Contrasted land-surface processes along the West African rainfall gradient

L. Séguis, Nicolas Boulain, B. Cappelaere, Jean Martial Cohard, Guillaume Favreau, Sylvie Galle, A. Guyot, P. Hiernaux, É Mougin, C. Peugeot, D. Ramier, Josiane Seghieri, F. Timouk, V. Demarez, J. Demarty, L. Descroix, M. Descloitres, M. Grippa, Francois Guichard, B. KamagatéL Kergoat, T Lebel, V. Le Dantec, M. Le Lay, Sylvain Massuel, V. Trichon

Research output: Contribution to journalReview ArticleResearchpeer-review

21 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)31-37
Number of pages7
JournalAtmospheric Science Letters
Issue number1
Publication statusPublished - Jan 2011
Externally publishedYes


  • Energy fluxes
  • Groundwater
  • Runoff
  • Sahel
  • Sudanian climate
  • Water resources

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