Journal
ATMOSPHERIC SCIENCE LETTERS
Volume 12, Issue 1, Pages 24-30Publisher
WILEY-BLACKWELL
DOI: 10.1002/asl.287
Keywords
equatorial Atlantic; cold tongue; West African monsoon
Funding
- EU [AMMA (004089-2)]
- AMMA project
- Deutsche Bundesministerium fur Bildung und Forschung as part of the Verbundvorhaben Nordatlantik [03F0443B]
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Zonal wind anomalies in the western equatorial Atlantic during late boreal winter to early summer precondition boreal summer cold/warm events in the eastern equatorial Atlantic (EEA) that manifest in a strong interannual Atlantic cold tongue (ACT) variability. Local intraseasonal wind fluctuations, linked to the St. Helena anticyclone, contribute to the variability of cold tongue onset and strength, particularly during years with preconditioned shallow thermoclines. The impact of cold tongue sea surface temperature (SST) anomalies on the wind field in the Gulf of Guinea is assessed. It contributes to the northward migration of humidity and convection and possibly the West African monsoon (WAM) jump. Copyright (C) 2010 Royal Meteorological Society
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