Note
Go to the end to download the full example code.
Use a shapefile as landmask
import numpy as np
from opendrift.readers import reader_netCDF_CF_generic
from opendrift.readers import reader_shape
from opendrift.models.oceandrift import OceanDrift
o = OceanDrift(loglevel=20) # Set loglevel to 0 for debug information
# This example works better using hourly input from Thredds than the daily data from test folder
reader_topaz = reader_netCDF_CF_generic.Reader('https://thredds.met.no/thredds/dodsC/cmems/topaz6/dataset-topaz6-arc-15min-3km-be.ncml')
14:20:54 INFO opendrift:509: OpenDriftSimulation initialised (version 1.13.0 / v1.13.0-75-gd4c13d2)
14:20:54 INFO opendrift.readers:58: Opening file with xr.open_dataset
14:20:57 INFO opendrift.readers.reader_netCDF_CF_generic:338: Detected dimensions: {'x': 'x', 'y': 'y', 'time': 'time'}
Use shapes from Cartopy as landmask. These shapefiles are less acurate than those provided by the GSHHG dataset (available though the reader_global_landmask reader).
import cartopy.io.shapereader as shpreader
shpfilename = shpreader.natural_earth(resolution='110m',
category='cultural',
name='admin_0_countries')
reader_natural = reader_shape.Reader.from_shpfiles(shpfilename)
o.add_reader([reader_natural, reader_topaz])
o.set_config('general:use_auto_landmask', False) # Disabling the automatic GSHHG landmask
o.set_config('general:coastline_action', 'stranding')
14:20:57 INFO opendrift.readers.reader_shape:91: Pre-processing 177 geometries
Seeding elements on a grid
lons = np.linspace(12, 14.7, 30)
lats = np.linspace(67.5, 68.5, 30)
lons, lats = np.meshgrid(lons, lats)
lon = lons.ravel()
lat = lats.ravel()
time = reader_topaz.start_time
o.seed_elements(lon, lat, radius=0, number=30*30, time=time)
o.run(steps=48, time_step=3600)
14:20:57 INFO opendrift.models.basemodel.environment:233: Fallback values will be used for the following variables which have no readers:
14:20:57 INFO opendrift.models.basemodel.environment:236: x_wind: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: y_wind: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: upward_sea_water_velocity: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: ocean_vertical_diffusivity: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: sea_surface_wave_significant_height: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: sea_surface_wave_stokes_drift_x_velocity: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: sea_surface_wave_stokes_drift_y_velocity: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: sea_surface_wave_period_at_variance_spectral_density_maximum: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: sea_surface_swell_wave_to_direction: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: sea_surface_swell_wave_peak_period_from_variance_spectral_density: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: sea_surface_swell_wave_significant_height: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: sea_surface_wind_wave_to_direction: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: sea_surface_wind_wave_mean_period: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: sea_surface_wind_wave_significant_height: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: surface_downward_x_stress: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: surface_downward_y_stress: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: turbulent_kinetic_energy: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: turbulent_generic_length_scale: 0.000000
14:20:57 INFO opendrift.models.basemodel.environment:236: ocean_mixed_layer_thickness: 50.000000
14:20:57 INFO opendrift:919: Using existing reader for land_binary_mask
14:20:57 INFO opendrift:932: Moving 20 out of 900 points from land to water
14:20:57 WARNING opendrift:713: Seafloor check not being run because environment is missing. This will happen the first time the function is run but if it happens subsequently there is probably a problem.
14:20:57 INFO opendrift:2056: 2018-01-01 00:00:00 - step 1 of 48 - 900 active elements (0 deactivated)
14:20:59 INFO opendrift:2056: 2018-01-01 01:00:00 - step 2 of 48 - 900 active elements (0 deactivated)
14:20:59 INFO opendrift:2056: 2018-01-01 02:00:00 - step 3 of 48 - 900 active elements (0 deactivated)
14:21:00 INFO opendrift:2056: 2018-01-01 03:00:00 - step 4 of 48 - 900 active elements (0 deactivated)
14:21:01 INFO opendrift:2056: 2018-01-01 04:00:00 - step 5 of 48 - 900 active elements (0 deactivated)
14:21:02 INFO opendrift:2056: 2018-01-01 05:00:00 - step 6 of 48 - 900 active elements (0 deactivated)
14:21:02 INFO opendrift:2056: 2018-01-01 06:00:00 - step 7 of 48 - 900 active elements (0 deactivated)
14:21:03 INFO opendrift:2056: 2018-01-01 07:00:00 - step 8 of 48 - 900 active elements (0 deactivated)
14:21:04 INFO opendrift:2056: 2018-01-01 08:00:00 - step 9 of 48 - 900 active elements (0 deactivated)
14:21:04 INFO opendrift:2056: 2018-01-01 09:00:00 - step 10 of 48 - 900 active elements (0 deactivated)
14:21:05 INFO opendrift:2056: 2018-01-01 10:00:00 - step 11 of 48 - 897 active elements (3 deactivated)
14:21:06 INFO opendrift:2056: 2018-01-01 11:00:00 - step 12 of 48 - 897 active elements (3 deactivated)
14:21:07 INFO opendrift:2056: 2018-01-01 12:00:00 - step 13 of 48 - 897 active elements (3 deactivated)
14:21:07 INFO opendrift:2056: 2018-01-01 13:00:00 - step 14 of 48 - 897 active elements (3 deactivated)
14:21:08 INFO opendrift:2056: 2018-01-01 14:00:00 - step 15 of 48 - 896 active elements (4 deactivated)
14:21:09 INFO opendrift:2056: 2018-01-01 15:00:00 - step 16 of 48 - 896 active elements (4 deactivated)
14:21:09 INFO opendrift:2056: 2018-01-01 16:00:00 - step 17 of 48 - 896 active elements (4 deactivated)
14:21:10 INFO opendrift:2056: 2018-01-01 17:00:00 - step 18 of 48 - 896 active elements (4 deactivated)
14:21:11 INFO opendrift:2056: 2018-01-01 18:00:00 - step 19 of 48 - 896 active elements (4 deactivated)
14:21:11 INFO opendrift:2056: 2018-01-01 19:00:00 - step 20 of 48 - 896 active elements (4 deactivated)
14:21:12 INFO opendrift:2056: 2018-01-01 20:00:00 - step 21 of 48 - 896 active elements (4 deactivated)
14:21:13 INFO opendrift:2056: 2018-01-01 21:00:00 - step 22 of 48 - 896 active elements (4 deactivated)
14:21:13 INFO opendrift:2056: 2018-01-01 22:00:00 - step 23 of 48 - 896 active elements (4 deactivated)
14:21:14 INFO opendrift:2056: 2018-01-01 23:00:00 - step 24 of 48 - 896 active elements (4 deactivated)
14:21:15 INFO opendrift:2056: 2018-01-02 00:00:00 - step 25 of 48 - 896 active elements (4 deactivated)
14:21:16 INFO opendrift:2056: 2018-01-02 01:00:00 - step 26 of 48 - 896 active elements (4 deactivated)
14:21:16 INFO opendrift:2056: 2018-01-02 02:00:00 - step 27 of 48 - 896 active elements (4 deactivated)
14:21:17 INFO opendrift:2056: 2018-01-02 03:00:00 - step 28 of 48 - 896 active elements (4 deactivated)
14:21:18 INFO opendrift:2056: 2018-01-02 04:00:00 - step 29 of 48 - 896 active elements (4 deactivated)
14:21:19 INFO opendrift:2056: 2018-01-02 05:00:00 - step 30 of 48 - 896 active elements (4 deactivated)
14:21:19 INFO opendrift:2056: 2018-01-02 06:00:00 - step 31 of 48 - 896 active elements (4 deactivated)
14:21:20 INFO opendrift:2056: 2018-01-02 07:00:00 - step 32 of 48 - 896 active elements (4 deactivated)
14:21:21 INFO opendrift:2056: 2018-01-02 08:00:00 - step 33 of 48 - 896 active elements (4 deactivated)
14:21:22 INFO opendrift:2056: 2018-01-02 09:00:00 - step 34 of 48 - 896 active elements (4 deactivated)
14:21:23 INFO opendrift:2056: 2018-01-02 10:00:00 - step 35 of 48 - 896 active elements (4 deactivated)
14:21:23 INFO opendrift:2056: 2018-01-02 11:00:00 - step 36 of 48 - 896 active elements (4 deactivated)
14:21:24 INFO opendrift:2056: 2018-01-02 12:00:00 - step 37 of 48 - 895 active elements (5 deactivated)
14:21:25 INFO opendrift:2056: 2018-01-02 13:00:00 - step 38 of 48 - 894 active elements (6 deactivated)
14:21:26 INFO opendrift:2056: 2018-01-02 14:00:00 - step 39 of 48 - 894 active elements (6 deactivated)
14:21:26 INFO opendrift:2056: 2018-01-02 15:00:00 - step 40 of 48 - 894 active elements (6 deactivated)
14:21:27 INFO opendrift:2056: 2018-01-02 16:00:00 - step 41 of 48 - 894 active elements (6 deactivated)
14:21:28 INFO opendrift:2056: 2018-01-02 17:00:00 - step 42 of 48 - 894 active elements (6 deactivated)
14:21:29 INFO opendrift:2056: 2018-01-02 18:00:00 - step 43 of 48 - 894 active elements (6 deactivated)
14:21:29 INFO opendrift:2056: 2018-01-02 19:00:00 - step 44 of 48 - 894 active elements (6 deactivated)
14:21:30 INFO opendrift:2056: 2018-01-02 20:00:00 - step 45 of 48 - 894 active elements (6 deactivated)
14:21:31 INFO opendrift:2056: 2018-01-02 21:00:00 - step 46 of 48 - 894 active elements (6 deactivated)
14:21:32 INFO opendrift:2056: 2018-01-02 22:00:00 - step 47 of 48 - 894 active elements (6 deactivated)
14:21:32 INFO opendrift:2056: 2018-01-02 23:00:00 - step 48 of 48 - 894 active elements (6 deactivated)
The custom landmask from shapefile, which is used for the simulation, is also shown in the map instead of the default GSHHG
o.plot()
o.animation()

14:21:39 INFO opendrift:4600: Saving animation to /root/project/docs/source/gallery/animations/example_shape_landmask_0.gif...
14:22:07 INFO opendrift:3036: Time to make animation: 0:00:29.151264

Total running time of the script: (1 minutes 19.917 seconds)