DRAFT

Description of upgradeof upgrade

The CAMS IFS cycle 49R1 is based on ECMWF's  IFS Cycle 49r1. This is an upgrade with a limited number of scientific contributions for the atmospheric composition aspects. Key elements are an update of the global emissions to the CAMS-GLOB-ANT 6.1 dataset and improvements to the modelling of aerosol.  More information can be found below.

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New and discontinued parameters

Several of the upgrades in CY49R1 have resulted in new parameters, some of which will be added to the dissemination through the Atmosphere Data Store (ADS) and the ECPDS ftp server. For now, the main new parameters are listed in the table below. Others might be added based on user requests. (any changes?)No changes

Change to GRIB encoding

The GRIB model identifiers (generating process identification number) for cycle 49r1 will be changed as follows:

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