Reference : Gravity Changes due to Continental Water Storage
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
Physical, chemical, mathematical & earth Sciences : Physics
Gravity Changes due to Continental Water Storage
van Dam, Tonie mailto [European Center for Geodynamics and Seismology and The Luxembourg National Museum of Natural History, Walferdange, Luxembourg]
Wahr, John M. [Department of Physics and CIRES, University of Colorado, Boulder, Colorado]
Milly, P. Chris D. [U.S. Geological Survey and GFDL/NOAA, Princeton, New Jersey]
Francis, Olivier mailto [Institut Superieur de Technologie, Luxembourg]
Journal of the Geodetic Society of Japan
[en] environmental loading ; gravity changes
[en] Five years of global continental water storage variations are used to predict the effects of long-wavelength, long-period variability in water storage on gravity observations. At the sites of existing superconducting gravimeters, the modeled gravity changes have root-mean-square (RMS) values of as much as 7 mu Gals, with ranges of up to 22 mu Gals. Variations much larger than these values can be found over large regions the globe. We find that the gravity effects are predominantly annual in character. We also find that the modeled responses to water loading exhibit long-period variations that could be mistaken for secular tectonic trends when observed over a time span of a few years.
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