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Communication incl. Poster: BibTeX citation key:  Flamantb
Flamant, C., Parker, D. J., Knippertz, P., Lavaysse, C. & Chaboureau, J.-P. 2009. The impact of African Easterly Waves on the Sahelian planetary boundary layer structure, thermodynamics and dust aerosol content. Work presented at Third International AMMA Conference, July 20—24, at Ouagadougou, Burkina Faso.
Added by: Devic 2009-10-12 10:33:21    Last Edited by: roussot 2009-10-16 16:30:40
 B  
Categories: Aerosol and Chemistry, Atmospheric processes
Creators: Chaboureau, Flamant, Knippertz, Lavaysse, Parker
Publisher: African Monsoon Multidisciplinary Analyses (Ouagadougou, Burkina Faso)
Collection: Third International AMMA Conference

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Abstract
In this paper we analyse aircraft observations (airborne lidar and dropsondes) acquired from a sequence of four flights performed in the framework of the AMMASOP (African Monsoon Multidisciplinary Analysis Special Observing Period) with the SAFIRE (Service des Avions Français Instrumentés pour la Recherche en Environnement) Falcon 20 (F/F20) between 8 and 12 June 2006. In the course of the four flights, the F/F20 flew in different phases of an AEW (i.e. south and north sectors, as well as the ridge of the AEW) over Western Niger and Eastern Mali. On one of the flights (i.e. 8 June), deep convection initiated in the south sector of the AEW, to the north of the flight track and just West of the Aïr mountains. The sequence of flights also was conducted during a major dust mobilisation episode over the Bodélé region (Chad) and Sudan, and subsequent westward transport by the African easterly jet (AEJ). The objectives of the paper are: (i) analyse the dynamics and the thermodynamics of Sahelian planetary boundary layer (PBL) as well as its structure over the Sahel in the different phases of an AEW; (ii) assess the link between the Sahelian PBL thermodynamics and moist convection in the different phases of an AEW; and (iii) evidence the influence of AEWs on the transport of mineral dust from the Sahara across West Africa.
Last Edited by: roussot