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

14:41:06 INFO    opendrift.models.basemodel:507: OpenDriftSimulation initialised (version 1.11.5 / v1.11.5-4-g5577ceb)

Disable any 3D motion

o.disable_vertical_motion()

14:41:06 INFO    opendrift.models.oceandrift:377: Setting config: drift:vertical_advection -> False
14:41:06 INFO    opendrift.models.oceandrift:377: 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)

41:06 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...
41:12 INFO    opendrift.models.basemodel.environment:245: Fallback values will be used for the following variables which have no readers:
41:12 INFO    opendrift.models.basemodel.environment:248:    x_sea_water_velocity: 0.100000
41:12 INFO    opendrift.models.basemodel.environment:248:    y_sea_water_velocity: 0.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    sea_surface_height: 0.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    x_wind: 7.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    y_wind: 0.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    upward_sea_water_velocity: 0.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    ocean_vertical_diffusivity: 0.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wave_significant_height: 2.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wave_stokes_drift_x_velocity: 0.200000
41:12 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wave_stokes_drift_y_velocity: 0.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wave_period_at_variance_spectral_density_maximum: 8.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment: 0.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    sea_surface_swell_wave_to_direction: 0.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    sea_surface_swell_wave_peak_period_from_variance_spectral_density: 0.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    sea_surface_swell_wave_significant_height: 0.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wind_wave_to_direction: 0.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wind_wave_mean_period: 0.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    sea_surface_wind_wave_significant_height: 0.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    surface_downward_x_stress: 0.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    surface_downward_y_stress: 0.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    turbulent_kinetic_energy: 0.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    turbulent_generic_length_scale: 0.000000
41:12 INFO    opendrift.models.basemodel.environment:248:    ocean_mixed_layer_thickness: 50.000000
41:12 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)

41:12 INFO    opendrift.models.basemodel:885: Using existing reader for land_binary_mask
41:12 INFO    opendrift.models.basemodel:896: All points are in ocean
41:12 INFO    opendrift.models.basemodel:1985: 2024-06-20 14:41:06.833119 - step 1 of 36 - 50 active elements (0 deactivated)
41:12 INFO    opendrift.models.basemodel:1985: 2024-06-20 14:51:06.833119 - 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')

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:3099: UserWarning: No data for colormapping provided via 'c'. Parameters 'cmap' will be ignored
  points = ax.scatter([], [],
14:41:13 INFO    opendrift.models.basemodel:4547: Saving animation to /root/project/docs/source/gallery/animations/example_2d_0.gif...
14:41:16 INFO    opendrift.models.basemodel:3194: Time to make animation: 0:00:03.552345

Total running time of the script: (0 minutes 11.916 seconds)

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