%0 journal article
%@ 0148-0227
%A Meinke, I.,Storch, H.v.,Feser, F.

%D 2004
%J Journal of Geophysical Research : Atmospheres
%N D 13
%P D13205 
%R doi:10.1029/2004JD004520
%T A validation of the cloud parameterization in the regional model SN-REMO
%U https://doi.org/10.1029/2004JD004520
D 13 
%X The cloud parameterization in the regional atmospheric model SN-REMO (Spectrally Nudged Regional Model) was validated using satellite data from the ISCCP (International Satellite Cloud Climatology Project). There is an overall good agreement between the cloudiness of SN-REMO and ISCCP in terms of temporal and spatial means. However, with further investigation a deficiency was localized regarding the simulation of cloud amount: Too many clouds are simulated. This overestimation occurs especially during the night. It is connected with a poor simulation of the cloud diurnal cycle. Clouds at low-level emissivity heights (1000–475 hPa) are causing this overestimation. The magnitude of the overall overestimation is also affected by the underestimation of simulated cloud amount at high-level emissivity heights (<475 hPa) and its diurnal variation. The overestimation of the simulated cloud amount is caused by subgrid-scale cloudiness. Since the simulation of subgrid-scale clouds in the regional model SN-REMO is described by a relative humidity parameterization, these deficiencies are connected with this parameterization.