Note

Go to the end to download the full example code.

2D simulation profile

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

o = OceanDrift(loglevel=20)  # Set loglevel to 0 for debug information

20:10:58 INFO    opendrift.models.basemodel:515: OpenDriftSimulation initialised (version 1.12.0 / v1.12.0-26-g390e945)

Define some constant current, wind and Stokes drift

o.set_config('environment:fallback:x_wind', 7)
o.set_config('environment:fallback:x_sea_water_velocity', .1)
o.set_config('environment:fallback:sea_surface_wave_stokes_drift_x_velocity', .2)
o.set_config('environment:fallback:sea_surface_wave_significant_height', 2)
o.set_config('environment:fallback:sea_surface_wave_period_at_variance_spectral_density_maximum', 8)

Seed elements between surface and 5m depth

time = datetime.utcnow()
z = -np.linspace(0, 5, 50)
o.seed_elements(lon=4.5, lat=60.0, z=z, radius=0, number=len(z), time=time)

20:10:58 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...
20:11:01 INFO    opendrift.models.basemodel.environment:245: Fallback values will be used for the following variables which have no readers:
20:11:01 INFO    opendrift.models.basemodel.environment:248:    x_sea_water_velocity: 0.100000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    y_sea_water_velocity: 0.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    sea_surface_height: 0.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    x_wind: 7.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    y_wind: 0.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    upward_sea_water_velocity: 0.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    ocean_vertical_diffusivity: 0.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wave_significant_height: 2.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wave_stokes_drift_x_velocity: 0.200000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wave_stokes_drift_y_velocity: 0.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wave_period_at_variance_spectral_density_maximum: 8.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment: 0.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    sea_surface_swell_wave_to_direction: 0.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    sea_surface_swell_wave_peak_period_from_variance_spectral_density: 0.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    sea_surface_swell_wave_significant_height: 0.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wind_wave_to_direction: 0.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wind_wave_mean_period: 0.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wind_wave_significant_height: 0.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    surface_downward_x_stress: 0.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    surface_downward_y_stress: 0.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    turbulent_kinetic_energy: 0.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    turbulent_generic_length_scale: 0.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    ocean_mixed_layer_thickness: 50.000000
20:11:01 INFO    opendrift.models.basemodel.environment:248:    sea_floor_depth_below_sea_level: 10000.000000

Running model for 6 hours

o.run(duration=timedelta(hours=6), time_step=600)

20:11:02 INFO    opendrift.models.basemodel:935: Using existing reader for land_binary_mask
20:11:02 INFO    opendrift.models.basemodel:946: All points are in ocean
20:11:02 INFO    opendrift.models.basemodel:2035: 2024-12-12 20:10:58.102991 - step 1 of 36 - 50 active elements (0 deactivated)
20:11:02 INFO    opendrift.models.basemodel:2035: 2024-12-12 20:20:58.102991 - step 2 of 36 - 50 active elements (0 deactivated)
20:11:02 INFO    opendrift.models.basemodel:2035: 2024-12-12 20:30:58.102991 - step 3 of 36 - 50 active elements (0 deactivated)
20:11:02 INFO    opendrift.models.basemodel:2035: 2024-12-12 20:40:58.102991 - step 4 of 36 - 50 active elements (0 deactivated)
20:11:02 INFO    opendrift.models.basemodel:2035: 2024-12-12 20:50:58.102991 - step 5 of 36 - 50 active elements (0 deactivated)
20:11:02 INFO    opendrift.models.basemodel:2035: 2024-12-12 21:00:58.102991 - step 6 of 36 - 50 active elements (0 deactivated)
20:11:02 INFO    opendrift.models.basemodel:2035: 2024-12-12 21:10:58.102991 - step 7 of 36 - 50 active elements (0 deactivated)
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20:11:02 INFO    opendrift.models.basemodel:2035: 2024-12-12 21:30:58.102991 - step 9 of 36 - 50 active elements (0 deactivated)
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To check that z is really kept constant for all particles

o.plot_property('z')
z

Vertical profile of advection. Note the decaying importance of Stokes drift, and the additional windage of the element at surface

o.animation_profile()

/root/project/opendrift/models/basemodel/__init__.py:3156: UserWarning: No data for colormapping provided via 'c'. Parameters 'cmap' will be ignored
  points = ax.scatter([], [],
20:11:02 INFO    opendrift.models.basemodel:4613: Saving animation to /root/project/docs/source/gallery/animations/example_2d_0.gif...
20:11:06 INFO    opendrift.models.basemodel:3251: Time to make animation: 0:00:03.782193
../_images/example_2d_0.gif

Total running time of the script: (0 minutes 13.715 seconds)

Gallery generated by Sphinx-Gallery