Results 71 to 80 of about 61,254 (215)
Geophysical Excitation of the Chandler Wobble Revisited
, 2011 The 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
openaire +4 more sources
Amplitude‐Dependent Energy Dissipation Inferred From Spectral Analyses of Intraslab Earthquakes
Journal of Geophysical Research: Solid Earth, Volume 129, Issue 5, May 2024.Abstract While the Earth (rocky planet) can be approximated as an elastic body, it also possesses anelasticity, Q−1, which causes energy dissipation (intrinsic attenuation) during deformation. Rock deformation experiments have demonstrated that Q−1 shows a marked amplitude dependency for strain of >∼10−6, but seismic‐waves‐induced strain is generally ...
Hayato Tero, Junichi Nakajima
wiley +1 more source
Signatures of the Martian rotation parameters in the Doppler and range observables
, 2017 The position of a Martian lander is affected by different aspects of Mars' rotational motions: the nutations, the precession, the length-of-day variations and the polar motion.
Dehant, Veronique +2 more
core +1 more source
Effects of the oceans on polar motion: Extended investigations [PDF]
A method was found for expressing the tide current velocities in terms of the tide height (with all variables expanded in spherical harmonics). All time equations were then combined into a single, nondifferential matrix equation involving only the ...
Dickman, Steven R.
core +4 more sources
Excitation of the Earth's Chandler wobble by southern oscillation/El Nino, 1900-1979 [PDF]
The southern oscillation/El Nino (ENSO) is the single most prominent interannual signal in global atmospheric/oceanic fluctuations. The following question is addressed: how important is the angular momentum carried by ENSO in exciting the Earth's ...
Chao, B. F.
core +1 more source
, 2016 This is an exploration of dynamic tides on elastic bodies. The body is thought of as a dynamical system described by its modes of oscillation. The dynamics of these modes are governed by differential equations that depend on the rheology.
Meyer, Jennifer Ann, Wisdom, Jack
core +1 more source
the excitation of the Chandler wobble [PDF]
Geophysical Research Letters, 2000 The Chandler wobble is an excited resonance of the Earth's rotation having a period of about 14 months. Although it has been under investigation for more than a century, its excitation mechanism has remained elusive. Here, the angular momentum of the atmosphere computed from the products of a numerical weather prediction analysis system and the angular
openaire +1 more source
Effects of the oceans on polar motion: Continued investigations [PDF]
Data on the pole tide, the oceanic response to the Chandler wobble were presented. Observed North Sea pole tide enhancement (i.e., larger amplitudes than a static tide would possess) resulted from bottom friction, with the drag coefficient, in ...
Dickman, S. R.
core +1 more source
The coupling between inertial and rotational eigenmodes in planets with liquid cores
, 2019 The Earth is a rapidly rotating body. The centrifugal pull makes its shape resemble a flattened ellipsoid and Coriolis forces support waves in its fluid core, known as inertial waves.
Dehant, Veronique +3 more
core +1 more source
Period and Qw of The Chandler Wobble [PDF]
Geophysical Journal International, 1974 A splined ILS/IPMS data set (1900–1973) from the most homogeneous values available has been analysed by the maximum entropy method of Burg. Principal conclusions are: (1) the spectral character of the Chandler wobble is a single broad peak, (2) the period is 432·95 ± 1·02 mean solar days and, (3) the Qw is 36±10.
openaire +1 more source