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| Titel |
Mapping surface soil moisture over the Gourma mesoscale site (Mali) by using ENVISAT ASAR data |
| VerfasserIn |
F. Baup, E. Mougin, P. Rosnay, P. Hiernaux, F. Frappart, P. L. Frison, M. Zribi, J. Viarre |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 15, no. 2 ; Nr. 15, no. 2 (2011-02-18), S.603-616 |
| Datensatznummer |
250012648
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| Publikation (Nr.) |
 copernicus.org/hess-15-603-2011.pdf |
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| Zusammenfassung |
| The potentialities of ENVISAT ASAR (Advanced Synthetic Aperture Radar)
multi-angle data for mapping surface soil moisture (SSM) in Sahelian rangelands
are investigated at medium scale (30 000 km2). The Wide Swath data are
selected to take advantage of their high temporal repetitivity (about 8 days
at the considered scale) associated to a moderate spatial resolution (150 m).
In the continuity of previous studies conducted at a local scale in the same
region, SSM maps are here processed over the whole AMMA Gourma mesoscale site
at 1 km resolution scale. Overall, the generated maps are found to be in good
agreement with field data, EPSAT-SG (Estimation des Pluies par SATellite –
Second Generation) rainfall estimates and ERS (European Remote Sensing) Wind
Scatterometer (WSC) SSM products. The present study shows that the spatial
pattern of SSM can be realistically estimated at a kilometric scale. The
resulting SSM maps are expected to provide valuable information for
initialisation of land surface models and the estimation of the spatial
distribution of radiative fluxes. Particularly, SSM maps could help to
desaggregate low-resolution products such as those derived from WSC data. |
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