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Journal Article: ID no. (ISBN etc.):  0094-8276 BibTeX citation key:  Pellarin2008
Pellarin, T., Ali, A., Chopin, F., Jobard, I. & Bergès, J.-C. (2008) Using spaceborne surface soil moisture to constrain satellite precipitation estimates over West Africa. IN Geophysical Research Letters, 35. L02813.
Added by: Devic 2008-08-20 12:23:08    Last Edited by: Fanny Lefebvre 2011-01-12 17:24:17
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Categories: Environment and Climate Monitoring
Keywords: Precipitation, Satellites
Creators: Ali, Bergès, Chopin, Jobard, Pellarin
Collection: Geophysical Research Letters
Bibliographies: Prior150410

Peer reviewed
Number of views:  1093
Popularity index:  57.71%
Maturity index:  published

 
Abstract
This paper describes a methodology to use the passive microwave measurements of the 6.9 GHz bandwidth of the AMSR-E sensor which is the most sensitive to surface soil moisture, to constrain satellite-based rainfall estimates over a semi arid region in West-Africa. The paper focuses on the aptitude of AMSR-E measurements to inform if rain occurs or not. The study was conducted over a 125 × 100 km2 region located in Niger where a dense recording raingauge network is available to build an accurate ground-based 3-hour rainfall product at the 25 × 20 km2 resolution. A satellite-based rainfall product (EPSAT-SG), based on both infrared and microwave measurements, was compared to the ground-based rainfall product. It was shown that EPSAT-SG overestimates by about 30% the total number of rain events during the 2004 and 2006 rainy seasons. A simple methodology based on the AMSR-E polarization ratio variations related to the surface soil moisture leaded to suppress a large amount of the wrong rain events.
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Last Edited by: Fanny Lefebvre