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Analysis of rainfall simulated by CORDEX regional climate models over West Africa Volume 24, issue 1, Janvier-Février-Mars 2013

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Université de Ziguinchor UFR sciences et technologies Laboratoire d’océanographie, des sciences de l’environnement et du climat (LOSEC) BP 523 Ziguinchor Sénégal, Laboratoire d’étude des transferts en hydrologie et environnement (LTHE) Domaine universitaire Bâtiment OSUG-B 460, rue de la piscine 38400 Saint-Martin-d’Hères France, Université de Ziguinchor UFR sciences et technologies Département de géographie BP 523 Ziguinchor Sénégal, Laboratoire de physique de l’atmosphère et de l’océan - Siméon Fongnang BP 5085 Dakar-Fann Sénégal

This work aims at analysing and inter-comparing the performance over West Africa of nine regional climate models (RCMs) used in the framework of the COordinated Regional climate Downscaling EXperiment (CORDEX) program. The CORDEX program is a coordinated experiment involving many research centres throughout the world, which aims at simulating the future climate. This program provides high-resolution climate change scenarios for impact studies over large portions of the world using RCMs. Data analysed in this study are present-day simulations. These runs cover the period 1989-2008 and the driving fields (lateral boundary conditions) are from the Era-Interim reanalysis. The seasonal and diurnal cycles of the rainfall and hydroclimatic events simulated by RCMs are analysed and compared to available observation data.