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Model of Oscillations of Earth’s Poles Based on Gravitational Tides

  • S. A. Kumakshev
Conference paper
Part of the Springer Geology book series (SPRINGERGEOL)

Abstract

A model of oscillations of Earth’s poles is constructed on the basis of the analysis of the gravitational torques from Sun and Moon. The model reflects physical processes and does not imply using curve fitting techniques, based, for example, on the polynomial approximation. Within the framework of this model, the Chandler frequency is interpreted as the fundamental frequency of oscillations of the mechanical system and the annual frequency as the frequency of the excitation force. A fine mechanism of excitation of the oscillations based on the combination of natural and forced frequencies is revealed. The model has only six parameters that can be identified by applying the least squares technique to the experimental data of the International Earth Rotation and Reference Systems Service. The prediction provided by the proposed model has high degree of accuracy for an interval of several years.

Keywords

Earth’s pole oscillations Gravitational torques 

Notes

Acknowledgement

This study was partly supported by the Russian Foundation for Basic Research (project 17-01-00538).

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institute for Problems in Mechanics of the Russian Academy of SciencesMoscowRussia

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