Abstract
The problem of interactions between earth tides and oceanic tides is rather complex as it involves effects of newtonian attraction, loading and associated change of earth potential, tangential pressure and friction on the moving ocean floor which are not always easy to evaluate, principally for coastal or island stations.
This paper takes advantage of two facts:
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(1)
By the end of 1983 the International Center of Earth Tides has collected and evaluated a considerable amount of data from 223 stations including those of the Trans World Profiles developed by the same group of authors (102 stations). This ensures, for the first time, a World wide distribution including the tropical areas and the southern hemisphere.
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[2)
In 1978 – 80, new oceanic cotidal maps of high quality, established by E.W. Schwiderski, became available.
We have calculated, for the eight principal tidal waves, the correlations between the observed gravity variations and those resulting from a calculation based upon the Schwiderski maps. This correlation is highly significant.
At the level of accuracy of the best transportable gravimeters the agreement is perfect except at a few places where effects of lateral heterogeneities in the mantle can perhaps be suspected.
These cotidal maps can therefore be safely used as working standards for other geodetic and geophysical applications.
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Melchior, P., Ducarme, B., Van Ruymbeke, M., Poitevin, C., De Becker, M. (1984). Interactions between Oceanic and Gravity Tides, as Analysed from World-Wide Earth Tide Observations and Ocean Models. In: Seeber, G., Apel, J.R. (eds) Geodetic Features of the Ocean Surface and their Implications. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-1673-4_7
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DOI: https://doi.org/10.1007/978-94-017-1673-4_7
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