Note

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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

13:58:55 INFO    opendrift.models.basemodel:539: OpenDriftSimulation initialised (version 1.10.7 / v1.10.6-119-g1da5bec)

Disable any 3D motion

o.disable_vertical_motion()

13:58:55 INFO    opendrift.models.oceandrift:346: Setting config: drift:vertical_advection -> False
13:58:55 INFO    opendrift.models.oceandrift:346: Setting config: drift:vertical_mixing -> False

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)

Running model for 6 hours

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

13:58:55 INFO    opendrift.models.basemodel:2591: Fallback values will be used for the following variables which have no readers:
13:58:55 INFO    opendrift.models.basemodel:2594:       x_sea_water_velocity: 0.100000
13:58:55 INFO    opendrift.models.basemodel:2594:       y_sea_water_velocity: 0.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       x_wind: 7.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       y_wind: 0.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       upward_sea_water_velocity: 0.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       ocean_vertical_diffusivity: 0.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       sea_surface_wave_significant_height: 2.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       sea_surface_wave_stokes_drift_x_velocity: 0.200000
13:58:55 INFO    opendrift.models.basemodel:2594:       sea_surface_wave_stokes_drift_y_velocity: 0.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       sea_surface_wave_period_at_variance_spectral_density_maximum: 8.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment: 0.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       sea_surface_swell_wave_to_direction: 0.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       sea_surface_swell_wave_peak_period_from_variance_spectral_density: 0.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       sea_surface_swell_wave_significant_height: 0.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       sea_surface_wind_wave_to_direction: 0.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       sea_surface_wind_wave_mean_period: 0.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       sea_surface_wind_wave_significant_height: 0.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       surface_downward_x_stress: 0.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       surface_downward_y_stress: 0.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       turbulent_kinetic_energy: 0.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       turbulent_generic_length_scale: 0.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       ocean_mixed_layer_thickness: 50.000000
13:58:55 INFO    opendrift.models.basemodel:2594:       sea_floor_depth_below_sea_level: 10000.000000
13:58:55 INFO    opendrift.models.basemodel:2753: Adding a dynamical landmask with max. priority based on assumed maximum speed of 1 m/s. Adding a customised landmask may be faster...
13:59:01 INFO    opendrift.models.basemodel:1701: Using existing reader for land_binary_mask
13:59:01 INFO    opendrift.models.basemodel:1713: All points are in ocean
13:59:01 INFO    opendrift.models.basemodel:2882: 2023-09-01 13:58:55.559667 - step 1 of 36 - 50 active elements (0 deactivated)
13:59:01 INFO    opendrift.models.basemodel:2882: 2023-09-01 14:08:55.559667 - step 2 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()

13:59:02 INFO    opendrift.models.basemodel:5350: Saving animation to /root/project/docs/source/gallery/animations/example_2d_0.gif...
13:59:04 INFO    opendrift.models.basemodel:4038: Time to make animation: 0:00:02.106241
../_images/example_2d_0.gif

Total running time of the script: (0 minutes 9.173 seconds)

Gallery generated by Sphinx-Gallery