Note

Go to the end to download the full example code.

Ship drift

from datetime import datetime
from opendrift.models.shipdrift import ShipDrift

o = ShipDrift(loglevel=20)

o.add_readers_from_list([
    'https://thredds.met.no/thredds/dodsC/cmems/topaz6/dataset-topaz6-arc-15min-3km-be.ncml',
    'https://thredds.met.no/thredds/dodsC/mepslatest/meps_lagged_6_h_latest_2_5km_latest.nc',
    'https://thredds.met.no/thredds/dodsC/cmems/mywavewam3km/dataset-wam-arctic-1hr3km-be.ncml'
    ])

20:13:10 INFO    opendrift.models.basemodel:515: OpenDriftSimulation initialised (version 1.12.0 / v1.12.0-26-g390e945)

Seed ship elements at defined position and time Note: beam/length ratio is larger than allowed, but is then clipped internally

o.seed_elements(lon=5.0, lat=63.0, radius=1000, number=1000,
                time=datetime.utcnow(),
                length=80.0, beam=20.0, height=9.0, draft=4.0)

20:13:10 WARNING opendrift.models.shipdrift:181: Ratio of beam to length should be in range 0.12 to 0.18, given range is 0.25-0.25. Using border value.
20:13:10 INFO    opendrift.models.basemodel.environment:218: Adding a dynamical landmask with max. priority based on assumed maximum speed of 2.0 m/s. Adding a customised landmask may be faster...
20:13:13 INFO    opendrift.models.basemodel.environment:245: Fallback values will be used for the following variables which have no readers:
20:13:13 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wave_stokes_drift_x_velocity: 0.000000
20:13:13 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wave_stokes_drift_y_velocity: 0.000000
20:13:13 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wave_significant_height: 0.000000
20:13:13 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment: 0.000000

Running model

o.run(steps=24, stop_on_error=True)

20:13:13 INFO    opendrift.models.basemodel:935: Using existing reader for land_binary_mask
20:13:13 INFO    opendrift.models.basemodel:946: All points are in ocean
20:13:13 INFO    opendrift.models.basemodel:2035: 2024-12-12 20:13:10.031953 - step 1 of 24 - 1000 active elements (0 deactivated)
20:13:13 INFO    opendrift.readers:58: Opening file with xr.open_dataset
20:13:19 INFO    opendrift.readers.reader_netCDF_CF_generic:337: Detected dimensions: {'x': 'x', 'y': 'y', 'time': 'time'}
20:13:19 INFO    opendrift.readers:58: Opening file with xr.open_dataset
20:13:20 INFO    opendrift.readers.reader_netCDF_CF_generic:337: Detected dimensions: {'time': 'time', 'x': 'x', 'y': 'y'}
20:13:20 INFO    opendrift.readers:58: Opening file with xr.open_dataset
20:13:23 INFO    opendrift.readers.reader_netCDF_CF_generic:337: Detected dimensions: {'y': 'rlat', 'x': 'rlon', 'time': 'time'}
20:13:25 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:25 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:27 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:27 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:28 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:28 INFO    opendrift.models.basemodel:2035: 2024-12-12 21:13:10.031953 - step 2 of 24 - 1000 active elements (0 deactivated)
20:13:30 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:30 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:31 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:31 INFO    opendrift.models.basemodel:2035: 2024-12-12 22:13:10.031953 - step 3 of 24 - 1000 active elements (0 deactivated)
20:13:33 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:33 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:33 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:33 INFO    opendrift.models.basemodel:2035: 2024-12-12 23:13:10.031953 - step 4 of 24 - 1000 active elements (0 deactivated)
20:13:35 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:35 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:36 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:36 INFO    opendrift.models.basemodel:2035: 2024-12-13 00:13:10.031953 - step 5 of 24 - 1000 active elements (0 deactivated)
20:13:39 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:39 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:39 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:39 INFO    opendrift.models.basemodel:2035: 2024-12-13 01:13:10.031953 - step 6 of 24 - 1000 active elements (0 deactivated)
20:13:41 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:41 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:41 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:41 INFO    opendrift.models.basemodel:2035: 2024-12-13 02:13:10.031953 - step 7 of 24 - 1000 active elements (0 deactivated)
20:13:43 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:43 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:43 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:43 INFO    opendrift.models.basemodel:2035: 2024-12-13 03:13:10.031953 - step 8 of 24 - 1000 active elements (0 deactivated)
20:13:45 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:45 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:46 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:46 INFO    opendrift.models.basemodel:2035: 2024-12-13 04:13:10.031953 - step 9 of 24 - 1000 active elements (0 deactivated)
20:13:47 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:47 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:48 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:48 INFO    opendrift.models.basemodel:2035: 2024-12-13 05:13:10.031953 - step 10 of 24 - 1000 active elements (0 deactivated)
20:13:50 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:50 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:50 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:50 INFO    opendrift.models.basemodel:2035: 2024-12-13 06:13:10.031953 - step 11 of 24 - 1000 active elements (0 deactivated)
20:13:52 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:52 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:53 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:53 INFO    opendrift.models.basemodel:2035: 2024-12-13 07:13:10.031953 - step 12 of 24 - 1000 active elements (0 deactivated)
20:13:55 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:55 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:56 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:56 INFO    opendrift.models.basemodel:2035: 2024-12-13 08:13:10.031953 - step 13 of 24 - 1000 active elements (0 deactivated)
20:13:57 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:57 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:13:58 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:13:58 INFO    opendrift.models.basemodel:2035: 2024-12-13 09:13:10.031953 - step 14 of 24 - 1000 active elements (0 deactivated)
20:14:00 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:00 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:00 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:00 INFO    opendrift.models.basemodel:2035: 2024-12-13 10:13:10.031953 - step 15 of 24 - 1000 active elements (0 deactivated)
20:14:02 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:02 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:03 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:03 INFO    opendrift.models.basemodel:2035: 2024-12-13 11:13:10.031953 - step 16 of 24 - 1000 active elements (0 deactivated)
20:14:04 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:04 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:06 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:06 INFO    opendrift.models.basemodel:2035: 2024-12-13 12:13:10.031953 - step 17 of 24 - 1000 active elements (0 deactivated)
20:14:07 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:07 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:08 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:08 INFO    opendrift.models.basemodel:2035: 2024-12-13 13:13:10.031953 - step 18 of 24 - 1000 active elements (0 deactivated)
20:14:10 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:10 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:11 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:11 INFO    opendrift.models.basemodel:2035: 2024-12-13 14:13:10.031953 - step 19 of 24 - 1000 active elements (0 deactivated)
20:14:12 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:12 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:13 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:13 INFO    opendrift.models.basemodel:2035: 2024-12-13 15:13:10.031953 - step 20 of 24 - 1000 active elements (0 deactivated)
20:14:14 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:14 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:15 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:15 INFO    opendrift.models.basemodel:2035: 2024-12-13 16:13:10.031953 - step 21 of 24 - 1000 active elements (0 deactivated)
20:14:17 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:17 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:18 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:18 INFO    opendrift.models.basemodel:2035: 2024-12-13 17:13:10.031953 - step 22 of 24 - 1000 active elements (0 deactivated)
20:14:19 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:19 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:20 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:20 INFO    opendrift.models.basemodel:2035: 2024-12-13 18:13:10.031953 - step 23 of 24 - 1000 active elements (0 deactivated)
20:14:21 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:21 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:22 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction
20:14:22 INFO    opendrift.models.basemodel:2035: 2024-12-13 19:13:10.031953 - step 24 of 24 - 1000 active elements (0 deactivated)
20:14:24 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:24 WARNING opendrift.readers.interpolation.structured:46: Ensemble data currently not extrapolated towards seafloor
20:14:24 INFO    opendrift.models.shipdrift:311: Using Stokes drift direction as wave direction

Print and plot results

print(o)
o.plot(linecolor='orientation')
#o.animation(color='orientation', markersize=20, filename="orientation.gif", legend=['left','right'],colorbar=False,cmap='bwr')
o.animation(color='orientation', legend=['left','right'], markersize=20, colorbar=False, cmap='bwr')
OpenDrift - ShipDrift 2024-12-12 20:13 to 2024-12-13 20:13 UTC (25 steps)
===========================
--------------------
Reader performance:
--------------------
global_landmask
 0:00:00.0  total
 0:00:00.0  preparing
 0:00:00.0  reading
 0:00:00.0  masking
--------------------
https://thredds.met.no/thredds/dodsC/cmems/topaz6/dataset-topaz6-arc-15min-3km-be.ncml
 0:00:14.0  total
 0:00:00.0  preparing
 0:00:13.8  reading
 0:00:00.0  interpolation
 0:00:00.0  interpolation_time
 0:00:00.1  rotating vectors
 0:00:00.0  masking
--------------------
https://thredds.met.no/thredds/dodsC/mepslatest/meps_lagged_6_h_latest_2_5km_latest.nc
 0:00:27.3  total
 0:00:00.0  preparing
 0:00:27.1  reading
 0:00:00.2  interpolation
 0:00:00.0  interpolation_time
 0:00:00.1  rotating vectors
 0:00:00.0  masking
--------------------
https://thredds.met.no/thredds/dodsC/cmems/mywavewam3km/dataset-wam-arctic-1hr3km-be.ncml
 0:00:18.7  total
 0:00:00.0  preparing
 0:00:18.5  reading
 0:00:00.0  interpolation
 0:00:00.0  interpolation_time
 0:00:00.2  rotating vectors
 0:00:00.0  masking
--------------------
Performance:
 1:14.8 total time
    3.4 configuration
    0.0 preparing main loop
      0.0 moving elements to ocean
 1:11.4 main loop
      0.5 updating elements
    0.0 cleaning up
--------------------
===========================
Model:  ShipDrift     (OpenDrift version 1.12.0)
        1000 active ShipObject particles  (0 deactivated, 0 scheduled)
-------------------
Environment variables:
  -----
  land_binary_mask
     1) global_landmask
  -----
  x_sea_water_velocity
  y_sea_water_velocity
     1) https://thredds.met.no/thredds/dodsC/cmems/topaz6/dataset-topaz6-arc-15min-3km-be.ncml
     2) https://thredds.met.no/thredds/dodsC/cmems/mywavewam3km/dataset-wam-arctic-1hr3km-be.ncml
  -----
  x_wind
  y_wind
     1) https://thredds.met.no/thredds/dodsC/mepslatest/meps_lagged_6_h_latest_2_5km_latest.nc
  -----
  sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment
  sea_surface_wave_significant_height
  sea_surface_wave_stokes_drift_x_velocity
  sea_surface_wave_stokes_drift_y_velocity
     1) https://thredds.met.no/thredds/dodsC/cmems/mywavewam3km/dataset-wam-arctic-1hr3km-be.ncml

Discarded readers:

Time:
        Start: 2024-12-12 20:13:10.031953 UTC
        Present: 2024-12-13 20:13:10.031953 UTC
        Calculation steps: 24 * 1:00:00 - total time: 1 day, 0:00:00
        Output steps: 25 * 1:00:00
===========================

20:14:58 INFO    opendrift.models.basemodel:4613: Saving animation to /root/project/docs/source/gallery/animations/example_shipdrift_0.gif...
20:16:43 INFO    opendrift.models.basemodel:3037: Time to make animation: 0:01:48.347243
../_images/example_shipdrift_0.gif

Total running time of the script: (3 minutes 44.489 seconds)

Gallery generated by Sphinx-Gallery