Ensemble

from datetime import timedelta
import numpy as np
from opendrift.models.oceandrift import OceanDrift
from opendrift.readers import reader_netCDF_CF_generic

Drift simulation using 30 member ensemble wind data from MEPS model of MET Norway

o = OceanDrift(loglevel=20)
o.set_config('drift:vertical_mixing', False)
r = reader_netCDF_CF_generic.Reader('https://thredds.met.no/thredds/dodsC/mepslatest/meps_lagged_6_h_latest_2_5km_latest.nc')
o.add_reader(r)

o.seed_elements(lat=60, lon=4.9, time=r.start_time,
                radius=1000, number=10000)

o.run(duration=timedelta(hours=50), time_step=600, time_step_output=3600)

15:35:30 INFO    opendrift:569: OpenDriftSimulation initialised (version 1.14.11 / v1.14.12-32-g22db1c0)
15:35:30 INFO    opendrift.readers:67: Opening file with xr.open_dataset
15:35:31 INFO    opendrift.readers.reader_netCDF_CF_generic:340: Detected dimensions: {'time': 'time', 'x': 'x', 'y': 'y'}
15:35:31 INFO    opendrift.models.basemodel.environment:203: Adding a global landmask from GSHHG
15:35:37 INFO    opendrift.models.basemodel.environment:227: Fallback values will be used for the following variables which have no readers:
15:35:37 INFO    opendrift.models.basemodel.environment:230:    x_sea_water_velocity: 0.000000
15:35:37 INFO    opendrift.models.basemodel.environment:230:    y_sea_water_velocity: 0.000000
15:35:37 INFO    opendrift.models.basemodel.environment:230:    sea_surface_height: 0.000000
15:35:37 INFO    opendrift.models.basemodel.environment:230:    upward_sea_water_velocity: 0.000000
15:35:37 INFO    opendrift.models.basemodel.environment:230:    ocean_vertical_diffusivity: 0.000000
15:35:37 INFO    opendrift.models.basemodel.environment:230:    horizontal_diffusivity: 0.000000
15:35:37 INFO    opendrift.models.basemodel.environment:230:    sea_surface_wave_significant_height: 0.000000
15:35:37 INFO    opendrift.models.basemodel.environment:230:    sea_surface_wave_stokes_drift_x_velocity: 0.000000
15:35:37 INFO    opendrift.models.basemodel.environment:230:    sea_surface_wave_stokes_drift_y_velocity: 0.000000
15:35:37 INFO    opendrift.models.basemodel.environment:230:    ocean_mixed_layer_thickness: 50.000000
15:35:37 INFO    opendrift.models.basemodel.environment:230:    sea_floor_depth_below_sea_level: 10000.000000
15:35:37 INFO    opendrift:1910: Skipping environment variable ocean_vertical_diffusivity because of condition ['drift:vertical_mixing', 'is', False]
15:35:37 INFO    opendrift:1910: Skipping environment variable ocean_mixed_layer_thickness because of condition ['drift:vertical_mixing', 'is', False]
15:35:37 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']))
15:35:37 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']))
15:35:37 INFO    opendrift:1929: Storing previous values of environment variable sea_surface_height because of condition ['drift:vertical_advection', 'is', True]
15:35:37 INFO    opendrift:958: Using existing reader for land_binary_mask to move elements to ocean
15:35:37 INFO    opendrift:989: All points are in ocean
15:35:37 INFO    opendrift:2237: 2026-10-05 13:00:00 - step 1 of 300 - 10000 active elements (0 deactivated)
15:35:37 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:37 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:37 INFO    opendrift:2237: 2026-10-05 13:10:00 - step 2 of 300 - 10000 active elements (0 deactivated)
15:35:38 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:38 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:38 INFO    opendrift:2237: 2026-10-05 13:20:00 - step 3 of 300 - 10000 active elements (0 deactivated)
15:35:38 INFO    opendrift:2237: 2026-10-05 13:30:00 - step 4 of 300 - 10000 active elements (0 deactivated)
15:35:38 INFO    opendrift:2237: 2026-10-05 13:40:00 - step 5 of 300 - 10000 active elements (0 deactivated)
15:35:38 INFO    opendrift:2237: 2026-10-05 13:50:00 - step 6 of 300 - 10000 active elements (0 deactivated)
15:35:38 INFO    opendrift:2237: 2026-10-05 14:00:00 - step 7 of 300 - 10000 active elements (0 deactivated)
15:35:39 INFO    opendrift:2237: 2026-10-05 14:10:00 - step 8 of 300 - 10000 active elements (0 deactivated)
15:35:39 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:39 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:39 INFO    opendrift:2237: 2026-10-05 14:20:00 - step 9 of 300 - 10000 active elements (0 deactivated)
15:35:39 INFO    opendrift:2237: 2026-10-05 14:30:00 - step 10 of 300 - 10000 active elements (0 deactivated)
15:35:39 INFO    opendrift:2237: 2026-10-05 14:40:00 - step 11 of 300 - 10000 active elements (0 deactivated)
15:35:39 INFO    opendrift:2237: 2026-10-05 14:50:00 - step 12 of 300 - 10000 active elements (0 deactivated)
15:35:40 INFO    opendrift:2237: 2026-10-05 15:00:00 - step 13 of 300 - 10000 active elements (0 deactivated)
15:35:40 INFO    opendrift:2237: 2026-10-05 15:10:00 - step 14 of 300 - 10000 active elements (0 deactivated)
15:35:40 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:40 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:40 INFO    opendrift:2237: 2026-10-05 15:20:00 - step 15 of 300 - 10000 active elements (0 deactivated)
15:35:40 INFO    opendrift:2237: 2026-10-05 15:30:00 - step 16 of 300 - 10000 active elements (0 deactivated)
15:35:41 INFO    opendrift:2237: 2026-10-05 15:40:00 - step 17 of 300 - 10000 active elements (0 deactivated)
15:35:41 INFO    opendrift:2237: 2026-10-05 15:50:00 - step 18 of 300 - 9999 active elements (1 deactivated)
15:35:41 INFO    opendrift:2237: 2026-10-05 16:00:00 - step 19 of 300 - 9999 active elements (1 deactivated)
15:35:41 INFO    opendrift:2237: 2026-10-05 16:10:00 - step 20 of 300 - 9999 active elements (1 deactivated)
15:35:41 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:41 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:41 INFO    opendrift:2237: 2026-10-05 16:20:00 - step 21 of 300 - 9999 active elements (1 deactivated)
15:35:42 INFO    opendrift:2237: 2026-10-05 16:30:00 - step 22 of 300 - 9999 active elements (1 deactivated)
15:35:42 INFO    opendrift:2237: 2026-10-05 16:40:00 - step 23 of 300 - 9998 active elements (2 deactivated)
15:35:42 INFO    opendrift:2237: 2026-10-05 16:50:00 - step 24 of 300 - 9997 active elements (3 deactivated)
15:35:42 INFO    opendrift:2237: 2026-10-05 17:00:00 - step 25 of 300 - 9997 active elements (3 deactivated)
15:35:42 INFO    opendrift:2237: 2026-10-05 17:10:00 - step 26 of 300 - 9994 active elements (6 deactivated)
15:35:43 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:43 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:43 INFO    opendrift:2237: 2026-10-05 17:20:00 - step 27 of 300 - 9989 active elements (11 deactivated)
15:35:43 INFO    opendrift:2237: 2026-10-05 17:30:00 - step 28 of 300 - 9981 active elements (19 deactivated)
15:35:43 INFO    opendrift:2237: 2026-10-05 17:40:00 - step 29 of 300 - 9966 active elements (34 deactivated)
15:35:43 INFO    opendrift:2237: 2026-10-05 17:50:00 - step 30 of 300 - 9947 active elements (53 deactivated)
15:35:43 INFO    opendrift:2237: 2026-10-05 18:00:00 - step 31 of 300 - 9931 active elements (69 deactivated)
15:35:43 INFO    opendrift:2237: 2026-10-05 18:10:00 - step 32 of 300 - 9894 active elements (106 deactivated)
15:35:44 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:44 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:44 INFO    opendrift:2237: 2026-10-05 18:20:00 - step 33 of 300 - 9835 active elements (165 deactivated)
15:35:44 INFO    opendrift:2237: 2026-10-05 18:30:00 - step 34 of 300 - 9777 active elements (223 deactivated)
15:35:44 INFO    opendrift:2237: 2026-10-05 18:40:00 - step 35 of 300 - 9702 active elements (298 deactivated)
15:35:44 INFO    opendrift:2237: 2026-10-05 18:50:00 - step 36 of 300 - 9606 active elements (394 deactivated)
15:35:44 INFO    opendrift:2237: 2026-10-05 19:00:00 - step 37 of 300 - 9475 active elements (525 deactivated)
15:35:45 INFO    opendrift:2237: 2026-10-05 19:10:00 - step 38 of 300 - 9314 active elements (686 deactivated)
15:35:45 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:45 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:45 INFO    opendrift:2237: 2026-10-05 19:20:00 - step 39 of 300 - 9117 active elements (883 deactivated)
15:35:45 INFO    opendrift:2237: 2026-10-05 19:30:00 - step 40 of 300 - 8926 active elements (1074 deactivated)
15:35:45 INFO    opendrift:2237: 2026-10-05 19:40:00 - step 41 of 300 - 8679 active elements (1321 deactivated)
15:35:46 INFO    opendrift:2237: 2026-10-05 19:50:00 - step 42 of 300 - 8403 active elements (1597 deactivated)
15:35:46 INFO    opendrift:2237: 2026-10-05 20:00:00 - step 43 of 300 - 8091 active elements (1909 deactivated)
15:35:46 INFO    opendrift:2237: 2026-10-05 20:10:00 - step 44 of 300 - 7738 active elements (2262 deactivated)
15:35:46 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:46 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:46 INFO    opendrift:2237: 2026-10-05 20:20:00 - step 45 of 300 - 7343 active elements (2657 deactivated)
15:35:47 INFO    opendrift:2237: 2026-10-05 20:30:00 - step 46 of 300 - 7004 active elements (2996 deactivated)
15:35:47 INFO    opendrift:2237: 2026-10-05 20:40:00 - step 47 of 300 - 6599 active elements (3401 deactivated)
15:35:47 INFO    opendrift:2237: 2026-10-05 20:50:00 - step 48 of 300 - 6193 active elements (3807 deactivated)
15:35:47 INFO    opendrift:2237: 2026-10-05 21:00:00 - step 49 of 300 - 5797 active elements (4203 deactivated)
15:35:47 INFO    opendrift:2237: 2026-10-05 21:10:00 - step 50 of 300 - 5418 active elements (4582 deactivated)
15:35:48 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:48 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:48 INFO    opendrift:2237: 2026-10-05 21:20:00 - step 51 of 300 - 5092 active elements (4908 deactivated)
15:35:48 INFO    opendrift:2237: 2026-10-05 21:30:00 - step 52 of 300 - 4758 active elements (5242 deactivated)
15:35:48 INFO    opendrift:2237: 2026-10-05 21:40:00 - step 53 of 300 - 4437 active elements (5563 deactivated)
15:35:48 INFO    opendrift:2237: 2026-10-05 21:50:00 - step 54 of 300 - 4122 active elements (5878 deactivated)
15:35:48 INFO    opendrift:2237: 2026-10-05 22:00:00 - step 55 of 300 - 3848 active elements (6152 deactivated)
15:35:48 INFO    opendrift:2237: 2026-10-05 22:10:00 - step 56 of 300 - 3616 active elements (6384 deactivated)
15:35:49 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:49 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:49 INFO    opendrift:2237: 2026-10-05 22:20:00 - step 57 of 300 - 3343 active elements (6657 deactivated)
15:35:49 INFO    opendrift:2237: 2026-10-05 22:30:00 - step 58 of 300 - 3129 active elements (6871 deactivated)
15:35:49 INFO    opendrift:2237: 2026-10-05 22:40:00 - step 59 of 300 - 2943 active elements (7057 deactivated)
15:35:49 INFO    opendrift:2237: 2026-10-05 22:50:00 - step 60 of 300 - 2780 active elements (7220 deactivated)
15:35:49 INFO    opendrift:2237: 2026-10-05 23:00:00 - step 61 of 300 - 2605 active elements (7395 deactivated)
15:35:49 INFO    opendrift:2237: 2026-10-05 23:10:00 - step 62 of 300 - 2440 active elements (7560 deactivated)
15:35:50 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:50 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:50 INFO    opendrift:2237: 2026-10-05 23:20:00 - step 63 of 300 - 2292 active elements (7708 deactivated)
15:35:50 INFO    opendrift:2237: 2026-10-05 23:30:00 - step 64 of 300 - 2129 active elements (7871 deactivated)
15:35:50 INFO    opendrift:2237: 2026-10-05 23:40:00 - step 65 of 300 - 1971 active elements (8029 deactivated)
15:35:50 INFO    opendrift:2237: 2026-10-05 23:50:00 - step 66 of 300 - 1801 active elements (8199 deactivated)
15:35:50 INFO    opendrift:2237: 2026-10-06 00:00:00 - step 67 of 300 - 1618 active elements (8382 deactivated)
15:35:50 INFO    opendrift:2237: 2026-10-06 00:10:00 - step 68 of 300 - 1463 active elements (8537 deactivated)
15:35:50 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:50 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:50 INFO    opendrift:2237: 2026-10-06 00:20:00 - step 69 of 300 - 1313 active elements (8687 deactivated)
15:35:50 INFO    opendrift:2237: 2026-10-06 00:30:00 - step 70 of 300 - 1161 active elements (8839 deactivated)
15:35:51 INFO    opendrift:2237: 2026-10-06 00:40:00 - step 71 of 300 - 1013 active elements (8987 deactivated)
15:35:51 INFO    opendrift:2237: 2026-10-06 00:50:00 - step 72 of 300 - 857 active elements (9143 deactivated)
15:35:51 INFO    opendrift:2237: 2026-10-06 01:00:00 - step 73 of 300 - 726 active elements (9274 deactivated)
15:35:51 INFO    opendrift:2237: 2026-10-06 01:10:00 - step 74 of 300 - 615 active elements (9385 deactivated)
15:35:51 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:51 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:51 INFO    opendrift:2237: 2026-10-06 01:20:00 - step 75 of 300 - 510 active elements (9490 deactivated)
15:35:51 INFO    opendrift:2237: 2026-10-06 01:30:00 - step 76 of 300 - 405 active elements (9595 deactivated)
15:35:51 INFO    opendrift:2237: 2026-10-06 01:40:00 - step 77 of 300 - 333 active elements (9667 deactivated)
15:35:51 INFO    opendrift:2237: 2026-10-06 01:50:00 - step 78 of 300 - 260 active elements (9740 deactivated)
15:35:51 INFO    opendrift:2237: 2026-10-06 02:00:00 - step 79 of 300 - 206 active elements (9794 deactivated)
15:35:51 INFO    opendrift:2237: 2026-10-06 02:10:00 - step 80 of 300 - 159 active elements (9841 deactivated)
15:35:52 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:52 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:52 INFO    opendrift:2237: 2026-10-06 02:20:00 - step 81 of 300 - 123 active elements (9877 deactivated)
15:35:52 INFO    opendrift:2237: 2026-10-06 02:30:00 - step 82 of 300 - 96 active elements (9904 deactivated)
15:35:52 INFO    opendrift:2237: 2026-10-06 02:40:00 - step 83 of 300 - 74 active elements (9926 deactivated)
15:35:52 INFO    opendrift:2237: 2026-10-06 02:50:00 - step 84 of 300 - 63 active elements (9937 deactivated)
15:35:52 INFO    opendrift:2237: 2026-10-06 03:00:00 - step 85 of 300 - 57 active elements (9943 deactivated)
15:35:52 INFO    opendrift:2237: 2026-10-06 03:10:00 - step 86 of 300 - 46 active elements (9954 deactivated)
15:35:52 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:52 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:52 INFO    opendrift:2237: 2026-10-06 03:20:00 - step 87 of 300 - 39 active elements (9961 deactivated)
15:35:52 INFO    opendrift:2237: 2026-10-06 03:30:00 - step 88 of 300 - 32 active elements (9968 deactivated)
15:35:52 INFO    opendrift:2237: 2026-10-06 03:40:00 - step 89 of 300 - 30 active elements (9970 deactivated)
15:35:52 INFO    opendrift:2237: 2026-10-06 03:50:00 - step 90 of 300 - 28 active elements (9972 deactivated)
15:35:52 INFO    opendrift:2237: 2026-10-06 04:00:00 - step 91 of 300 - 28 active elements (9972 deactivated)
15:35:52 INFO    opendrift:2237: 2026-10-06 04:10:00 - step 92 of 300 - 26 active elements (9974 deactivated)
15:35:53 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:53 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:53 INFO    opendrift:2237: 2026-10-06 04:20:00 - step 93 of 300 - 24 active elements (9976 deactivated)
15:35:53 INFO    opendrift:2237: 2026-10-06 04:30:00 - step 94 of 300 - 23 active elements (9977 deactivated)
15:35:53 INFO    opendrift:2237: 2026-10-06 04:40:00 - step 95 of 300 - 23 active elements (9977 deactivated)
15:35:53 INFO    opendrift:2237: 2026-10-06 04:50:00 - step 96 of 300 - 20 active elements (9980 deactivated)
15:35:53 INFO    opendrift:2237: 2026-10-06 05:00:00 - step 97 of 300 - 20 active elements (9980 deactivated)
15:35:53 INFO    opendrift:2237: 2026-10-06 05:10:00 - step 98 of 300 - 19 active elements (9981 deactivated)
15:35:53 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:53 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:53 INFO    opendrift:2237: 2026-10-06 05:20:00 - step 99 of 300 - 18 active elements (9982 deactivated)
15:35:53 INFO    opendrift:2237: 2026-10-06 05:30:00 - step 100 of 300 - 16 active elements (9984 deactivated)
15:35:53 INFO    opendrift:2237: 2026-10-06 05:40:00 - step 101 of 300 - 14 active elements (9986 deactivated)
15:35:53 INFO    opendrift:2237: 2026-10-06 05:50:00 - step 102 of 300 - 12 active elements (9988 deactivated)
15:35:53 INFO    opendrift:2237: 2026-10-06 06:00:00 - step 103 of 300 - 10 active elements (9990 deactivated)
15:35:53 INFO    opendrift:2237: 2026-10-06 06:10:00 - step 104 of 300 - 9 active elements (9991 deactivated)
15:35:54 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:54 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:54 INFO    opendrift:2237: 2026-10-06 06:20:00 - step 105 of 300 - 9 active elements (9991 deactivated)
15:35:54 INFO    opendrift:2237: 2026-10-06 06:30:00 - step 106 of 300 - 9 active elements (9991 deactivated)
15:35:54 INFO    opendrift:2237: 2026-10-06 06:40:00 - step 107 of 300 - 9 active elements (9991 deactivated)
15:35:54 INFO    opendrift:2237: 2026-10-06 06:50:00 - step 108 of 300 - 7 active elements (9993 deactivated)
15:35:54 INFO    opendrift:2237: 2026-10-06 07:00:00 - step 109 of 300 - 7 active elements (9993 deactivated)
15:35:54 INFO    opendrift:2237: 2026-10-06 07:10:00 - step 110 of 300 - 6 active elements (9994 deactivated)
15:35:54 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:54 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:54 INFO    opendrift:2237: 2026-10-06 07:20:00 - step 111 of 300 - 5 active elements (9995 deactivated)
15:35:54 INFO    opendrift:2237: 2026-10-06 07:30:00 - step 112 of 300 - 4 active elements (9996 deactivated)
15:35:54 INFO    opendrift:2237: 2026-10-06 07:40:00 - step 113 of 300 - 4 active elements (9996 deactivated)
15:35:54 INFO    opendrift:2237: 2026-10-06 07:50:00 - step 114 of 300 - 2 active elements (9998 deactivated)
15:35:54 INFO    opendrift:2237: 2026-10-06 08:00:00 - step 115 of 300 - 2 active elements (9998 deactivated)
15:35:54 INFO    opendrift:2237: 2026-10-06 08:10:00 - step 116 of 300 - 2 active elements (9998 deactivated)
15:35:55 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:55 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:55 INFO    opendrift:2237: 2026-10-06 08:20:00 - step 117 of 300 - 2 active elements (9998 deactivated)
15:35:55 INFO    opendrift:2237: 2026-10-06 08:30:00 - step 118 of 300 - 2 active elements (9998 deactivated)
15:35:55 INFO    opendrift:2237: 2026-10-06 08:40:00 - step 119 of 300 - 2 active elements (9998 deactivated)
15:35:55 INFO    opendrift:2237: 2026-10-06 08:50:00 - step 120 of 300 - 2 active elements (9998 deactivated)
15:35:55 INFO    opendrift:2237: 2026-10-06 09:00:00 - step 121 of 300 - 2 active elements (9998 deactivated)
15:35:55 INFO    opendrift:2237: 2026-10-06 09:10:00 - step 122 of 300 - 2 active elements (9998 deactivated)
15:35:55 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:55 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:55 INFO    opendrift:2237: 2026-10-06 09:20:00 - step 123 of 300 - 2 active elements (9998 deactivated)
15:35:55 INFO    opendrift:2237: 2026-10-06 09:30:00 - step 124 of 300 - 2 active elements (9998 deactivated)
15:35:55 INFO    opendrift:2237: 2026-10-06 09:40:00 - step 125 of 300 - 2 active elements (9998 deactivated)
15:35:55 INFO    opendrift:2237: 2026-10-06 09:50:00 - step 126 of 300 - 2 active elements (9998 deactivated)
15:35:55 INFO    opendrift:2237: 2026-10-06 10:00:00 - step 127 of 300 - 2 active elements (9998 deactivated)
15:35:55 INFO    opendrift:2237: 2026-10-06 10:10:00 - step 128 of 300 - 2 active elements (9998 deactivated)
15:35:55 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:55 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:55 INFO    opendrift:2237: 2026-10-06 10:20:00 - step 129 of 300 - 2 active elements (9998 deactivated)
15:35:55 INFO    opendrift:2237: 2026-10-06 10:30:00 - step 130 of 300 - 2 active elements (9998 deactivated)
15:35:55 INFO    opendrift:2237: 2026-10-06 10:40:00 - step 131 of 300 - 2 active elements (9998 deactivated)
15:35:55 INFO    opendrift:2237: 2026-10-06 10:50:00 - step 132 of 300 - 2 active elements (9998 deactivated)
15:35:55 INFO    opendrift:2237: 2026-10-06 11:00:00 - step 133 of 300 - 2 active elements (9998 deactivated)
15:35:55 INFO    opendrift:2237: 2026-10-06 11:10:00 - step 134 of 300 - 2 active elements (9998 deactivated)
15:35:56 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:56 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:56 INFO    opendrift:2237: 2026-10-06 11:20:00 - step 135 of 300 - 2 active elements (9998 deactivated)
15:35:56 INFO    opendrift:2237: 2026-10-06 11:30:00 - step 136 of 300 - 2 active elements (9998 deactivated)
15:35:56 INFO    opendrift:2237: 2026-10-06 11:40:00 - step 137 of 300 - 2 active elements (9998 deactivated)
15:35:56 INFO    opendrift:2237: 2026-10-06 11:50:00 - step 138 of 300 - 2 active elements (9998 deactivated)
15:35:56 INFO    opendrift:2237: 2026-10-06 12:00:00 - step 139 of 300 - 2 active elements (9998 deactivated)
15:35:56 INFO    opendrift:2237: 2026-10-06 12:10:00 - step 140 of 300 - 2 active elements (9998 deactivated)
15:35:56 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:56 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:56 INFO    opendrift:2237: 2026-10-06 12:20:00 - step 141 of 300 - 2 active elements (9998 deactivated)
15:35:56 INFO    opendrift:2237: 2026-10-06 12:30:00 - step 142 of 300 - 1 active elements (9999 deactivated)
15:35:56 INFO    opendrift:2237: 2026-10-06 12:40:00 - step 143 of 300 - 1 active elements (9999 deactivated)
15:35:56 INFO    opendrift:2237: 2026-10-06 12:50:00 - step 144 of 300 - 1 active elements (9999 deactivated)
15:35:56 INFO    opendrift:2237: 2026-10-06 13:00:00 - step 145 of 300 - 1 active elements (9999 deactivated)
15:35:56 INFO    opendrift:2237: 2026-10-06 13:10:00 - step 146 of 300 - 1 active elements (9999 deactivated)
15:35:57 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:57 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:57 INFO    opendrift:2237: 2026-10-06 13:20:00 - step 147 of 300 - 1 active elements (9999 deactivated)
15:35:57 INFO    opendrift:2237: 2026-10-06 13:30:00 - step 148 of 300 - 1 active elements (9999 deactivated)
15:35:57 INFO    opendrift:2237: 2026-10-06 13:40:00 - step 149 of 300 - 1 active elements (9999 deactivated)
15:35:57 INFO    opendrift:2237: 2026-10-06 13:50:00 - step 150 of 300 - 1 active elements (9999 deactivated)
15:35:57 INFO    opendrift:2237: 2026-10-06 14:00:00 - step 151 of 300 - 1 active elements (9999 deactivated)
15:35:57 INFO    opendrift:2237: 2026-10-06 14:10:00 - step 152 of 300 - 1 active elements (9999 deactivated)
15:35:57 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:57 WARNING opendrift.readers.interpolation.structured:63: Ensemble data currently not extrapolated towards seafloor
15:35:57 INFO    opendrift:2237: 2026-10-06 14:20:00 - step 153 of 300 - 1 active elements (9999 deactivated)
15:35:57 INFO    opendrift:2237: 2026-10-06 14:30:00 - step 154 of 300 - 1 active elements (9999 deactivated)
15:35:57 WARNING opendrift:2313: The simulation stopped before requested end time was reached.
15:35:57 INFO    opendrift:2315: ========================
15:35:57 INFO    opendrift:2316: End of simulation:
15:35:57 INFO    opendrift:2317: No more active or scheduled elements, quitting.
15:35:57 INFO    opendrift:2318: Traceback (most recent call last):
  File "/root/project/opendrift/models/basemodel/__init__.py", line 2300, in run
    raise ValueError('No more active or scheduled elements, quitting.')
ValueError: No more active or scheduled elements, quitting.

15:35:57 INFO    opendrift:2319: 'The simulation stopped before requested end time was reached.'

15:35:57 INFO    opendrift:2322: ========================

<xarray.Dataset> Size: 23MB
Dimensions:                                   (trajectory: 10000, time: 26)
Coordinates:
  * trajectory                                (trajectory) int64 80kB 0 ... 9999
  * time                                      (time) datetime64[ns] 208B 2026...
Data variables: (12/22)
    status                                    (trajectory, time) float32 1MB ...
    moving                                    (trajectory, time) float32 1MB ...
    age_seconds                               (trajectory, time) float32 1MB ...
    origin_marker                             (trajectory, time) float32 1MB ...
    lon                                       (trajectory, time) float32 1MB ...
    lat                                       (trajectory, time) float32 1MB ...
    ...                                        ...
    horizontal_diffusivity                    (trajectory, time) float32 1MB ...
    sea_surface_wave_significant_height       (trajectory, time) float32 1MB ...
    sea_surface_wave_stokes_drift_x_velocity  (trajectory, time) float32 1MB ...
    sea_surface_wave_stokes_drift_y_velocity  (trajectory, time) float32 1MB ...
    sea_floor_depth_below_sea_level           (trajectory, time) float32 1MB ...
    land_binary_mask                          (trajectory, time) float32 1MB ...
Attributes: (12/121)
    Conventions:                                                           CF...
    standard_name_vocabulary:                                              CF...
    featureType:                                                           tr...
    title:                                                                 Op...
    summary:                                                               Ou...
    keywords:                                                              tr...
    ...                                                                    ...
    geospatial_lon_units:                                                  de...
    geospatial_lon_resolution:                                             point
    runtime:                                                               0:...
    geospatial_vertical_min:                                               0.0
    geospatial_vertical_max:                                               0.0
    geospatial_vertical_positive:                                          up

xarray.Dataset

• Dimensions:
  • trajectory: 10000
  • time: 26
• Coordinates: (2)
  • trajectory
    (trajectory)
    int64
    0 1 2 3 4 ... 9996 9997 9998 9999

    cf_role :

    trajectory_id

    dtype :

    <class 'numpy.int32'>

    array([   0,    1,    2, ..., 9997, 9998, 9999], shape=(10000,))

  • time
    (time)
    datetime64[ns]
    2026-10-05T13:00:00 ... 2026-10-...

    standard_name :

    time

    long_name :

    time

    dtype :

    <class 'numpy.float64'>

    array(['2026-10-05T13:00:00.000000000', '2026-10-05T14:00:00.000000000',
           '2026-10-05T15:00:00.000000000', '2026-10-05T16:00:00.000000000',
           '2026-10-05T17:00:00.000000000', '2026-10-05T18:00:00.000000000',
           '2026-10-05T19:00:00.000000000', '2026-10-05T20:00:00.000000000',
           '2026-10-05T21:00:00.000000000', '2026-10-05T22:00:00.000000000',
           '2026-10-05T23:00:00.000000000', '2026-10-06T00:00:00.000000000',
           '2026-10-06T01:00:00.000000000', '2026-10-06T02:00:00.000000000',
           '2026-10-06T03:00:00.000000000', '2026-10-06T04:00:00.000000000',
           '2026-10-06T05:00:00.000000000', '2026-10-06T06:00:00.000000000',
           '2026-10-06T07:00:00.000000000', '2026-10-06T08:00:00.000000000',
           '2026-10-06T09:00:00.000000000', '2026-10-06T10:00:00.000000000',
           '2026-10-06T11:00:00.000000000', '2026-10-06T12:00:00.000000000',
           '2026-10-06T13:00:00.000000000', '2026-10-06T14:00:00.000000000'],
          dtype='datetime64[ns]')

• Data variables: (22)
  • status
    (trajectory, time)
    float32
    0.0 0.0 0.0 0.0 ... nan nan nan nan

    dtype :

    <class 'numpy.int32'>

    valid_range :

    [0 1]

    flag_values :

    [0 1]

    flag_meanings :

    active stranded

    array([[ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           ...,
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan]],
          shape=(10000, 26), dtype=float32)

  • moving
    (trajectory, time)
    float32
    1.0 1.0 1.0 1.0 ... nan nan nan nan

    dtype :

    <class 'numpy.int32'>

    minval :

    0

    maxval :

    1

    array([[ 1.,  1.,  1., ..., nan, nan, nan],
           [ 1.,  1.,  1., ..., nan, nan, nan],
           [ 1.,  1.,  1., ..., nan, nan, nan],
           ...,
           [ 1.,  1.,  1., ..., nan, nan, nan],
           [ 1.,  1.,  1., ..., nan, nan, nan],
           [ 1.,  1.,  1., ..., nan, nan, nan]],
          shape=(10000, 26), dtype=float32)

  • age_seconds
    (trajectory, time)
    float32
    0.0 3.6e+03 7.2e+03 ... nan nan nan

    dtype :

    <class 'numpy.float32'>

    units :

    s

    minval :

    0.0

    maxval :

    91800.0

    array([[   0., 3600., 7200., ...,   nan,   nan,   nan],
           [   0., 3600., 7200., ...,   nan,   nan,   nan],
           [   0., 3600., 7200., ...,   nan,   nan,   nan],
           ...,
           [   0., 3600., 7200., ...,   nan,   nan,   nan],
           [   0., 3600., 7200., ...,   nan,   nan,   nan],
           [   0., 3600., 7200., ...,   nan,   nan,   nan]],
          shape=(10000, 26), dtype=float32)

  • origin_marker
    (trajectory, time)
    float32
    0.0 0.0 0.0 0.0 ... nan nan nan nan

    dtype :

    <class 'numpy.int32'>

    unit :

    description :

    An integer kept constant during the simulation. Different values may be used for different seedings, to separate elements during analysis. With GUI, only a single seeding is possible.

    flag_values :

    [0]

    flag_meanings :

    Seed_0

    minval :

    0

    maxval :

    0

    array([[ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           ...,
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan]],
          shape=(10000, 26), dtype=float32)

  • lon
    (trajectory, time)
    float32
    4.932 4.945 4.959 ... nan nan nan

    dtype :

    <class 'numpy.float32'>

    units :

    degrees_east

    standard_name :

    longitude

    long_name :

    longitude

    axis :

    X

    minval :

    4.832955

    maxval :

    5.201916

    array([[4.931612 , 4.944826 , 4.958929 , ...,       nan,       nan,
                  nan],
           [4.90717  , 4.921519 , 4.935699 , ...,       nan,       nan,
                  nan],
           [4.917548 , 4.9321156, 4.946279 , ...,       nan,       nan,
                  nan],
           ...,
           [4.9092627, 4.9249706, 4.938055 , ...,       nan,       nan,
                  nan],
           [4.8994102, 4.91299  , 4.926633 , ...,       nan,       nan,
                  nan],
           [4.9232616, 4.935077 , 4.949585 , ...,       nan,       nan,
                  nan]], shape=(10000, 26), dtype=float32)

  • lat
    (trajectory, time)
    float32
    60.0 60.0 60.0 ... nan nan nan

    dtype :

    <class 'numpy.float32'>

    units :

    degrees_north

    standard_name :

    latitude

    long_name :

    latitude

    axis :

    Y

    minval :

    59.960087

    maxval :

    60.04418

    array([[59.99818 , 60.001694, 60.003986, ...,       nan,       nan,
                  nan],
           [59.99252 , 59.995262, 59.998627, ...,       nan,       nan,
                  nan],
           [60.01556 , 60.01784 , 60.019424, ...,       nan,       nan,
                  nan],
           ...,
           [59.999485, 60.000713, 60.002224, ...,       nan,       nan,
                  nan],
           [59.990494, 59.993004, 59.995224, ...,       nan,       nan,
                  nan],
           [59.997066, 60.00109 , 60.003624, ...,       nan,       nan,
                  nan]], shape=(10000, 26), dtype=float32)

  • z
    (trajectory, time)
    float32
    0.0 0.0 0.0 0.0 ... nan nan nan nan

    dtype :

    <class 'numpy.float32'>

    units :

    m

    standard_name :

    z

    long_name :

    vertical position

    axis :

    Z

    positive :

    up

    minval :

    0.0

    maxval :

    0.0

    array([[ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           ...,
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan]],
          shape=(10000, 26), dtype=float32)

  • wind_drift_factor
    (trajectory, time)
    float32
    0.02 0.02 0.02 0.02 ... nan nan nan

    dtype :

    <class 'numpy.float32'>

    units :

    1

    description :

    Elements at surface are moved with this fraction of the vind vector, in addition to currents and Stokes drift

    minval :

    0.02

    maxval :

    0.02

    array([[0.02, 0.02, 0.02, ...,  nan,  nan,  nan],
           [0.02, 0.02, 0.02, ...,  nan,  nan,  nan],
           [0.02, 0.02, 0.02, ...,  nan,  nan,  nan],
           ...,
           [0.02, 0.02, 0.02, ...,  nan,  nan,  nan],
           [0.02, 0.02, 0.02, ...,  nan,  nan,  nan],
           [0.02, 0.02, 0.02, ...,  nan,  nan,  nan]],
          shape=(10000, 26), dtype=float32)

  • current_drift_factor
    (trajectory, time)
    float32
    1.0 1.0 1.0 1.0 ... nan nan nan nan

    dtype :

    <class 'numpy.float32'>

    units :

    1

    description :

    Elements are moved with this fraction of the current vector, in addition to currents and Stokes drift

    minval :

    1.0

    maxval :

    1.0

    array([[ 1.,  1.,  1., ..., nan, nan, nan],
           [ 1.,  1.,  1., ..., nan, nan, nan],
           [ 1.,  1.,  1., ..., nan, nan, nan],
           ...,
           [ 1.,  1.,  1., ..., nan, nan, nan],
           [ 1.,  1.,  1., ..., nan, nan, nan],
           [ 1.,  1.,  1., ..., nan, nan, nan]],
          shape=(10000, 26), dtype=float32)

  • terminal_velocity
    (trajectory, time)
    float32
    0.0 0.0 0.0 0.0 ... nan nan nan nan

    dtype :

    <class 'numpy.float32'>

    units :

    m/s

    description :

    Terminal rise/sinking velocity (buoyancy) in the ocean column

    minval :

    0.0

    maxval :

    0.0

    array([[ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           ...,
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan]],
          shape=(10000, 26), dtype=float32)

  • x_sea_water_velocity
    (trajectory, time)
    float32
    0.0 0.0 0.0 0.0 ... nan nan nan nan

    minval :

    0.0

    maxval :

    0.0

    array([[ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           ...,
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan]],
          shape=(10000, 26), dtype=float32)

  • y_sea_water_velocity
    (trajectory, time)
    float32
    0.0 0.0 0.0 0.0 ... nan nan nan nan

    minval :

    0.0

    maxval :

    0.0

    array([[ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           ...,
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan]],
          shape=(10000, 26), dtype=float32)

  • sea_surface_height
    (trajectory, time)
    float32
    0.0 0.0 0.0 0.0 ... nan nan nan nan

    minval :

    0.0

    maxval :

    0.0

    array([[ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           ...,
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan]],
          shape=(10000, 26), dtype=float32)

  • x_wind
    (trajectory, time)
    float32
    9.109 11.79 9.731 ... nan nan nan

    minval :

    5.801889

    maxval :

    13.806763

    array([[ 9.108723 , 11.788095 ,  9.730897 , ...,        nan,        nan,
                   nan],
           [10.719268 , 11.626197 , 10.104732 , ...,        nan,        nan,
                   nan],
           [11.145345 , 11.486443 , 10.239619 , ...,        nan,        nan,
                   nan],
           ...,
           [13.575078 , 10.181721 , 10.050977 , ...,        nan,        nan,
                   nan],
           [10.395361 , 10.669232 , 10.445139 , ...,        nan,        nan,
                   nan],
           [ 7.3795624, 11.658409 , 10.621179 , ...,        nan,        nan,
                   nan]], shape=(10000, 26), dtype=float32)

  • y_wind
    (trajectory, time)
    float32
    6.824 3.462 3.688 ... nan nan nan

    minval :

    -1.3340802

    maxval :

    8.83458

    array([[6.824094 , 3.4615912, 3.68806  , ...,       nan,       nan,
                  nan],
           [3.704697 , 5.0154414, 5.4781213, ...,       nan,       nan,
                  nan],
           [4.069324 , 2.7329855, 2.0592425, ...,       nan,       nan,
                  nan],
           ...,
           [1.9895446, 1.7462361, 3.1691694, ...,       nan,       nan,
                  nan],
           [3.8944652, 3.8737588, 2.8143792, ...,       nan,       nan,
                  nan],
           [7.3993726, 4.651635 , 2.8449848, ...,       nan,       nan,
                  nan]], shape=(10000, 26), dtype=float32)

  • upward_sea_water_velocity
    (trajectory, time)
    float32
    0.0 0.0 0.0 0.0 ... nan nan nan nan

    minval :

    0.0

    maxval :

    0.0

    array([[ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           ...,
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan]],
          shape=(10000, 26), dtype=float32)

  • horizontal_diffusivity
    (trajectory, time)
    float32
    0.0 0.0 0.0 0.0 ... nan nan nan nan

    minval :

    0.0

    maxval :

    0.0

    array([[ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           ...,
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan]],
          shape=(10000, 26), dtype=float32)

  • sea_surface_wave_significant_height
    (trajectory, time)
    float32
    3.187 3.713 2.664 ... nan nan nan

    minval :

    0.82988787

    maxval :

    4.85417

    array([[3.1866121, 3.7131686, 2.6639867, ...,       nan,       nan,
                  nan],
           [3.164236 , 3.9439478, 3.250039 , ...,       nan,       nan,
                  nan],
           [3.4631412, 3.4294262, 2.6836207, ...,       nan,       nan,
                  nan],
           ...,
           [4.630729 , 2.6252327, 2.7322178, ...,       nan,       nan,
                  nan],
           [3.0314677, 3.1694279, 2.8787324, ...,       nan,       nan,
                  nan],
           [2.686533 , 3.875883 , 2.9742231, ...,       nan,       nan,
                  nan]], shape=(10000, 26), dtype=float32)

  • sea_surface_wave_stokes_drift_x_velocity
    (trajectory, time)
    float32
    0.0 0.0 0.0 0.0 ... nan nan nan nan

    minval :

    0.0

    maxval :

    0.0

    array([[ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           ...,
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan]],
          shape=(10000, 26), dtype=float32)

  • sea_surface_wave_stokes_drift_y_velocity
    (trajectory, time)
    float32
    0.0 0.0 0.0 0.0 ... nan nan nan nan

    minval :

    0.0

    maxval :

    0.0

    array([[ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           ...,
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan]],
          shape=(10000, 26), dtype=float32)

  • sea_floor_depth_below_sea_level
    (trajectory, time)
    float32
    1e+04 1e+04 1e+04 ... nan nan nan

    minval :

    10000.0

    maxval :

    10000.0

    array([[10000., 10000., 10000., ...,    nan,    nan,    nan],
           [10000., 10000., 10000., ...,    nan,    nan,    nan],
           [10000., 10000., 10000., ...,    nan,    nan,    nan],
           ...,
           [10000., 10000., 10000., ...,    nan,    nan,    nan],
           [10000., 10000., 10000., ...,    nan,    nan,    nan],
           [10000., 10000., 10000., ...,    nan,    nan,    nan]],
          shape=(10000, 26), dtype=float32)

  • land_binary_mask
    (trajectory, time)
    float32
    0.0 0.0 0.0 0.0 ... nan nan nan nan

    minval :

    0.0

    maxval :

    0.0

    array([[ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           ...,
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan],
           [ 0.,  0.,  0., ..., nan, nan, nan]],
          shape=(10000, 26), dtype=float32)

• Attributes: (121)

  Conventions :

  CF-1.11, ACDD-1.3

  standard_name_vocabulary :

  CF Standard Name Table v85

  featureType :

  trajectory

  title :

  OpenDrift trajectory simulation

  summary :

  Output from simulation with OpenDrift framework

  keywords :

  trajectory, drift, lagrangian, simulation

  history :

  Created 2026-10-05 15:35:37.312010

  date_created :

  2026-10-05T15:35:37.312026

  source :

  Output from simulation with OpenDrift

  model_url :

  https://github.com/OpenDrift/opendrift

  opendrift_class :

  OceanDrift

  opendrift_module :

  opendrift.models.oceandrift

  readers :

  odict_keys(['https://thredds.met.no/thredds/dodsC/mepslatest/meps_lagged_6_h_latest_2_5km_latest.nc', 'global_landmask'])

  time_coverage_start :

  2026-10-05 13:00:00

  time_step_calculation :

  0:10:00

  time_step_output :

  1:00:00

  config_environment:constant:x_sea_water_velocity :

  None

  config_environment:fallback:x_sea_water_velocity :

  0

  config_environment:constant:y_sea_water_velocity :

  None

  config_environment:fallback:y_sea_water_velocity :

  0

  config_environment:constant:sea_surface_height :

  None

  config_environment:fallback:sea_surface_height :

  0

  config_environment:constant:x_wind :

  None

  config_environment:fallback:x_wind :

  0

  config_environment:constant:y_wind :

  None

  config_environment:fallback:y_wind :

  0

  config_environment:constant:upward_sea_water_velocity :

  None

  config_environment:fallback:upward_sea_water_velocity :

  0

  config_environment:constant:ocean_vertical_diffusivity :

  None

  config_environment:fallback:ocean_vertical_diffusivity :

  0

  config_environment:constant:horizontal_diffusivity :

  None

  config_environment:fallback:horizontal_diffusivity :

  0

  config_environment:constant:sea_surface_wave_significant_height :

  None

  config_environment:fallback:sea_surface_wave_significant_height :

  0

  config_environment:constant:sea_surface_wave_stokes_drift_x_velocity :

  None

  config_environment:fallback:sea_surface_wave_stokes_drift_x_velocity :

  0

  config_environment:constant:sea_surface_wave_stokes_drift_y_velocity :

  None

  config_environment:fallback:sea_surface_wave_stokes_drift_y_velocity :

  0

  config_environment:constant:ocean_mixed_layer_thickness :

  None

  config_environment:fallback:ocean_mixed_layer_thickness :

  50

  config_environment:constant:sea_floor_depth_below_sea_level :

  None

  config_environment:fallback:sea_floor_depth_below_sea_level :

  10000

  config_environment:constant:land_binary_mask :

  None

  config_environment:fallback:land_binary_mask :

  None

  config_general:use_auto_landmask :

  True

  config_drift:current_uncertainty :

  0

  config_drift:current_uncertainty_uniform :

  0

  config_drift:max_speed :

  2.0

  config_readers:max_number_of_fails :

  1

  config_general:simulation_name :

  config_general:coastline_action :

  stranding

  config_general:coastline_approximation_precision :

  0.001

  config_general:time_step_minutes :

  60

  config_general:time_step_output_minutes :

  None

  config_seed:ocean_only :

  True

  config_seed:number :

  1

  config_drift:max_age_seconds :

  None

  config_drift:advection_scheme :

  euler

  config_drift:profiles_depth :

  50

  config_drift:wind_uncertainty :

  0

  config_drift:relative_wind :

  False

  config_drift:deactivate_north_of :

  None

  config_drift:deactivate_south_of :

  None

  config_drift:deactivate_east_of :

  None

  config_drift:deactivate_west_of :

  None

  config_seed:origin_marker :

  0

  config_seed:z :

  0

  config_seed:wind_drift_factor :

  0.02

  config_seed:current_drift_factor :

  1

  config_seed:terminal_velocity :

  0.0

  config_drift:vertical_advection :

  True

  config_drift:vertical_advection_at_surface :

  False

  config_drift:water_column_stretching :

  False

  config_drift:vertical_advection_correction :

  False

  config_drift:vertical_mixing :

  False

  config_drift:vertical_mixing_at_surface :

  False

  config_vertical_mixing:timestep :

  60

  config_vertical_mixing:diffusivitymodel :

  environment

  config_vertical_mixing:background_diffusivity :

  1.2e-05

  config_vertical_mixing:TSprofiles :

  False

  config_drift:wind_drift_depth :

  0.1

  config_drift:stokes_drift :

  True

  config_drift:stokes_drift_profile :

  Phillips

  config_drift:use_tabularised_stokes_drift :

  False

  config_drift:tabularised_stokes_drift_fetch :

  25000

  config_general:seafloor_action :

  lift_to_seafloor

  config_drift:truncate_ocean_model_below_m :

  None

  config_seed:seafloor :

  False

  opendrift_version :

  1.14.11

  seed_geojson :

  {"features": [], "type": "FeatureCollection"}

  simulation_time :

  2026-10-05 15:35:37.322705

  reader_x_sea_water_velocity :

  0

  reader_y_sea_water_velocity :

  0

  reader_sea_surface_height :

  0

  reader_x_wind :

  ['https://thredds.met.no/thredds/dodsC/mepslatest/meps_lagged_6_h_latest_2_5km_latest.nc']

  reader_y_wind :

  ['https://thredds.met.no/thredds/dodsC/mepslatest/meps_lagged_6_h_latest_2_5km_latest.nc']

  reader_upward_sea_water_velocity :

  0

  reader_horizontal_diffusivity :

  0

  reader_sea_surface_wave_significant_height :

  0

  reader_sea_surface_wave_stokes_drift_x_velocity :

  0

  reader_sea_surface_wave_stokes_drift_y_velocity :

  0

  reader_sea_floor_depth_below_sea_level :

  10000

  reader_land_binary_mask :

  ['global_landmask']

  time_coverage_end :

  2026-10-06 14:30:00

  time_coverage_duration :

  P1DT1H30M0S

  time_coverage_resolution :

  P0DT0H10M0S

  performance :

  -------------------- Reader performance: -------------------- https://thredds.met.no/thredds/dodsC/mepslatest/meps_lagged_6_h_latest_2_5km_latest.nc 0:00:14.6 total 0:00:00.0 preparing 0:00:14.0 reading 0:00:03.8 interpolation 0:00:00.0 interpolation_time 0:00:00.6 rotating vectors 0:00:00.0 masking -------------------- global_landmask 0:00:00.5 total 0:00:00.0 preparing 0:00:00.5 reading 0:00:00.0 masking -------------------- Performance: 27.4 total time 7.2 configuration 0.0 preparing main loop 0.0 moving elements to ocean 20.1 main loop 0.5 updating elements 0.0 cleaning up --------------------

  geospatial_bounds_crs :

  EPSG:4326

  geospatial_bounds_vertical_crs :

  EPSG:5831

  geospatial_lat_min :

  59.960087

  geospatial_lat_max :

  60.04418

  geospatial_lat_units :

  degrees_north

  geospatial_lat_resolution :

  point

  geospatial_lon_min :

  4.832955

  geospatial_lon_max :

  5.201916

  geospatial_lon_units :

  degrees_east

  geospatial_lon_resolution :

  point

  runtime :

  0:00:27.446363

  geospatial_vertical_min :

  0.0

  geospatial_vertical_max :

  0.0

  geospatial_vertical_positive :

  up

Ensemble members are recycled among the 10000 particles

ensemble_number = np.remainder(np.arange(o.num_elements_total()), len(r.realizations)) + 1
o.animation(fast=True, color=ensemble_number, legend=['Member ' + str(i) for i in r.realizations], colorbar=False)

15:35:57 WARNING opendrift:2613: Plotting fast. This will make your plots less accurate.
15:35:59 INFO    opendrift:4823: Saving animation to /root/project/docs/source/gallery/animations/example_ensemble_0.gif...
15:36:19 INFO    opendrift:3241: Time to make animation: 0:00:21.477158

We see that elements forced by different wind ensemble members move differently

o.plot_memory_usage()