Physics – Geophysics
Scientific paper
Apr 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pepi...25...71m&link_type=abstract
Physics of the Earth and Planetary Interiors, vol. 25, Apr. 9, 1981, p. 71-106.
Physics
Geophysics
8
Earth Tides, Geophysics, Gravimetry, Oceans, Tidal Waves, Africa, Altimeters, Asia, Australia, Calibrating, Earth Crust, Earth Mantle, Error Analysis, Europe, Harmonic Analysis, Indian Ocean, Indonesia, Love Waves, Pacific Ocean
Scientific paper
Precision measurements of earth tides along a profile stretching from Europe to Polynesia through East Africa, Asia and Australia are used to characterize ocean tides in different basins and thus provide a check on proposed cotidal maps. Ocean tide information was extracted from tidal gravity profiles made with correctly intercalibrated gravimeters at 91 tidal gravity stations by the subtraction of electric earth tide model vectors from the observed tidal vector. Analysis of possible instrumental errors due to calibration, thermal, barometric and power supply interruption effects indicates the data observed at a level of 0.5 microgal cannot be ascribed to computational or instrumental errors. Calculations of the ocean load and attraction signal obtained from the earth tide measurements are observed to be in very good agreement with those obtained from the cotidal maps of Schwiderski (1979, 1980) for satellite altimetry reductions for the diurnal components of the tides, however, less satisfactory agreement is observed in some large areas for the semi-diurnal components. The maps of Hendershott (1973) and Parke (1979) are also found to provide good results in several large areas, but not everywhere. Regions where a more detailed investigation is required are indicated, including Iran-Pakistan, Malaysia, the South China Sea and the South Pacific.
Ducarme Bernard
Melchior Peter
Moens Marc
van Ruymbeke Michel
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