Comparison between the theoretical and observed tidal gravimetric factors

Details Comparison between the theoretical and observed tidal gravimetric factors Comparison between the theoretical and observed tidal gravimetric factors

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pepi...49..192d&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 49, Issue 3-4, p. 192-212.

Physics

28

Scientific paper

At present there is a discrepancy of ~ 1.5% between the Wahr's gravimetric factor and the observed one. The aim of this paper is to explain a part of this discrepancy. To compare correctly the theory and the observations, it is necessary to adopt a different definition of the tidal gravimetric factor δ. A new theoretical value is then computed at each tidal frequency, for an elliptical uniformly rotating Earth model.
From the ICET data bank, we deduce an experimental model for five tidal waves by regression between all the observations currently available and the function of the latitude which enter in the theoretical form of δ. The latitude dependent part fits the theory and the discrepancy on the constant part is reduced by a factor of two. The remaining gap is 0.5% for O1, 0.4% for P1, 0.8% for K1 and 0.8% for M2.

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