Physics
Scientific paper
Feb 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30c..11e&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 3, pp. 11-1, CiteID 1111, DOI 10.1029/2002GL016579
Physics
5
Geodesy And Gravity: Crustal Movements-Intraplate (8110), Geodesy And Gravity: Space Geodetic Surveys, Geodesy And Gravity: General Or Miscellaneous, Tectonophysics: Stresses-Crust And Lithosphere
Scientific paper
Two sites of the BARGEN GPS network are located ~30 km south of Great Salt Lake (GSL). Lake-level records since mid-1996 indicate seasonal water elevation variations of ~0.3 m amplitude superimposed on a roughly ``decadal'' feature of amplitude ~0.6 m. Using an elastic Green's function and a simplified load geometry for GSL, we calculate that these variations translate into radial crustal loading signals of +/-0.5 mm (seasonal) and +/-1 mm (decadal). The horizontal loading signals are a factor of ~2 smaller. Despite the small size of the expected loading signals, we conclude that we can observe them using GPS time series for the coordinates of these two sites. The observed amplitudes of the variations agree with the predicted decadal variations to <0.5 mm. The observed annual variations, however, disagree; this difference may be caused by some combination of local precipitation-induced site motion, unmodeled loading from other nearby sources, errors in the GSL model, and atmospheric errors.
Bennett Ryan A.
Davis Joshua L.
Elosegui P.
Mitrovica Jerry X.
Wernicke Brian P.
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