Horizon 1 1 17 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES Monsoon Multidisciplinary Analysis (AMMA) : an integrated project for understanding of the West African climate system and its human dimension Atmospheric Science Letters 38-44 soil moisture convection planetary boundary layer 2011 fdi:010053180 ENG Atmospheric Science Letters 1530-261X ISI:000287816700008 1 10.1002/asl.336 https://www.documentation.ird.fr/hor/fdi:010053180 https://www.documentation.ird.fr/intranet/publi/2011/03/010053180.pdf 12 Horizon (IRD) Research into land-atmosphere coupling within the African Monsoon Multidisciplinary Analysis has highlighted the atmospheric impact of soil moisture on space scales of 5 km upwards and time scales of several days. Observational and modelling studies have shown how antecedent rainfall patterns affect new storms in the Sahel. The land feedback operates through various mechanisms, including a direct link to afternoon storm initiation from surface-induced mesoscale circulations, and indirectly via a large-scale moisture transport in the nocturnal monsoon. The results suggest potential for significant improvements in weather forecasting through assimilation of satellite data. Intriguing questions remain about the importance of vegetation memory on seasonal-interannual scales. 021 ; 032 UR012