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Variations in the amplitude of the chandler wobble
Izvestiya, Physics of the Solid Earth, 2009It is shown that within the framework of the Kolmogorov model the “energy” of the pole E(t) = x 1 2 + x 2 2 can be interpreted as a Markovian process. The exact analytical expression has been obtained for the density of the conditional probability of the quantity E(t) and the problem of the first passage time of the process E(t) has been analyzed.
I. Ya. Tsurkis, E. A. Spiridonov
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Chandler Wobble and Geomagnetic Jerks
Physics of the Earth and Planetary Interiors, 2001Abstract Some features of the polar motion may be due to core–mantle coupling, but no convincing quantitative mechanism has yet been proposed. Considering phase jumps in the Chandler wobble and noticing their correlation with geomagnetic jerks [J. Geophys. Res.
Mioara Mandea +2 more
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Spectral Analyses of the Chandler Wobble
Symposium - International Astronomical Union, 1972Spectral analyses of 70 yr of ILS-IPMS data on the variation of latitude are discussed from the point of view of the confidence limits that can be placed on statistical estimates. The available data cannot be used to support the existence of two resonant frequencies in the Chandler wobble, nor are the latter required to remove an anomaly in the value ...
G. P. H. Pedersen, M. G. Rochester
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Geophysical Excitation of the Chandler Wobble Revisited
2011The 14-month Chandler wobble is a free motion of the pole excited by geophysical processes. Several recent studies demonstrated that the combination of atmospheric and oceanic excitations contains enough power at the Chandler frequency and is significantly coherent with the observed free wobble.
Brzezinski, A. +3 more
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Are earthquakes a major cause of the Chandler wobble?
Nature, 1976WHETHER or not earthquakes are a major cause of the Earth's free Eulerian nutation (period of 14 months), widely known as the Chandler wobble, has been a controversial issue. The present consensus seems to be that the crustal deformation associated with earthquakes is much too small to explain the amplitude of the Chandler wobble.
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Variations of the amplitude of the Chandler wobble
Astronomy Reports, 2002The main force and parametric actions on oscillations in the Earth-Moon system are compared. Parametric excitations due to external periodic changes in the distance between the Earth’s and Moon’s centers of mass occur in a limited number of frequency intervals. We demonstrate the role of a nonlinear parameter that limits the oscillation amplitudes, and
G. S. Kurbasova +2 more
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Oceanic excitation of the chandler wobble
Advances in Space Research, 2002We estimate the oceanic contribution to the excitation of the Chandler wobble using an 11-year time series of ocean angular momentum. The time domain comparison of this series with the non-atmospheric excitation inferred from the polar motion and atmospheric angular momentum data shows a high correlation over most of the period of 1985 to 1996 when ...
Aleksander Brzeziński, Jolanta Nastula
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Seismic Excitation of the Chandler Wobble
1970Results from the elasticity theory of dislocations as well as observational evidence are presented in support of the hypothesis of seismic excitation of the Chandler wobble. There appears to be a high degree of correlation between changes in the pole path and earthquakes with M > 7.5 in the 11 year period from 1957.0 to 1968.0.
L. Mansinha, D. E. Smylie
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Responses of the ocean to the Chandler wobble
Marine Geodesy, 1983Abstract This paper presents a feasible status report on the responses of the ocean to the Chandler wobble through analyses of sea‐level and sea‐surface temperature variations. The analysis of sea level employs a method to determine the simplest impulse response system of ocean to the Chandler wobble by a least‐squares fitting after operation of an ...
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