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Article Dans Une Revue Atmospheric Science Letters Année : 2011

Intraseasonal variability of the West African monsoon

Gaëlle de Coëtlogon
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Flore Mounier
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Romain Roehrig

Résumé

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.

Domaines

Météorologie
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Dates et versions

hal-00548109 , version 1 (09-12-2020)

Identifiants

Citer

Serge Janicot, Guy Caniaux, Fabrice Chauvin, Gaëlle de Coëtlogon, Bernard Fontaine, et al.. Intraseasonal variability of the West African monsoon. Atmospheric Science Letters, 2011, 12 (1), pp.58-66. ⟨10.1002/asl.280⟩. ⟨hal-00548109⟩
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