[en] 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 i s
found to be -0.356 mGal/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.
Disciplines :
Physique Sciences de la terre & géographie physique
Identifiants :
UNILU:UL-ARTICLE-2008-836
Auteur, co-auteur :
VAN DAM, Tonie ; NOAA/NGS and CIRES, University of Colorado, Boulder
