Intéraction Mousson/Harmattan, échanges de petite échelle

Abstract : Entrainment of dry air from the Harmattan flow inside the moist monsoon flow is a turbulent process. This process is analysed in the context of the AMMA (African Monsoon Multidisciplinary Analysis) campaign experiment, which aimed at better understanding and forecasting the African Monsoon. The atmospheric measurements made by the ATR-42 research aircraft, and large eddy simulations enable us in a complementary way to study the mean and turbulent vertical structure of the sahelian boundary layer, to describe the dry intrusions and their contributions in the turbulent transferts, to quantify the entrainment process, to test the existing parametrizations and to link the entrainment process with the conditions, and with the characteristics of the boundary layer and its interfaces, in particular the windshear between monsoon & Harmattan.
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Submitted on : Tuesday, September 28, 2010 - 4:06:27 PM
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Guylaine Canut. Intéraction Mousson/Harmattan, échanges de petite échelle. Climatologie. Université Paul Sabatier - Toulouse III, 2010. Français. ⟨tel-00521828⟩

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