Journal
ATMOSPHERIC SCIENCE LETTERS
Volume 12, Issue 1, Pages 58-66Publisher
WILEY
DOI: 10.1002/asl.280
Keywords
West African monsoon; intraseasonal variability; monsoon onset; predictability; crop yield
Funding
- AMMA project
- NERC [earth010002, NE/G018499/1] Funding Source: UKRI
- Natural Environment Research Council [NE/B505538/1, earth010002, NE/G018499/1, ceh010023] Funding Source: researchfish
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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. (C) 2010 Royal Meteorological Society
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