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Nocturnal offshore precipitation near the Mediterranean coast of the Iberian Peninsula
Mazón Bueso, Jordi; Pino González, David
Universitat Politècnica de Catalunya. Departament de Física Aplicada; Universitat Politècnica de Catalunya. DF - Dinàmica No Lineal de Fluids
While nocturnal offshore precipitation, which produces rain cells and bands, has been studied in tropical areas, few studies have analyzed the occurrence of this phenomenon at higher latitudes. Using radar reflectivity, nocturnal rainfall in the western Mediterranean area has been detected near the coast of the Iberian Peninsula and North Africa. More than 50 events have been recorded since 2009. MM5 mesoscale simulations of some of the recorded events allow us to establish that the most likely causes for these precipitation events are: (1) the interaction between cold air masses conducted by drainage and kata- batic winds, and (2) a wetter and warmer synoptic wind. Two different episodes are presented: one in the north- eastern Iberian Peninsula, caused by stratiform clouds, which occurred at the mouths of three rivers; the other case, produced by convective clouds, occurred at the southern Iberian Peninsula and was caused by the drainage winds flowing down from some mountain ranges located close to the coast.
Peer Reviewed
Àrees temàtiques de la UPC::Física
Rain and rainfall -- Mediterranean region
Convective clouds
Attribution-NonCommercial-NoDerivs 3.0 Spain

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