Abstract : H.5
Improving PBL analysis for the COSMO model, with emphasis on complex topography

Jean-Marie Bettems, André Walser

Analysis for the COSMO model is based on the nudging technique. In the current implementation, near surface observations are only used in a very restrictive way. It is thought that the new operational NWP systems being implement by the COSMO members, with a mesh size around 2 km, could benefit from a more systematic usage of 2m temperature and humidity and 10m wind. This paper will present the current effort to develop an improved PBL analysis on the basis of these observations, with a special focus on complex topography.