Note
Go to the end to download the full example code
No stranding
import numpy as np
from opendrift.readers import reader_netCDF_CF_generic
from opendrift.readers import reader_ROMS_native
from opendrift.models.oceandrift import OceanDrift
o = OceanDrift(loglevel=20) # Set loglevel to 0 for debug information
o.max_speed = 3
# This example works better using hourly input from Thredds than the daily data from test folder
reader_current = reader_netCDF_CF_generic.Reader('https://thredds.met.no/thredds/dodsC/cmems/topaz6/dataset-topaz6-arc-15min-3km-be.ncml')
#reader_current = reader_ROMS_native.Reader(o.test_data_folder() +
# '2Feb2016_Nordic_sigma_3d/Nordic-4km_SLEVELS_avg_00_subset2Feb2016.nc')
o.add_reader([reader_current])
o.set_config('general:coastline_action', 'previous')
14:01:16 INFO opendrift.models.basemodel:539: OpenDriftSimulation initialised (version 1.10.7 / v1.10.6-119-g1da5bec)
14:01:16 INFO opendrift.readers.reader_netCDF_CF_generic:92: Opening dataset: https://thredds.met.no/thredds/dodsC/cmems/topaz6/dataset-topaz6-arc-15min-3km-be.ncml
/opt/conda/envs/opendrift/lib/python3.11/site-packages/pyproj/crs/crs.py:1286: UserWarning: You will likely lose important projection information when converting to a PROJ string from another format. See: https://proj.org/faq.html#what-is-the-best-format-for-describing-coordinate-reference-systems
proj = self._crs.to_proj4(version=version)
Seeding elements on a grid
lons = np.linspace(12, 14.5, 30)
lats = np.linspace(67.5, 68.5, 30)
lons, lats = np.meshgrid(lons, lats)
lon = lons.ravel()
lat = lats.ravel()
time = reader_current.start_time
o.seed_elements(lon, lat, radius=0, number=30*30, time=time)
o.run(steps=24*2, time_step=3600)
14:01:24 INFO opendrift.models.basemodel:2591: Fallback values will be used for the following variables which have no readers:
14:01:24 INFO opendrift.models.basemodel:2594: x_wind: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: y_wind: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: upward_sea_water_velocity: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: ocean_vertical_diffusivity: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: sea_surface_wave_significant_height: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: sea_surface_wave_stokes_drift_x_velocity: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: sea_surface_wave_stokes_drift_y_velocity: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: sea_surface_wave_period_at_variance_spectral_density_maximum: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: sea_surface_swell_wave_to_direction: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: sea_surface_swell_wave_peak_period_from_variance_spectral_density: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: sea_surface_swell_wave_significant_height: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: sea_surface_wind_wave_to_direction: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: sea_surface_wind_wave_mean_period: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: sea_surface_wind_wave_significant_height: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: surface_downward_x_stress: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: surface_downward_y_stress: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: turbulent_kinetic_energy: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: turbulent_generic_length_scale: 0.000000
14:01:24 INFO opendrift.models.basemodel:2594: ocean_mixed_layer_thickness: 50.000000
14:01:24 INFO opendrift.models.basemodel:2753: Adding a dynamical landmask with max. priority based on assumed maximum speed of 3 m/s. Adding a customised landmask may be faster...
14:01:30 INFO opendrift.models.basemodel:1701: Using existing reader for land_binary_mask
14:01:30 INFO opendrift.models.basemodel:1715: Moving 81 out of 900 points from land to water
/root/project/opendrift/readers/interpolation/interpolators.py:17: RuntimeWarning: overflow encountered in cast
data[mask] = np.finfo(np.float64).min
14:01:30 INFO opendrift.models.basemodel:2882: 2018-01-01 00:00:00 - step 1 of 48 - 900 active elements (0 deactivated)
14:01:31 INFO opendrift.models.basemodel:2882: 2018-01-01 01:00:00 - step 2 of 48 - 900 active elements (0 deactivated)
14:01:31 INFO opendrift.models.basemodel:2882: 2018-01-01 02:00:00 - step 3 of 48 - 900 active elements (0 deactivated)
14:01:32 INFO opendrift.models.basemodel:2882: 2018-01-01 03:00:00 - step 4 of 48 - 900 active elements (0 deactivated)
14:01:32 INFO opendrift.models.basemodel:2882: 2018-01-01 04:00:00 - step 5 of 48 - 900 active elements (0 deactivated)
14:01:33 INFO opendrift.models.basemodel:2882: 2018-01-01 05:00:00 - step 6 of 48 - 900 active elements (0 deactivated)
14:01:33 INFO opendrift.models.basemodel:2882: 2018-01-01 06:00:00 - step 7 of 48 - 900 active elements (0 deactivated)
14:01:33 INFO opendrift.models.basemodel:2882: 2018-01-01 07:00:00 - step 8 of 48 - 900 active elements (0 deactivated)
14:01:34 INFO opendrift.models.basemodel:2882: 2018-01-01 08:00:00 - step 9 of 48 - 900 active elements (0 deactivated)
14:01:34 INFO opendrift.models.basemodel:2882: 2018-01-01 09:00:00 - step 10 of 48 - 900 active elements (0 deactivated)
14:01:35 INFO opendrift.models.basemodel:2882: 2018-01-01 10:00:00 - step 11 of 48 - 900 active elements (0 deactivated)
14:01:35 INFO opendrift.models.basemodel:2882: 2018-01-01 11:00:00 - step 12 of 48 - 900 active elements (0 deactivated)
14:01:36 INFO opendrift.models.basemodel:2882: 2018-01-01 12:00:00 - step 13 of 48 - 900 active elements (0 deactivated)
14:01:36 INFO opendrift.models.basemodel:2882: 2018-01-01 13:00:00 - step 14 of 48 - 900 active elements (0 deactivated)
14:01:36 INFO opendrift.models.basemodel:2882: 2018-01-01 14:00:00 - step 15 of 48 - 900 active elements (0 deactivated)
14:01:37 INFO opendrift.models.basemodel:2882: 2018-01-01 15:00:00 - step 16 of 48 - 900 active elements (0 deactivated)
14:01:37 INFO opendrift.models.basemodel:2882: 2018-01-01 16:00:00 - step 17 of 48 - 900 active elements (0 deactivated)
14:01:38 INFO opendrift.models.basemodel:2882: 2018-01-01 17:00:00 - step 18 of 48 - 900 active elements (0 deactivated)
14:01:38 INFO opendrift.models.basemodel:2882: 2018-01-01 18:00:00 - step 19 of 48 - 900 active elements (0 deactivated)
14:01:39 INFO opendrift.models.basemodel:2882: 2018-01-01 19:00:00 - step 20 of 48 - 900 active elements (0 deactivated)
14:01:39 INFO opendrift.models.basemodel:2882: 2018-01-01 20:00:00 - step 21 of 48 - 900 active elements (0 deactivated)
14:01:40 INFO opendrift.models.basemodel:2882: 2018-01-01 21:00:00 - step 22 of 48 - 900 active elements (0 deactivated)
14:01:40 INFO opendrift.models.basemodel:2882: 2018-01-01 22:00:00 - step 23 of 48 - 900 active elements (0 deactivated)
14:01:40 INFO opendrift.models.basemodel:2882: 2018-01-01 23:00:00 - step 24 of 48 - 900 active elements (0 deactivated)
14:01:41 INFO opendrift.models.basemodel:2882: 2018-01-02 00:00:00 - step 25 of 48 - 900 active elements (0 deactivated)
14:01:41 INFO opendrift.models.basemodel:2882: 2018-01-02 01:00:00 - step 26 of 48 - 900 active elements (0 deactivated)
14:01:42 INFO opendrift.models.basemodel:2882: 2018-01-02 02:00:00 - step 27 of 48 - 900 active elements (0 deactivated)
14:01:42 INFO opendrift.models.basemodel:2882: 2018-01-02 03:00:00 - step 28 of 48 - 900 active elements (0 deactivated)
14:01:43 INFO opendrift.models.basemodel:2882: 2018-01-02 04:00:00 - step 29 of 48 - 900 active elements (0 deactivated)
14:01:43 INFO opendrift.models.basemodel:2882: 2018-01-02 05:00:00 - step 30 of 48 - 900 active elements (0 deactivated)
14:01:43 INFO opendrift.models.basemodel:2882: 2018-01-02 06:00:00 - step 31 of 48 - 900 active elements (0 deactivated)
14:01:44 INFO opendrift.models.basemodel:2882: 2018-01-02 07:00:00 - step 32 of 48 - 900 active elements (0 deactivated)
14:01:45 INFO opendrift.models.basemodel:2882: 2018-01-02 08:00:00 - step 33 of 48 - 900 active elements (0 deactivated)
14:01:46 INFO opendrift.models.basemodel:2882: 2018-01-02 09:00:00 - step 34 of 48 - 900 active elements (0 deactivated)
14:01:47 INFO opendrift.models.basemodel:2882: 2018-01-02 10:00:00 - step 35 of 48 - 900 active elements (0 deactivated)
14:01:47 INFO opendrift.models.basemodel:2882: 2018-01-02 11:00:00 - step 36 of 48 - 900 active elements (0 deactivated)
14:01:49 INFO opendrift.models.basemodel:2882: 2018-01-02 12:00:00 - step 37 of 48 - 900 active elements (0 deactivated)
14:01:50 INFO opendrift.models.basemodel:2882: 2018-01-02 13:00:00 - step 38 of 48 - 900 active elements (0 deactivated)
14:01:50 INFO opendrift.models.basemodel:2882: 2018-01-02 14:00:00 - step 39 of 48 - 900 active elements (0 deactivated)
14:01:50 INFO opendrift.models.basemodel:2882: 2018-01-02 15:00:00 - step 40 of 48 - 900 active elements (0 deactivated)
14:01:51 INFO opendrift.models.basemodel:2882: 2018-01-02 16:00:00 - step 41 of 48 - 900 active elements (0 deactivated)
14:01:51 INFO opendrift.models.basemodel:2882: 2018-01-02 17:00:00 - step 42 of 48 - 900 active elements (0 deactivated)
14:01:52 INFO opendrift.models.basemodel:2882: 2018-01-02 18:00:00 - step 43 of 48 - 900 active elements (0 deactivated)
14:01:52 INFO opendrift.models.basemodel:2882: 2018-01-02 19:00:00 - step 44 of 48 - 900 active elements (0 deactivated)
14:01:53 INFO opendrift.models.basemodel:2882: 2018-01-02 20:00:00 - step 45 of 48 - 900 active elements (0 deactivated)
14:01:53 INFO opendrift.models.basemodel:2882: 2018-01-02 21:00:00 - step 46 of 48 - 900 active elements (0 deactivated)
14:01:53 INFO opendrift.models.basemodel:2882: 2018-01-02 22:00:00 - step 47 of 48 - 900 active elements (0 deactivated)
14:01:54 INFO opendrift.models.basemodel:2882: 2018-01-02 23:00:00 - step 48 of 48 - 900 active elements (0 deactivated)
Print and plot results
print(o)
o.plot()
#o.plot(background=['x_sea_water_velocity', 'y_sea_water_velocity'])
o.animation()
===========================
--------------------
Reader performance:
--------------------
https://thredds.met.no/thredds/dodsC/cmems/topaz6/dataset-topaz6-arc-15min-3km-be.ncml
0:00:23.0 total
0:00:00.0 preparing
0:00:22.9 reading
0:00:00.0 interpolation
0:00:00.0 interpolation_time
0:00:00.0 masking
0:00:00.1 rotating vectors
--------------------
global_landmask
0:00:00.0 total
0:00:00.0 preparing
0:00:00.0 reading
0:00:00.0 masking
--------------------
Performance:
38.2 total time
7.5 configuration
6.4 preparing main loop
6.4 making dynamical landmask
0.0 moving elements to ocean
23.6 readers
0.0 global_landmask
0.2 postprocessing
24.1 main loop
23.1 https://thredds.met.no/thredds/dodsC/cmems/topaz6/dataset-topaz6-arc-15min-3km-be.ncml
0.0 updating elements
0.0 cleaning up
--------------------
===========================
Model: OceanDrift (OpenDrift version 1.10.7)
900 active Lagrangian3DArray particles (0 deactivated, 0 scheduled)
-------------------
Environment variables:
-----
sea_floor_depth_below_sea_level
x_sea_water_velocity
y_sea_water_velocity
1) https://thredds.met.no/thredds/dodsC/cmems/topaz6/dataset-topaz6-arc-15min-3km-be.ncml
-----
land_binary_mask
1) global_landmask
-----
Readers not added for the following variables:
ocean_mixed_layer_thickness
ocean_vertical_diffusivity
sea_surface_swell_wave_peak_period_from_variance_spectral_density
sea_surface_swell_wave_significant_height
sea_surface_swell_wave_to_direction
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
sea_surface_wind_wave_mean_period
sea_surface_wind_wave_significant_height
sea_surface_wind_wave_to_direction
surface_downward_x_stress
surface_downward_y_stress
turbulent_generic_length_scale
turbulent_kinetic_energy
upward_sea_water_velocity
x_wind
y_wind
Time:
Start: 2018-01-01 00:00:00 UTC
Present: 2018-01-03 00:00:00 UTC
Calculation steps: 48 * 1:00:00 - total time: 2 days, 0:00:00
Output steps: 49 * 1:00:00
===========================
0.43684570043445464 ALPHA
/opt/conda/envs/opendrift/lib/python3.11/site-packages/cartopy/mpl/geoaxes.py:1696: UserWarning: No data for colormapping provided via 'c'. Parameters 'cmap' will be ignored
result = super().scatter(*args, **kwargs)
14:02:21 INFO opendrift.models.basemodel:5350: Saving animation to /root/project/docs/source/gallery/animations/example_coastline_0.gif...
14:04:23 INFO opendrift.models.basemodel:3848: Time to make animation: 0:02:04.660897
Total running time of the script: (3 minutes 9.918 seconds)