Note
Go to the end to download the full example code.
FVCOM: Using model input from unstructured grid
from datetime import timedelta
import urllib.request as urllib_request
import numpy as np
from opendrift.readers import reader_netCDF_CF_unstructured
from opendrift.readers import reader_global_landmask
from opendrift.models.oceandrift import OceanDrift
o = OceanDrift(loglevel=20) # Set loglevel to 0 for debug information
proj = "+proj=utm +zone=33 +north +ellps=WGS84 +datum=WGS84 +units=m +no_defs"
fvcom = reader_netCDF_CF_unstructured.Reader(filename = 'https://thredds.met.no/thredds/dodsC/metusers/knutfd/thredds/netcdf_unstructured_samples/AkvaplanNiva_sample_lonlat_fixed.nc', proj4 = proj)
o.add_reader(fvcom)
print(fvcom)
# Seed elements at defined positions, depth and time
N = 1000
z = -10*np.random.uniform(0, 1, N)
o.seed_elements(lon=18.0, lat=69.8, radius=2000, number=N,
z=z, time=fvcom.start_time)
20:12:44 INFO opendrift.models.basemodel:515: OpenDriftSimulation initialised (version 1.12.0 / v1.12.0-26-g390e945)
20:12:44 INFO opendrift.readers.reader_netCDF_CF_unstructured:98: Opening dataset: https://thredds.met.no/thredds/dodsC/metusers/knutfd/thredds/netcdf_unstructured_samples/AkvaplanNiva_sample_lonlat_fixed.nc
20:12:44 INFO opendrift.readers.reader_netCDF_CF_unstructured:103: Opening file with Dataset
20:12:45 INFO opendrift.readers.reader_netCDF_CF_unstructured:107: Using custom projection: +proj=utm +zone=33 +north +ellps=WGS84 +datum=WGS84 +units=m +no_defs..
20:12:45 INFO opendrift.readers.reader_netCDF_CF_unstructured:117: Reading grid and coordinate variables..
===========================
Reader: https://thredds.met.no/thredds/dodsC/metusers/knutfd/thredds/netcdf_unstructured_samples/AkvaplanNiva_sample_lonlat_fixed.nc
Projection:
+proj=utm +zone=33 +north +ellps=WGS84 +datum=WGS84 +units=m +no_defs
Coverage: [degrees]
xmin: 523286.781250 xmax: 724075.187500
ymin: 7685101.000000 ymax: 7873698.000000
Corners (lon, lat):
( 15.64, 70.97) ( 21.13, 70.87)
( 15.59, 69.27) ( 20.66, 69.18)
Vertical levels [m]:
Not specified
Available time range:
start: 2018-04-30 01:01:52 end: 2018-05-01 00:00:00 step: None
Variables:
sea_floor_depth_below_geoid
sea_surface_height_above_geoid
x_sea_water_velocity
y_sea_water_velocity
sea_water_temperature
sea_water_salinity
sea_water_speed - derived from ['x_sea_water_velocity', 'y_sea_water_velocity']
===========================
0:00:02.1 open dataset
0:00:00.1 build index
20:12:46 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...
20:12:49 INFO opendrift.models.basemodel.environment:245: Fallback values will be used for the following variables which have no readers:
20:12:49 INFO opendrift.models.basemodel.environment:248: sea_surface_height: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: x_wind: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: y_wind: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: upward_sea_water_velocity: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: ocean_vertical_diffusivity: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: sea_surface_wave_significant_height: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: sea_surface_wave_stokes_drift_x_velocity: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: sea_surface_wave_stokes_drift_y_velocity: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: sea_surface_wave_period_at_variance_spectral_density_maximum: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: sea_surface_wave_mean_period_from_variance_spectral_density_second_frequency_moment: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: sea_surface_swell_wave_to_direction: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: sea_surface_swell_wave_peak_period_from_variance_spectral_density: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: sea_surface_swell_wave_significant_height: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: sea_surface_wind_wave_to_direction: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: sea_surface_wind_wave_mean_period: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: sea_surface_wind_wave_significant_height: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: surface_downward_x_stress: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: surface_downward_y_stress: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: turbulent_kinetic_energy: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: turbulent_generic_length_scale: 0.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: ocean_mixed_layer_thickness: 50.000000
20:12:49 INFO opendrift.models.basemodel.environment:248: sea_floor_depth_below_sea_level: 10000.000000
Running model
o.run(time_step=1800, duration=timedelta(hours=12))
20:12:50 INFO opendrift.models.basemodel:935: Using existing reader for land_binary_mask
20:12:51 INFO opendrift.models.basemodel:948: Moving 2 out of 1000 points from land to water
20:12:51 INFO opendrift.models.basemodel:2035: 2018-04-30 01:01:52 - step 1 of 24 - 1000 active elements (0 deactivated)
20:12:51 INFO opendrift.readers.reader_netCDF_CF_unstructured:388: Reading siglay_centers into memory...
20:12:54 INFO opendrift.readers.reader_netCDF_CF_unstructured:392: Reading siglev_centers into memory...
20:12:58 INFO opendrift.readers.reader_netCDF_CF_unstructured:401: Reading ocean depth center into memory...
20:13:01 INFO opendrift.models.basemodel:2035: 2018-04-30 01:31:52 - step 2 of 24 - 1000 active elements (0 deactivated)
20:13:05 INFO opendrift.models.basemodel:2035: 2018-04-30 02:01:52 - step 3 of 24 - 998 active elements (2 deactivated)
20:13:07 INFO opendrift.models.basemodel:2035: 2018-04-30 02:31:52 - step 4 of 24 - 998 active elements (2 deactivated)
20:13:12 INFO opendrift.models.basemodel:2035: 2018-04-30 03:01:52 - step 5 of 24 - 998 active elements (2 deactivated)
20:13:14 INFO opendrift.models.basemodel:2035: 2018-04-30 03:31:52 - step 6 of 24 - 998 active elements (2 deactivated)
20:13:17 INFO opendrift.models.basemodel:2035: 2018-04-30 04:01:52 - step 7 of 24 - 998 active elements (2 deactivated)
20:13:19 INFO opendrift.models.basemodel:2035: 2018-04-30 04:31:52 - step 8 of 24 - 997 active elements (3 deactivated)
20:13:21 INFO opendrift.models.basemodel:2035: 2018-04-30 05:01:52 - step 9 of 24 - 997 active elements (3 deactivated)
20:13:22 INFO opendrift.models.basemodel:2035: 2018-04-30 05:31:52 - step 10 of 24 - 997 active elements (3 deactivated)
20:13:25 INFO opendrift.models.basemodel:2035: 2018-04-30 06:01:52 - step 11 of 24 - 997 active elements (3 deactivated)
20:13:26 INFO opendrift.models.basemodel:2035: 2018-04-30 06:31:52 - step 12 of 24 - 997 active elements (3 deactivated)
20:13:29 INFO opendrift.models.basemodel:2035: 2018-04-30 07:01:52 - step 13 of 24 - 997 active elements (3 deactivated)
20:13:30 INFO opendrift.models.basemodel:2035: 2018-04-30 07:31:52 - step 14 of 24 - 997 active elements (3 deactivated)
20:13:32 INFO opendrift.models.basemodel:2035: 2018-04-30 08:01:52 - step 15 of 24 - 997 active elements (3 deactivated)
20:13:34 INFO opendrift.models.basemodel:2035: 2018-04-30 08:31:52 - step 16 of 24 - 997 active elements (3 deactivated)
20:13:36 INFO opendrift.models.basemodel:2035: 2018-04-30 09:01:52 - step 17 of 24 - 997 active elements (3 deactivated)
20:13:37 INFO opendrift.models.basemodel:2035: 2018-04-30 09:31:52 - step 18 of 24 - 993 active elements (7 deactivated)
20:13:40 INFO opendrift.models.basemodel:2035: 2018-04-30 10:01:52 - step 19 of 24 - 991 active elements (9 deactivated)
20:13:42 INFO opendrift.models.basemodel:2035: 2018-04-30 10:31:52 - step 20 of 24 - 989 active elements (11 deactivated)
20:13:44 INFO opendrift.models.basemodel:2035: 2018-04-30 11:01:52 - step 21 of 24 - 989 active elements (11 deactivated)
20:13:46 INFO opendrift.models.basemodel:2035: 2018-04-30 11:31:52 - step 22 of 24 - 989 active elements (11 deactivated)
20:13:49 INFO opendrift.models.basemodel:2035: 2018-04-30 12:01:52 - step 23 of 24 - 988 active elements (12 deactivated)
20:13:50 INFO opendrift.models.basemodel:2035: 2018-04-30 12:31:52 - step 24 of 24 - 988 active elements (12 deactivated)
Print and plot results
print(o)
===========================
--------------------
Reader performance:
--------------------
https://thredds.met.no/thredds/dodsC/metusers/knutfd/thredds/netcdf_unstructured_samples/AkvaplanNiva_sample_lonlat_fixed.nc
0:00:02.1 open dataset
0:00:00.1 build index
0:00:59.5 total
0:00:00.0 preparing
0:00:59.4 reading
0:00:00.0 rotating vectors
0:00:00.0 masking
--------------------
global_landmask
0:00:01.4 total
0:00:00.0 preparing
0:00:01.4 reading
0:00:00.0 masking
--------------------
Performance:
1:08.7 total time
5.7 configuration
1.4 preparing main loop
1.4 moving elements to ocean
1:01.4 main loop
0.0 updating elements
0.0 cleaning up
--------------------
===========================
Model: OceanDrift (OpenDrift version 1.12.0)
983 active Lagrangian3DArray particles (17 deactivated, 0 scheduled)
-------------------
Environment variables:
-----
x_sea_water_velocity
y_sea_water_velocity
1) https://thredds.met.no/thredds/dodsC/metusers/knutfd/thredds/netcdf_unstructured_samples/AkvaplanNiva_sample_lonlat_fixed.nc
-----
land_binary_mask
1) global_landmask
-----
Readers not added for the following variables:
ocean_mixed_layer_thickness
ocean_vertical_diffusivity
sea_floor_depth_below_sea_level
sea_surface_height
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
Discarded readers:
Time:
Start: 2018-04-30 01:01:52 UTC
Present: 2018-04-30 13:01:52 UTC
Calculation steps: 24 * 0:30:00 - total time: 12:00:00
Output steps: 25 * 0:30:00
===========================
Animation (current as background not yet working).
o.animation(color='z')
20:14:08 INFO opendrift.models.basemodel:4613: Saving animation to /root/project/docs/source/gallery/animations/example_fvcom_0.gif...
20:15:33 INFO opendrift.models.basemodel:3037: Time to make animation: 0:01:39.802581
o.plot(fast=True, buffer = 1.)
20:15:33 WARNING opendrift.models.basemodel:2410: Plotting fast. This will make your plots less accurate.
(<GeoAxes: title={'center': 'OpenDrift - OceanDrift\n2018-04-30 01:01 to 2018-04-30 13:01 UTC (25 steps)'}>, <Figure size 768.468x1100 with 1 Axes>)
Total running time of the script: (2 minutes 58.575 seconds)