RP0261 – Performance comparison of three high resolution configurations over Alpine region

In this work, a comparison among three configurations of COSMO-CLM model at different resolution (0.125◦, 0.0715◦ and 0.02◦) is presented through a performance test over a very complex terrain area: the Alpine region. The following analyses focus on a time period ranging from 1980 to 2009 for temperature, and from 1980 to 2008 for precipitation: all simulations have been respectively compared with E-OBS and EURO4M observational datasets.

The results obtained show that 0.02◦ configuration grants performance inprovements especially for mountain areas, usually characterised by a strong bias forcing most simulations into colder temperatures and heavier precipitations when compared to reference observations.

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