Results 31 to 40 of about 61,254 (215)
Free core nutation: new large disturbance and connection evidence with geomagnetic jerks [PDF]
, 2015 Variations in free core nutation (FCN) are connected with various processes in the Earth's fluid core and core-mantle coupling, which are also largely responsible for the geomagnetic field variations, particularly the geomagnetic jerks (GMJs). A previous
Malkin, Zinovy
core +2 more sources
Detection of Phase Jumps of Free Core Nutation of the Earth and their Concurrence with Geomagnetic Jerks [PDF]
, 2004 We detected phase jumps of the Free Core Nutation (FCN) of the Earth directly from the analysis of the Very Long Baseline Interferometer (VLBI) observation of the Earth rotation for the period 1984-2003 by applying the Weighted Wavelet Z-Transform (WWZ ...
A Toomre +20 more
core +3 more sources
The frequency dependence of Q in the Earth and implications for mantle rheology and Chandler wobble [PDF]
, 1979 For most solids the ‘high temperature background’ attenuation dominates at low frequencies and temperatures greater than about one-half the melting temperature. It is likely to be important in the mantle at seismic frequencies.
Anderson, Don L., Minster, J. Bernard
core +1 more source
Comments on the Chandler wobble Q [PDF]
Geophysical Journal International, 1979 Summary. The Chandler wobble Q, as obtained from the astronomical data cannot be equated with the Q, of the source of damping, as an examination of Chandler wobble energetics reveals. We find that if dissipation occurs in the mantle then Q, = 9 Q,, implying that either the mantle Q is frequency dependent or the wobble Q is much larger than 100.
J. B. Merriam, K. Lambeck
openaire +1 more source
A preliminary nonlinear analysis of the earth's chandler wobble
Discrete Dynamics in Nature and Society, 2000 The Chandler wobble (CW) is a resonant response of the Earth rotational pole wandering around its figure axis whose excitation mechanism is still uncertain.
V. Frede, P. Mazzega
doaj +1 more source
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
openaire +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source