Note
Go to the end to download the full example code
Back and forth
import os
import opendrift
from opendrift.readers import reader_netCDF_CF_generic
from opendrift.models.oceandrift import OceanDrift
ncfile = 'backandforth.nc'
o = OceanDrift(loglevel=20) # Set loglevel to 0 for debug information
reader_norkyst = reader_netCDF_CF_generic.Reader(o.test_data_folder() +
'16Nov2015_NorKyst_z_surface/norkyst800_subset_16Nov2015.nc')
#reader_norkyst = reader_netCDF_CF_generic.Reader('https://thredds.met.no/thredds/dodsC/sea/norkyst800m/1h/aggregate_be')
o.add_reader(reader_norkyst)
o.set_config('environment:fallback:land_binary_mask', 0)
14:01:14 INFO opendrift.models.basemodel:539: OpenDriftSimulation initialised (version 1.10.7 / v1.10.6-119-g1da5bec)
14:01:14 INFO opendrift.readers.reader_netCDF_CF_generic:92: Opening dataset: /root/project/tests/test_data/16Nov2015_NorKyst_z_surface/norkyst800_subset_16Nov2015.nc
/opt/conda/envs/opendrift/lib/python3.11/site-packages/pyproj/crs/crs.py:1286: UserWarning: You will likely lose important projection information when converting to a PROJ string from another format. See: https://proj.org/faq.html#what-is-the-best-format-for-describing-coordinate-reference-systems
proj = self._crs.to_proj4(version=version)
Forward run Seeding some particles
lon = 4.2; lat = 60.1;
time = reader_norkyst.start_time
o.seed_elements(lon, lat, radius=1000, number=100, time=time)
o.disable_vertical_motion()
o.run(steps=50*4, time_step=900, time_step_output=3600, outfile=ncfile)
14:01:14 INFO opendrift.models.oceandrift:346: Setting config: drift:vertical_advection -> False
14:01:14 INFO opendrift.models.oceandrift:346: Setting config: drift:vertical_mixing -> False
14:01:14 INFO opendrift.models.basemodel:2591: Fallback values will be used for the following variables which have no readers:
14:01:14 INFO opendrift.models.basemodel:2594: x_wind: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: y_wind: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: upward_sea_water_velocity: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: ocean_vertical_diffusivity: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: sea_surface_wave_significant_height: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: sea_surface_wave_stokes_drift_x_velocity: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: sea_surface_wave_stokes_drift_y_velocity: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: sea_surface_wave_period_at_variance_spectral_density_maximum: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: sea_surface_swell_wave_to_direction: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: sea_surface_swell_wave_peak_period_from_variance_spectral_density: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: sea_surface_swell_wave_significant_height: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: sea_surface_wind_wave_to_direction: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: sea_surface_wind_wave_mean_period: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: sea_surface_wind_wave_significant_height: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: surface_downward_x_stress: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: surface_downward_y_stress: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: turbulent_kinetic_energy: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: turbulent_generic_length_scale: 0.000000
14:01:14 INFO opendrift.models.basemodel:2594: ocean_mixed_layer_thickness: 50.000000
14:01:14 INFO opendrift.models.basemodel:2594: sea_floor_depth_below_sea_level: 10000.000000
14:01:14 INFO opendrift.models.basemodel:1689: No land reader added, making a temporary landmask reader
14:01:20 INFO opendrift.models.basemodel:539: OpenDriftSimulation initialised (version 1.10.7 / v1.10.6-119-g1da5bec)
14:01:20 INFO opendrift.models.basemodel:1713: All points are in ocean
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14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 12:45:00 - step 148 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 13:00:00 - step 149 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 13:15:00 - step 150 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 13:30:00 - step 151 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 13:45:00 - step 152 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 14:00:00 - step 153 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 14:15:00 - step 154 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 14:30:00 - step 155 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 14:45:00 - step 156 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 15:00:00 - step 157 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 15:15:00 - step 158 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 15:30:00 - step 159 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 15:45:00 - step 160 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 16:00:00 - step 161 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 16:15:00 - step 162 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 16:30:00 - step 163 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 16:45:00 - step 164 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 17:00:00 - step 165 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 17:15:00 - step 166 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 17:30:00 - step 167 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 17:45:00 - step 168 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 18:00:00 - step 169 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 18:15:00 - step 170 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 18:30:00 - step 171 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 18:45:00 - step 172 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 19:00:00 - step 173 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 19:15:00 - step 174 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 19:30:00 - step 175 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 19:45:00 - step 176 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 20:00:00 - step 177 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 20:15:00 - step 178 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 20:30:00 - step 179 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 20:45:00 - step 180 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 21:00:00 - step 181 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 21:15:00 - step 182 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 21:30:00 - step 183 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 21:45:00 - step 184 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 22:00:00 - step 185 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 22:15:00 - step 186 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 22:30:00 - step 187 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 22:45:00 - step 188 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 23:00:00 - step 189 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 23:15:00 - step 190 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 23:30:00 - step 191 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-17 23:45:00 - step 192 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-18 00:00:00 - step 193 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-18 00:15:00 - step 194 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-18 00:30:00 - step 195 of 200 - 100 active elements (0 deactivated)
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-18 00:45:00 - step 196 of 200 - 100 active elements (0 deactivated)
14:01:23 WARNING opendrift.readers.basereader.structured:286: Data block from /root/project/tests/test_data/16Nov2015_NorKyst_z_surface/norkyst800_subset_16Nov2015.nc not large enough to cover element positions within timestep. Buffer size (7) must be increased. See `Variables.set_buffer_size`.
/root/project/opendrift/readers/interpolation/interpolators.py:17: RuntimeWarning: overflow encountered in cast
data[mask] = np.finfo(np.float64).min
14:01:23 INFO opendrift.models.basemodel:2882: 2015-11-18 01:00:00 - step 197 of 200 - 100 active elements (0 deactivated)
14:01:24 INFO opendrift.models.basemodel:2882: 2015-11-18 01:15:00 - step 198 of 200 - 100 active elements (0 deactivated)
14:01:24 INFO opendrift.models.basemodel:2882: 2015-11-18 01:30:00 - step 199 of 200 - 100 active elements (0 deactivated)
14:01:24 INFO opendrift.models.basemodel:2882: 2015-11-18 01:45:00 - step 200 of 200 - 100 active elements (0 deactivated)
14:01:24 INFO opendrift.export.io_netcdf:111: Wrote 51 steps to file backandforth.nc
/opt/conda/envs/opendrift/lib/python3.11/site-packages/numpy/ma/core.py:467: RuntimeWarning: invalid value encountered in cast
fill_value = np.array(fill_value, copy=False, dtype=ndtype)
Print and plot results
print(o)
o.plot(buffer=.2, fast=True)
##%%
# Backward run:
# Import forward run, and seed elements at final positions and time
o = opendrift.open(ncfile)
elements_final = o.elements
time_final = o.time
del o
o = OceanDrift(loglevel=20) # Set loglevel to 0 for debug information
o.set_config('environment:fallback:land_binary_mask', 0)
o.add_reader(reader_norkyst)
o.schedule_elements(elements_final, time_final)
o.disable_vertical_motion()
===========================
--------------------
Reader performance:
--------------------
/root/project/tests/test_data/16Nov2015_NorKyst_z_surface/norkyst800_subset_16Nov2015.nc
0:00:01.6 total
0:00:00.0 preparing
0:00:00.2 reading
0:00:00.0 interpolation
0:00:00.0 interpolation_time
0:00:01.3 rotating vectors
0:00:00.0 masking
--------------------
Performance:
9.8 total time
0.3 configuration
6.0 preparing main loop
6.0 moving elements to ocean
3.3 main loop
2.8 readers
1.7 /root/project/tests/test_data/16Nov2015_NorKyst_z_surface/norkyst800_subset_16Nov2015.nc
0.8 postprocessing
0.0 updating elements
0.1 cleaning up
--------------------
===========================
Model: OceanDrift (OpenDrift version 1.10.7)
100 active Lagrangian3DArray particles (0 deactivated, 0 scheduled)
-------------------
Environment variables:
-----
x_sea_water_velocity
y_sea_water_velocity
1) /root/project/tests/test_data/16Nov2015_NorKyst_z_surface/norkyst800_subset_16Nov2015.nc
-----
Readers not added for the following variables:
land_binary_mask
ocean_mixed_layer_thickness
ocean_vertical_diffusivity
sea_floor_depth_below_sea_level
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
Time:
Start: 2015-11-16 00:00:00 UTC
Present: 2015-11-18 02:00:00 UTC
Calculation steps: 200 * 0:15:00 - total time: 2 days, 2:00:00
Output steps: 51 * 1:00:00
===========================
14:01:24 WARNING opendrift.models.basemodel:3226: Plotting fast. This will make your plots less accurate.
0.9128345689654023 ALPHA
14:01:26 DEBUG opendrift.models.basemodel:625: Adding 18 config items from basemodel
14:01:26 DEBUG opendrift.models.basemodel:625: Adding 5 config items from basemodel
14:01:26 DEBUG opendrift.models.basemodel:625: Adding 48 config items from basemodel
14:01:26 INFO opendrift.models.basemodel:539: OpenDriftSimulation initialised (version 1.10.7 / v1.10.6-119-g1da5bec)
14:01:26 DEBUG opendrift.models.basemodel:625: Adding 15 config items from oceandrift
14:01:26 DEBUG opendrift.models.basemodel:637: Overwriting config item seed:z
14:01:26 DEBUG opendrift.export.io_netcdf:269: Importing from backandforth.nc
/opt/conda/envs/opendrift/lib/python3.11/site-packages/numpy/ma/core.py:467: RuntimeWarning: invalid value encountered in cast
fill_value = np.array(fill_value, copy=False, dtype=ndtype)
14:01:26 DEBUG opendrift.models.basemodel:2466: No elements to deactivate
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: general:use_auto_landmask -> True
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: general:coastline_action -> stranding
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: general:time_step_minutes -> 60
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: general:time_step_output_minutes -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: seed:ocean_only -> True
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: seed:number -> 1
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:max_age_seconds -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:advection_scheme -> euler
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:current_uncertainty -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:current_uncertainty_uniform -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:horizontal_diffusivity -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:wind_uncertainty -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:relative_wind -> False
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:deactivate_north_of -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:deactivate_south_of -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:deactivate_east_of -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:deactivate_west_of -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: readers:max_number_of_fails -> 1
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: seed:origin_marker -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: seed:z -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: seed:wind_drift_factor -> 0.02
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: seed:current_drift_factor -> 1
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: seed:terminal_velocity -> 0.0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:x_sea_water_velocity -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:x_sea_water_velocity -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:y_sea_water_velocity -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:y_sea_water_velocity -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:x_wind -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:x_wind -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:y_wind -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:y_wind -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:upward_sea_water_velocity -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:upward_sea_water_velocity -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:ocean_vertical_diffusivity -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:ocean_vertical_diffusivity -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:sea_surface_wave_significant_height -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:sea_surface_wave_significant_height -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:sea_surface_wave_stokes_drift_x_velocity -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:sea_surface_wave_stokes_drift_x_velocity -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:sea_surface_wave_stokes_drift_y_velocity -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:sea_surface_wave_stokes_drift_y_velocity -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:sea_surface_wave_period_at_variance_spectral_density_maximum -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:sea_surface_wave_period_at_variance_spectral_density_maximum -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:sea_surface_swell_wave_to_direction -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:sea_surface_swell_wave_to_direction -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:sea_surface_swell_wave_peak_period_from_variance_spectral_density -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:sea_surface_swell_wave_peak_period_from_variance_spectral_density -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:sea_surface_swell_wave_significant_height -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:sea_surface_swell_wave_significant_height -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:sea_surface_wind_wave_to_direction -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:sea_surface_wind_wave_to_direction -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:sea_surface_wind_wave_mean_period -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:sea_surface_wind_wave_mean_period -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:sea_surface_wind_wave_significant_height -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:sea_surface_wind_wave_significant_height -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:surface_downward_x_stress -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:surface_downward_x_stress -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:surface_downward_y_stress -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:surface_downward_y_stress -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:turbulent_kinetic_energy -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:turbulent_kinetic_energy -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:turbulent_generic_length_scale -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:turbulent_generic_length_scale -> 0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:ocean_mixed_layer_thickness -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:ocean_mixed_layer_thickness -> 50
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:sea_floor_depth_below_sea_level -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:sea_floor_depth_below_sea_level -> 10000
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:constant:land_binary_mask -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: environment:fallback:land_binary_mask -> 0.0
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:vertical_advection -> False
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:vertical_mixing -> False
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: vertical_mixing:timestep -> 60
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: vertical_mixing:diffusivitymodel -> environment
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: vertical_mixing:background_diffusivity -> 1.2e-05
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: vertical_mixing:TSprofiles -> False
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:wind_drift_depth -> 0.1
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:stokes_drift -> True
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:stokes_drift_profile -> Phillips
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:use_tabularised_stokes_drift -> False
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:tabularised_stokes_drift_fetch -> 25000
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: general:seafloor_action -> lift_to_seafloor
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: drift:truncate_ocean_model_below_m -> None
14:01:26 DEBUG opendrift.export.io_netcdf:367: Setting imported config: seed:seafloor -> False
14:01:26 INFO opendrift:78: Returning <class 'opendrift.models.oceandrift.OceanDrift'> object
14:01:26 DEBUG opendrift.models.oceandrift:118: No machine learning correction available.
14:01:26 INFO opendrift.models.basemodel:539: OpenDriftSimulation initialised (version 1.10.7 / v1.10.6-119-g1da5bec)
14:01:26 INFO opendrift.models.oceandrift:346: Setting config: drift:vertical_advection -> False
14:01:26 INFO opendrift.models.oceandrift:346: Setting config: drift:vertical_mixing -> False
Running model backwards from end of forward simulation
o.run(steps=50*4, time_step=-900, time_step_output=3600)
14:01:26 INFO opendrift.models.basemodel:2591: Fallback values will be used for the following variables which have no readers:
14:01:26 INFO opendrift.models.basemodel:2594: x_wind: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: y_wind: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: upward_sea_water_velocity: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: ocean_vertical_diffusivity: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: sea_surface_wave_significant_height: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: sea_surface_wave_stokes_drift_x_velocity: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: sea_surface_wave_stokes_drift_y_velocity: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: sea_surface_wave_period_at_variance_spectral_density_maximum: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: sea_surface_swell_wave_to_direction: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: sea_surface_swell_wave_peak_period_from_variance_spectral_density: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: sea_surface_swell_wave_significant_height: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: sea_surface_wind_wave_to_direction: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: sea_surface_wind_wave_mean_period: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: sea_surface_wind_wave_significant_height: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: surface_downward_x_stress: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: surface_downward_y_stress: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: turbulent_kinetic_energy: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: turbulent_generic_length_scale: 0.000000
14:01:26 INFO opendrift.models.basemodel:2594: ocean_mixed_layer_thickness: 50.000000
14:01:26 INFO opendrift.models.basemodel:2594: sea_floor_depth_below_sea_level: 10000.000000
14:01:26 INFO opendrift.models.basemodel:2654: Backwards simulation, starting from last seeded element
14:01:26 INFO opendrift.models.basemodel:2774: Backwards simulation, starting at time of last seeded element
14:01:26 INFO opendrift.models.basemodel:1689: No land reader added, making a temporary landmask reader
14:01:26 INFO opendrift.models.basemodel:539: OpenDriftSimulation initialised (version 1.10.7 / v1.10.6-119-g1da5bec)
14:01:26 INFO opendrift.models.basemodel:1713: All points are in ocean
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14:01:31 INFO opendrift.models.basemodel:2882: 2015-11-16 05:15:00 - step 180 of 200 - 100 active elements (0 deactivated)
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14:01:31 INFO opendrift.models.basemodel:2882: 2015-11-16 02:30:00 - step 191 of 200 - 100 active elements (0 deactivated)
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14:01:31 INFO opendrift.models.basemodel:2882: 2015-11-16 00:45:00 - step 198 of 200 - 100 active elements (0 deactivated)
14:01:31 INFO opendrift.models.basemodel:2882: 2015-11-16 00:30:00 - step 199 of 200 - 100 active elements (0 deactivated)
14:01:31 INFO opendrift.models.basemodel:2882: 2015-11-16 00:15:00 - step 200 of 200 - 100 active elements (0 deactivated)
Check if backwards simulation brings elements back to their starting position. Some numerical error is expected.
print(o)
o.plot(buffer=.2, fast=True)
os.remove(ncfile)
##%%
# Compare plots forward and backward
===========================
--------------------
Reader performance:
--------------------
/root/project/tests/test_data/16Nov2015_NorKyst_z_surface/norkyst800_subset_16Nov2015.nc
0:00:03.4 total
0:00:00.0 preparing
0:00:00.6 reading
0:00:00.1 interpolation
0:00:00.0 interpolation_time
0:00:02.7 rotating vectors
0:00:00.0 masking
--------------------
Performance:
5.2 total time
0.3 configuration
0.0 preparing main loop
0.0 moving elements to ocean
4.7 main loop
3.3 readers
2.0 /root/project/tests/test_data/16Nov2015_NorKyst_z_surface/norkyst800_subset_16Nov2015.nc
1.0 postprocessing
0.2 updating elements
0.0 cleaning up
--------------------
===========================
Model: OceanDrift (OpenDrift version 1.10.7)
100 active Lagrangian3DArray particles (0 deactivated, 0 scheduled)
-------------------
Environment variables:
-----
x_sea_water_velocity
y_sea_water_velocity
1) /root/project/tests/test_data/16Nov2015_NorKyst_z_surface/norkyst800_subset_16Nov2015.nc
-----
Readers not added for the following variables:
land_binary_mask
ocean_mixed_layer_thickness
ocean_vertical_diffusivity
sea_floor_depth_below_sea_level
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
Time:
Start: 2015-11-18 02:00:00 UTC
Present: 2015-11-16 00:00:00 UTC
Calculation steps: 200 * -1 day, 23:45:00 - total time: -3 days, 22:00:00
Output steps: 51 * -1 day, 23:00:00
===========================
14:01:31 WARNING opendrift.models.basemodel:3226: Plotting fast. This will make your plots less accurate.
0.9128345689654023 ALPHA
Total running time of the script: (0 minutes 19.405 seconds)