Note

Go to the end to download the full example code.

Oil in ice

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

o = OpenOil(loglevel=20)

09:32:51 INFO    opendrift:569: OpenDriftSimulation initialised (version 1.14.11 / v1.14.12-26-g8782b63)

Using live data from Barents 2.5 km ocean model

o.add_readers_from_list(['https://thredds.met.no/thredds/dodsC/fou-hi/barents_eps_zdepth_be'])

Adjusting some configuration

o.set_config('processes:dispersion',  False)
o.set_config('processes:evaporation',  False)
o.set_config('processes:emulsification',  False)
o.set_config('environment:constant:horizontal_diffusivity', 10)
o.set_config('drift:truncate_ocean_model_below_m', 3)

Imaginary oil spill in Hinlopen strait

o.seed_elements(lon=19.1909, lat=79.5986, radius=50,
                number=3000, time=datetime.now() - timedelta(days=7))

09:32:51 INFO    opendrift.models.openoil.openoil:1720: Oil type not specified, using default: GENERIC BUNKER C
09:32:51 INFO    opendrift.models.openoil.adios.dirjs:86: Querying ADIOS database for oil: GENERIC BUNKER C
09:32:51 INFO    opendrift.models.openoil.openoil:1731: Using density 988.1 and viscosity 0.021692333877975332 of oiltype GENERIC BUNKER C
09:32:51 INFO    opendrift.models.basemodel.environment:203: Adding a global landmask from GSHHG
09:32:57 INFO    opendrift.models.basemodel.environment:227: Fallback values will be used for the following variables which have no readers:
09:32:57 INFO    opendrift.models.basemodel.environment:230:    sea_surface_height: 0.000000
09:32:57 INFO    opendrift.models.basemodel.environment:230:    upward_sea_water_velocity: 0.000000
09:32:57 INFO    opendrift.models.basemodel.environment:230:    sea_surface_wave_significant_height: 0.000000
09:32:57 INFO    opendrift.models.basemodel.environment:230:    sea_surface_wave_stokes_drift_x_velocity: 0.000000
09:32:57 INFO    opendrift.models.basemodel.environment:230:    sea_surface_wave_stokes_drift_y_velocity: 0.000000
09:32:57 INFO    opendrift.models.basemodel.environment:230:    sea_surface_wave_period_at_variance_spectral_density_maximum: 0.000000
09:32:57 INFO    opendrift.models.basemodel.environment:230:    sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment: 0.000000
09:32:57 INFO    opendrift.models.basemodel.environment:230:    sea_ice_area_fraction: 0.000000
09:32:57 INFO    opendrift.models.basemodel.environment:230:    sea_ice_x_velocity: 0.000000
09:32:57 INFO    opendrift.models.basemodel.environment:230:    sea_ice_y_velocity: 0.000000
09:32:57 INFO    opendrift.models.basemodel.environment:230:    sea_water_temperature: 10.000000
09:32:57 INFO    opendrift.models.basemodel.environment:230:    sea_water_salinity: 34.000000
09:32:57 INFO    opendrift.models.basemodel.environment:230:    sea_floor_depth_below_sea_level: 10000.000000
09:32:57 INFO    opendrift.models.basemodel.environment:230:    ocean_vertical_diffusivity: 0.020000
09:32:57 INFO    opendrift.models.basemodel.environment:230:    ocean_mixed_layer_thickness: 50.000000

Running model

o.run(duration=timedelta(hours=48), time_step=1800, time_step_output=3600)

09:32:57 INFO    opendrift:1910: Skipping environment variable upward_sea_water_velocity because of condition ['drift:vertical_advection', 'is', False]
09:32:57 INFO    opendrift:1921: Storing previous values of element property lon because of condition (('general:coastline_action', 'in', ['stranding', 'previous']), 'or', ('general:seafloor_action', 'in', ['previous']))
09:32:57 INFO    opendrift:1921: Storing previous values of element property lat because of condition (('general:coastline_action', 'in', ['stranding', 'previous']), 'or', ('general:seafloor_action', 'in', ['previous']))
09:32:57 INFO    opendrift:958: Using existing reader for land_binary_mask to move elements to ocean
09:32:57 INFO    opendrift:989: All points are in ocean
09:32:57 INFO    opendrift.models.openoil.openoil:697: Oil-water surface tension is 0.035935 Nm
09:32:57 INFO    opendrift.models.openoil.openoil:710: Max water fraction not available for GENERIC BUNKER C, using default
09:32:57 INFO    opendrift:2237: 2026-09-21 09:32:51.032912 - step 1 of 96 - 3000 active elements (0 deactivated)
09:32:57 INFO    opendrift.readers:67: Opening file with xr.open_dataset
09:33:00 INFO    opendrift.readers.reader_netCDF_CF_generic:340: Detected dimensions: {'x': 'X', 'y': 'Y', 'z': 'depth', 'time': 'time'}
09:33:00 INFO    opendrift.readers.basereader:175: Variable x_sea_water_velocity will be rotated from eastward_sea_water_velocity
09:33:00 INFO    opendrift.readers.basereader:175: Variable y_sea_water_velocity will be rotated from northward_sea_water_velocity
09:33:03 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.0057478277 to -0.0020563202) found for ocean_vertical_diffusivity, replacing with NaN
09:33:03 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:04 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.0057429583 to -0.001380967) found for ocean_vertical_diffusivity, replacing with NaN
09:33:04 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:04 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:04 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:05 INFO    opendrift:2237: 2026-09-21 10:02:51.032912 - step 2 of 96 - 3000 active elements (0 deactivated)
09:33:06 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.0058553955 to -0.0012265687) found for ocean_vertical_diffusivity, replacing with NaN
09:33:06 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:06 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:06 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:06 INFO    opendrift:2237: 2026-09-21 10:32:51.032912 - step 3 of 96 - 3000 active elements (0 deactivated)
09:33:06 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:06 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:07 INFO    opendrift:2237: 2026-09-21 11:02:51.032912 - step 4 of 96 - 3000 active elements (0 deactivated)
09:33:08 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.006040035 to -0.0015300047) found for ocean_vertical_diffusivity, replacing with NaN
09:33:08 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:08 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:08 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:09 INFO    opendrift:2237: 2026-09-21 11:32:51.032912 - step 5 of 96 - 3000 active elements (0 deactivated)
09:33:09 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:09 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:09 INFO    opendrift:2237: 2026-09-21 12:02:51.032912 - step 6 of 96 - 3000 active elements (0 deactivated)
09:33:10 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.005564053 to -0.0014620823) found for ocean_vertical_diffusivity, replacing with NaN
09:33:10 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:10 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:11 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:11 INFO    opendrift:2237: 2026-09-21 12:32:51.032912 - step 7 of 96 - 3000 active elements (0 deactivated)
09:33:11 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:11 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:11 INFO    opendrift:2237: 2026-09-21 13:02:51.032912 - step 8 of 96 - 3000 active elements (0 deactivated)
09:33:13 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.005089674 to -0.0007360078) found for ocean_vertical_diffusivity, replacing with NaN
09:33:13 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:13 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:13 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:13 INFO    opendrift:2237: 2026-09-21 13:32:51.032912 - step 9 of 96 - 3000 active elements (0 deactivated)
09:33:13 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:13 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:13 INFO    opendrift:2237: 2026-09-21 14:02:51.032912 - step 10 of 96 - 3000 active elements (0 deactivated)
09:33:15 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.0057166587 to -0.00075188937) found for ocean_vertical_diffusivity, replacing with NaN
09:33:15 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:15 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:15 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:15 INFO    opendrift:2237: 2026-09-21 14:32:51.032912 - step 11 of 96 - 3000 active elements (0 deactivated)
09:33:15 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:15 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:15 INFO    opendrift:2237: 2026-09-21 15:02:51.032912 - step 12 of 96 - 3000 active elements (0 deactivated)
09:33:17 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.0066272216 to -0.0007367019) found for ocean_vertical_diffusivity, replacing with NaN
09:33:17 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:17 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:17 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:17 INFO    opendrift:2237: 2026-09-21 15:32:51.032912 - step 13 of 96 - 3000 active elements (0 deactivated)
09:33:17 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:17 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:17 INFO    opendrift:2237: 2026-09-21 16:02:51.032912 - step 14 of 96 - 3000 active elements (0 deactivated)
09:33:19 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.0067591416 to -0.00071583805) found for ocean_vertical_diffusivity, replacing with NaN
09:33:19 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:19 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:19 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:19 INFO    opendrift:2237: 2026-09-21 16:32:51.032912 - step 15 of 96 - 3000 active elements (0 deactivated)
09:33:19 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:19 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:19 INFO    opendrift:2237: 2026-09-21 17:02:51.032912 - step 16 of 96 - 3000 active elements (0 deactivated)
09:33:21 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.006509873 to -0.00043887386) found for ocean_vertical_diffusivity, replacing with NaN
09:33:21 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:21 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:22 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:22 INFO    opendrift:2237: 2026-09-21 17:32:51.032912 - step 17 of 96 - 3000 active elements (0 deactivated)
09:33:22 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:22 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:22 INFO    opendrift:2237: 2026-09-21 18:02:51.032912 - step 18 of 96 - 3000 active elements (0 deactivated)
09:33:24 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.00507482 to -0.00043059973) found for ocean_vertical_diffusivity, replacing with NaN
09:33:24 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:24 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:24 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:24 INFO    opendrift:2237: 2026-09-21 18:32:51.032912 - step 19 of 96 - 3000 active elements (0 deactivated)
09:33:24 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:24 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:24 INFO    opendrift:2237: 2026-09-21 19:02:51.032912 - step 20 of 96 - 3000 active elements (0 deactivated)
09:33:26 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.0039633145 to -0.0006827107) found for ocean_vertical_diffusivity, replacing with NaN
09:33:26 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:26 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:26 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:26 INFO    opendrift:2237: 2026-09-21 19:32:51.032912 - step 21 of 96 - 3000 active elements (0 deactivated)
09:33:26 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:26 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:26 INFO    opendrift:2237: 2026-09-21 20:02:51.032912 - step 22 of 96 - 3000 active elements (0 deactivated)
09:33:28 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.0035145949 to -0.00044320297) found for ocean_vertical_diffusivity, replacing with NaN
09:33:28 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:28 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:28 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:28 INFO    opendrift:2237: 2026-09-21 20:32:51.032912 - step 23 of 96 - 3000 active elements (0 deactivated)
09:33:28 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:28 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:28 INFO    opendrift:2237: 2026-09-21 21:02:51.032912 - step 24 of 96 - 3000 active elements (0 deactivated)
09:33:30 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.0031246517 to -0.0005108138) found for ocean_vertical_diffusivity, replacing with NaN
09:33:30 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:30 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:30 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:30 INFO    opendrift:2237: 2026-09-21 21:32:51.032912 - step 25 of 96 - 3000 active elements (0 deactivated)
09:33:30 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:30 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:31 INFO    opendrift:2237: 2026-09-21 22:02:51.032912 - step 26 of 96 - 3000 active elements (0 deactivated)
09:33:33 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.0022874218 to -0.00042597152) found for ocean_vertical_diffusivity, replacing with NaN
09:33:33 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:33 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:33 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:33 INFO    opendrift:2237: 2026-09-21 22:32:51.032912 - step 27 of 96 - 3000 active elements (0 deactivated)
09:33:33 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:33 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:33 INFO    opendrift:2237: 2026-09-21 23:02:51.032912 - step 28 of 96 - 3000 active elements (0 deactivated)
09:33:36 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.0034979826 to -0.00043187613) found for ocean_vertical_diffusivity, replacing with NaN
09:33:36 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:36 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:36 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:36 INFO    opendrift:2237: 2026-09-21 23:32:51.032912 - step 29 of 96 - 3000 active elements (0 deactivated)
09:33:36 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:36 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:36 INFO    opendrift:2237: 2026-09-22 00:02:51.032912 - step 30 of 96 - 3000 active elements (0 deactivated)
09:33:38 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.004332802 to -0.00048379262) found for ocean_vertical_diffusivity, replacing with NaN
09:33:38 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:38 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:38 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:38 INFO    opendrift:2237: 2026-09-22 00:32:51.032912 - step 31 of 96 - 3000 active elements (0 deactivated)
09:33:38 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:38 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:38 INFO    opendrift:2237: 2026-09-22 01:02:51.032912 - step 32 of 96 - 3000 active elements (0 deactivated)
09:33:40 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.0046219933 to -0.0004992411) found for ocean_vertical_diffusivity, replacing with NaN
09:33:40 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:40 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:40 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:40 INFO    opendrift:2237: 2026-09-22 01:32:51.032912 - step 33 of 96 - 3000 active elements (0 deactivated)
09:33:40 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:40 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:40 INFO    opendrift:2237: 2026-09-22 02:02:51.032912 - step 34 of 96 - 3000 active elements (0 deactivated)
09:33:42 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.005828442 to -0.0009708065) found for ocean_vertical_diffusivity, replacing with NaN
09:33:42 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:42 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:42 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:42 INFO    opendrift:2237: 2026-09-22 02:32:51.032912 - step 35 of 96 - 3000 active elements (0 deactivated)
09:33:42 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:42 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:42 INFO    opendrift:2237: 2026-09-22 03:02:51.032912 - step 36 of 96 - 3000 active elements (0 deactivated)
09:33:44 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.014789787 to -0.0033118173) found for ocean_vertical_diffusivity, replacing with NaN
09:33:44 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:44 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:44 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:44 INFO    opendrift:2237: 2026-09-22 03:32:51.032912 - step 37 of 96 - 3000 active elements (0 deactivated)
09:33:44 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:44 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:44 INFO    opendrift:2237: 2026-09-22 04:02:51.032912 - step 38 of 96 - 3000 active elements (0 deactivated)
09:33:46 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.017580053 to -0.005572774) found for ocean_vertical_diffusivity, replacing with NaN
09:33:46 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:46 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:46 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:47 INFO    opendrift:2237: 2026-09-22 04:32:51.032912 - step 39 of 96 - 3000 active elements (0 deactivated)
09:33:47 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:47 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:47 INFO    opendrift:2237: 2026-09-22 05:02:51.032912 - step 40 of 96 - 3000 active elements (0 deactivated)
09:33:48 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.016948098 to -0.0058580725) found for ocean_vertical_diffusivity, replacing with NaN
09:33:48 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:48 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:48 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:49 INFO    opendrift:2237: 2026-09-22 05:32:51.032912 - step 41 of 96 - 3000 active elements (0 deactivated)
09:33:49 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:49 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:49 INFO    opendrift:2237: 2026-09-22 06:02:51.032912 - step 42 of 96 - 3000 active elements (0 deactivated)
09:33:50 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.01429824 to -0.0031862278) found for ocean_vertical_diffusivity, replacing with NaN
09:33:50 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:50 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:50 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:51 INFO    opendrift:2237: 2026-09-22 06:32:51.032912 - step 43 of 96 - 3000 active elements (0 deactivated)
09:33:51 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:51 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:51 INFO    opendrift:2237: 2026-09-22 07:02:51.032912 - step 44 of 96 - 3000 active elements (0 deactivated)
09:33:53 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.011887294 to -0.0032279661) found for ocean_vertical_diffusivity, replacing with NaN
09:33:53 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:53 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:53 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:53 INFO    opendrift:2237: 2026-09-22 07:32:51.032912 - step 45 of 96 - 3000 active elements (0 deactivated)
09:33:53 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:53 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:53 INFO    opendrift:2237: 2026-09-22 08:02:51.032912 - step 46 of 96 - 3000 active elements (0 deactivated)
09:33:55 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.009265934 to -0.0027753143) found for ocean_vertical_diffusivity, replacing with NaN
09:33:55 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:55 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:55 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:55 INFO    opendrift:2237: 2026-09-22 08:32:51.032912 - step 47 of 96 - 2999 active elements (1 deactivated)
09:33:55 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:55 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:55 INFO    opendrift:2237: 2026-09-22 09:02:51.032912 - step 48 of 96 - 2997 active elements (3 deactivated)
09:33:57 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.008348169 to -0.0016520624) found for ocean_vertical_diffusivity, replacing with NaN
09:33:57 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:33:57 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:57 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:57 INFO    opendrift:2237: 2026-09-22 09:32:51.032912 - step 49 of 96 - 2994 active elements (6 deactivated)
09:33:57 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:57 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:33:57 INFO    opendrift:2237: 2026-09-22 10:02:51.032912 - step 50 of 96 - 2992 active elements (8 deactivated)
09:34:00 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.007324248 to -0.0021179381) found for ocean_vertical_diffusivity, replacing with NaN
09:34:00 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:00 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:00 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:00 INFO    opendrift:2237: 2026-09-22 10:32:51.032912 - step 51 of 96 - 2991 active elements (9 deactivated)
09:34:00 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:00 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:00 INFO    opendrift:2237: 2026-09-22 11:02:51.032912 - step 52 of 96 - 2988 active elements (12 deactivated)
09:34:02 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.00564795 to -0.0013022043) found for ocean_vertical_diffusivity, replacing with NaN
09:34:02 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:02 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:02 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:02 INFO    opendrift:2237: 2026-09-22 11:32:51.032912 - step 53 of 96 - 2986 active elements (14 deactivated)
09:34:02 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:02 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:02 INFO    opendrift:2237: 2026-09-22 12:02:51.032912 - step 54 of 96 - 2982 active elements (18 deactivated)
09:34:04 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.0050069476 to -0.0011387465) found for ocean_vertical_diffusivity, replacing with NaN
09:34:04 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:04 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:04 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:04 INFO    opendrift:2237: 2026-09-22 12:32:51.032912 - step 55 of 96 - 2972 active elements (28 deactivated)
09:34:04 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:04 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:04 INFO    opendrift:2237: 2026-09-22 13:02:51.032912 - step 56 of 96 - 2963 active elements (37 deactivated)
09:34:06 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.004212625 to -0.0015102779) found for ocean_vertical_diffusivity, replacing with NaN
09:34:06 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:06 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:06 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:06 INFO    opendrift:2237: 2026-09-22 13:32:51.032912 - step 57 of 96 - 2960 active elements (40 deactivated)
09:34:06 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:06 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:06 INFO    opendrift:2237: 2026-09-22 14:02:51.032912 - step 58 of 96 - 2954 active elements (46 deactivated)
09:34:10 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.0055065816 to -0.0010151217) found for ocean_vertical_diffusivity, replacing with NaN
09:34:10 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:10 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:10 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:10 INFO    opendrift:2237: 2026-09-22 14:32:51.032912 - step 59 of 96 - 2950 active elements (50 deactivated)
09:34:10 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:10 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:10 INFO    opendrift:2237: 2026-09-22 15:02:51.032912 - step 60 of 96 - 2942 active elements (58 deactivated)
09:34:12 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.006573714 to -0.001216546) found for ocean_vertical_diffusivity, replacing with NaN
09:34:12 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:12 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:12 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:12 INFO    opendrift:2237: 2026-09-22 15:32:51.032912 - step 61 of 96 - 2935 active elements (65 deactivated)
09:34:12 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:12 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:12 INFO    opendrift:2237: 2026-09-22 16:02:51.032912 - step 62 of 96 - 2929 active elements (71 deactivated)
09:34:14 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.007877521 to -0.00094152684) found for ocean_vertical_diffusivity, replacing with NaN
09:34:14 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:14 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:14 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:14 INFO    opendrift:2237: 2026-09-22 16:32:51.032912 - step 63 of 96 - 2920 active elements (80 deactivated)
09:34:14 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:14 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:14 INFO    opendrift:2237: 2026-09-22 17:02:51.032912 - step 64 of 96 - 2913 active elements (87 deactivated)
09:34:17 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.010161033 to -0.0008057132) found for ocean_vertical_diffusivity, replacing with NaN
09:34:17 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:17 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:17 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:17 INFO    opendrift:2237: 2026-09-22 17:32:51.032912 - step 65 of 96 - 2905 active elements (95 deactivated)
09:34:17 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:17 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:17 INFO    opendrift:2237: 2026-09-22 18:02:51.032912 - step 66 of 96 - 2899 active elements (101 deactivated)
09:34:20 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.011479047 to -0.0014031932) found for ocean_vertical_diffusivity, replacing with NaN
09:34:20 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:20 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:20 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:20 INFO    opendrift:2237: 2026-09-22 18:32:51.032912 - step 67 of 96 - 2896 active elements (104 deactivated)
09:34:20 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:20 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:20 INFO    opendrift:2237: 2026-09-22 19:02:51.032912 - step 68 of 96 - 2892 active elements (108 deactivated)
09:34:22 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.010767197 to -0.001123785) found for ocean_vertical_diffusivity, replacing with NaN
09:34:22 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:22 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:22 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:22 INFO    opendrift:2237: 2026-09-22 19:32:51.032912 - step 69 of 96 - 2892 active elements (108 deactivated)
09:34:22 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:22 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:23 INFO    opendrift:2237: 2026-09-22 20:02:51.032912 - step 70 of 96 - 2890 active elements (110 deactivated)
09:34:24 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.009791714 to -0.0008573222) found for ocean_vertical_diffusivity, replacing with NaN
09:34:24 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:24 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:25 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:25 INFO    opendrift:2237: 2026-09-22 20:32:51.032912 - step 71 of 96 - 2889 active elements (111 deactivated)
09:34:25 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:25 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:25 INFO    opendrift:2237: 2026-09-22 21:02:51.032912 - step 72 of 96 - 2889 active elements (111 deactivated)
09:34:27 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.009321241 to -0.001136331) found for ocean_vertical_diffusivity, replacing with NaN
09:34:27 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:27 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:27 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:27 INFO    opendrift:2237: 2026-09-22 21:32:51.032912 - step 73 of 96 - 2888 active elements (112 deactivated)
09:34:27 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:27 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:27 INFO    opendrift:2237: 2026-09-22 22:02:51.032912 - step 74 of 96 - 2887 active elements (113 deactivated)
09:34:29 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.00727848 to -0.0010876791) found for ocean_vertical_diffusivity, replacing with NaN
09:34:29 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:29 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:29 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:29 INFO    opendrift:2237: 2026-09-22 22:32:51.032912 - step 75 of 96 - 2886 active elements (114 deactivated)
09:34:29 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:29 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:29 INFO    opendrift:2237: 2026-09-22 23:02:51.032912 - step 76 of 96 - 2886 active elements (114 deactivated)
09:34:31 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.0077762264 to -0.00053191354) found for ocean_vertical_diffusivity, replacing with NaN
09:34:31 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:31 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:31 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:31 INFO    opendrift:2237: 2026-09-22 23:32:51.032912 - step 77 of 96 - 2886 active elements (114 deactivated)
09:34:31 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:31 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:32 INFO    opendrift:2237: 2026-09-23 00:02:51.032912 - step 78 of 96 - 2886 active elements (114 deactivated)
09:34:34 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.008384528 to -0.0005428337) found for ocean_vertical_diffusivity, replacing with NaN
09:34:34 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:34 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:34 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:34 INFO    opendrift:2237: 2026-09-23 00:32:51.032912 - step 79 of 96 - 2886 active elements (114 deactivated)
09:34:34 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:34 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:34 INFO    opendrift:2237: 2026-09-23 01:02:51.032912 - step 80 of 96 - 2886 active elements (114 deactivated)
09:34:36 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.0072856443 to -0.0006505006) found for ocean_vertical_diffusivity, replacing with NaN
09:34:36 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:36 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:36 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:36 INFO    opendrift:2237: 2026-09-23 01:32:51.032912 - step 81 of 96 - 2886 active elements (114 deactivated)
09:34:36 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:36 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:36 INFO    opendrift:2237: 2026-09-23 02:02:51.032912 - step 82 of 96 - 2886 active elements (114 deactivated)
09:34:38 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.010029213 to -0.00069700665) found for ocean_vertical_diffusivity, replacing with NaN
09:34:38 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:38 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:38 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:38 INFO    opendrift:2237: 2026-09-23 02:32:51.032912 - step 83 of 96 - 2886 active elements (114 deactivated)
09:34:38 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:38 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:38 INFO    opendrift:2237: 2026-09-23 03:02:51.032912 - step 84 of 96 - 2886 active elements (114 deactivated)
09:34:40 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.015374137 to -0.0012117233) found for ocean_vertical_diffusivity, replacing with NaN
09:34:40 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:40 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:40 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:40 INFO    opendrift:2237: 2026-09-23 03:32:51.032912 - step 85 of 96 - 2886 active elements (114 deactivated)
09:34:40 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:40 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:40 INFO    opendrift:2237: 2026-09-23 04:02:51.032912 - step 86 of 96 - 2886 active elements (114 deactivated)
09:34:42 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.021575978 to -0.0021681413) found for ocean_vertical_diffusivity, replacing with NaN
09:34:42 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:42 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:42 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:42 INFO    opendrift:2237: 2026-09-23 04:32:51.032912 - step 87 of 96 - 2886 active elements (114 deactivated)
09:34:42 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:42 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:42 INFO    opendrift:2237: 2026-09-23 05:02:51.032912 - step 88 of 96 - 2886 active elements (114 deactivated)
09:34:44 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.018422192 to -0.0015781602) found for ocean_vertical_diffusivity, replacing with NaN
09:34:44 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:44 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:44 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:44 INFO    opendrift:2237: 2026-09-23 05:32:51.032912 - step 89 of 96 - 2886 active elements (114 deactivated)
09:34:44 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:44 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:44 INFO    opendrift:2237: 2026-09-23 06:02:51.032912 - step 90 of 96 - 2885 active elements (115 deactivated)
09:34:46 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.015406413 to -0.0010372913) found for ocean_vertical_diffusivity, replacing with NaN
09:34:46 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:46 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:46 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:46 INFO    opendrift:2237: 2026-09-23 06:32:51.032912 - step 91 of 96 - 2884 active elements (116 deactivated)
09:34:46 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:46 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:47 INFO    opendrift:2237: 2026-09-23 07:02:51.032912 - step 92 of 96 - 2882 active elements (118 deactivated)
09:34:48 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.013060663 to -0.0010024458) found for ocean_vertical_diffusivity, replacing with NaN
09:34:48 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:48 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:48 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:48 INFO    opendrift:2237: 2026-09-23 07:32:51.032912 - step 93 of 96 - 2880 active elements (120 deactivated)
09:34:48 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:48 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:49 INFO    opendrift:2237: 2026-09-23 08:02:51.032912 - step 94 of 96 - 2877 active elements (123 deactivated)
09:34:50 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.010434872 to -0.00066465855) found for ocean_vertical_diffusivity, replacing with NaN
09:34:50 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:50 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:50 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:50 INFO    opendrift:2237: 2026-09-23 08:32:51.032912 - step 95 of 96 - 2876 active elements (124 deactivated)
09:34:50 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:50 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:51 INFO    opendrift:2237: 2026-09-23 09:02:51.032912 - step 96 of 96 - 2875 active elements (125 deactivated)
09:34:52 WARNING opendrift.readers.basereader.variables:660: Invalid values (-0.012031448 to -0.00066372217) found for ocean_vertical_diffusivity, replacing with NaN
09:34:52 WARNING opendrift.readers.basereader.variables:663: (allowed range: [0, 1])
09:34:52 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
09:34:52 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning

<xarray.Dataset> Size: 26MB
Dimensions:                                                                              (
                                                                                          trajectory: 3000,
                                                                                          time: 49)
Coordinates:
  * trajectory                                                                           (trajectory) int64 24kB ...
  * time                                                                                 (time) datetime64[ns] 392B ...
Data variables: (12/44)
    status                                                                               (trajectory, time) float32 588kB ...
    moving                                                                               (trajectory, time) float32 588kB ...
    age_seconds                                                                          (trajectory, time) float32 588kB ...
    origin_marker                                                                        (trajectory, time) float32 588kB ...
    lon                                                                                  (trajectory, time) float32 588kB ...
    lat                                                                                  (trajectory, time) float32 588kB ...
    ...                                                                                   ...
    sea_water_salinity                                                                   (trajectory, time) float32 588kB ...
    sea_floor_depth_below_sea_level                                                      (trajectory, time) float32 588kB ...
    horizontal_diffusivity                                                               (trajectory, time) float32 588kB ...
    ocean_vertical_diffusivity                                                           (trajectory, time) float32 588kB ...
    land_binary_mask                                                                     (trajectory, time) float32 588kB ...
    ocean_mixed_layer_thickness                                                          (trajectory, time) float32 588kB ...
Attributes: (12/167)
    Conventions:                                                             ...
    standard_name_vocabulary:                                                ...
    featureType:                                                             ...
    title:                                                                   ...
    summary:                                                                 ...
    keywords:                                                                ...
    ...                                                                                                               ...
    geospatial_lon_units:                                                    ...
    geospatial_lon_resolution:                                               ...
    runtime:                                                                 ...
    geospatial_vertical_min:                                                 ...
    geospatial_vertical_max:                                                 ...
    geospatial_vertical_positive:                                            ...


Print and plot results

print(o)
o.animation(background='sea_ice_area_fraction', cmap=cmocean.cm.ice,
            vmin=0, vmax=1, bgalpha=1, fast=False)

===========================
--------------------
Reader performance:
--------------------
constant_reader
 0:00:00.0  total
 0:00:00.0  preparing
 0:00:00.0  reading
 0:00:00.0  masking
--------------------
global_landmask
 0:00:00.0  total
 0:00:00.0  preparing
 0:00:00.0  reading
 0:00:00.0  masking
--------------------
https://thredds.met.no/thredds/dodsC/fou-hi/barents_eps_zdepth_be
 0:01:40.7  total
 0:00:00.0  preparing
 0:01:39.5  reading
 0:00:01.7  interpolation
 0:00:00.1  interpolation_time
 0:00:01.1  rotating vectors
 0:00:00.0  masking
--------------------
Performance:
 2:02.1 total time
    6.0 configuration
    0.1 preparing main loop
      0.0 moving elements to ocean
 1:55.9 main loop
      6.3 updating elements
        0.0 oil weathering
          0.0 updating viscosities
          0.0 updating densities
        5.7 vertical mixing
    0.0 cleaning up
--------------------
===========================
Model:  OpenOil     (OpenDrift version 1.14.11)
        2870 active Oil particles  (130 deactivated, 0 scheduled)
-------------------
Environment variables:
  -----
  horizontal_diffusivity
     1) constant_reader
  -----
  land_binary_mask
     1) global_landmask
  -----
  ocean_vertical_diffusivity
  sea_floor_depth_below_sea_level
  sea_ice_area_fraction
  sea_ice_x_velocity
  sea_ice_y_velocity
  sea_surface_height
  sea_water_salinity
  sea_water_temperature
  x_sea_water_velocity
  x_wind
  y_sea_water_velocity
  y_wind
     1) https://thredds.met.no/thredds/dodsC/fou-hi/barents_eps_zdepth_be
  -----
Readers not added for the following variables:
  ocean_mixed_layer_thickness
  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

Discarded readers:

Time:
        Start: 2026-09-21 09:32:51.032912 UTC
        Present: 2026-09-23 09:32:51.032912 UTC
        Calculation steps: 96 * 0:30:00 - total time: 2 days, 0:00:00
        Output steps: 49 * 1:00:00
===========================

09:35:05 INFO    opendrift:4823: Saving animation to /root/project/docs/source/gallery/animations/example_oil_ice_0.gif...
09:35:30 INFO    opendrift:3241: Time to make animation: 0:00:36.896837
../_images/example_oil_ice_0.gif 
o.plot(background='sea_ice_area_fraction', cmap=cmocean.cm.ice,
       vmin=0, vmax=1, bgalpha=1, fast=False)
OpenDrift - OpenOil (GENERIC BUNKER C) 2026-09-21 09:32 to 2026-09-23 09:32 UTC (49 steps)
(<GeoAxes: title={'center': 'OpenDrift - OpenOil (GENERIC BUNKER C)\n2026-09-21 09:32 to 2026-09-23 09:32 UTC (49 steps)'}>, <Figure size 666.652x1100 with 2 Axes>)

Total running time of the script: (3 minutes 0.234 seconds)

Gallery generated by Sphinx-Gallery