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Detailed Reference Information |
van Dam, T.M. and Francis, O. (1998). Two years of continuous measurements of tidal and nontidal variations of gravity in Boulder, Colorado. Geophysical Research Letters 25: doi: 10.1029/97GL03780. issn: 0094-8276. |
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We report here on the results of an analysis of 2 years of data from NOAA's superconducting gravimeter located at the Table Mountain Gravity Observatory in Boulder, Colorado. Observed tidal parameters, corrected for ocean loading effects, are compared with theoretical tidal parameters predicted for a non-hydrostatic inelastic Earth model and demonstrate excellent agreement. Tidal residuals, corrected for polar motion and a linear instrument drift are highly correlated with gravity changes measured by two absolute gravimeters over the same time period. The admittance to local pressure is found to be -0.356 &mgr;Gal/mbar. However, this admittance factor is found to be seasonally and frequency dependent. Correlations between rainfall events and gravity changes are observed. Attempts to model these gravity changes as exponential functions of time were unsuccessful. ¿ 1998 American Geophysical Union |
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Abstract |
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Keywords
Geodesy and Gravity, Instruments and techniques, Geodesy and Gravity, Tides—Earth, Geodesy and Gravity, Ocean/Earth/atmosphere interactions, Geodesy and Gravity |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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