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On the Nature of the Nonhydrostatic Quadrupole Excess Moment of the Earth

Published online by Cambridge University Press:  14 August 2015

T. V. Ruzmaikina
T. V. Ruzmaikina*
Affiliation:
Institute of the Physics of the Earth, U.S.S.R. Academy of Sciences

Extract

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I wish to discuss an effect that is caused by the secular decrease in the Earth's rotation. I shall show that this deceleration induces mass flows across level surfaces and that these flows redistribute temperature and density in the Earth and produce an excess equatorial bulge. This mechanism does not require large lower mantle viscosity, unlike mechanisms discussed by Munk and MacDonald (1960) and McKenzie (1966). Therefore it does not suffer from the difficulties pointed out by Goldreich and Toomre (1969).

Type
Session III
Information
Symposium - International Astronomical Union , Volume 78: Nutation and the Earth's Rotation , 1980 , pp. 153 - 156
Copyright
Copyright © Reidel 1980 

References

Goldreich, P. and Toomre, A.: 1969, J. Geophys. Res. 74, 2555–2567.Google Scholar
Magnitsky, V. A.: 1971, J. Geophys. Res. 76, 1391–1396.Google Scholar
McKenzie, D. P.: 1966, J. Geophys. Res. 71, 3995–4010.Google Scholar
Munk, W. H. and MacDonald, G. J. F.: 1960, The Rotation of the Earth (Cambridge Univ. Press, New York).Google Scholar