ECMWF, as the entrusted entity for the Atmosphere Monitoring Service (CAMS) issued this contract for ‘Development of global reactive gases aspects’, which will provide support for and further development of the global production system of CAMS operated at ECMWF, and will deliver 3D distributions of reactive gases in the troposphere and stratosphere through data assimilation and numerical modelling.

ECMWF, as the entrusted entity for the Atmosphere Monitoring Service (CAMS) issued this contract for ‘Development of global reactive gases aspects’, which will provide support for and further development of the global production system of CAMS operated at ECMWF, and will deliver 3D distributions of reactive gases in the troposphere and stratosphere through data assimilation and numerical modelling. The contractor will deliver improvements to the chemistry schemes and the related parameterisations of source and sink processes in the CAMS global production system. Further, the contractor will provide comprehensive documentation and to contribute to the development of chemistry-specific CAMS products to attract a wider range of users for CAMS. The contractor will also advise the team working on the global production system at ECMWF.