| Key | CTMCategory |
| 0 | IJ-AVG-$ | CTMCategory(offset=0, name=IJ-AVG-$, description=Tracer concentration) |
| 1 | IJ-24H-$ | CTMCategory(offset=0, name=IJ-24H-$, description=24-hr avg tracer conc.) |
| 2 | INST-MAP | CTMCategory(offset=0, name=INST-MAP, description=Instantaneous tracer) |
| 3 | IJ-MAX-$ | CTMCategory(offset=0, name=IJ-MAX-$, description=Surface peak concentration) |
| 4 | ANTHSRCE | CTMCategory(offset=1000, name=ANTHSRCE, description=Anthropogenic emissions) |
| 5 | BIOFSRCE | CTMCategory(offset=1000, name=BIOFSRCE, description=Biofuel emissions) |
| 6 | NO-AC-$ | CTMCategory(offset=1000, name=NO-AC-$, description=Aircraft NO) |
| 7 | NO-AN-$ | CTMCategory(offset=1000, name=NO-AN-$, description=Anthropogenic NO) |
| 8 | NO-BIOB | CTMCategory(offset=1000, name=NO-BIOB, description=Biomass NO) |
| 9 | NO-BIOF | CTMCategory(offset=1000, name=NO-BIOF, description=Biofuel NO) |
| 10 | NO-LI-$ | CTMCategory(offset=1000, name=NO-LI-$, description=Lightning NO) |
| 11 | NO-SOIL | CTMCategory(offset=1000, name=NO-SOIL, description=Soil NO) |
| 12 | NO-FERT | CTMCategory(offset=1000, name=NO-FERT, description=Fertilizer NO) |
| 13 | NO-STRT | CTMCategory(offset=1000, name=NO-STRT, description=Stratopsheric NO) |
| 14 | INST_COL | CTMCategory(offset=2000, name=INST_COL, description=Instantaneous columns) |
| 15 | CV-FLX-$ | CTMCategory(offset=3000, name=CV-FLX-$, description=Convective mass flux) |
| 16 | TURBMC-$ | CTMCategory(offset=3000, name=TURBMC-$, description=PBL mixing mass flux) |
| 17 | EW-FLX-$ | CTMCategory(offset=3000, name=EW-FLX-$, description=E/W transport flux) |
| 18 | NS-FLX-$ | CTMCategory(offset=3000, name=NS-FLX-$, description=N/S transport flux) |
| 19 | UP-FLX-$ | CTMCategory(offset=3000, name=UP-FLX-$, description=Up/down transport flux) |
| 20 | STRT-FLX | CTMCategory(offset=3000, name=STRT-FLX, description=Flux from stratosphere) |
| 21 | RN--SRCE | CTMCategory(offset=3000, name=RN--SRCE, description=Rn-Pb-Be source) |
| 22 | RN-DECAY | CTMCategory(offset=3000, name=RN-DECAY, description=Rn-Pb-Be loss) |
| 23 | WETDCV-$ | CTMCategory(offset=3000, name=WETDCV-$, description=Conv wet scavenging) |
| 24 | WETDLS-$ | CTMCategory(offset=3000, name=WETDLS-$, description=Wet deposition) |
| 25 | MC-FRC-$ | CTMCategory(offset=3000, name=MC-FRC-$, description=Moist conv fraction) |
| 26 | DMS-BIOG | CTMCategory(offset=4000, name=DMS-BIOG, description=Biogenic DMS) |
| 27 | DUSTSRCE | CTMCategory(offset=4000, name=DUSTSRCE, description=Dust emission) |
| 28 | NVOCSRCE | CTMCategory(offset=4000, name=NVOCSRCE, description=NVOC emissions) |
| 29 | SALTSRCE | CTMCategory(offset=4000, name=SALTSRCE, description=Seasalt emission) |
| 30 | SO2-AC-$ | CTMCategory(offset=4000, name=SO2-AC-$, description=Aircraft SO2 emissions) |
| 31 | SO2-AN-$ | CTMCategory(offset=4000, name=SO2-AN-$, description=Anthro SO2 emissions) |
| 32 | SO2-BIOB | CTMCategory(offset=4000, name=SO2-BIOB, description=Biomass SO2 emissions) |
| 33 | SO2-BIOF | CTMCategory(offset=4000, name=SO2-BIOF, description=Biofuel SO2 emissions) |
| 34 | SO2-EV-$ | CTMCategory(offset=4000, name=SO2-EV-$, description=Erup. Volcano SO2) |
| 35 | SO2-NV-$ | CTMCategory(offset=4000, name=SO2-NV-$, description=Non-Erup. Volcano SO2) |
| 36 | SO2-SHIP | CTMCategory(offset=4000, name=SO2-SHIP, description=SO2 from ship exhaust) |
| 37 | SO4-AN-$ | CTMCategory(offset=4000, name=SO4-AN-$, description=Anthro SO4 emissions) |
| 38 | SO4-BIOF | CTMCategory(offset=4000, name=SO4-BIOF, description=Biofuel SO4 emissions) |
| 39 | NH3-ANTH | CTMCategory(offset=4000, name=NH3-ANTH, description=Anthro NH3 emissions) |
| 40 | NH3-NATU | CTMCategory(offset=4000, name=NH3-NATU, description=Natural NH3 emissions) |
| 41 | NH3-BIOB | CTMCategory(offset=4000, name=NH3-BIOB, description=Biomass NH3 emissions) |
| 42 | NH3-BIOF | CTMCategory(offset=4000, name=NH3-BIOF, description=Biofuel NH3 emissions) |
| 43 | TROPO-AV | CTMCategory(offset=4000, name=TROPO-AV, description=Trop avg'd tracer) |
| 44 | TCMASS-$ | CTMCategory(offset=4000, name=TCMASS-$, description=Tracer mass (kg)) |
| 45 | PEDGE-$ | CTMCategory(offset=10000, name=PEDGE-$, description=Pressure at level edges) |
| 46 | PS-PTOP | CTMCategory(offset=10000, name=PS-PTOP, description=Pressure level edges) |
| 47 | DAO-FLDS | CTMCategory(offset=11000, name=DAO-FLDS, description=GMAO 2-D met fields) |
| 48 | DAO-3D-$ | CTMCategory(offset=12000, name=DAO-3D-$, description=GMAO 3-D met fields) |
| 49 | JV-MAP-$ | CTMCategory(offset=13000, name=JV-MAP-$, description=Photolysis rates) |
| 50 | OD-MAP-$ | CTMCategory(offset=14000, name=OD-MAP-$, description=Optical Depths) |
| ... | ... | ... |
| 137 | IJ-PSC-$ | CTMCategory(offset=55000, name=IJ-PSC-$, description=PSC restart file) |
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],
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