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Centre d'études spatiales de la biosphère |  |
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Centre d'études spatiales de la biosphère | |
| HAL: hal-00651089, version 1 |
| DOI: 10.1051/LHB/2010059 |
| Detailed view |  Export this paper |
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| Houille Blanche (2010) 87-90 |
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| Importance de la paramétrisation hydrodynamique des premiers centimètres du sol pour la modélisation des flux de surface en Afrique de l'ouest (Importance of topsoil hydrodynamic parameterization for modeling land surface fluxes in West Africa) |
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| Simon Gascoin 1, 2 |
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| (2010) |
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| Land-atmosphere coupling is critical to understand climate variability in West Africa, including the Sahel drought. Among land surface processes, hydrological processes play a major role. In the Sahel water fluxes are controlled by the soil surface layer properties. Using a land surface model we show that it is possible to improve the energy partitioning between latent and sensible heat fluxes by decreasing the water exchanges through the soil surface layer. A sensitivity test reveals that such a calibration would strongly modify the energy budget of West African surface as calculated by the default parameterization, in particular in the Sahel region where the bare soil fraction is large, which demonstrates the importance of topsoil hydrodynamic for climate modeling in this region. |
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| 1: | Centre d'études spatiales de la biosphère (CESBIO) |
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CNRS : UMR5126 – Institut de recherche pour le développement [IRD] – CNES – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III |
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| 2: | Structure et fonctionnement des systèmes hydriques continentaux (SISYPHE) |
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Université Pierre et Marie Curie [UPMC] - Paris VI – CNRS : UMR7619 – EPHE – MINES ParisTech - École nationale supérieure des mines de Paris |
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| Subject | : | Sciences of the Universe/Earth Sciences/Hydrology Sciences of the Universe/Continental interfaces, environment Environmental Sciences/Global Changes |
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| hal-00651089, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00651089 | |
| oai:hal.archives-ouvertes.fr:hal-00651089 | |
| From: Simon Gascoin | |
| Submitted on: Monday, 12 December 2011 17:58:24 | |
| Updated on: Monday, 12 December 2011 19:59:38 | |
