...
CAMS global forecast test data is available from 1 September 2022 onwards from the MARS archive. A daily updated test dataset is also available for the most recent 3 days on the FTP server.
MARS
If you have access to ECMWF systems you can retrieve CAMS global forecast test data from MARS archive using keywords:
...
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).
Atmosphere Data Store (ADS)
If you don't have access to ECMWF computers but would still like to access a large subset of test data, you can retrieve fields from the cams-global-atmospheric-composition-forecasts-test dataset using the Copernicus Atmosphere Data Store API.
...
You can use existing requests for the CAMS global atmospheric composition dataset by replacing the dataset name with "cams-global-atmospheric-composition-forecasts-test".
Example
Total aerosol optical depth at 550 nm in NetCDF format, only European domain, 10 dates, day 1 forecast
| Code Block | ||||
|---|---|---|---|---|
| ||||
import cdsapi
c = cdsapi.Client()
c.retrieve(
'cams-global-atmospheric-composition-forecasts-test',
{
'date': '2023-03-01/2023-03-10',
'type': 'forecast',
'format': 'netcdf_zip',
'variable': 'total_aerosol_optical_depth_550nm', # See available variables at:
'time': '00:00', # https://ads.atmosphere.copernicus.eu/cdsapp#!/dataset/cams-global-atmospheric-composition-forecasts?tab=form
'leadtime_hour': [h for h in range(0,24)],
'area': [70, -35, 35, 60], # [N,E,S,W] area boundaries
},
'/tmp/cams_test_20230301_10.nc.zip') |
FTP dissemination
The test dataset is available through ECPDS FTP dissemination systems in these directories:
...
You can use your normal FTP account to access the data. Details about filenames convention or list of available parameters can be found at Copernicus Knowledge Base.
If everything else fails ...
... you can always contact us by sending an email to copernicus-support@ecmwf.int putting "Request for CAMS global test dataset" as a subject and specify:
...