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.set_config('drift: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')
13:17:46 INFO opendrift.models.basemodel:529: OpenDriftSimulation initialised (version 1.11.2 / v1.11.2-11-g21e4c60)
13:17:46 INFO opendrift.readers.reader_netCDF_CF_generic:102: Opening dataset: https://thredds.met.no/thredds/dodsC/cmems/topaz6/dataset-topaz6-arc-15min-3km-be.ncml
13:17:52 INFO opendrift.readers.reader_netCDF_CF_generic:314: Detected dimensions: {'x': 'x', 'y': 'y', 'time': 'time'}
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)
13:17:52 INFO opendrift.models.basemodel.environment:220: Adding a dynamical landmask with max. priority based on assumed maximum speed of 3.0 m/s. Adding a customised landmask may be faster...
13:17:57 INFO opendrift.models.basemodel.environment:247: Fallback values will be used for the following variables which have no readers:
13:17:57 INFO opendrift.models.basemodel.environment:250: sea_surface_height: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: x_wind: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: y_wind: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: upward_sea_water_velocity: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: ocean_vertical_diffusivity: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: sea_surface_wave_significant_height: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: sea_surface_wave_stokes_drift_x_velocity: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: sea_surface_wave_stokes_drift_y_velocity: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: sea_surface_wave_period_at_variance_spectral_density_maximum: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: sea_surface_swell_wave_to_direction: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: sea_surface_swell_wave_peak_period_from_variance_spectral_density: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: sea_surface_swell_wave_significant_height: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: sea_surface_wind_wave_to_direction: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: sea_surface_wind_wave_mean_period: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: sea_surface_wind_wave_significant_height: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: surface_downward_x_stress: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: surface_downward_y_stress: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: turbulent_kinetic_energy: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: turbulent_generic_length_scale: 0.000000
13:17:57 INFO opendrift.models.basemodel.environment:250: ocean_mixed_layer_thickness: 50.000000
13:17:57 INFO opendrift.models.basemodel:908: Using existing reader for land_binary_mask
13:17:57 INFO opendrift.models.basemodel:922: Moving 81 out of 900 points from land to water
13:17:57 WARNING opendrift.models.basemodel:701: Seafloor check not being run because sea_surface_height is missing. This will happen the first time the function is run but if it happens subsequently there is probably a problem.
13:17:57 INFO opendrift.models.basemodel:2011: 2018-01-01 00:00:00 - step 1 of 48 - 900 active elements (0 deactivated)
/root/project/opendrift/readers/interpolation/interpolators.py:17: RuntimeWarning: overflow encountered in cast
data[mask] = np.finfo(np.float64).min
13:17:59 INFO opendrift.models.basemodel:2011: 2018-01-01 01:00:00 - step 2 of 48 - 900 active elements (0 deactivated)
13:18:00 INFO opendrift.models.basemodel:2011: 2018-01-01 02:00:00 - step 3 of 48 - 900 active elements (0 deactivated)
13:18:00 INFO opendrift.models.basemodel:2011: 2018-01-01 03:00:00 - step 4 of 48 - 900 active elements (0 deactivated)
13:18:01 INFO opendrift.models.basemodel:2011: 2018-01-01 04:00:00 - step 5 of 48 - 900 active elements (0 deactivated)
13:18:01 INFO opendrift.models.basemodel:2011: 2018-01-01 05:00:00 - step 6 of 48 - 900 active elements (0 deactivated)
13:18:02 INFO opendrift.models.basemodel:2011: 2018-01-01 06:00:00 - step 7 of 48 - 900 active elements (0 deactivated)
13:18:02 INFO opendrift.models.basemodel:2011: 2018-01-01 07:00:00 - step 8 of 48 - 900 active elements (0 deactivated)
13:18:03 INFO opendrift.models.basemodel:2011: 2018-01-01 08:00:00 - step 9 of 48 - 900 active elements (0 deactivated)
13:18:03 INFO opendrift.models.basemodel:2011: 2018-01-01 09:00:00 - step 10 of 48 - 900 active elements (0 deactivated)
13:18:04 INFO opendrift.models.basemodel:2011: 2018-01-01 10:00:00 - step 11 of 48 - 900 active elements (0 deactivated)
13:18:04 INFO opendrift.models.basemodel:2011: 2018-01-01 11:00:00 - step 12 of 48 - 900 active elements (0 deactivated)
13:18:04 INFO opendrift.models.basemodel:2011: 2018-01-01 12:00:00 - step 13 of 48 - 900 active elements (0 deactivated)
13:18:05 INFO opendrift.models.basemodel:2011: 2018-01-01 13:00:00 - step 14 of 48 - 900 active elements (0 deactivated)
13:18:05 INFO opendrift.models.basemodel:2011: 2018-01-01 14:00:00 - step 15 of 48 - 900 active elements (0 deactivated)
13:18:06 INFO opendrift.models.basemodel:2011: 2018-01-01 15:00:00 - step 16 of 48 - 900 active elements (0 deactivated)
13:18:06 INFO opendrift.models.basemodel:2011: 2018-01-01 16:00:00 - step 17 of 48 - 900 active elements (0 deactivated)
13:18:07 INFO opendrift.models.basemodel:2011: 2018-01-01 17:00:00 - step 18 of 48 - 900 active elements (0 deactivated)
13:18:07 INFO opendrift.models.basemodel:2011: 2018-01-01 18:00:00 - step 19 of 48 - 900 active elements (0 deactivated)
13:18:08 INFO opendrift.models.basemodel:2011: 2018-01-01 19:00:00 - step 20 of 48 - 900 active elements (0 deactivated)
13:18:08 INFO opendrift.models.basemodel:2011: 2018-01-01 20:00:00 - step 21 of 48 - 900 active elements (0 deactivated)
13:18:08 INFO opendrift.models.basemodel:2011: 2018-01-01 21:00:00 - step 22 of 48 - 900 active elements (0 deactivated)
13:18:09 INFO opendrift.models.basemodel:2011: 2018-01-01 22:00:00 - step 23 of 48 - 900 active elements (0 deactivated)
13:18:09 INFO opendrift.models.basemodel:2011: 2018-01-01 23:00:00 - step 24 of 48 - 900 active elements (0 deactivated)
13:18:10 INFO opendrift.models.basemodel:2011: 2018-01-02 00:00:00 - step 25 of 48 - 900 active elements (0 deactivated)
13:18:10 INFO opendrift.models.basemodel:2011: 2018-01-02 01:00:00 - step 26 of 48 - 900 active elements (0 deactivated)
13:18:11 INFO opendrift.models.basemodel:2011: 2018-01-02 02:00:00 - step 27 of 48 - 900 active elements (0 deactivated)
13:18:11 INFO opendrift.models.basemodel:2011: 2018-01-02 03:00:00 - step 28 of 48 - 900 active elements (0 deactivated)
13:18:12 INFO opendrift.models.basemodel:2011: 2018-01-02 04:00:00 - step 29 of 48 - 900 active elements (0 deactivated)
13:18:12 INFO opendrift.models.basemodel:2011: 2018-01-02 05:00:00 - step 30 of 48 - 900 active elements (0 deactivated)
13:18:12 INFO opendrift.models.basemodel:2011: 2018-01-02 06:00:00 - step 31 of 48 - 900 active elements (0 deactivated)
13:18:13 INFO opendrift.models.basemodel:2011: 2018-01-02 07:00:00 - step 32 of 48 - 900 active elements (0 deactivated)
13:18:14 INFO opendrift.models.basemodel:2011: 2018-01-02 08:00:00 - step 33 of 48 - 900 active elements (0 deactivated)
13:18:14 INFO opendrift.models.basemodel:2011: 2018-01-02 09:00:00 - step 34 of 48 - 900 active elements (0 deactivated)
13:18:15 INFO opendrift.models.basemodel:2011: 2018-01-02 10:00:00 - step 35 of 48 - 900 active elements (0 deactivated)
13:18:15 INFO opendrift.models.basemodel:2011: 2018-01-02 11:00:00 - step 36 of 48 - 900 active elements (0 deactivated)
13:18:15 INFO opendrift.models.basemodel:2011: 2018-01-02 12:00:00 - step 37 of 48 - 900 active elements (0 deactivated)
13:18:16 INFO opendrift.models.basemodel:2011: 2018-01-02 13:00:00 - step 38 of 48 - 900 active elements (0 deactivated)
13:18:16 INFO opendrift.models.basemodel:2011: 2018-01-02 14:00:00 - step 39 of 48 - 900 active elements (0 deactivated)
13:18:17 INFO opendrift.models.basemodel:2011: 2018-01-02 15:00:00 - step 40 of 48 - 900 active elements (0 deactivated)
13:18:17 INFO opendrift.models.basemodel:2011: 2018-01-02 16:00:00 - step 41 of 48 - 900 active elements (0 deactivated)
13:18:20 INFO opendrift.models.basemodel:2011: 2018-01-02 17:00:00 - step 42 of 48 - 900 active elements (0 deactivated)
13:18:21 INFO opendrift.models.basemodel:2011: 2018-01-02 18:00:00 - step 43 of 48 - 900 active elements (0 deactivated)
13:18:21 INFO opendrift.models.basemodel:2011: 2018-01-02 19:00:00 - step 44 of 48 - 900 active elements (0 deactivated)
13:18:22 INFO opendrift.models.basemodel:2011: 2018-01-02 20:00:00 - step 45 of 48 - 900 active elements (0 deactivated)
13:18:22 INFO opendrift.models.basemodel:2011: 2018-01-02 21:00:00 - step 46 of 48 - 900 active elements (0 deactivated)
13:18:22 INFO opendrift.models.basemodel:2011: 2018-01-02 22:00:00 - step 47 of 48 - 900 active elements (0 deactivated)
13:18:23 INFO opendrift.models.basemodel:2011: 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
0:00:24.7 total
0:00:00.0 preparing
0:00:24.6 reading
0:00:00.0 interpolation
0:00:00.0 interpolation_time
0:00:00.1 rotating vectors
0:00:00.0 masking
--------------------
global_landmask
0:00:00.0 total
0:00:00.0 preparing
0:00:00.0 reading
0:00:00.0 masking
--------------------
Performance:
36.9 total time
11.0 configuration
0.0 preparing main loop
0.0 moving elements to ocean
25.8 main loop
0.0 updating elements
0.0 cleaning up
--------------------
===========================
Model: OceanDrift (OpenDrift version 1.11.2)
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_height
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
Discarded readers:
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
===========================
/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)
13:18:48 INFO opendrift.models.basemodel:4562: Saving animation to /root/project/docs/source/gallery/animations/example_coastline_0.gif...
13:21:04 INFO opendrift.models.basemodel:3002: Time to make animation: 0:02:18.706255
Total running time of the script: (3 minutes 21.437 seconds)