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A Review of the Different Liquid Core Models Used for the Computation of the Dynamical Effects on Nutations and Earth Tides

Published online by Cambridge University Press:  14 August 2015

P. Melchior
P. Melchior*
Affiliation:
Royal Observatory of Belgium, Bruxelles, Belgium

Extract

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Note: This short review was given during the Symposium at the request of a number of participants to serve as an elementary introduction to the discussion of the results obtained from different Earth models. It was not prepared in advance and is not an original contribution.

The first approximation of the figure of a fluid planet is obtained by assuming hydrostatic equilibrium with respect to its gravitational self-attraction and the centrifugal force. When the speed of rotation is not too fast, the equipotential surfaces may be considered to an excellent approximation as ellipsoids of revolution. It is easy to show that these hydrostatic equipotential surfaces are surfaces of equal density (p).

Type
Session IV
Information
Symposium - International Astronomical Union , Volume 78: Nutation and the Earth's Rotation , 1980 , pp. 161 - 163
Copyright
Copyright © Reidel 1980 

References

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