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Communication incl. Poster: BibTeX citation key:  Chauvina
Chauvin, F., Roehrig, R. & Lafore, J.-P. 2009. Are there African monsoon features leading Atlantic tropical cyclogenesis? Work presented at Third International AMMA Conference, July 20—24, at Ouagadougou, Burkina Faso.
Added by: roussot 2009-10-19 15:01:53
Categories: Atmospheric processes
Keywords: Atmospheric Boundary Layer
Creators: Chauvin, Lafore, Roehrig
Publisher: African Monsoon Multidisciplinary Analyses (Ouagadougou, Burkina Faso)
Collection: Third International AMMA Conference

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Atlantic tropical cyclones are one of the major meteorological disasters yielding extreme socio-economic impacts. Most of the strongest ones are known to originate from African Easterly Waves (AEWs) arriving near Cape Verde islands. Nevertheless, among all the AEWs which leave the African continent during the West African Monsoon (WAM) season, only a few degenerate into tropical cyclones. Using the new IBTracks dataset and reanalyzed atmospheric fields at the daily timescale, some of the common atmospheric large-scale conditions over Africa leading to Atlantic cyclogenesis are investigated through a lag-composite method. A specific attention will be dedicated tothe structure of the key WAM actors, such as the Tropical Easterly Jet, the African Easterly Jet, the Saharan Heat Low and the low level monsoon circulation.
This study should help in clarifying the links between African conditions and Atlantic cyclonic activity, and may contribute to a better predictability of such high-impact systems.
Added by: roussot