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Can the Core-Mantle Boundary Topography Influence the Earth's Nutation?

Published online by Cambridge University Press:  19 July 2016

V. V. Bykova
V. V. Bykova*
Affiliation:
Institute of Earth Physics Bolshaya Gruzinskaya 10, 123810 Moscow D-242, USSR

Abstract

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The nutation of the Earth with slightly nonelliptical liquid core is investigated by the perturbation theory method. It is shown that first-order terms affect the core ellipticity and its triaxiality. The most sensitive nutation terms in the second approximation were found to be retrograde 18.6-year term and retrograde annual term. The observed nutation amplitude values can be satisfied by special core-mantle boundary form.

Type
Part 3: Concepts, Definitions, Models
Information
Symposium - International Astronomical Union , Volume 141: Inertial Coordinate System on the Sky , 1990 , pp. 161 - 162
Copyright
Copyright © Kluwer 1990 

References

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