Extrêmes pluviométriques au Sahel : tendances et contrastes régionaux

Théo Vischel, chercheur à l’IGE Grenoble

mercredi 31 mai 2017, à 9 heures, salle de séminaire du CRC

Standardized rainfall index computed for the period 1950–2002: (a) over the whole Sahel (limits: 20°W–20°E; 10°N–20°N), using the 85-station synoptic network; (b) at the Niamey Airport station. The two phases, wet and dry, appear more clearly on the Sahelian index than on the Niamey index. This is a consequence of the high spatial variability of rainfall regime leading to a single station having a behaviour significantly and randomly different from the regional pattern.

extrait:

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Extrêmes pluviométriques au Sahel : tendances et contrastes régionaux

Théo Vischel, chercheur à l'IGE Grenoble

mercredi 31 mai 2017, à 9 heures, salle de séminaire du CRC

Standardized rainfall index computed for the period 1950–2002: (a) over the whole Sahel (limits: 20°W–20°E; 10°N–20°N), using the 85-station synoptic network; (b) at the Niamey Airport station. The two phases, wet and dry, appear more clearly on the Sahelian index than on the Niamey index. This is a consequence of the high spatial variability of rainfall regime leading to a single station having a behaviour significantly and randomly different from the regional pattern.

titre:

Extrêmes pluviométriques au Sahel : tendances et contrastes régionaux

intervenant:

Théo Vischel

date:

mercredi 31 mai 2017