The excitation of the Chandler wobble

Runcorn, S. K.; Wilkins, G. A.; Groten, E.; Lenhardt, H.; Campbell, James; Hide, R.; Chao, B. F.; Souriau, Annie; Hinderer, J.; Legros, H.; Mouël, Jean‐Louis Le; Feissel, M.

doi:10.1007/bf01901631

Cited by 16 publications

(5 citation statements)

References 29 publications

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“…Note that, given uncertainties, the Jose cycle could actually be the Suess-de Vries ~200 yr cycle (Stefani et al 2020). (Hinderer et al, 1987;Runcorn et al, 1988;Gibert et al, 1998;Bellanger et al, 2001;Bellanger et al, 2002;Gibert and Le Mouël, 2008). The "Laplace" -11/3/21 -2 nd Revision 15/45 Component m1 is in red and m2 in blue.…”

Section: Second Ssa Component (Annual)mentioning

confidence: 99%

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On the shoulders of Laplace

Lopes

Mouël

Courtillot

et al. 2021

Physics of the Earth and Planetary Interiors

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Section: Second Ssa Component (Annual)mentioning

confidence: 99%

“…The modulations are very large, similar for m1 and m2, and undergo a sharp and simultaneous change in phase and amplitude in 1930. Many scientists have studied this phase change(Hinderer et al, 1987;Runcorn et al, 1988;…”

mentioning

confidence: 99%

On the shoulders of Laplace

Lopes

Mouël

Courtillot

et al. 2021

Physics of the Earth and Planetary Interiors

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“…This paper presents the results of the system approach to considering the problems of observation performance, methods for processing and interpreting the observation results, and the existing gravity dependence of astronomic instruments. The source of the dead-end situation [10] occurred in trying to reveal the physical nature of the zenith distance variation (latitude variability) was found out. Some mistakes in processing the observation data 6 became a source of wrong interpretation of the observed regular variations in the zenith distance.…”

Section: Discussionmentioning

confidence: 99%

The Chandler wobble and Solar day

Kiryan¹,

Kiryan²

2012

Preprint

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This work supplements the main results given in our paper "The Chandler wobble is a phantom" [7] and refines the reasons for which researchers previously failed in interpreting the physical meaning of observed zenith distance variations. The main reason for the Chandler wobble challenge emergence was that, in analyzing time series with the step multiple of solar day, researchers ignored the nature of the solar day itself. In addition, astrometric instruments used to measure the zenith distance relative the local normal are, by definition, gravity independent, since the local normal is tangential to the gravitation field line at the observation point. Therefore, the detected zenith distances involve all the instantaneous gravitational field distortions. The direct dependence of the zenith distance observations on the gravitational effect of the Moon's perigee mass brings us to the conclusion that the Chandler wobble is fully independent of the possible motion of the Earth's rotation axis within the Earth.

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“…On the other hand, in addition to seasonal com ponents, the spectrum of PM is sharply peaked at the Chandler frequency, a feature which has historically been interpretted to mean (e.g. Runcorn et al, 1990) that PM near the Chandler fre quency requires special explanation. In fact, the excellent sig nal to noise level provided by modern data permits PM be ana lyzed over a continuum of periods extending from hours to decades.…”

Section: Pm and Lod At Periods Less Than A Few Yearsmentioning

confidence: 99%

Earth rotation and global change

Wilson¹

1995

Reviews of Geophysics

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Variations in the rotation of the Earth include changes in the rate of rotation (altering the Length of the Day, LOD), in orientation of the rotation axis relative to a terrestrial frame (Polar Motion, PM) and in orientation relative to a celestial frame due to external torques (Nutation and Precession). Variations occur over a wide range of time scales, from hours to the age of the Earth. Scientific interest in and understanding of Earth rotation variations have proceeded rapidly over the last several decades due, in large part, to enormous improvements in observations by space geodetic means, including satellite laser ranging (SLR), very long baseline interferometry (VLBI), lunar laser ranging (LLR), and satellite positioning methods, especially the global positioning system (GPS). The study of the Earth's rotation is a mature interdisciplinary field, and extensive reviews of many aspects of the field are contained in the AGU monographs ‘Contributions of Space Geodesy to Geodynamics’ (Smith and Turcotte, 1993). Articles by Eubanks (1993), Dickey (1993), Hide and Dickey (1991), and monographs by Lambeck (1988,1980) and Munk and Mac Donald (1960) provide excellent background material on these problems, as well. The reader may also wish to review other IUGG Report articles in this series on related subjects, specifically those on the global gravity field, VLBI technology, satellite orbit dynamics, and GPS.

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The excitation of the Chandler wobble

Cited by 16 publications

References 29 publications

On the shoulders of Laplace

On the shoulders of Laplace

The Chandler wobble and Solar day

Earth rotation and global change

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