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Titel Extreme rainfall in South East France: added value of a convection-permitting regional climate model
VerfasserIn Antoinette Alias, Michel Déqué, Samuel Somot
Konferenz EGU General Assembly 2016
Medientyp Artikel
Sprache en
Digitales Dokument PDF
Erschienen In: GRA - Volume 18 (2016)
Datensatznummer 250131610
Publikation (Nr.) Volltext-Dokument vorhandenEGU/EGU2016-12038.pdf
 
Zusammenfassung
EURO-CORDEX simulations are based on 12 km numerical model. They represent with some accuracy, compared to global coupled models used in CMIP, the surface elevation in mountainous regions. As a consequence, the geographical distribution of precipitation is better at regional scale, and the frequency of high precipitation is more realistic. However these models do not explicitly resolve the convective phenomena which are responsible for the heavy accumulated rainfall. Arome model is derived from Aladin model (used in EURO-CORDEX) but uses non-hydrostatic equations, 2.5 km horizontal resolution, and a dedicated set of physical parameterizations. Its domain covers South-East France, a region which undergoes severe rainfall events in autumn. We present ERA-interim driven simulations with Aladin (12 km) driving Arome (2.5 km). The analysis is focussed on daily and hourly precipitation in extended autumn (ASOND) in the central part of the domain. We compare Aladin (i.e. EURO-CORDEX) and Arome simulations in their ability to simulate observed data.