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Archive Ouverte HAL-IRD |  |
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Archive Ouverte HAL-IRD | |
| HAL : ird-00406277, version 1 |
| DOI : 10.1016/j.jhydrol.2008.11.046 |
| Code IRD Horizon : fdi:010048243 |
| Fiche détaillée |  Récupérer au format |
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| Journal of Hydrology 375, 1-2 (2009) 253-261 |
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| ERS scatterometer surface soil moisture analysis of two sites in the south and north of the Sahel region of West Africa |
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Mehrez Zribi 1, 2, 3Mickaël Pardé 1, 3 |
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| (30/08/2009) |
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| The analysis of feedback effects between continental surfaces and the atmosphere is a key element in the understanding of African monsoon dynamics. For this reason, the monitoring of surface parameters, in particular soil moisture, is essential. Satellite remote sensing appears to be the most suitable means of obtaining data relevant to such parameters. The present paper presents the results of statistical analysis of soil moisture products based on data recorded by the ERS scatterometer, over the period 1992-2006, from two sites in Niger and Mali in the Sahel climatic region. Soil moisture products were validated over these two sites using ground data measurements and ASAR/ENVISAT estimations. The soil moisture distribution during the monsoon period is described, and the temporal correlation between estimated soil moisture levels is computed. Finally, the dynamics of cells corresponding to precipitation events and high surface moisture values were evaluated in the studied regions, thereby revealing variations during the monsoon period as well as site specific trends |
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| 1 : | Centre d'étude des environnements terrestre et planétaires (CETP) |
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CNRS : UMR8639 – INSU – Université de Versailles Saint-Quentin-en-Yvelines |
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| 2 : | 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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| 3 : | Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) |
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CNRS : UMR8190 – Université Pierre et Marie Curie [UPMC] - Paris VI – Université de Versailles Saint-Quentin-en-Yvelines – INSU |
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| 4 : | European Centre for Medium Range Weather Forecast (ECMWF) |
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ECMWF |
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| 5 : | Hydrosciences Montpellier (HSM) |
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CNRS : UMR5569 – Institut de recherche pour le développement [IRD] – Université Montpellier II - Sciences et techniques |
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| 6 : | Laboratoire d'étude des transferts en hydrologie et environnement (LTHE) |
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CNRS : UMR5564 – OSUG – INSU – Université Joseph Fourier - Grenoble I – Institut National Polytechnique de Grenoble (INPG) – Institut de recherche pour le développement [IRD] : UR012 |
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| 7 : | Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE) |
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CNRS : UMR8212 – CEA : DSM/LSCE – Université de Versailles Saint-Quentin-en-Yvelines |
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| domaine | : | Sciences du Vivant/Ecologie, Environnement/Ecosystèmes |
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| Soil moisture – Time series analysis – Radar – ERS scatterometer – Western Africa |
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| Liste des fichiers attachés à ce document : | |||||
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| ird-00406277, version 1 | |
| http://hal.ird.fr/ird-00406277 | |
| oai:hal.ird.fr:ird-00406277 | |
| Contributeur : Dominique Bruel | |
| Soumis le : Mardi 21 Juillet 2009, 17:35:31 | |
| Dernière modification le : Samedi 9 Mars 2013, 11:37:14 | |
