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Accession Number N20120013591
Title Assimilation of Passive and Active Microwave Soil Moisture Retrievals.
Publication Date Jul 2012
Media Count 4p
Personal Author C. S. Draper G. J. M. DeLannoy Q. Liu R. H. Reichle
Abstract 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.
Keywords Assimilation
Control surfaces
Earth surface
Microwaves
Moisture
Remote sensing
Scatterometers
Soil moisture
Surface energy

 
Source Agency National Aeronautics and Space Administration
NTIS Subject Category 48 - Natural Resources & Earth Sciences
48C - Natural Resource Surveys
Corporate Author Goddard Space Flight Center, Greenbelt, MD.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1306
Contract Number N/A

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