Comparison Between SMOS, VUA, ASCAT, and ECMWF Soil Moisture Products Over Four Watersheds in U.S

Comparison Between SMOS, VUA, ASCAT, and ECMWF Soil Moisture Products Over Four Watersheds in U.S

As part of the Soil Moisture and Ocean Salinity (SMOS) validation process, a comparison of the skills of three satellites [SMOS, Advanced Microwave Scanning Radiometer-Earth Observing System (AMSR-E) or Advanced Microwave Scanning Radiometer, and Advanced Scatterometer (ASCAT)], and one-model Europe...

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Bibliographic Details
Published in:IEEE transactions on geoscience and remote sensing Vol. 52; no. 3; pp. 1562 - 1571
Main Authors: Leroux, Delphine J., Kerr, Yann H., Al Bitar, Ahmad, Bindlish, Rajat, Jackson, Thomas J., Berthelot, Beatrice, Portet, Gautier
Format: Journal Article
Language:English
Published: New York, NY IEEE 01-03-2014
Institute of Electrical and Electronics Engineers
Subjects:
Applied geophysics
Earth sciences
Earth, ocean, space
Ecology, environment
Ecosystems
Exact sciences and technology
Internal geophysics
Life Sciences
Soil moisture
Soil Moisture and Ocean Salinity (SMOS)
validation
microwaves
models
salinity
soil moisture
Earth Observing System
Space remote sensing
satellite measurements
networks
Soil Moisture and Ocean Salinity (SMOS)
drainage basins
correlation
correlation coefficient
calibration
errors
validation
Soil moisture
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Summary:As part of the Soil Moisture and Ocean Salinity (SMOS) validation process, a comparison of the skills of three satellites [SMOS, Advanced Microwave Scanning Radiometer-Earth Observing System (AMSR-E) or Advanced Microwave Scanning Radiometer, and Advanced Scatterometer (ASCAT)], and one-model European Centre for Medium Range Weather Forecasting (ECMWF) soil moisture products is conducted over four watersheds located in the U.S. The four products compared in for 2010 over four soil moisture networks were used for the calibration of AMSR-E. The results indicate that SMOS retrievals are closest to the ground measurements with a low average root mean square error of 0.061 m 3 ·m -3 for the morning overpass and 0.067 m 3 ·m -3 for the afternoon overpass, which represents an improvement by a factor of 2-3 compared with the other products. The ECMWF product has good correlation coefficients (around 0.78) but has a constant bias of 0.1-0.2 m 3 ·m -3 over the four networks. The land parameter retrieval model AMSR-E product gives reasonable results in terms of correlation (around 0.73) but has a variable seasonal bias over the year. The ASCAT soil moisture index is found to be very noisy and unstable.
ISSN:0196-2892
1558-0644
DOI:10.1109/TGRS.2013.2252468