Developent and application of a MSG/SEVIRI simulator for cliate odel evaluation

A simulator for MSG/SEVIRI observations of Western Europe is presented. The simulator ingests condensate content and particle size profiles for water and ice clouds from a climate model, the KNMI Regional Atmospheric Climate Model (RACMO) in this study, which are translated to reflectances of the 0.6 and 1.6 micron SEVIRI channels. These reflectances are used to evaluate uncertainties in Cloud Optical Thickness (COT), Cloud Thermodynamic Phase (CPH) and particle effective radius retrievals that are based the Nakajima-King (1990) approach. In our study the Cloud Physical Properties (CPP) algorithm of the Climate Monitoring SAF of EUMETSAT is used for this purpose.