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CAMS global atmospheric composition forecasts

For details about the migration to the CDS API please see here. Currently only string strings should be used as keyword values in an a CDS API request for ADS data.

Analysis data are not available on the ADS webform but they can be downloaded using the CDS API service. The In the request, the keyword 'type' and 'leadtime_hour' have to be set on as 'analysis' and '0' respectively. Please have a look at see the following example:

import cdsapi

c = cdsapi.Client()

c.retrieve(
    'cams-global-atmospheric-composition-forecasts',
    {
        'date': '2021-03-24',
        'time': [
            '06:00', '12:00', '18:00',
        ],
        'leadtime_hour': '0',
        'area': [           #North, West, South, East
            70, -18, 69,
            -17,
        ],
        'type':'analysis',
        'variable': 'total_aerosol_optical_depth_670nm',
        'format': 'netcdf_zip',
    },
    'download.netcdf_zip')

A subset of the CAMS Global atmospheric composition forecast data for the latest three days can also be accessible also accessed through the FTP dissemination service. For a list of variables available on the FTP please see here.

The data remains also listed for now in ECMWF's public data catalogue. To access the data use the ECMWF Web API with ‘dataset’:'cams_nrealtime'. Please have a a look at the following link for Python CAMS real-time examples. 

Access to CAMS global air quality forecast and analysis data through the ECMWF public Web API service will end on 30 June 2021.

To move to the ADS service, please follow our guidelines on How to migrate to CDS API on the Atmosphere Data Store (ADS).

Users with direct access to MARS can Users with access to MARS can also browse the data on the MARS catalogue under class=mc and expver= 0001.

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