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Poster communications

North-West African Upwelling dynamics from physical and biological satellite observations

Abstract : Eastern Boundary Upwelling zones include some of the most productive ecosystems in the world, particularly the North-West (NW) African upwelling which presents one of the world’s major upwelling regions. It is characterized by persistent and variable Upwelling phenomenon almost all around the year. In fact, the North-West African margin is forced by the equator-ward trade winds that lead to the upward pumping of cold and nutrient-rich deep waters. The phenomenon can be identified by seasonally variable low sea surface temperature (SST) and nutrient-rich water in coastal area. At this point, the characterization of coastal Upwelling dynamic has a fundamental importance in the study of productivity enhancement and associated fish management. Based on the use of SST satellite images and Chlorophyll-a concentration, this work aim to study the spatial and temporal variation of the main physical and biological Upwelling patterns. Moreover, the upwelling dynamics in interplay between its spatio-temporal extensions and intensity is explored through a time series of 14 years of weekly thermal satellite data.
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Anass El Aouni, Khalid Minaoui, Khalid Daoudi, Hussein Yahia. North-West African Upwelling dynamics from physical and biological satellite observations. Report of the 4th GEO Blue Planet Symposium, Jul 2018, Toulouse, France. ⟨hal-01968269⟩

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