Premium
A new test of Earth tide models in central Europe
Author(s) -
Baker T. F.,
Curtis D. J.,
Dodson A. H.
Publication year - 1996
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/96gl03335
Subject(s) - gravimeter , ocean tide , geology , geodesy , calibration , gravimetry , gravimetric analysis , earth model , geophysics , tidal model , dissipation , tide gauge , sea level , oceanography , physics , geotechnical engineering , casing , chemistry , organic chemistry , quantum mechanics , thermodynamics , reservoir modeling
New improved ocean tide models allow a corresponding improvement in ocean tide loading computations. During recent years various groups have made more accurate tidal gravity observations in central Europe, using gravimeters carefully calibrated on various calibration lines. This progress with tidal gravity measurements and ocean loading corrections now allows a more comprehensive test of body tide models than was possible previously. It is shown that the O 1 and M 2 gravimetric factors, corrected using the latest ocean tide models, are very consistent between the sites, despite the different instruments and gravity calibration lines that have been used. These observations allow constraints to be put on the anelasticity of the Earth at tidal frequencies. The corrected gravimetric factors are consistent with recent model results for both the elastic PREM model and with α ≤ 0.09 for an anelastic PREM model with the Q for dissipation in shear varying as frequency to the power α.