Generic example

from datetime import datetime, timedelta
from opendrift.readers import reader_netCDF_CF_generic
from opendrift.models.openoil import OpenOil

o = OpenOil(loglevel=20)  # Set loglevel to 0 for debug information

# Arome atmospheric model
reader_arome = reader_netCDF_CF_generic.Reader(o.test_data_folder() + '16Nov2015_NorKyst_z_surface/arome_subset_16Nov2015.nc')
# Norkyst ocean model
reader_norkyst = reader_netCDF_CF_generic.Reader(o.test_data_folder() + '16Nov2015_NorKyst_z_surface/norkyst800_subset_16Nov2015.nc')

# Uncomment to use live data from thredds
#reader_arome = reader_netCDF_CF_generic.Reader('https://thredds.met.no/thredds/dodsC/mepslatest/meps_lagged_6_h_latest_2_5km_latest.nc')
#reader_norkyst = reader_netCDF_CF_generic.Reader('https://thredds.met.no/thredds/dodsC/sea/norkyst800m/1h/aggregate_be')

o.add_reader([reader_norkyst, reader_arome])
21:48:59 INFO    opendrift.models.basemodel:529: OpenDriftSimulation initialised (version 1.11.1 / v1.11.1-74-g4504ea0)
21:48:59 INFO    opendrift.readers.reader_netCDF_CF_generic:97: Opening dataset: /root/project/tests/test_data/16Nov2015_NorKyst_z_surface/arome_subset_16Nov2015.nc
21:49:00 INFO    opendrift.readers.reader_netCDF_CF_generic:309: Detected dimensions: {'time': 'time', 'x': 'x', 'y': 'y'}
21:49:00 INFO    opendrift.readers.reader_netCDF_CF_generic:97: Opening dataset: /root/project/tests/test_data/16Nov2015_NorKyst_z_surface/norkyst800_subset_16Nov2015.nc
21:49:00 INFO    opendrift.readers.reader_netCDF_CF_generic:309: Detected dimensions: {'x': 'X', 'y': 'Y', 'z': 'depth', 'time': 'time'}

Seeding some particles time = datetime(2015, 9, 22, 6, 0, 0)

time = [reader_arome.start_time,
        reader_arome.start_time + timedelta(hours=30)]
#time = reader_arome.start_time

Adjusting some configuration

o.set_config('drift:vertical_mixing', False)
o.set_config('processes:dispersion', False)
o.set_config('processes:evaporation', False)
o.set_config('processes:emulsification', True)
o.set_config('drift:current_uncertainty', .1)
o.set_config('drift:wind_uncertainty', 1)

# Seed oil elements at defined position and time
o.seed_elements(lon=4.6, lat=60.0, radius=50, number=3000, time=time,
                wind_drift_factor=.02)
21:49:00 INFO    opendrift.models.openoil.openoil:1711: Oil type not specified, using default: GENERIC BUNKER C
21:49:00 INFO    opendrift.models.openoil.adios.dirjs:90: Querying ADIOS database for oil: GENERIC BUNKER C
21:49:00 INFO    opendrift.models.openoil.openoil:1720: Using density 971.1 and viscosity 0.0005020658058702914 of oiltype GENERIC BUNKER C
21:49:00 INFO    opendrift.models.basemodel.environment:220: Adding a dynamical landmask with max. priority based on assumed maximum speed of 1.0 m/s. Adding a customised landmask may be faster...
21:49:05 INFO    opendrift.models.basemodel.environment:247: Fallback values will be used for the following variables which have no readers:
21:49:05 INFO    opendrift.models.basemodel.environment:250:    upward_sea_water_velocity: 0.000000
21:49:05 INFO    opendrift.models.basemodel.environment:250:    sea_surface_wave_significant_height: 0.000000
21:49:05 INFO    opendrift.models.basemodel.environment:250:    sea_surface_wave_stokes_drift_x_velocity: 0.000000
21:49:05 INFO    opendrift.models.basemodel.environment:250:    sea_surface_wave_stokes_drift_y_velocity: 0.000000
21:49:05 INFO    opendrift.models.basemodel.environment:250:    sea_surface_wave_period_at_variance_spectral_density_maximum: 0.000000
21:49:05 INFO    opendrift.models.basemodel.environment:250:    sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment: 0.000000
21:49:05 INFO    opendrift.models.basemodel.environment:250:    sea_ice_area_fraction: 0.000000
21:49:05 INFO    opendrift.models.basemodel.environment:250:    sea_ice_x_velocity: 0.000000
21:49:05 INFO    opendrift.models.basemodel.environment:250:    sea_ice_y_velocity: 0.000000
21:49:05 INFO    opendrift.models.basemodel.environment:250:    sea_water_temperature: 10.000000
21:49:05 INFO    opendrift.models.basemodel.environment:250:    sea_water_salinity: 34.000000
21:49:05 INFO    opendrift.models.basemodel.environment:250:    sea_floor_depth_below_sea_level: 10000.000000
21:49:05 INFO    opendrift.models.basemodel.environment:250:    ocean_vertical_diffusivity: 0.020000
21:49:05 INFO    opendrift.models.basemodel.environment:250:    ocean_mixed_layer_thickness: 50.000000

Running model

o.run(end_time=reader_norkyst.end_time, time_step=1800,
      time_step_output=3600, outfile='openoil.nc',
      export_variables=['mass_oil'])
21:49:05 INFO    opendrift.models.basemodel:892: Using existing reader for land_binary_mask
21:49:05 INFO    opendrift.models.basemodel:904: All points are in ocean
21:49:05 INFO    opendrift.models.openoil.openoil:690: Oil-water surface tension is 0.035282 Nm
21:49:05 INFO    opendrift.models.openoil.openoil:703: Max water fraction not available for GENERIC BUNKER C, using default
21:49:05 INFO    opendrift.models.basemodel:1995: 2015-11-16 00:00:00 - step 1 of 132 - 50 active elements (0 deactivated)
21:49:05 INFO    opendrift.models.basemodel:1995: 2015-11-16 00:30:00 - step 2 of 132 - 100 active elements (0 deactivated)
21:49:05 INFO    opendrift.models.basemodel:1995: 2015-11-16 01:00:00 - step 3 of 132 - 150 active elements (0 deactivated)
21:49:05 INFO    opendrift.models.basemodel:1995: 2015-11-16 01:30:00 - step 4 of 132 - 200 active elements (0 deactivated)
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/root/project/opendrift/readers/interpolation/interpolators.py:17: RuntimeWarning: overflow encountered in cast
  data[mask] = np.finfo(np.float64).min
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21:49:07 INFO    opendrift.models.basemodel:1995: 2015-11-17 08:30:00 - step 66 of 132 - 1651 active elements (1349 deactivated)
21:49:07 WARNING opendrift.readers.basereader.structured:321: Data block from /root/project/tests/test_data/16Nov2015_NorKyst_z_surface/norkyst800_subset_16Nov2015.nc not large enough to cover element positions within timestep. Buffer size (7) must be increased. See `Variables.set_buffer_size`.
21:49:07 INFO    opendrift.models.basemodel:1995: 2015-11-17 09:00:00 - step 67 of 132 - 1624 active elements (1376 deactivated)
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21:49:09 WARNING opendrift.models.basemodel:2090: The simulation stopped before requested end time was reached.
21:49:09 INFO    opendrift.models.basemodel:2092: ========================
21:49:09 INFO    opendrift.models.basemodel:2093: End of simulation:
21:49:09 INFO    opendrift.models.basemodel:2094: No more active or scheduled elements, quitting.
21:49:09 INFO    opendrift.models.basemodel:2095: Traceback (most recent call last):
  File "/root/project/opendrift/models/basemodel/__init__.py", line 2057, in run
    raise ValueError(
ValueError: No more active or scheduled elements, quitting.

21:49:09 INFO    opendrift.models.basemodel:2096: 'The simulation stopped before requested end time was reached.'

21:49:09 INFO    opendrift.models.basemodel:2099: ========================
21:49:09 INFO    opendrift.export.io_netcdf:112: Wrote 60 steps to file openoil.nc
/opt/conda/envs/opendrift/lib/python3.11/site-packages/numpy/ma/core.py:467: RuntimeWarning: invalid value encountered in cast
  fill_value = np.array(fill_value, copy=False, dtype=ndtype)

Print and plot results

o.plot(fast=True)
#o.plot(background=['x_sea_water_velocity', 'y_sea_water_velocity'], buffer=.5)
#o.animation(fast=True)
#o.animation(density=True, show_elements=False, fast=True)
OpenDrift - OpenOil (GENERIC BUNKER C) 2015-11-16 00:00 to 2015-11-18 11:00 UTC (60 steps)
21:49:09 WARNING opendrift.models.basemodel:2362: Plotting fast. This will make your plots less accurate.

(<GeoAxes: title={'center': 'OpenDrift - OpenOil (GENERIC BUNKER C)\n2015-11-16 00:00 to 2015-11-18 11:00 UTC (60 steps)'}>, <Figure size 479.908x1100 with 1 Axes>)

Or an animation can be generated with:

o.animation(fast=True)
21:49:20 WARNING opendrift.models.basemodel:2362: Plotting fast. This will make your plots less accurate.
/opt/conda/envs/opendrift/lib/python3.11/site-packages/cartopy/mpl/geoaxes.py:1696: UserWarning: No data for colormapping provided via 'c'. Parameters 'cmap' will be ignored
  result = super().scatter(*args, **kwargs)
21:49:22 INFO    opendrift.models.basemodel:4546: Saving animation to /root/project/docs/source/gallery/animations/example_generic_0.gif...
21:49:33 INFO    opendrift.models.basemodel:2986: Time to make animation: 0:00:12.341773
../_images/example_generic_0.gif

Total running time of the script: (0 minutes 34.740 seconds)

Gallery generated by Sphinx-Gallery