Μελέτη της επίδρασης οριακών συνθηκών σε περιοχικές κλιματικές προσομοιώσεις και αξιολόγηση με δορυφορικά δεδομένα

Περίληψη

In this thesis, two regional climate simulations, which differ only in the initial and boundary conditions, are evaluated and the impact of the different boundary conditions on the model climatology is investigated. The scientific aim is to understand how a regional climate model is forced by a general circulation model and quantify this impact on basic climate parameters. The simulations have been performed with the regional climate model WRF (WRF-ARW) version 3.7.1 with a special resolution of 0.44°. Two climate simulations were performed: one hindcast, driven by the ERA-Interim reanalysis, and one historical, driven by the NASA GISS ModelE2, during the period 1990-2008 and covering the European region. The two simulations are evaluated with the EOBS climatology for temperature and precipitation and with satellite data for surface downward longwave and shortwave radiation and cloud fractional cover. The results showed that both simulations are colder (1.6°C for the hindcast simulation and 4.5°C for the historical simulation on average over Europe) and wetter (0.1 mm/day for the hindcast simulation and 1,4 mm/day for the control simulation on average over Europe) than the EOBS climatology. ...