Mathematics – Logic
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3316401s&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 16, CiteID L16401
Mathematics
Logic
28
Geodesy And Gravity: Time Variable Gravity (7223, 7230), Geodesy And Gravity: Satellite Geodesy: Results (6929, 7215, 7230, 7240), Hydrology: Groundwater Hydrology, Hydrology: Remote Sensing (1640), Hydrology: Soil Moisture
Scientific paper
This study presents the first direct comparison of terrestrial water storage estimates from the Gravity Recovery and Climate Experiment (GRACE) satellite mission to in situ hydrological observations. Monthly anomalies of total water storage derived from GRACE gravity fields are compared with combined soil moisture and groundwater measurements from a network of observing sites in Illinois. This comparison is achieved through the use of a recently developed filtering technique designed to selectively remove correlated errors in the GRACE spectral coefficients. Application of this filter significantly improves the spatial resolution of the GRACE water storage estimates, and produces a time series which agrees quite well (RMS difference = 20.3 mm) with the in situ measurements averaged over an area of ~280,000 km2.
Famiglietti James
Swenson Sean
Wahr John
Yeh Pat J.-F.
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