High-resolution simulation over central Europe: assimilation experiments during COPS IOP 9c

摘要: The impact of assimilating conventional and Global Positioning System (GPS) Zenith Total Delay (ZTD) data over France into the Weather Research Forecasting (WRF) model is investigated during COPS IOP 9c. A convection-permitting horizontal resolution 3.6 km covering whole central Europe was chosen. Four different simulations were conducted to show influence observation types on forecast. Additionally, a comparison with models COSMO-DE COSMO-EU from German Meteorological Service (DWD) performed. The results clear positive configuration WRF Europe. additional assimilation GPS-ZTD shows further improvement integrated water vapour (IWV) correlation, but prediction precipitation not necessarily clear. radiosonde humidity structure after 12 hours, while an overestimation still remains. A operational high-resolution DWD this reveals strong dependence initial boundary-layer wind field especially as near-surface better represented in ECMWF analysis than COSMO analysis. As is, our knowledge, first study applying Europe, it can be used guidance for studies. Copyright © 2011 Royal Society