If you currently retrieve CAMS Climate Forcing Estimates (2003-2012) from the ECMWF data server (https://apps.ecmwf.int/datasets/data/cams-climate-forcings/) please be aware that the access method for this data is changing.
Access to the We confirm that access to CAMS Climate Forcing Estimates through the ECMWF public web API service is being was stopped on 30 June 2021.
The new access method is through the CAMS Atmosphere Data Store (ADS). You can now access the available data interactively through the ADS web interface (CAMS global radiative forcings and CAMS global radiative forcing - auxilliary variables) and/or programmatically using the API.
...