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RESEARCH PRODUCT

Définition d’un événement de poussières désertiques au Sahel : apport de nouvelles mesures de PM10 au Burkina Faso.

subject

description

This study isdedicated to the desert dust of the dry season in an inhabited Sahelian rural area whose populations are widely exposed tosanitary risks such as meningitis outbreaks (Martiny & Chiapello, 2013). Here, the objective is to give a definition of a dust“event”, a concept describing the dustiest moments in a dusty environment, but that remains rather unclear, notably becauseof the lack of ground-truth measurements. The analysis of new PM10 measurements in Burkina Faso has enabled us to definethe dust events as episodes which experience concentrations greater than 189μg/m3 for at least 10h. Five types of dust eventshave been defined depending on the concentrations measured. On the first trimester of the year 2013, a total of 11 eventshave been recorded in Dedougou, and among them, 4 have been classified as intense, very intense or extreme events.