Note
Go to the end to download the full example code.
Grid
import numpy as np
from opendrift.readers import reader_netCDF_CF_generic
from opendrift.models.oceandrift import OceanDrift
o = OceanDrift(loglevel=20) # Set loglevel to 0 for debug information
# Norkyst
reader_norkyst = reader_netCDF_CF_generic.Reader(o.test_data_folder() + '16Nov2015_NorKyst_z_surface/norkyst800_subset_16Nov2015.nc')
o.add_reader(reader_norkyst)
#o.set_config('environment:fallback:land_binary_mask', 0)
o.set_config('drift:vertical_mixing', False)
12:56:46 INFO opendrift.models.basemodel:515: OpenDriftSimulation initialised (version 1.11.13 / v1.11.13-99-gd2132d3)
12:56:46 INFO opendrift.readers.reader_netCDF_CF_generic:102: Opening dataset: /root/project/tests/test_data/16Nov2015_NorKyst_z_surface/norkyst800_subset_16Nov2015.nc
12:56:47 INFO opendrift.readers.reader_netCDF_CF_generic:325: Detected dimensions: {'x': 'X', 'y': 'Y', 'z': 'depth', 'time': 'time'}
Seeding some particles
lons = np.linspace(3.5, 5.0, 100)
lats = np.linspace(60, 61, 100)
lons, lats = np.meshgrid(lons, lats)
lons = lons.ravel()
lats = lats.ravel()
o.seed_elements(lons, lats, radius=0, number=10000,
time=reader_norkyst.start_time)
12:56:47 INFO opendrift.models.basemodel.environment:218: Adding a dynamical landmask with max. priority based on assumed maximum speed of 2.0 m/s. Adding a customised landmask may be faster...
12:56:51 INFO opendrift.models.basemodel.environment:245: Fallback values will be used for the following variables which have no readers:
12:56:51 INFO opendrift.models.basemodel.environment:248: sea_surface_height: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: x_wind: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: y_wind: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: upward_sea_water_velocity: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: ocean_vertical_diffusivity: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: sea_surface_wave_significant_height: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: sea_surface_wave_stokes_drift_x_velocity: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: sea_surface_wave_stokes_drift_y_velocity: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: sea_surface_wave_period_at_variance_spectral_density_maximum: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: sea_surface_swell_wave_to_direction: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: sea_surface_swell_wave_peak_period_from_variance_spectral_density: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: sea_surface_swell_wave_significant_height: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: sea_surface_wind_wave_to_direction: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: sea_surface_wind_wave_mean_period: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: sea_surface_wind_wave_significant_height: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: surface_downward_x_stress: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: surface_downward_y_stress: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: turbulent_kinetic_energy: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: turbulent_generic_length_scale: 0.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: ocean_mixed_layer_thickness: 50.000000
12:56:51 INFO opendrift.models.basemodel.environment:248: sea_floor_depth_below_sea_level: 10000.000000
Running model
o.run(steps=60*2, time_step=1800, time_step_output=1800)
12:56:52 INFO opendrift.models.basemodel:936: Using existing reader for land_binary_mask
12:56:54 INFO opendrift.models.basemodel:949: Moving 469 out of 10000 points from land to water
12:56:54 INFO opendrift.models.basemodel:2038: 2015-11-16 00:00:00 - step 1 of 120 - 10000 active elements (0 deactivated)
/root/project/opendrift/readers/interpolation/interpolators.py:17: RuntimeWarning: overflow encountered in cast
data[mask] = np.finfo(np.float64).min
12:56:54 INFO opendrift.models.basemodel:2038: 2015-11-16 00:30:00 - step 2 of 120 - 10000 active elements (0 deactivated)
12:56:55 INFO opendrift.models.basemodel:2038: 2015-11-16 01:00:00 - step 3 of 120 - 9751 active elements (249 deactivated)
12:56:55 INFO opendrift.models.basemodel:2038: 2015-11-16 01:30:00 - step 4 of 120 - 9591 active elements (409 deactivated)
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12:57:08 INFO opendrift.models.basemodel:2038: 2015-11-18 11:30:00 - step 120 of 120 - 7658 active elements (2342 deactivated)
Print and plot results
print(o)
o.animation(fast=False, corners=[3.5, 5.5, 59.9, 61.2])
===========================
--------------------
Reader performance:
--------------------
/root/project/tests/test_data/16Nov2015_NorKyst_z_surface/norkyst800_subset_16Nov2015.nc
0:00:02.8 total
0:00:00.0 preparing
0:00:00.7 reading
0:00:00.4 interpolation
0:00:00.0 interpolation_time
0:00:02.0 rotating vectors
0:00:00.0 masking
--------------------
global_landmask
0:00:01.9 total
0:00:00.0 preparing
0:00:01.9 reading
0:00:00.0 masking
--------------------
Performance:
21.7 total time
4.8 configuration
2.3 preparing main loop
1.7 moving elements to ocean
14.5 main loop
0.6 updating elements
0.0 cleaning up
--------------------
===========================
Model: OceanDrift (OpenDrift version 1.11.13)
7649 active Lagrangian3DArray particles (2351 deactivated, 0 scheduled)
-------------------
Environment variables:
-----
x_sea_water_velocity
y_sea_water_velocity
1) /root/project/tests/test_data/16Nov2015_NorKyst_z_surface/norkyst800_subset_16Nov2015.nc
-----
land_binary_mask
1) global_landmask
-----
Readers not added for the following variables:
ocean_mixed_layer_thickness
ocean_vertical_diffusivity
sea_floor_depth_below_sea_level
sea_surface_height
sea_surface_swell_wave_peak_period_from_variance_spectral_density
sea_surface_swell_wave_significant_height
sea_surface_swell_wave_to_direction
sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment
sea_surface_wave_period_at_variance_spectral_density_maximum
sea_surface_wave_significant_height
sea_surface_wave_stokes_drift_x_velocity
sea_surface_wave_stokes_drift_y_velocity
sea_surface_wind_wave_mean_period
sea_surface_wind_wave_significant_height
sea_surface_wind_wave_to_direction
surface_downward_x_stress
surface_downward_y_stress
turbulent_generic_length_scale
turbulent_kinetic_energy
upward_sea_water_velocity
x_wind
y_wind
Discarded readers:
Time:
Start: 2015-11-16 00:00:00 UTC
Present: 2015-11-18 12:00:00 UTC
Calculation steps: 120 * 0:30:00 - total time: 2 days, 12:00:00
Output steps: 121 * 0:30:00
===========================
/opt/conda/envs/opendrift/lib/python3.11/site-packages/cartopy/mpl/geoaxes.py:1692: UserWarning: No data for colormapping provided via 'c'. Parameters 'cmap' will be ignored
result = super().scatter(*args, **kwargs)
12:57:30 INFO opendrift.models.basemodel:4613: Saving animation to /root/project/docs/source/gallery/animations/example_grid_0.gif...
13:04:05 INFO opendrift.models.basemodel:3037: Time to make animation: 0:06:56.094119
Total running time of the script: (7 minutes 23.356 seconds)