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
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Published:2021-07-02
Issue:7
Volume:14
Page:4159-4185
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ISSN:1991-9603
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Container-title:Geoscientific Model Development
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language:en
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Short-container-title:Geosci. Model Dev.
Author:
Anav AlessandroORCID, Carillo Adriana, Palma Massimiliano, Struglia Maria Vittoria, Turuncoglu Ufuk Utku, Sannino GianmariaORCID
Abstract
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 system is made up of two interchangeable
regional climate models as atmospheric components (RegCM, REGional Climate Model, and WRF, Weather Research and Forecasting), a river
model (Hydrological Discharge, HD), and an ocean model (Massachusetts Institute of
Technology General Circulation Model, MITgcm); processes taking place at the land
surface are represented within the atmospheric models with the possibility
to use several land surface schemes of different complexity. The coupling
between these components is performed through the RegESM driver. Here, we present and describe our regional Earth system model and evaluate
its components using a multidecadal hindcast simulation over the period
1980–2013 driven by ERA-Interim reanalysis. We show that the atmospheric
components correctly reproduce both large-scale and local features of the
Euro-Mediterranean climate, although we found some remarkable biases: in
particular, WRF has a significant cold bias during winter over the
northeastern bound of the domain and a warm bias in the whole continental
Europe during summer, while RegCM overestimates the wind speed over the
Mediterranean Sea. Similarly, the ocean component correctly reproduces the analyzed ocean
properties with performances comparable to the state-of-art coupled regional
models contributing to the Med-CORDEX initiative. Our regional Earth system model allows studying the Euro-Mediterranean
climate system and can be applied to both hindcast and scenario simulations.
Funder
National Center for Atmospheric Research
Publisher
Copernicus GmbH
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