The ENEA-REG system (v1.0), a multi-component regional Earth system model: sensitivity to different atmospheric components over the Med-CORDEX (Coordinated Regional Climate Downscaling Experiment) region

Abstract. In this study, a new regional Earth system model is developed and applied to the Med-CORDEX (Coordinated Regional Climate Downscaling Experiment) region. The ENEA-REG made up of two interchangeable climate models as atmospheric components (RegCM, REGional Model, WRF, Weather Research Forecasting), river (Hydrological Discharge, HD), an ocean (Massachusetts Institute Technology General Circulation MITgcm); processes taking place at land surface are represented within with possibility use several schemes different complexity. coupling between these performed through RegESM driver. Here, we present describe our evaluate its using multidecadal hindcast simulation over period 1980–2013 driven by ERA-Interim reanalysis. We show that correctly reproduce both large-scale local features Euro-Mediterranean climate, although found some remarkable biases: in particular, WRF has significant cold bias during winter northeastern bound domain warm whole continental Europe summer, while RegCM overestimates wind speed Mediterranean Sea. Similarly, component reproduces analyzed properties performances comparable state-of-art coupled contributing initiative. Our allows studying can be scenario simulations.