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Communication incl. Poster: BibTeX citation key:  Hagosa
Hagos, S. M. & Zhang, C. 2009. Land-sea contrast in latent heating profiles and implications for African Monsoon Dynamics. Work presented at Third International AMMA Conference, July 20—24, at Ouagadougou, Burkina Faso.
Added by: Devic 2009-09-23 11:38:56    Last Edited by: roussot 2009-10-16 16:32:14
Categories: General, Monsoon system and its variability
Keywords: Atmospheric Boundary Layer, Precipitation, Seasonal cycle
Creators: Hagos, Zhang
Publisher: African Monsoon Multidisciplinary Analyses (Ouagadougou, Burkina Faso)
Collection: Third International AMMA Conference

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Analysis of latent heating profiles retrieved from the Tropical Rainfall Measuring Mission (TRMM) observations show a sharp contrast between latent heating profiles over the West Africa and Atlantic ITCZ. The continental latent heating profiles are generally top-heavy with a single peak near 400 hpa, while over the Atlantic, there is a secondary peak near 700 hPa associated with shallow convection. In light of previous results that show the importance of latent heating in local precipitation-circulation feedback through moisture convergence, this study aims to identify the role of the observed variations in their profiles during monsoon seasonal cycle using a regional model based on the Advanced Research WRF and the TRMM retrieved heating data.
The model is run over a domain including the West African region and tropical Eastern Atlantic with and without land-sea contrast in latent heating profiles based on the TRMM observations. Preliminary results show that precipitation-moisture convergence feedback associated top-heavy profiles is weaker than those involving shallow heating. The implications of these variations in profiles and associated changes in moisture convergence on monsoon dynamics will be discussed.
Last Edited by: roussot