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Journal of Inverse and Ill-posed Problems

Editor-in-Chief: Kabanikhin, Sergey I.


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1569-3945
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Volume 24, Issue 1

Issues

Reconstruction of prograde and retrograde Chandler excitation

Leonid V. Zotov
  • Sternberg Astronomical Institute of Moscow State University, Universitetsky pr. 13, 119991 Moscow, Russia; and National Research University Higher School of Economics, Myasnitskaya 20, Moscow, Russia
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/ Christian Bizouard
  • Paris Observatory, Service de la Rotation de la Terre 61, Avenue de l'Observatoire, 75014 Paris, France
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Published Online: 2015-05-21 | DOI: https://doi.org/10.1515/jiip-2013-0085

Abstract

Observed polar motion consists of uniform circular motions at both positive (prograde) and negative (retrograde) frequencies. Generalized Euler–Liouville equations of Bizouard, taking into account Earth's triaxiality and asymmetry of the ocean tide, show that the corresponding retrograde and prograde circular excitations are coupled at any frequency. In this work, we reconstructed the polar motion excitation in the Chandler band (prograde and retrograde). Then we compared it with geophysical excitation, filtered out in the same way from the series of the Oceanic Angular Momentum (OAM) and Atmospheric Angular Momentum (AAM) for the period 1960–2000. The agreement was found to be better in the prograde band than in the retrograde one.

Keywords: Earth rotation; Chandler wobble; Panteleev filtering; Atmospheric Angular Momentum (AAM); Oceanic Angular Momentum (OAM)

MSC: 70F17; 45Q05; 86A30

About the article

Received: 2013-12-15

Revised: 2014-07-25

Accepted: 2015-04-05

Published Online: 2015-05-21

Published in Print: 2016-02-01


Funding Source: RFBI

Award identifier / Grant number: 12-02-31184


Citation Information: Journal of Inverse and Ill-posed Problems, Volume 24, Issue 1, Pages 99–105, ISSN (Online) 1569-3945, ISSN (Print) 0928-0219, DOI: https://doi.org/10.1515/jiip-2013-0085.

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