Tidal variations of earth rotation

Details Tidal variations of earth rotation Tidal variations of earth rotation

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86..881y&link_type=abstract

Journal of Geophysical Research, vol. 86, Feb. 10, 1981, p. 881-891.

Physics

162

Earth Rotation, Earth Tides, Geophysical Fluids, Periodic Variations, Tides, Diurnal Variations, Earth Core, Earth Mantle

Scientific paper

The periodic variations of the earths' rotation resulting from the tidal deformation of the earth by the sun and moon were rederived including terms with amplitudes of 0.002 millisec and greater. The series applies to the mantle, crust, and oceans which rotate together for characteristic tidal periods; the scaling parameter is the ratio of the fraction of the Love number producing tidal variations in the moment of inertia of the coupled mantle and oceans (k) to the dimensionless polar moment of inertia of the coupled moments (C). The lunar laser ranging data shows that k/C at monthly and fortnightly frequencies equals 0.99 + or - 0.15 and 0.99 + or - 0.20 as compared to the theoretical value of 0.94 + or - 0.04.

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