or relief. AmeriFlux BADM TERRAIN value: Flat. AmeriFlux BADM ASPECT value: FLAT. As an aspect it marks a site that faces no particular direction. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Flat terrain NA Terrain class of land that rises and falls in gentle swells. AmeriFlux BADM TERRAIN value: Undulated/Variable. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Undulating terrain NA Elongated low area of land between hills or mountains, with slopes on either side. AmeriFlux BADM TERRAIN value: Valley. Defined as the landform, with Terrain class as an additional parent, because the BADM TERRAIN value names the landform a site sits on. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Valley NA Highest part of a hill. AmeriFlux BADM TERRAIN value: Hilltop. Defined as the landform, with Terrain class as an additional parent, because the BADM TERRAIN value names the landform a site sits on. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Hilltop NA Terrain class of land sloping at less than 2 percent. AmeriFlux BADM TERRAIN value: Gentle slope (<2 %). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Gentle slope NA Terrain class of land sloping at 2 percent and up to 5 percent. AmeriFlux BADM TERRAIN value: Medium Slope (>2 %, <5%). AmeriFlux's strict bounds leave 2 and 5 percent in no class; BERVO closes them so the four slope classes have no gaps or overlaps. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Medium slope NA Terrain class of land sloping at more than 5 and up to 10 percent. AmeriFlux BADM TERRAIN value: Significant Slope (>5%, <10%). AmeriFlux's strict bounds leave 10 percent in no class; BERVO closes the upper bound so the four slope classes have no gaps or overlaps. 5 percent falls in Medium slope (BERVO:8001224). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Significant slope NA Terrain class of land sloping at more than 10 percent. AmeriFlux BADM TERRAIN value: Strong Slope (>10%). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Strong slope NA Discrete event that disrupts the structure of an ecosystem, community or population and changes the availability of resources or the physical environment. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Values of the AmeriFlux BADM list DIST_MGMT, with the DM_ lists below them, sit under Disturbance and Land management. Disturbance NA Prolonged deficiency of water, hydrological or climatic. AmeriFlux BADM DIST_MGMT and DM_EXT_WEATHER value: Drought. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Drought NA Weather event of unusual severity, such as a storm, flood, drought, heatwave or freeze. BERVO grouping for the values of the BADM list DM_EXT_WEATHER; no BADM value maps to it directly. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Extreme weather event NA Disturbance by an unusually hot or cold period, such as a heatwave or freeze. AmeriFlux BADM DIST_MGMT value: Temperature extreme. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Temperature extreme NA Disturbance by a major storm or by unusually high winds or precipitation, such as a hurricane, tornado, blizzard or hail. AmeriFlux BADM DIST_MGMT value: Storm or wind. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Storm or wind event NA Disturbance by drainage or by persistent or chronic flooding, excluding storm events and irrigation. AmeriFlux BADM DIST_MGMT value: Hydrologic event. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Hydrologic event NA Damage to plants or soil from pests, insects, pathogens, blight or other disease. pests and disease AmeriFlux BADM DIST_MGMT value: Pests and disease. The DM_INS_PATH value Pathogen maps to Plant disease (BERVO:8001243), the disturbance a pathogen causes; the organism or virus itself is Pathogen (BERVO:8000976). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Pest or disease disturbance NA Change in the land use or land cover of a site, such as invasion or woody or urban encroachment. AmeriFlux BADM DIST_MGMT value: Land cover change. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Land cover change NA Feeding on vegetation by mammals, managed or wild, by grazing or browsing. AmeriFlux BADM DIST_MGMT value: Grazing. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Grazing NA Extreme weather event in which water overflows onto land that is normally dry, after heavy precipitation, rapid snowmelt or a storm. AmeriFlux BADM DM_EXT_WEATHER value: Flood. Narrowed to the weather-driven sense of the DM_EXT_WEATHER list it comes from. Chronic flooding is Hydrologic event (BERVO:8001232), and deliberate flooding is Human-induced flooding (BERVO:8001294). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Flood NA Period of temperatures below freezing that damages vegetation. AmeriFlux BADM DM_EXT_WEATHER value: Freeze. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Freeze NA Period of unusually high temperatures lasting several days or more. AmeriFlux BADM DM_EXT_WEATHER value: Heatwave. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Heatwave NA Atmospheric disturbance with strong winds, often with heavy precipitation. AmeriFlux BADM DM_EXT_WEATHER value: Storm. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Storm NA Tropical cyclone with sustained winds of at least 33 m s-1. AmeriFlux BADM DM_EXT_WEATHER value: Hurricane. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Hurricane NA Violently rotating column of air in contact with the ground, extending from a thunderstorm. AmeriFlux BADM DM_EXT_WEATHER value: Tornado. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Tornado NA Damage to vegetation from feeding or boring by insects. AmeriFlux BADM DM_INS_PATH value: Insect. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Insect infestation NA Damage to vegetation from infection or other disease. AmeriFlux BADM DM_INS_PATH value: Disease. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Plant disease NA Increase in the cover of trees and shrubs in grassland or other open vegetation. AmeriFlux BADM DM_ENCROACH value: Woody encroachment. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Woody encroachment NA Spread of a species outside its native range into a site, where it establishes and changes the vegetation. AmeriFlux BADM DM_ENCROACH value: Invasive species. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Biological invasion NA Spread of buildings and other built structures onto a site or its surroundings. AmeriFlux BADM DM_ENCROACH value: Urban encroachment. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Urban encroachment NA Grazing by cattle. AmeriFlux BADM DM_GRAZE value: Cattle. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Cattle grazing NA Grazing by goats. AmeriFlux BADM DM_GRAZE value: Goat. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Goat grazing NA Grazing by sheep. AmeriFlux BADM DM_GRAZE value: Sheep. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Sheep grazing NA Fire that burns surface fuels beneath a forest canopy without killing most of the overstory trees. AmeriFlux BADM DM_FIRE values: Accidental human induced underburn, Nature induced underburn. Accidental and natural underburns are Underburn together with Accidental human-caused fire or Naturally caused fire. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Underburn NA Unplanned fire started by people by accident. AmeriFlux BADM DM_FIRE value: Accidental human induced burn. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Accidental human-caused fire NA Unplanned fire started by a natural cause such as lightning. AmeriFlux BADM DM_FIRE value: Nature induced burn. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Naturally caused fire NA Prescribed fire that burns surface fuels beneath a forest canopy. AmeriFlux BADM DM_FIRE value: Prescribed human induced underburn. The DM_FIRE value Prescribed human induced burn maps to Prescribed fire (BERVO:8000925). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Prescribed underburn NA Management of cropland or pasture, such as cultivation, harvest, irrigation, pesticide application, planting or liming. AmeriFlux BADM DIST_MGMT value: Agriculture. The DM_AGRICULTURE value Harvest maps to Harvest (BERVO:8000003). Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Agricultural management NA Management of forest, such as logging, plantation planting or herbicide application. AmeriFlux BADM DIST_MGMT value: Forestry. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Forest management NA Management of the water at a site by irrigation, drainage or deliberate flooding. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 The DM_WATER value Irrigation maps to Irrigation (BERVO:8000070). Water management NA Management of the crop residue left on a field after harvest, by removal, burning, mulching or incorporation. AmeriFlux BADM DM_AGRICULTURE value: Crop residue management. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Crop residue management NA Mechanical working of soil to prepare a seedbed, control weeds or incorporate residue. BERVO grouping for the values of the BADM list DM_TILL; no BADM value maps to it directly. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Tillage NA Tillage that inverts and loosens the whole plough layer, leaving little crop residue on the surface. AmeriFlux BADM DM_TILL value: Conventional. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Conventional tillage NA Tillage in which crops are planted on ridges rebuilt each season, leaving the soil between them undisturbed. AmeriFlux BADM DM_TILL value: Ridge till. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Ridge tillage NA Shallow disturbance of the soil surface or forest floor to expose mineral soil for seeding or planting. AmeriFlux BADM DM_TILL value: Scarification. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Scarification NA Tillage of narrow strips where seed is to be planted, leaving the soil and residue between strips undisturbed. AmeriFlux BADM DM_TILL value: Stripe till. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Strip tillage NA Tillage that leaves at least 30 percent of the soil surface covered by crop residue after planting. AmeriFlux BADM DM_TILL value: Conservation. Ridge tillage and Strip tillage sit beneath it, as in the USDA NRCS usage; AmeriFlux lists all four DM_TILL values side by side. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Conservation tillage NA Application of fertilizer to soil or plants to supply nutrients. BERVO grouping for Mineral fertilization and Organic fertilization, the BADM lists DM_FERT_M and DM_FERT_O; no BADM value maps to it directly. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Fertilization NA Application of inorganic fertilizer or lime. BERVO grouping for the values of the BADM list DM_FERT_M; no BADM value maps to it directly. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Mineral fertilization NA Application of inorganic fertilizer that supplies nitrogen. AmeriFlux BADM DM_FERT_M value: N. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Nitrogen fertilization NA Application of inorganic fertilizer that supplies phosphorus. AmeriFlux BADM DM_FERT_M value: P. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Phosphorus fertilization NA Application of inorganic fertilizer that supplies potassium. AmeriFlux BADM DM_FERT_M value: K. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Potassium fertilization NA Application of ground limestone or another calcium or magnesium compound to raise soil pH. AmeriFlux BADM DM_FERT_M value: Lime. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Liming NA Application of manure, compost or another organic material to supply nutrients. BERVO grouping for the values of the BADM list DM_FERT_O; no BADM value maps to it directly. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Organic fertilization NA Application of animal manure as a liquid or slurry. AmeriFlux BADM DM_FERT_O value: Liquid manure. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Liquid manure application NA Application of animal manure as a solid. AmeriFlux BADM DM_FERT_O value: Solid manure. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Solid manure application NA Application of compost, decomposed organic material. AmeriFlux BADM DM_FERT_O value: Compost. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Compost application NA Application of manure from poultry. AmeriFlux BADM DM_FERT_O value: Poultry. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Poultry manure application NA Application of a substance that kills or controls pests, weeds or pathogens. BERVO grouping for the values of the BADM list DM_PESTICIDE; no BADM value maps to it directly. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Pesticide application NA Application of a substance that kills bacteria. AmeriFlux BADM DM_PESTICIDE value: Bactericide. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Bactericide application NA Application of a substance that kills or inhibits fungi. AmeriFlux BADM DM_PESTICIDE value: Fungicide. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Fungicide application NA Application of a substance that kills or controls unwanted plants. AmeriFlux BADM DM_PESTICIDE value: Herbicide. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Herbicide application NA Application of a substance that kills or controls insects. AmeriFlux BADM DM_PESTICIDE value: Insecticide. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Insecticide application NA Setting live plants into the ground. BERVO grouping for the planting values of the BADM list DM_PLANTING; no BADM value maps to it directly. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Planting NA Planting of live trees. AmeriFlux BADM DM_PLANTING value: Planting live trees. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Tree planting NA Planting of live shrubs. AmeriFlux BADM DM_PLANTING value: Planting live shrubs. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Shrub planting NA Planting of live crop plants. AmeriFlux BADM DM_PLANTING value: Planting live crops. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Crop planting NA Planting of live grasses. AmeriFlux BADM DM_PLANTING value: Planting live grasses. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Grass planting NA Placing seeds in or on the ground. BERVO grouping for the sowing values of the BADM list DM_PLANTING; no BADM value maps to it directly. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Sowing NA Sowing of tree seeds. AmeriFlux BADM DM_PLANTING value: Sowing tree seeds. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Tree seed sowing NA Sowing of shrub seeds. AmeriFlux BADM DM_PLANTING value: Sowing shrub trees. AmeriFlux writes the value as Sowing shrub trees. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Shrub seed sowing NA Sowing of crop seeds. AmeriFlux BADM DM_PLANTING value: Sowing crop seeds. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Crop seed sowing NA Sowing of grass seeds. AmeriFlux BADM DM_PLANTING value: Sowing grass seeds. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Grass seed sowing NA Felling and removal of all or nearly all the trees from an area of forest. AmeriFlux BADM DM_FORESTRY value: Clearcutting. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Clearcutting NA Removal of fallen trees, branches and other woody debris from a forest floor. AmeriFlux BADM DM_FORESTRY value: Fallen wood removal. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Fallen wood removal NA Removal of some trees from a stand, or of branches from trees, to change growth or stand structure. AmeriFlux BADM DM_FORESTRY value: Thinning/pruning. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Thinning or pruning NA Removal of excess water from soil by ditches, tile drains or other constructed means. AmeriFlux BADM DM_WATER value: Drainage. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Artificial drainage NA Deliberate flooding of land, as in rice paddies or wetland management. AmeriFlux BADM DM_WATER value: Human induced flooding. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Human-induced flooding NA Qualifier for a site where no disturbance or management has occurred in the period described. AmeriFlux BADM DIST_MGMT and DM_GENERAL value: Undisturbed. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 5 Undisturbed NA A categorical classification system for organizing variables that represent the movement of chemical elements and compounds through ecosystem compartments. This data type groups parameters that quantify carbon, nitrogen, phosphorus, and other biogeochemical fluxes between atmosphere, biosphere, soil, and water reservoirs in earth system models. EcosimBGCFluxType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) EcosimBGCFluxType.txt Biogeochemical flux variable NA A categorical classification system for organizing variables that control plant development, biomass accumulation, and physiological processes in vegetation models. This data type groups parameters such as growth rates, allocation coefficients, and phenological thresholds that determine plant responses to environmental conditions in terrestrial ecosystems. GrosubPars Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) GrosubPars.txt Plant growth parameters NA A categorical classification system for organizing logical and boolean variables that control model behavior, activate processes, or indicate system states. This data type groups parameters that serve as switches, indicators, or conditional triggers for various computational pathways and decision-making processes in earth system models. FlagDataType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) FlagDataType.txt Flag data type NA A categorical classification system for organizing parameters that control the behavior and transport of chemical tracers used for tracking substance movement through environmental systems. This data type groups variables such as diffusion coefficients, decay rates, and partition coefficients that govern tracer fate and transport in biogeochemical models. ChemTracerParsMod ChemTracerParsMod.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Chemical tracer parameters NA A categorical classification system for organizing variables concerning the impact of fire on an environment. Fire variable NA A categorical classification system for organizing variables that represent time-dependent rates of plant processes such as photosynthesis, respiration, and growth. This data type groups parameters that quantify temporal changes in plant physiological functions and biomass dynamics in vegetation models. PlantDataRateType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) PlantDataRateType.txt Plant rate variable NA A categorical classification system for organizing variables related to artificial water application in agricultural and managed ecosystems. This data type groups parameters such as irrigation rates, timing schedules, water sources, and efficiency factors that control water management practices in terrestrial models. IrrigationDataType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) IrrigationDataType.txt Irrigation variable NA A categorical classification system for organizing variables that describe the three-dimensional structure, composition, and functioning of vegetation canopies. This data type groups parameters such as leaf area index, canopy height, light interception, and architectural properties that control ecosystem energy and mass exchange processes. CanopyDataType CanopyDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Canopy variable NA A categorical classification system for organizing variables that characterize the physical properties and processes occurring at the interface between terrestrial ecosystems and the atmosphere. This data type groups parameters such as surface roughness, albedo, temperature, and moisture that control energy and water exchange in earth system models. LandSurfDataType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) LandSurfDataType.txt Land surface variable NA A categorical classification system for organizing variables that represent inherent physiological, morphological, and phenological characteristics of plant species or functional groups. This data type groups parameters such as specific leaf area, wood density, maximum photosynthetic rate, and root depth that determine plant ecological strategies and ecosystem functioning. PlantTraitDataType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) PlantTraitDataType.txt Plant trait variable NA A categorical classification system for organizing variables that govern the movement of chemical substances through environmental media via advection, diffusion, and dispersion processes. This data type groups parameters such as transport coefficients, velocity fields, and concentration gradients that control chemical fate and distribution in earth system models. ChemTranspDataType ChemTranspDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Chemical transport variable NA A categorical classification system for organizing variables that represent biogeochemical processes and transformations occurring within soil systems. This data type groups parameters such as decomposition rates, nutrient mineralization, microbial activity, and chemical reactions that control soil carbon and nutrient cycling in terrestrial ecosystems. SoilBGCDataType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilBGCDataType.txt Soil biogeochemistry variable NA A categorical classification system for organizing variables that define the spatial discretization and computational mesh structure used in numerical models. This data type groups parameters such as grid spacing, coordinate systems, boundary conditions, and connectivity information that determine the spatial framework for earth system simulations. GridDataType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) GridDataType.txt Grid variable NA A categorical classification system for organizing variables that represent microbial community structure, activity, and ecological functions in environmental systems. This data type groups parameters such as biomass, growth rates, metabolic pathways, and community composition that control microbial contributions to biogeochemical cycling. MicrobialDataType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) MicrobialDataType.txt Microbial variable NA A categorical classification system for organizing variables related to human interventions and management practices that affect plant growth and ecosystem functioning. This data type groups parameters such as fertilization schedules, harvesting practices, pruning regimes, and pest control measures used in agricultural and forestry applications. PlantMgmtDataType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) PlantMgmtDataType.txt Plant management variable NA A categorical classification system for organizing variables that characterize the structure, function, and dynamics of plant root systems in terrestrial ecosystems. This data type groups parameters such as root biomass, depth distribution, architecture, uptake rates, and exudation processes that control belowground plant-soil interactions. RootDataType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) RootDataType.txt Root variable NA A categorical classification system for organizing variables that describe the accumulation, composition, and decomposition of dead organic matter on soil surfaces. This data type groups parameters such as litter mass, chemical composition, decomposition rates, and layer structure that control organic matter cycling in forest floor environments. SurfLitterDataType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SurfLitterDataType.txt Surface litter variable NA A categorical classification system for organizing parameters that control microbial processes involved in nitrogen transformations within soil and aquatic systems. This data type groups variables such as nitrification rates, denitrification coefficients, and microbial growth parameters that regulate nitrogen cycling in biogeochemical models. NitroPars Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) NitroPars.txt Microbial parameters NA A categorical classification system for organizing variables that characterize the properties and behavior of particulate matter in aquatic and terrestrial systems. This data type groups parameters such as particle size distribution, settling velocities, erosion rates, and chemical composition that control sediment transport and deposition processes. SedimentDataType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SedimentDataType.txt Sediment variable NA A categorical classification system for organizing universal physical and chemical constants that remain fixed across different environmental conditions and model applications. This concept groups fundamental parameters such as gas constants, atomic masses, and thermodynamic properties that provide reference values for biogeochemical calculations in earth system models. EcoSimConst Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) EcoSimConst.txt Constant NA A categorical classification system for organizing variables that represent atmospheric conditions and meteorological drivers that force terrestrial and aquatic ecosystem processes. This data type groups parameters such as temperature, precipitation, humidity, wind speed, and solar radiation that control environmental conditions in earth system models. ClimForcDataType ClimForcDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Climate force variable NA A categorical classification system for organizing variables that characterize the integrated properties and processes of surface-soil systems including their physical, chemical, and biological attributes. This data type groups parameters that describe soil-atmosphere interactions, surface energy balance, and coupled surface-subsurface processes in terrestrial ecosystems. SurfSoilDataType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SurfSoilDataType.txt Soil surface variable NA A categorical classification system for organizing parameters that control microbially-mediated biogeochemical processes and transformations in environmental systems. This data type groups variables such as enzyme kinetics, metabolic pathways, growth efficiencies, and substrate preferences that govern microbial contributions to element cycling. MicBGCPars Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) MicBGCPars.txt Microbial biogeochemistry parameters NA A categorical classification system for organizing variables that describe thermal properties and heat transfer processes within soil systems. This data type groups parameters such as soil temperature, thermal conductivity, heat capacity, and thermal diffusivity that control soil energy balance and temperature dynamics in terrestrial ecosystems. SoilHeatDataType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilHeatDataType.txt Soil heat variable NA A categorical classification system for organizing variables that describe the fundamental chemical, physical, and biological characteristics of soil systems. This data type groups parameters such as pH, cation exchange capacity, organic matter content, and mineral composition that determine soil fertility and ecosystem functioning. SoilPropertyDataType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilPropertyDataType.txt Soil variable NA A categorical classification system for organizing variables that characterize snow accumulation, metamorphism, and melting processes in cold climate regions. This data type groups parameters such as snow depth, density, albedo, thermal properties, and water equivalent that control snowpack dynamics and hydrological processes. SnowDataType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SnowDataType.txt Snow variable NA A categorical classification system for organizing variables related to nutrient application and fertilizer management in agricultural and managed ecosystems. This data type groups parameters such as application rates, timing, nutrient composition, and release characteristics that control artificial nutrient inputs and plant nutrition in terrestrial systems. FertilizerDataType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) FertilizerDataType.txt Fertilizer variable NA A categorical classification system for organizing variables that describe the interception, absorption, transmission, and reflection of electromagnetic radiation within vegetation canopies. This data type groups parameters such as photosynthetically active radiation, near-infrared radiation, light extinction coefficients, and albedo that control canopy energy balance and photosynthesis. CanopyRadDataType CanopyRadDataType.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Canopy radiation variable NA A categorical classification system for organizing variables that characterize the quantity, quality, and dynamics of organic matter in soil systems. This data type groups parameters such as carbon content, decomposition rates, chemical composition, and stabilization mechanisms that control soil organic matter cycling and carbon sequestration. SOMDataType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SOMDataType.txt Soil organic matter variable NA A categorical classification system for organizing variables that describe the chemical composition and reactions of dissolved substances in aqueous solutions within environmental systems. This data type groups parameters such as ion concentrations, pH, chemical equilibria, and reaction kinetics that control aqueous geochemical processes in soil and water systems. AqueChemDatatype AqueChemDatatype.txt Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Water variable NA A categorical classification system for organizing variables that characterize the coupled dynamics of water movement and storage within soil systems. This data type groups parameters such as water content, hydraulic conductivity, water potential, infiltration rates, and drainage processes that control soil hydrology and water availability for plants and ecosystems. SoilWaterDataType Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) SoilWaterDataType.txt Soil and water variable NA A categorical classification system for organizing thermodynamic and kinetic constants that govern specific chemical transformations and equilibrium processes in environmental systems. This concept groups fundamental parameters such as equilibrium constants, activation energies, and stoichiometric coefficients that control the rates and outcomes of particular chemical reactions in biogeochemical models. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Constants for specific chemical reactions NA A categorical classification system for organizing thermodynamic and kinetic constants that govern specific biochemical transformations and metabolic processes in living systems. This concept groups fundamental parameters such as enzyme kinetic constants, metabolic coefficients, and pathway-specific rates that control biological chemical reactions in ecosystem and biogeochemical models. Definition source - Claude Sonnet 4 through GitHub Copilot in VSCode (Sep 26 2025) Constants for specific biochemical reactions NA A categorical classification system for organizing all variables concerning plants. Plant variable NA Grouping of the kinds of heat told apart by what a transfer does to a body, whether it changes its temperature or drives a change of phase. This axis cross-cuts Heat by transfer mechanism: every heat flux has both a thermodynamic form and a transfer mechanism, so a term beneath this grouping and a term beneath that one are not alternatives and a variable may name one of each. Definition source - Claude Opus 5 through Claude Code (Sep 22 2026), review of #90 Heat by thermodynamic form NA Grouping of the kinds of heat told apart by how the thermal energy moves, whether by molecular contact through a medium, by the bulk movement of a fluid, or as electromagnetic radiation. This axis cross-cuts Heat by thermodynamic form: every heat flux has both a transfer mechanism and a thermodynamic form, so a term beneath this grouping and a term beneath that one are not alternatives and a variable may name one of each. Definition source - Claude Opus 5 through Claude Code (Sep 22 2026), review of #90 Heat by transfer mechanism NA Grouping class for observed variables that describe the near-surface atmosphere and the radiation that reaches or leaves a land or water surface, as reported by weather stations, radiometers, and flux towers. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 Meteorological variable NA Grouping class for observed fluxes of energy, water, carbon, momentum, and other substances between a land or water surface and the atmosphere or water column, or within an ecosystem. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66 Surface flux variable NA Grouping class for observed variables that describe organisms and the communities they form, such as biomass, stand structure, cell and colony densities, the abundance of the genes they carry, counts, diversity indices, body sizes, and vegetation type. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 3 Ecology variable NA Grouping class for observed variables that describe surface water and groundwater: their quantity, level, movement, and use; the physical properties of water bodies, such as clarity, light attenuation, and density; and the state of the wells and structures that hold or control water. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 4 Hydrology variable NA Grouping class for observed variables that describe bedrock, geologic materials, and the deposits over them, such as rock type, borehole lithology, natural gamma radiation, and the thickness of alluvium. Definition source - Claude Opus 5.5 through Claude Code (Sep 24 2026), ODM2 variable name alignment for issue #66, slice 5 Geology variable NA Grouping class for observed variables that describe the quality of water for its uses and for aquatic life: its capacity to neutralize acid or base, oxygen demand, hardness, solids, the concentrations of dissolved solutes and gases, optical and sensory properties, mineral saturation state, trophic state, and gross radioactivity. Definition source - Claude Opus 5.5 through Claude Code (Sep 25 2026), ODM2 variable name alignment for issue #66, slice 6 Water quality variable NA Grouping class for variables that describe wastewater systems and the wastewater in them: flow and load, the population and area served, treatment plant operation such as retention times and removal efficiencies, and the condition and origin of wastewater samples. Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Wastewater variable NA Grouping class for kinds of wastewater distinguished by where they come from, such as human excreta or industrial processes. This axis cross-cuts Wastewater by treatment stage: every wastewater has both an origin and a treatment stage, so a term beneath this grouping and a term beneath that one are not alternatives, and they must not be declared disjoint. Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Wastewater by origin NA Grouping class for kinds of wastewater distinguished by how far along treatment they are, from untreated influent to treated effluent. This axis cross-cuts Wastewater by origin: every wastewater has both an origin and a treatment stage, so a term beneath this grouping and a term beneath that one are not alternatives, and they must not be declared disjoint. Definition source - Claude Opus 5.5 through Claude Code (Oct 7 2026), wastewater terms for issue #143 Wastewater by treatment stage NA Grouping class for variables that report the stable isotope composition of a material as an isotope delta against a reference standard. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), ESS-DIVE survey alignment for issue #171 Stable isotope variable NA Grouping class for the amounts of gases and other constituents in the atmosphere, whether measured at a site or prescribed as a model forcing. Atmospheric gas concentration (BERVO:0001391), the parent of the EcoSIM forcing concentrations, sits here as an additional parent and keeps Climate force variable as its Category. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 1 Atmospheric composition variable NA Grouping class for quantities derived from reflectances or radiances in two or more spectral bands, most of them dimensionless combinations of the bands, used to estimate the amount, structure or physiological state of vegetation. Definition source - Claude Opus 5.5 through Claude Code (Oct 15 2026), AmeriFlux alignment for issue #178, slice 2 Red edge position (BERVO:0002309), a wavelength derived from the shape of the reflectance spectrum across the red edge, is the one member with a unit. Spectral vegetation index NA