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OpenIFS/AC: atmospheric chemistry and aerosol in OpenIFS 43r3

V Huijnen, P Le Sager, MO Köhler, G Carver, S Rémy, J Flemming, S Chabrillat, Q Errera, T van Noije

In this paper, we report on the first implementation of atmospheric chemistry and aerosol as part of the European Centre for Medium-Range Weather Forecasts (ECMWF) OpenIFS model. For this, modules and input data for model cycle CY43R3, which have been developed as part of the Copernicus Atmosphere Monitoring Service (CAMS), have been ported to OpenIFS: the modified CB05 tropospheric chemistry scheme, the AER bulk-bin tropospheric aerosol module, as well as the option to use BASCOE-based stratospheric ozone chemistry. We give an overview of the model, and describe the datasets used for emissions and dry deposition, which are similar to those used in the model configuration applied to create the CAMS Reanalysis. We evaluate two reference model configurations with and without the stratospheric chemistry extension against standard observational datasets for tropospheric ozone, surface carbon monoxide (CO), tropospheric nitrogen dioxide (NO2) and aerosol optical depth. The results give basic confidence in the model implementation and configuration. This OpenIFS version with atmospheric composition components is open to the scientific user community under a standard OpenIFS license.

Bibliografische gegevens

V Huijnen, P Le Sager, MO Köhler, G Carver, S Rémy, J Flemming, S Chabrillat, Q Errera, T van Noije. OpenIFS/AC: atmospheric chemistry and aerosol in OpenIFS 43r3
Journal: Geosci. Model Dev. Discuss., Year: 2022, doi: 10.5194/gmd-2022-80

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