Analysis of ERS wind scatterometer time series over Sahel (Mali)

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dc.creatorJarlan, L.
dc.creatorMougin, E.
dc.creatorFrison, P.L.
dc.creatorMazzega, P.
dc.creatorHiernaux, Pierre H.Y.
dc.date2002-08
dc.date2013-07-03T05:26:06Z
dc.date2013-07-03T05:26:06Z
dc.date.accessioned2026-06-27T16:38:30Z
dc.descriptionERS wind scatterometer (WSC) time series are analyzed over different ecoclimatic regions of the African Sahel during the period 1991–1995. At 45° incidence angle, the strong seasonality of o time series can be directly linked to the successive wet and dry seasons. Moreover, the annual o dynamic range was found to be strongly correlated to total rainfall. The interpretation of the o temporal plots is carried out by combining a backscattering model to a grassland growth model. Results highlight the decreasing contribution of the herbaceous component with latitude. However, its contribution is far from negligible and can reach 60% in the Soudano-Sahelian subzone at peak herbaceous mass. Additionally, the tree layer has a negligible effect on the radar signal at the scale of a resolution cell. Finally, a simple parametric backscattering model is calibrated and used in an inversion process. The resolution of the inverse problem is based on a `brute-force' method that consists of exploring all the combinations of parameters of interest. Despite a poor estimation of the temporal variation of the herbaceous mass Bt, the retrieved maximum mass compares well with ground estimates.
dc.identifierhttps://hdl.handle.net/10568/33133
dc.identifier.urihttp://hdl.handle.net/123456789/129013
dc.languageen
dc.publisherElsevier
dc.rightsLimited Access
dc.sourceRemote Sensing of Environment;81(2-3): 404-415
dc.subjectclimate
dc.subjectwinds
dc.subjectmodels
dc.subjectgeology
dc.titleAnalysis of ERS wind scatterometer time series over Sahel (Mali)
dc.typeJournal Article

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Instituto Internacional de Investigaciones Pecuarias (ILRI)