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Communication incl. Poster: BibTeX citation key:  Fayeb
Faye, S., Sow, B. A. & Lazar, A. 2009. Simulation of the senegalo-mauritanian upwelling: How are the winds actually driving SST variability and water mass renewal? Work presented at Third International AMMA Conference, July 20—24, at Ouagadougou, Burkina Faso.
Added by: roussot 2009-10-22 22:52:17
Categories: Atmospheric processes, Ocean processes
Creators: Faye, Lazar, Sow
Publisher: African Monsoon Multidisciplinary Analyses (Ouagadougou, Burkina Faso)
Collection: Third International AMMA Conference

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The senegalo-mauritanian waters display the highest SST seasonal variance of the tropical Atlantic. It is primarily resulting from the combination of upwelling favorable trades and the ITCZ migration movements. In this preliminary work, based on a ¼° OGCM, we carried out a first order off-line computation of the heat budget terms aimed at estimating the actual way Ekman pumping and other processes control the SST high variance.
We find that throughout the year, and even during the cold winter season, the major mixed layer heat balance seems rather to hold between horizontal advection by Ekman and coastal currents and spatially and temporally highly variables air-sea heat fluxes. In a comparable way, the water renewal at the coast seems rather carried out by the jet than by vertical currents. The role of the upwelling is however important for both quantities since it explains the mean SST gradients and the coastal jet. These results are naturally subject to model and forcing errors, hence a model intercomparison is underway.
Added by: roussot