Test of Mesoscale Numerical Model on Swiss Midlands

Mountain and valley systems exert a particularly strong influence on air flow, through channelling effects of the topography, and through the generation of mountain and valley breezes. The purpose of this limited study was to see how far a mesoscale numerical model can simulate regional effects due to the complex topography of the Swiss Midlands, and to compare these results with measurements carried out in the summers of 1990 and 1991 during the two first campaigns of the POLLUMET (POLLution and METeorology) project.