%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Janicot, Serge
%A Caniaux, G.
%A Chauvin, F.
%A de Coëtlogon, G.
%A Fontaine, B.
%A Hall, N.
%A Kiladis, G.
%A Lafore, J. P.
%A Lavaysse, C.
%A Lavender, S. L.
%A Leroux, S.
%A Marteau, R.
%A Mounier, F.
%A Philippon, N.
%A Roehrig, R.
%A Sultan, Benjamin
%A Taylor, C. M.
%T Intraseasonal variability of the West African monsoon
%B Monsoon Multidisciplinary Analysis (AMMA) : an integrated project for understanding of the West African climate system and its human dimension
%D 2011
%L fdi:010053181
%G ENG
%J Atmospheric Science Letters
%@ 1530-261X
%K West African monsoon ; intraseasonal variability ; monsoon onset ; predictability ; crop yield
%M ISI:000287816700011
%N 1
%P 58-66
%R 10.1002/asl.280
%U https://www.documentation.ird.fr/hor/fdi:010053181
%> https://www.documentation.ird.fr/intranet/publi/2011/03/010053181.pdf
%V 12
%W Horizon (IRD)
%X The intraseasonal time scale is critical in West Africa where resources are highly rainfall dependent. Three main modes of variability have been identified, two with a mean periodicity of 15 days and one with a mean periodicity around 40 days. These modes have a regional scale and can strongly influence precipitation and convective activity. They are mainly controlled by atmospheric dynamics and land-surface interactions. They can also modulate the very specific phase of the African summer monsoon onset. A better knowledge of the mechanisms controlling this scale is necessary to improve its predictability. Copyright.
%$ 021 ; 032