27th Conference on Hurricanes and Tropical Meteorology

9B.1

The interaction of tropical cyclones with the Saharan Air Layer: model case studies from 2004

Sarah Jones, Universitšt Karlsruhe / Forschungszentrum Karlsruhe, Karlsruhe, Germany; and N. Lichtenberger and B. Vogel

It has been suggested that the presence of the Saharan Air Layer in the vicinity of tropical cyclones has a negative impact on tropical cyclone intensity. In the framework of the African Monsoon: Multidisciplinary Analysis (AMMA) programme we are modelling the interaction of the Saharan Air Layer with tropical cyclones using the Lokal-Modell (LM) of the Deutscher Wetterdienst with a module describing the transport of mineral dust. We present results from a period in 2004 in which Hurricanes Danielle, Frances, and Ivan developed from African Easterly Waves moving off the West African coast. We discuss the representation of the cyclogenesis events in a sequence of 3 day forecasts with the LM and describe the transport of mineral dust by the monsoon weather systems during this period. .

Session 9B, Tropical Cyclogenesis I
Wednesday, 26 April 2006, 1:30 PM-3:00 PM, Regency Grand Ballroom

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