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Intraseasonal variability of the West African monsoon

Janicot, S.; Caniaux, G; Chauvin, F.; de Coëtlogon, G.; Fontaine, B.; Hall, N.; Kiladis, G.; Lafore, J.-P.; Lavayasse, C.; Lavender, S.L.; Leroux, S.; Marteau, R.; Mounier, F.; Philippon, N.; Roehrig, R.; Sultan, B.; Taylor, C.M.. 2011 Intraseasonal variability of the West African monsoon. Atmospheric Science Letters, 12 (1). 58-66. 10.1002/asl.280

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Abstract/Summary

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

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1002/asl.280
Programmes: CEH Topics & Objectives 2009 - 2012 > Biogeochemistry > BGC Topic 2 - Biogeochemistry and Climate System Processes > BGC - 2.3 - Determine land-climate feedback processes to improve climate model predictions
CEH Sections: Harding (to July 2011)
ISSN: 1530-261X
Additional Keywords: West African monsoon, intraseasonal variability, monsoon onset, predictability, crop yield
NORA Subject Terms: Atmospheric Sciences
Date made live: 15 Mar 2011 12:35
URI: http://nora.nerc.ac.uk/id/eprint/12247

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