DATE2016-05-31 09:39:52
AUTHORSNadia Politi (1,2), Panagiotis T. Nastos (2), Athanasios Sfetsos (1), Diamando Vlachogiannis (1), Nikolas R. Dalezios (3), John Kapsomenakis (4)
  1. Environmental Research Laboratory, Inrastes, Ncsr Demokritos Athens (Greece)
  2. Laboratory Of Climatology And Atmospheric Environment, Department Of Geology And Geoenvironment, National And Kapodistrian University Of Athens Athens (Greece)
  3. Laboratory Of Hydrology, Department Of Civil Engineering, University Of Thessaly Volos (Greece)
  4. Research Center For Atmospheric Physics And Climatology, Academy Of Athens Athens (Greece)
ABSTRACTClimate change is a widely discussed environmental issue in recent times. Large parts of Europe, including the region of the Mediterranean basin are especially responsive to global change through extreme weather events, as heat waves and decreased precipitation. According to the simulations of regional climate models (SRES A1B) over Mediterranean in 2080-2099, precipitation will shift northwards resulting in a decrease of more than 20% over the period 1980-1999 at the south parts. Towards this assumption, negative trends of consecutive wet days, mainly in the western region of Greece, are likely to appear. In the present study, the dynamical downscaling technique was applied in the Advanced Weather Research and Forecasting numerical model WRF-ARW, in order to investigate and validate the performance of seven different combinations of physics parameterizations. The WRF model, was forced by ERA-INTERIM reanalysis data, for a short period of one year (January 2002-December 2002), over the European domain of 20km horizontal resolution, downscaled to the domain of Greece with grid spacing of 5km. Simulations with selected combinations of parameterization schemes among two Planetary Boundary Layers parameterizations, along with the corresponding Surface Layer schemes, as well as, four Cumulus physics schemes and three Microphysics options were investigated. The results of the model simulations were validated to all available station measurements of daily precipitation and 2-meter air temperature from the European Climate Assessment and Dataset (ECA&D), by utilizing statistical metrics and Taylor diagrams for the domain of Greece. The study led to a more reliable choice of physics configurations schemes for the WRF model, in order to simulate future climate model experiments to assess the impact of climate change over the domain of interest.