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)
16:19:16 INFO opendrift:576: OpenDriftSimulation initialised (version 1.14.8 / v1.14.8-15-ge839285)
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))
16:19:16 INFO opendrift.models.openoil.openoil:1711: Oil type not specified, using default: GENERIC BUNKER C
16:19:16 INFO opendrift.models.openoil.adios.dirjs:86: Querying ADIOS database for oil: GENERIC BUNKER C
16:19:16 INFO opendrift.models.openoil.openoil:1720: Using density 988.1 and viscosity 0.02169233387797564 of oiltype GENERIC BUNKER C
16:19:16 INFO opendrift.models.basemodel.environment:203: Adding a global landmask from GSHHG
16:19:20 INFO opendrift.models.basemodel.environment:227: Fallback values will be used for the following variables which have no readers:
16:19:20 INFO opendrift.models.basemodel.environment:230: sea_surface_height: 0.000000
16:19:20 INFO opendrift.models.basemodel.environment:230: upward_sea_water_velocity: 0.000000
16:19:20 INFO opendrift.models.basemodel.environment:230: sea_surface_wave_significant_height: 0.000000
16:19:20 INFO opendrift.models.basemodel.environment:230: sea_surface_wave_stokes_drift_x_velocity: 0.000000
16:19:20 INFO opendrift.models.basemodel.environment:230: sea_surface_wave_stokes_drift_y_velocity: 0.000000
16:19:20 INFO opendrift.models.basemodel.environment:230: sea_surface_wave_period_at_variance_spectral_density_maximum: 0.000000
16:19:20 INFO opendrift.models.basemodel.environment:230: sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment: 0.000000
16:19:20 INFO opendrift.models.basemodel.environment:230: sea_ice_area_fraction: 0.000000
16:19:20 INFO opendrift.models.basemodel.environment:230: sea_ice_x_velocity: 0.000000
16:19:20 INFO opendrift.models.basemodel.environment:230: sea_ice_y_velocity: 0.000000
16:19:20 INFO opendrift.models.basemodel.environment:230: sea_water_temperature: 10.000000
16:19:20 INFO opendrift.models.basemodel.environment:230: sea_water_salinity: 34.000000
16:19:20 INFO opendrift.models.basemodel.environment:230: sea_floor_depth_below_sea_level: 10000.000000
16:19:20 INFO opendrift.models.basemodel.environment:230: ocean_vertical_diffusivity: 0.020000
16:19:20 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)
16:19:20 INFO opendrift:1836: Skipping environment variable upward_sea_water_velocity because of condition ['drift:vertical_advection', 'is', False]
16:19:20 INFO opendrift:1847: Storing previous values of element property lon because of condition (('general:coastline_action', 'in', ['stranding', 'previous']), 'or', ('general:seafloor_action', 'in', ['previous']))
16:19:20 INFO opendrift:1847: Storing previous values of element property lat because of condition (('general:coastline_action', 'in', ['stranding', 'previous']), 'or', ('general:seafloor_action', 'in', ['previous']))
16:19:20 INFO opendrift:955: Using existing reader for land_binary_mask to move elements to ocean
16:19:20 INFO opendrift:986: All points are in ocean
16:19:20 INFO opendrift.models.openoil.openoil:695: Oil-water surface tension is 0.035935 Nm
16:19:20 INFO opendrift.models.openoil.openoil:708: Max water fraction not available for GENERIC BUNKER C, using default
16:19:20 INFO opendrift:2144: 2026-02-09 16:19:16.327868 - step 1 of 96 - 3000 active elements (0 deactivated)
16:19:20 INFO opendrift.readers:63: Opening file with xr.open_dataset
16:19:22 INFO opendrift.readers.reader_netCDF_CF_generic:332: Detected dimensions: {'x': 'X', 'y': 'Y', 'z': 'depth', 'time': 'time'}
16:19:22 INFO opendrift.readers.basereader:178: Variable x_sea_water_velocity will be rotated from eastward_sea_water_velocity
16:19:22 INFO opendrift.readers.basereader:178: Variable y_sea_water_velocity will be rotated from northward_sea_water_velocity
16:19:25 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.017045513 to -0.0060364073) found for ocean_vertical_diffusivity, replacing with NaN
16:19:25 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:19:27 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.013632009 to -0.0028188387) found for ocean_vertical_diffusivity, replacing with NaN
16:19:27 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:19:27 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:27 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:27 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:27 INFO opendrift:2144: 2026-02-09 16:49:16.327868 - step 2 of 96 - 3000 active elements (0 deactivated)
16:19:27 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:27 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:27 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:27 INFO opendrift:2144: 2026-02-09 17:19:16.327868 - step 3 of 96 - 3000 active elements (0 deactivated)
16:19:29 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.0071790903 to -0.0017420774) found for ocean_vertical_diffusivity, replacing with NaN
16:19:29 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:19:29 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:29 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:29 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:29 INFO opendrift:2144: 2026-02-09 17:49:16.327868 - step 4 of 96 - 3000 active elements (0 deactivated)
16:19:29 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:29 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:29 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:29 INFO opendrift:2144: 2026-02-09 18:19:16.327868 - step 5 of 96 - 3000 active elements (0 deactivated)
16:19:31 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.004207595 to -0.0005518676) found for ocean_vertical_diffusivity, replacing with NaN
16:19:31 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:19:31 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:32 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:32 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:32 INFO opendrift:2144: 2026-02-09 18:49:16.327868 - step 6 of 96 - 3000 active elements (0 deactivated)
16:19:32 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:32 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:32 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:32 INFO opendrift:2144: 2026-02-09 19:19:16.327868 - step 7 of 96 - 3000 active elements (0 deactivated)
16:19:36 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.0040737023 to -0.0007064107) found for ocean_vertical_diffusivity, replacing with NaN
16:19:36 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:19:36 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:36 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:36 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:36 INFO opendrift:2144: 2026-02-09 19:49:16.327868 - step 8 of 96 - 3000 active elements (0 deactivated)
16:19:36 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:36 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:38 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:38 INFO opendrift:2144: 2026-02-09 20:19:16.327868 - step 9 of 96 - 2992 active elements (8 deactivated)
16:19:40 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.009341711 to -0.0031868862) found for ocean_vertical_diffusivity, replacing with NaN
16:19:40 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:19:40 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:40 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:40 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:40 INFO opendrift:2144: 2026-02-09 20:49:16.327868 - step 10 of 96 - 2886 active elements (114 deactivated)
16:19:40 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:40 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:40 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:40 INFO opendrift:2144: 2026-02-09 21:19:16.327868 - step 11 of 96 - 2607 active elements (393 deactivated)
16:19:42 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.015059896 to -0.0059550293) found for ocean_vertical_diffusivity, replacing with NaN
16:19:42 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:19:42 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:42 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:43 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:43 INFO opendrift:2144: 2026-02-09 21:49:16.327868 - step 12 of 96 - 2255 active elements (745 deactivated)
16:19:43 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:43 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:43 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:43 INFO opendrift:2144: 2026-02-09 22:19:16.327868 - step 13 of 96 - 2010 active elements (990 deactivated)
16:19:45 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.014530219 to -0.0059669307) found for ocean_vertical_diffusivity, replacing with NaN
16:19:45 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:19:45 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:45 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:45 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:45 INFO opendrift:2144: 2026-02-09 22:49:16.327868 - step 14 of 96 - 1875 active elements (1125 deactivated)
16:19:45 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:45 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:45 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:45 INFO opendrift:2144: 2026-02-09 23:19:16.327868 - step 15 of 96 - 1815 active elements (1185 deactivated)
16:19:47 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.01223761 to -0.003114355) found for ocean_vertical_diffusivity, replacing with NaN
16:19:47 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:19:47 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:47 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:47 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:48 INFO opendrift:2144: 2026-02-09 23:49:16.327868 - step 16 of 96 - 1779 active elements (1221 deactivated)
16:19:48 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:48 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:48 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:48 INFO opendrift:2144: 2026-02-10 00:19:16.327868 - step 17 of 96 - 1768 active elements (1232 deactivated)
16:19:50 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.012802657 to -0.0036263578) found for ocean_vertical_diffusivity, replacing with NaN
16:19:50 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:19:50 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:50 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:50 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:50 INFO opendrift:2144: 2026-02-10 00:49:16.327868 - step 18 of 96 - 1761 active elements (1239 deactivated)
16:19:50 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:50 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:50 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:50 INFO opendrift:2144: 2026-02-10 01:19:16.327868 - step 19 of 96 - 1756 active elements (1244 deactivated)
16:19:52 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.018021427 to -0.0066816634) found for ocean_vertical_diffusivity, replacing with NaN
16:19:52 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:19:52 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:52 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:52 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:52 INFO opendrift:2144: 2026-02-10 01:49:16.327868 - step 20 of 96 - 1752 active elements (1248 deactivated)
16:19:52 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:52 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:52 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:52 INFO opendrift:2144: 2026-02-10 02:19:16.327868 - step 21 of 96 - 1752 active elements (1248 deactivated)
16:19:54 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.02448423 to -0.008702928) found for ocean_vertical_diffusivity, replacing with NaN
16:19:54 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:19:54 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:54 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:54 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:55 INFO opendrift:2144: 2026-02-10 02:49:16.327868 - step 22 of 96 - 1750 active elements (1250 deactivated)
16:19:55 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:55 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:55 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:55 INFO opendrift:2144: 2026-02-10 03:19:16.327868 - step 23 of 96 - 1749 active elements (1251 deactivated)
16:19:57 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.024889063 to -0.0075338613) found for ocean_vertical_diffusivity, replacing with NaN
16:19:57 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:19:57 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:57 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:57 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:57 INFO opendrift:2144: 2026-02-10 03:49:16.327868 - step 24 of 96 - 1748 active elements (1252 deactivated)
16:19:57 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:57 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:57 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:57 INFO opendrift:2144: 2026-02-10 04:19:16.327868 - step 25 of 96 - 1748 active elements (1252 deactivated)
16:19:59 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.015518583 to -0.0014068487) found for ocean_vertical_diffusivity, replacing with NaN
16:19:59 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:19:59 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:59 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:59 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:59 INFO opendrift:2144: 2026-02-10 04:49:16.327868 - step 26 of 96 - 1748 active elements (1252 deactivated)
16:19:59 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:59 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:19:59 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:19:59 INFO opendrift:2144: 2026-02-10 05:19:16.327868 - step 27 of 96 - 1747 active elements (1253 deactivated)
16:20:01 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.013039153 to -0.0016602017) found for ocean_vertical_diffusivity, replacing with NaN
16:20:01 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:01 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:02 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:02 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:02 INFO opendrift:2144: 2026-02-10 05:49:16.327868 - step 28 of 96 - 1747 active elements (1253 deactivated)
16:20:02 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:02 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:02 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:02 INFO opendrift:2144: 2026-02-10 06:19:16.327868 - step 29 of 96 - 1746 active elements (1254 deactivated)
16:20:04 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.008208865 to -0.0006002555) found for ocean_vertical_diffusivity, replacing with NaN
16:20:04 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:04 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:04 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:04 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:04 INFO opendrift:2144: 2026-02-10 06:49:16.327868 - step 30 of 96 - 1746 active elements (1254 deactivated)
16:20:04 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:04 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:04 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:04 INFO opendrift:2144: 2026-02-10 07:19:16.327868 - step 31 of 96 - 1745 active elements (1255 deactivated)
16:20:07 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.002620947 to -0.000538789) found for ocean_vertical_diffusivity, replacing with NaN
16:20:07 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:07 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:07 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:07 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:07 INFO opendrift:2144: 2026-02-10 07:49:16.327868 - step 32 of 96 - 1745 active elements (1255 deactivated)
16:20:07 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:07 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:07 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:07 INFO opendrift:2144: 2026-02-10 08:19:16.327868 - step 33 of 96 - 1744 active elements (1256 deactivated)
16:20:09 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.006694806 to -0.00077331194) found for ocean_vertical_diffusivity, replacing with NaN
16:20:09 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:09 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:09 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:09 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:09 INFO opendrift:2144: 2026-02-10 08:49:16.327868 - step 34 of 96 - 1744 active elements (1256 deactivated)
16:20:09 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:09 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:09 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:09 INFO opendrift:2144: 2026-02-10 09:19:16.327868 - step 35 of 96 - 1742 active elements (1258 deactivated)
16:20:12 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.011402775 to -0.00093277235) found for ocean_vertical_diffusivity, replacing with NaN
16:20:12 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:12 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:12 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:12 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:12 INFO opendrift:2144: 2026-02-10 09:49:16.327868 - step 36 of 96 - 1741 active elements (1259 deactivated)
16:20:12 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:12 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:12 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:12 INFO opendrift:2144: 2026-02-10 10:19:16.327868 - step 37 of 96 - 1740 active elements (1260 deactivated)
16:20:14 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.009893081 to -0.0011773105) found for ocean_vertical_diffusivity, replacing with NaN
16:20:14 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:14 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:14 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:14 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:14 INFO opendrift:2144: 2026-02-10 10:49:16.327868 - step 38 of 96 - 1739 active elements (1261 deactivated)
16:20:14 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:14 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:14 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:14 INFO opendrift:2144: 2026-02-10 11:19:16.327868 - step 39 of 96 - 1738 active elements (1262 deactivated)
16:20:16 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.007223041 to -0.0011348044) found for ocean_vertical_diffusivity, replacing with NaN
16:20:16 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:16 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:16 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:16 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:16 INFO opendrift:2144: 2026-02-10 11:49:16.327868 - step 40 of 96 - 1738 active elements (1262 deactivated)
16:20:16 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:16 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:17 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:17 INFO opendrift:2144: 2026-02-10 12:19:16.327868 - step 41 of 96 - 1737 active elements (1263 deactivated)
16:20:19 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.007894602 to -0.0012013993) found for ocean_vertical_diffusivity, replacing with NaN
16:20:19 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:19 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:19 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:19 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:19 INFO opendrift:2144: 2026-02-10 12:49:16.327868 - step 42 of 96 - 1734 active elements (1266 deactivated)
16:20:19 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:19 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:19 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:19 INFO opendrift:2144: 2026-02-10 13:19:16.327868 - step 43 of 96 - 1732 active elements (1268 deactivated)
16:20:21 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.0102292495 to -0.0012089284) found for ocean_vertical_diffusivity, replacing with NaN
16:20:21 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:21 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:21 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:21 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:21 INFO opendrift:2144: 2026-02-10 13:49:16.327868 - step 44 of 96 - 1732 active elements (1268 deactivated)
16:20:21 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:21 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:21 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:21 INFO opendrift:2144: 2026-02-10 14:19:16.327868 - step 45 of 96 - 1730 active elements (1270 deactivated)
16:20:24 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.013460089 to -0.0013604194) found for ocean_vertical_diffusivity, replacing with NaN
16:20:24 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:24 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:24 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:24 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:24 INFO opendrift:2144: 2026-02-10 14:49:16.327868 - step 46 of 96 - 1730 active elements (1270 deactivated)
16:20:24 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:24 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:24 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:24 INFO opendrift:2144: 2026-02-10 15:19:16.327868 - step 47 of 96 - 1727 active elements (1273 deactivated)
16:20:27 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.016948896 to -0.0015243605) found for ocean_vertical_diffusivity, replacing with NaN
16:20:27 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:27 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:27 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:27 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:27 INFO opendrift:2144: 2026-02-10 15:49:16.327868 - step 48 of 96 - 1722 active elements (1278 deactivated)
16:20:27 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:27 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:27 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:27 INFO opendrift:2144: 2026-02-10 16:19:16.327868 - step 49 of 96 - 1710 active elements (1290 deactivated)
16:20:30 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.012960805 to -0.0015265116) found for ocean_vertical_diffusivity, replacing with NaN
16:20:30 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:30 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:30 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:30 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:30 INFO opendrift:2144: 2026-02-10 16:49:16.327868 - step 50 of 96 - 1701 active elements (1299 deactivated)
16:20:30 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:30 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:30 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:30 INFO opendrift:2144: 2026-02-10 17:19:16.327868 - step 51 of 96 - 1692 active elements (1308 deactivated)
16:20:32 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.015004704 to -0.0016810157) found for ocean_vertical_diffusivity, replacing with NaN
16:20:32 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:32 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:32 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:32 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:32 INFO opendrift:2144: 2026-02-10 17:49:16.327868 - step 52 of 96 - 1681 active elements (1319 deactivated)
16:20:32 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:32 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:32 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:32 INFO opendrift:2144: 2026-02-10 18:19:16.327868 - step 53 of 96 - 1672 active elements (1328 deactivated)
16:20:34 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.012689336 to -0.0009609693) found for ocean_vertical_diffusivity, replacing with NaN
16:20:34 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:34 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:34 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:34 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:34 INFO opendrift:2144: 2026-02-10 18:49:16.327868 - step 54 of 96 - 1663 active elements (1337 deactivated)
16:20:34 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:34 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:35 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:35 INFO opendrift:2144: 2026-02-10 19:19:16.327868 - step 55 of 96 - 1655 active elements (1345 deactivated)
16:20:37 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.006359388 to -0.0007449583) found for ocean_vertical_diffusivity, replacing with NaN
16:20:37 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:37 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:37 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:37 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:37 INFO opendrift:2144: 2026-02-10 19:49:16.327868 - step 56 of 96 - 1651 active elements (1349 deactivated)
16:20:37 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:37 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:37 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:37 INFO opendrift:2144: 2026-02-10 20:19:16.327868 - step 57 of 96 - 1645 active elements (1355 deactivated)
16:20:39 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.0051360773 to -0.0006642007) found for ocean_vertical_diffusivity, replacing with NaN
16:20:39 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:39 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:39 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:39 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:39 INFO opendrift:2144: 2026-02-10 20:49:16.327868 - step 58 of 96 - 1636 active elements (1364 deactivated)
16:20:39 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:39 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:39 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:39 INFO opendrift:2144: 2026-02-10 21:19:16.327868 - step 59 of 96 - 1624 active elements (1376 deactivated)
16:20:42 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.010266454 to -0.0012809066) found for ocean_vertical_diffusivity, replacing with NaN
16:20:42 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:42 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:42 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:42 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:42 INFO opendrift:2144: 2026-02-10 21:49:16.327868 - step 60 of 96 - 1616 active elements (1384 deactivated)
16:20:42 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:42 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:42 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:42 INFO opendrift:2144: 2026-02-10 22:19:16.327868 - step 61 of 96 - 1611 active elements (1389 deactivated)
16:20:44 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.013941323 to -0.0012175451) found for ocean_vertical_diffusivity, replacing with NaN
16:20:44 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:44 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:44 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:44 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:44 INFO opendrift:2144: 2026-02-10 22:49:16.327868 - step 62 of 96 - 1600 active elements (1400 deactivated)
16:20:44 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:44 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:44 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:44 INFO opendrift:2144: 2026-02-10 23:19:16.327868 - step 63 of 96 - 1594 active elements (1406 deactivated)
16:20:47 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.008525512 to -0.0014783716) found for ocean_vertical_diffusivity, replacing with NaN
16:20:47 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:47 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:47 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:47 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:47 INFO opendrift:2144: 2026-02-10 23:49:16.327868 - step 64 of 96 - 1589 active elements (1411 deactivated)
16:20:47 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:47 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:47 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:47 INFO opendrift:2144: 2026-02-11 00:19:16.327868 - step 65 of 96 - 1581 active elements (1419 deactivated)
16:20:49 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.008009341 to -0.0012860117) found for ocean_vertical_diffusivity, replacing with NaN
16:20:49 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:49 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:49 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:49 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:49 INFO opendrift:2144: 2026-02-11 00:49:16.327868 - step 66 of 96 - 1568 active elements (1432 deactivated)
16:20:49 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:49 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:49 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:49 INFO opendrift:2144: 2026-02-11 01:19:16.327868 - step 67 of 96 - 1559 active elements (1441 deactivated)
16:20:51 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.008664491 to -0.00083076116) found for ocean_vertical_diffusivity, replacing with NaN
16:20:51 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:51 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:51 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:51 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:51 INFO opendrift:2144: 2026-02-11 01:49:16.327868 - step 68 of 96 - 1553 active elements (1447 deactivated)
16:20:51 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:51 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:52 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:52 INFO opendrift:2144: 2026-02-11 02:19:16.327868 - step 69 of 96 - 1547 active elements (1453 deactivated)
16:20:54 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.014939769 to -0.0011529252) found for ocean_vertical_diffusivity, replacing with NaN
16:20:54 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:54 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:54 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:54 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:54 INFO opendrift:2144: 2026-02-11 02:49:16.327868 - step 70 of 96 - 1540 active elements (1460 deactivated)
16:20:54 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:54 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:54 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:54 INFO opendrift:2144: 2026-02-11 03:19:16.327868 - step 71 of 96 - 1535 active elements (1465 deactivated)
16:20:56 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.023090757 to -0.0015442405) found for ocean_vertical_diffusivity, replacing with NaN
16:20:56 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:56 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:56 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:56 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:56 INFO opendrift:2144: 2026-02-11 03:49:16.327868 - step 72 of 96 - 1532 active elements (1468 deactivated)
16:20:56 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:56 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:56 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:56 INFO opendrift:2144: 2026-02-11 04:19:16.327868 - step 73 of 96 - 1523 active elements (1477 deactivated)
16:20:59 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.020595716 to -0.0014688596) found for ocean_vertical_diffusivity, replacing with NaN
16:20:59 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:20:59 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:59 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:59 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:59 INFO opendrift:2144: 2026-02-11 04:49:16.327868 - step 74 of 96 - 1510 active elements (1490 deactivated)
16:20:59 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:59 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:20:59 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:20:59 INFO opendrift:2144: 2026-02-11 05:19:16.327868 - step 75 of 96 - 1503 active elements (1497 deactivated)
16:21:01 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.0137711335 to -0.0017635737) found for ocean_vertical_diffusivity, replacing with NaN
16:21:01 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:21:01 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:01 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:01 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:01 INFO opendrift:2144: 2026-02-11 05:49:16.327868 - step 76 of 96 - 1496 active elements (1504 deactivated)
16:21:01 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:01 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:01 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:01 INFO opendrift:2144: 2026-02-11 06:19:16.327868 - step 77 of 96 - 1491 active elements (1509 deactivated)
16:21:03 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.01517508 to -0.0011584616) found for ocean_vertical_diffusivity, replacing with NaN
16:21:03 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:21:03 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:03 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:03 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:03 INFO opendrift:2144: 2026-02-11 06:49:16.327868 - step 78 of 96 - 1483 active elements (1517 deactivated)
16:21:03 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:03 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:03 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:03 INFO opendrift:2144: 2026-02-11 07:19:16.327868 - step 79 of 96 - 1477 active elements (1523 deactivated)
16:21:06 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.0074027115 to -0.00080947543) found for ocean_vertical_diffusivity, replacing with NaN
16:21:06 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:21:06 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:06 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:06 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:06 INFO opendrift:2144: 2026-02-11 07:49:16.327868 - step 80 of 96 - 1468 active elements (1532 deactivated)
16:21:06 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:06 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:06 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:06 INFO opendrift:2144: 2026-02-11 08:19:16.327868 - step 81 of 96 - 1462 active elements (1538 deactivated)
16:21:09 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.0070011206 to -0.00072138733) found for ocean_vertical_diffusivity, replacing with NaN
16:21:09 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:21:09 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:09 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:09 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:09 INFO opendrift:2144: 2026-02-11 08:49:16.327868 - step 82 of 96 - 1452 active elements (1548 deactivated)
16:21:09 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:09 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:09 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:09 INFO opendrift:2144: 2026-02-11 09:19:16.327868 - step 83 of 96 - 1439 active elements (1561 deactivated)
16:21:11 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.013116306 to -0.0010254419) found for ocean_vertical_diffusivity, replacing with NaN
16:21:11 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:21:11 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:11 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:11 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:11 INFO opendrift:2144: 2026-02-11 09:49:16.327868 - step 84 of 96 - 1425 active elements (1575 deactivated)
16:21:11 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:11 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:11 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:11 INFO opendrift:2144: 2026-02-11 10:19:16.327868 - step 85 of 96 - 1403 active elements (1597 deactivated)
16:21:13 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.0154412305 to -0.0008866193) found for ocean_vertical_diffusivity, replacing with NaN
16:21:13 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:21:13 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:13 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:13 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:13 INFO opendrift:2144: 2026-02-11 10:49:16.327868 - step 86 of 96 - 1385 active elements (1615 deactivated)
16:21:13 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:13 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:13 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:13 INFO opendrift:2144: 2026-02-11 11:19:16.327868 - step 87 of 96 - 1366 active elements (1634 deactivated)
16:21:16 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.012430822 to -0.0009870382) found for ocean_vertical_diffusivity, replacing with NaN
16:21:16 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:21:16 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:16 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:16 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:16 INFO opendrift:2144: 2026-02-11 11:49:16.327868 - step 88 of 96 - 1335 active elements (1665 deactivated)
16:21:16 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:16 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:16 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:16 INFO opendrift:2144: 2026-02-11 12:19:16.327868 - step 89 of 96 - 1313 active elements (1687 deactivated)
16:21:18 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.012979843 to -0.0011146222) found for ocean_vertical_diffusivity, replacing with NaN
16:21:18 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:21:18 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:18 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:18 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:18 INFO opendrift:2144: 2026-02-11 12:49:16.327868 - step 90 of 96 - 1295 active elements (1705 deactivated)
16:21:18 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:18 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:18 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:18 INFO opendrift:2144: 2026-02-11 13:19:16.327868 - step 91 of 96 - 1276 active elements (1724 deactivated)
16:21:20 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.015792632 to -0.0013178099) found for ocean_vertical_diffusivity, replacing with NaN
16:21:20 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:21:20 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:20 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:21 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:21 INFO opendrift:2144: 2026-02-11 13:49:16.327868 - step 92 of 96 - 1254 active elements (1746 deactivated)
16:21:21 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:21 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:21 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:21 INFO opendrift:2144: 2026-02-11 14:19:16.327868 - step 93 of 96 - 1224 active elements (1776 deactivated)
16:21:23 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.021336196 to -0.001101801) found for ocean_vertical_diffusivity, replacing with NaN
16:21:23 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:21:23 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:23 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:23 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:23 INFO opendrift:2144: 2026-02-11 14:49:16.327868 - step 94 of 96 - 1205 active elements (1795 deactivated)
16:21:23 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:23 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:23 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:23 INFO opendrift:2144: 2026-02-11 15:19:16.327868 - step 95 of 96 - 1183 active elements (1817 deactivated)
16:21:25 WARNING opendrift.readers.basereader.variables:656: Invalid values (-0.025339028 to -0.0013707194) found for ocean_vertical_diffusivity, replacing with NaN
16:21:25 WARNING opendrift.readers.basereader.variables:659: (allowed range: [0, 1])
16:21:25 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:25 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:25 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
16:21:25 INFO opendrift:2144: 2026-02-11 15:49:16.327868 - step 96 of 96 - 1171 active elements (1829 deactivated)
16:21:25 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:25 WARNING opendrift.readers.interpolation.interpolators:118: Only NaNs input to linearNDFast - returning
16:21:25 INFO opendrift.models.openoil.openoil:1192: Ice concentration above 30%, using Nordam scheme for advection in ice
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
0:00:01.6 total
0:00:00.0 preparing
0:00:01.6 reading
0:00:00.0 masking
--------------------
https://thredds.met.no/thredds/dodsC/fou-hi/barents_eps_zdepth_be
0:01:50.1 total
0:00:00.0 preparing
0:01:49.4 reading
0:00:01.0 interpolation
0:00:00.1 interpolation_time
0:00:00.7 rotating vectors
0:00:00.0 masking
--------------------
Performance:
2:09.7 total time
4.5 configuration
0.0 preparing main loop
0.0 moving elements to ocean
2:05.1 main loop
4.9 updating elements
0.0 oil weathering
0.0 updating viscosities
0.0 updating densities
4.5 vertical mixing
0.0 cleaning up
--------------------
===========================
Model: OpenOil (OpenDrift version 1.14.8)
1150 active Oil particles (1850 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: 2026-02-09 16:19:16.327868 UTC
Present: 2026-02-11 16:19:16.327868 UTC
Calculation steps: 96 * 0:30:00 - total time: 2 days, 0:00:00
Output steps: 49 * 1:00:00
===========================
16:21:34 INFO opendrift:4702: Saving animation to /root/project/docs/source/gallery/animations/example_oil_ice_0.gif...
16:22:07 INFO opendrift:3128: Time to make animation: 0:00:41.687952
o.plot(background='sea_ice_area_fraction', cmap=cmocean.cm.ice,
vmin=0, vmax=1, bgalpha=1, fast=False)
(<GeoAxes: title={'center': 'OpenDrift - OpenOil (GENERIC BUNKER C)\n2026-02-09 16:19 to 2026-02-11 16:19 UTC (49 steps)'}>, <Figure size 601.959x1100 with 2 Axes>)
Total running time of the script: (3 minutes 8.394 seconds)