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Evolution of Rotational Motion of the Planet Earth under the Influence of Internal Dissipative Forces

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Abstract

The influence of internal dissipation on the rotational motion of the Earth in the gravitational field of the Sun and Moon is studied within the model of M.A. Lavrentiev. The averaged equations of second approximation describing the evolution of the Earth’s rotation axis and the magnitude of its angular velocity are obtained. The dependence of the rate of evolution on the values of the model parameters is studied. Phase trajectories of the evolutionary process are constructed for different parameter values. It is shown that the observed drift of the Earth’s magnetic poles can be explained within the framework of a mechanical model by the angular acceleration of the Earth.

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ACKNOWLEDGMENTS

The author is grateful to D.A. Pritykin for discussion of the work and suggestions on its content.

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  1. Moscow Institute of Physics and Technology, 141701, Moscow, Russia

    N. I. Amelkin

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  1. N. I. Amelkin
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Correspondence to N. I. Amelkin.

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Translated by E. Seifina

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Amelkin, N.I. Evolution of Rotational Motion of the Planet Earth under the Influence of Internal Dissipative Forces. Cosmic Res 61, 510–521 (2023). https://doi.org/10.1134/S001095252370051X

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  • DOI: https://doi.org/10.1134/S001095252370051X

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