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The aim of this report is to analyze the sensitivity of the precipitation and the 2-meters mean temperature on the variation of some physical, numerical and tuning parameters in the regional climate model COSMO-CLM over the north and center Italy. The simulations, at a spatial resolution of 8 km and concerning the period 1996-2000, are driven by ERA40 Reanalysis. Five different subareas inside the computational domain have been selected, chacterized by different orographic features; the seasonal cycle has been calculated for each simulation and compared with three different data sets: E-OBS, ETH and ARPA-EMR data set.

We would like to thank Kay Radtke (BTU Cottbus) for providing his namelist, Andreas Will (BTU Cottbus) for the helpful suggestions and the ARPA Emilia Romagna, in particular Carlo Cacciamani for the helpful suggestions and G.Antolini, R.Tomozeiu, M.S.Tesini for providing the ARPAEMR dataset.
This report represents the Deliverable P15 developed within the framework of Work Package 6.2.2 of the GEMINA project, funded by the Italian Ministry of Education, University and Research and the Italian Ministry of Environment, Land and Sea.