Contrasted land-surface processes along the West African rainfall gradient - Monsoon Multidisciplinary Analysis (AMMA) : an integrated project for understanding of the West African climate system and its human dimension - IRSTEA - Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (<b>anciennement Cemagref</b>)
Article Dans Une Revue Atmospheric Science Letters Année : 2011

Contrasted land-surface processes along the West African rainfall gradient - Monsoon Multidisciplinary Analysis (AMMA) : an integrated project for understanding of the West African climate system and its human dimension

L. Seguis
Bernard Cappelaere
Éric Mougin
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Christophe Peugeot
Josiane Seghieri
Franck Timouk
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Jérôme Demarty
Manuela Grippa
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Matthieu Le Lay
Sylvain Massuel

Résumé

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.
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ird-02153235 , version 1 (12-06-2019)
ird-02153235 , version 2 (24-07-2021)

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L. Seguis, N. Boulain, Bernard Cappelaere, J.M. Cohard, Guillaume Favreau, et al.. Contrasted land-surface processes along the West African rainfall gradient - 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), pp.31-37. ⟨10.1002/asl.327⟩. ⟨ird-02153235v2⟩
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