Evaluation of Model-Predicted Top-of-Atmosphere Radiation and Cloud Parameters over Africa with Observations from GERB and SEVIRI | Zendy

Wouter Greuell | Zendy; Erik van Meijgaard | Zendy; Nicolas Clerbaux | Zendy; Jan Fokke Meirink | Zendy

Open Access

Evaluation of Model-Predicted Top-of-Atmosphere Radiation and Cloud Parameters over Africa with Observations from GERB and SEVIRI

Author(s) -

Wouter Greuell,

Erik van Meijgaard,

Nicolas Clerbaux,

Jan Fokke Meirink

Publication year - 2011

Publication title -

journal of climate

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.315

H-Index - 287

eISSN - 1520-0442

pISSN - 0894-8755

DOI - 10.1175/2011jcli3856.1

Subject(s) - environmental science , outgoing longwave radiation , shortwave , cirrus , cloud cover , cloud height , liquid water path , albedo (alchemy) , cloud albedo , atmospheric sciences , moderate resolution imaging spectroradiometer , cloud top , longwave , atmosphere (unit) , earth's energy budget , atmospheric model , shortwave radiation , meteorology , climate model , climatology , satellite , radiative transfer , radiation , precipitation , cloud computing , geology , climate change , geography , physics , convection , art , astronomy , performance art , oceanography , computer science , operating system , quantum mechanics , art history

This study compared the Regional Atmospheric Climate Model version 2 (RACMO) with satellite data by simultaneously looking at cloud properties and top-of-atmosphere (TOA) fluxes. This study used cloud properties retrieved from Spinning Enhanced Visible and Infrared Imager (SEVIRI) data and TOA shortwave and longwave outgoing radiative fluxes measured by one of the Geostationary Earth Radiation Budget (GERB) sensors. Both SEVIRI and GERB resolve the diurnal cycle extremely well with 96 images per day. To test the physical parameterizations of the model, RACMO was run for a domain-enclosing Africa and part of the surrounding oceans. Simulations for July 2006, forced at the lateral boundaries by ERA-Interim reanalyses, show generally accurate positioning of the various cloud regimes but also some important model–observation differences, which the authors tried to reduce by altering model parameterizations. These differences are as follows: 1) TOA albedo differences in clear-sky regions like the Sahar...

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