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| Titel |
Soil moisture active and passive microwave products: intercomparison and evaluation over a Sahelian site |
| VerfasserIn |
C. Gruhier, P. Rosnay, S. Hasenauer, T. Holmes, R. Jeu, Y. Kerr, E. Mougin, E. Njoku, F. Timouk, W. Wagner, M. Zribi |
| 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 ; 14, no. 1 ; Nr. 14, no. 1 (2010-01-22), S.141-156 |
| Datensatznummer |
250012152
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| Publikation (Nr.) |
 copernicus.org/hess-14-141-2010.pdf |
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| Zusammenfassung |
| This paper presents a comparison and an evaluation of five soil moisture products
based on satellite-based passive and active microwave measurements. Products are evaluated
for 2005–2006 against ground measurements obtained from the soil moisture network
deployed in Mali (Sahel) in the framework of the African Monsoon Multidisciplinary
Analysis project. It is shown that the accuracy of the soil moisture products is
sensitive to the retrieval approach as well as to the sensor type (active or passive)
and to the signal frequency (from 5.6 GHz to 18.8 GHz). The spatial patterns of
surface soil moisture are compared between the different products at meso-scale
(14.5° N–17.5° N and 2° W–1° W). A general good
consistency between the different satellite soil moisture products is shown in terms
of meso-scale spatial distribution, in particular after convective rainfall occurrences.
Comparison to ground measurement shows that although soil moisture products obtained
from satellite generally over-estimate soil moisture values during the dry season,
most of them capture soil moisture temporal variations in good agreement with ground
station measurements. |
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