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You can use this link to directly access the data in the MARS catalogue (please remember that ecCodes version 2.28.0 or later is required to handle the full range of parameters of current CAMS data).
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If you don't have access to ECMWF computers but would still like to access a large subset of test data, you can use the Copernicus Atmosphere Data Store API service.
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Read documentation and see brief request syntax of the ECMWF WebAPI serviceCopernicus Atmosphere Data Store API. |
If you haven't done it yet you will need to create an account and accept the terms of use of Copernicus Atmosphere Data Store.
Example
Total aerosol optical depth at 550 nm in NetCDF format, only European domain, 10 dates, day 1 forecast
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#!/usr/bin/env python from ecmwfapi import ECMWFDataServer serverimport cdsapi c = ECMWFDataServercdsapi.Client() serverc.retrieve({ "dataset": "'cams-global-atmospheric-composition-forecasts-test",', { "stream" 'date': "oper" '2023-03-01/2023-03-10', "type": 'type': "fc" 'forecast', "date" 'format': "20230301/to/20230310", 'netcdf_zip', "time"'variable': "00"'total_aerosol_optical_depth_550nm', # See available variables at: "step": 'time': "0/to/23/by/1", "levtype": "sfc", '00:00', "format": "netcdf", "param" : "aod550", # see parameter table at# httphttps://ads.atmosphere.copernicus.eu/ftp-access-global-data (broken link) /cdsapp#!/dataset/cams-global-atmospheric-composition-forecasts?tab=form "grid"'leadtime_hour': [h for h in "0.4/0.4",range(0,24)], # 0.4 x 0.4 regular lat-lon grid "area":'area': [70, -35, 35, 60], "70/-35/35/60", # [N/,E/,S/,W] area boundaries "target":}, "'/tmp/cams_test_20230301_10.nc" }.zip') |
FTP dissemination
The test dataset is available through ECPDS FTP dissemination systems in these directories:
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