Contrasted land-surface processes along the West African rainfall gradient

2011

Article référencé dans le Web of Science WOS:000287816700007

Séguis Luc, Boulain N., Cappelaere Bernard, Cohard J. M., Favreau Guillaume, Galle Sylvie, Guyot A., Hiernaux P., Mougin E., Peugeot Christophe, Ramier D., Seghieri Josiane, Timouk Franck, Demarez V., Demarty Jérome, Descroix Luc, Descloitres Marc, Grippa M., Guichard F., Kamagate B., Kergoat L., Lebel Thierry, Le Dantec V., Le Lay M., Massuel Sylvain, Trichon V.

Monsoon Multidisciplinary Analysis (AMMA) : an integrated project for understanding of the West African climate system and its human dimension

Atmospheric Science Letters, 2011, 12 (1), p. 31-37 ISSN 1530-261X

We review the main results of land-surface studies obtained in the three sites of the long-term observing system AMMA-CATCH. Runoff in the Sahel enhances the variability of energy partitioning between non-infiltrative areas where sensible heat is dominant and infiltrative areas where soil water availability increases the latent flux. In terms of water resources, an increase in runoff over the past 50 years, already reported for the exoreic Sahel, was revealed in the endoreic Sahel. In the Sudanian domain, the subsurface origin of streamflow could explain its decrease over the same period.

Sciences du milieu [021] ; Hydrologie [062] ; Bioclimatologie [072]

SAHEL ; MALI ; ZONE SOUDANOSAHELIENNE

Fonds IRD [F B010053184]

fdi:010053184