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An approach for combining remote sensing spectral measurements with an ecosystem model was presented in an accompanying article. The sahelian grassland ecosystem STEP model developed for that purpose was also described and validated. In order to fulfill a prerequisite for using coarse resolution ...


Seen, D. loMougin, E.Rambal, S.Gaston, A.Hiernaux, Pierre H.Y.[A regional sahelian grassland model to be coupled with multispectral satellite data. II. Toward the control of its simulations by remotely sensed indices]A regional sahelian grassland model to be coupled with multispectral satellite data. II. Toward the control of its simulations by remotely sensed indices

An approach to combining remote sensing spectral measurements with an ecosystem process model is presented. In this approach, the ecosystem model is not bound by the sole use of satellite data, but integrates the latter in an explicit formulation of the main processes of vegetation functioning. A...


Mougin, E.Seen, D. loRumbal, S.Gaston, A.Hiernaux, Pierre H.Y.[A regional sahelian grassland model to be coupled with multispectral satellite data. I. Model description and validation]A regional sahelian grassland model to be coupled with multispectral satellite data. I. Model description and validation

Evaluates relationship between NDVI (nomalized difference vegetation index) and above-ground biomass, between maximum NDVI and end-of-growing season biomass; and between the integral of the NDVI curve or NDVI increments overtime and actual biomass. Describes atmospheric interference and technical...


Hiernaux, Pierre H.Y.[Teledetection de l'evolution des ressources fourrageres par satellite: Progres dans l'etalonnage d'un indice radiometrique et premieres applications au Gourma (Sahel malien)]Teledetection de l'evolution des ressources fourrageres par satellite: Progres dans l'etalonnage d'un indice radiometrique et premieres applications au Gourma (Sahel malien)

This article presents an analysis of ERS-1 wind-scatterometer (WSC) data acquired over a region located in the northern Sahel. The considered period extends from January 1992 to December 1995, that is, covering four vegetation cycles. Experimental observations show that WSC responses at 45° of i...


Frison, P.L.Mougin, E.Hiernaux, Pierre H.Y.[Observations and interpretation of seasonal ERS-1 wind scatterometer data over northern Sahel (Mali)]Observations and interpretation of seasonal ERS-1 wind scatterometer data over northern Sahel (Mali)

Predictions of tree size and density from a remote sensing model were used together with allometric regression equations from the literature to estimate foliage and above-ground woody biomass in sparse woodlands. Study sites with woody cover ranging from 10-50 per cent were located in the Sudania...


Franklin, J.Hiernaux, Pierre H.Y.[Estimating foliage and woody biomass in Sahelian and Sudanian woodlands using a remote sensing model]Estimating foliage and woody biomass in Sahelian and Sudanian woodlands using a remote sensing model

Evaluates relationship between NDVI (nomalized difference vegetation index) and above-ground biomass, between maximum NDVI and end-of-growing season biomass; and between the integral of the NDVI curve or NDVI increments overtime and actual biomass. Describes atmospheric interference and technical...


Hiernaux, Pierre H.Y.[Vegetation monitoring by remote sensing: Progress in calibrating a radiometric index and its application in the Gourma, Mali]Vegetation monitoring by remote sensing: Progress in calibrating a radiometric index and its application in the Gourma, Mali

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