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Accession Number
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N20120013591
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Title
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Assimilation of Passive and Active Microwave Soil Moisture Retrievals.
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Publication Date
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Jul 2012
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Media Count
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4p
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Personal Author
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C. S. Draper G. J. M. DeLannoy Q. Liu R. H. Reichle
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Abstract
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Root-zone soil moisture is an important control over the partition of land surface energy and moisture, and the assimilation of remotely sensed near-surface soil moisture has been shown to improve model profile soil moisture (1). To date, efforts to assimilate remotely sensed near-surface soil moisture at large scales have focused on soil moisture derived from the passive microwave Advanced Microwave Scanning Radiometer (AMSR-E) and the active Advanced Scatterometer ASCAT; together with its predecessor on the European Remote Sensing satellites ERS. The assimilation of passive and active microwave soil moisture observations has not yet been directly compared, and so this study compares the impact of assimilating ASCAT and AMSR-E soil moisture data, both separately and together. Since the soil moisture retrieval skill from active and passive microwave data is thought to differ according to surface characteristics (2), the impact of each assimilation on the model soil moisture skill is assessed according to land cover type, by comparison to in situ soil moisture observations.
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Keywords
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Assimilation
Control surfaces
Earth surface
Microwaves
Moisture
Remote sensing
Scatterometers
Soil moisture
Surface energy
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Source Agency
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National Aeronautics and Space Administration
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NTIS Subject Category
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48 - Natural Resources & Earth Sciences
48C - Natural Resource Surveys
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Corporate Author
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Goddard Space Flight Center, Greenbelt, MD.
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Document Type
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Technical report
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Title Note
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N/A
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NTIS Issue Number
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1306
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Contract Number
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N/A
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