Results 21 to 30 of about 201 (152)
Self-consistent models of Earth's mantle and core from long-period seismic and tidal constraints
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.Abstract Here we illustrate the use of parameterized models to address fundamental questions about Earth's mantle and core structure. For this, we invert a large set of normal‐mode center frequencies and quality (attenuation) factors, along with astronomic‐geodetic data, for the radial anelastic seismic structure of the Earth.
Munch FD +4 more
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Wavelet analysis of the Chandler wobble [PDF]
Journal of Geophysical Research: Solid Earth, 1998 Wavelet analysis is applied to analyze polar motion spanning the years 1890–1997. First, the wavelet transform is used to identify the components (prograde and retrograde) present in the data. This wavelet transform is subsequently used to filter and reconstruct each component.
Dominique Gibert +2 more
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Dissipation and Ellipticity of the Chandler Wobble [PDF]
International Astronomical Union Colloquium, 2000 AbstractThe Chandler wobble, one of the main feature of the Earth’s polar motion, is related to the properties of the mantle and liquid core as well as the mobility of the oceans. The equilibrium pole tide and mantle anelasticity both lengthen the Chandler period, moreover, the former imposes a slight ellipticity on the pole path, and the latter is ...
Yaozhong Zhu, Buxi Gao
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Journal of Astronomy and Space SciencesTwo main components of polar motion are Chandler wobble and annual wobble. Annual wobble is obviously caused by the seasonal perturbations on the Earth – such was suspected as well as readily confirmed in unison.
Sung-Ho Na, Yu Yi
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SYNCHRONIZATION OF TERRESTRIAL PROCESSES WITH FREQUENCIES OF THE EARTH-MOON-SUN SYSTEM
Odessa Astronomical Publications, 2016 It is established that the frequencies of the quasi-biennial oscillation (QBO) of atmospheric winds and the Chandler wobble (CW) of the Earth's poles are synchronized with each other and with the fundamental frequencies of the Earth–Moon–Sun system.
N. S. Sidorenkov
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Excitation of the Chandler Wobble [PDF]
International Astronomical Union Colloquium, 2000 AbstractThe redistribution of air and water masses between the Pacific and Indian oceans during the El Niño/Southern oscillation (ENSO) changes the components of the Earth’s inertia tensor and shifts the position of the pole of the Earth’s rotation. The spectrum of the ENSO has components with periods of about 6, 3.6, 2.8, and 2.4 years.
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Geodynamic Research at the Department of Planetary Geodesy, SRC PAS
Reports on Geodesy and Geoinformatics, 2016 The Department of Planetary Geodesy of the Space Research Centre PAS has been conducting research on a broad spectrum of problems within a field of global dynamics of the Earth.
Brzeziński Aleksander +11 more
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The Rheology of the Earth in the Intermediate Time Range
Annals of Geophysics, 1970 The evidence bearing upon the rheology of the " tectonically<br />significant layers" of the Earth (" tectonosphere ") in the intermediate<br />time range (4 hours to 15000 years) is analyzed.
A. E. SCHEIDEGGER
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The Earth’s variable Chandler wobble [PDF]
Astronomy & Astrophysics, 2011 Aims. We investigated the causes of the Earth’s Chandler wobble variability over the past 60 years. Our approach is based on integrating of the atmospheric and oceanic angular momentum computed by global circulation models. We directly compared the result of the integration with the Earth’s pole coordinate observed by precise astrometric, space, and ...
Bizouard, C. +4 more
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The Period of the Chandler Wobble [PDF]
Symposium - International Astronomical Union, 1980 Realistic models of the Earth are known to possess a solid anelastic inner core, mantle and crust, and a fluid core and oceans. How might we go about calculating the theoretical free period of the Chandler wobble of such an Earth model? Let xi be a set of Cartesian axes with an origin at the center of mass, and let ωi be the instantaneous angular ...
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