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Title:
Pleistocene deglaciation and the earth's rotation - A new analysis
Authors:
Wu, P.; Peltier, W. R.
Affiliation:
AA(Toronto, University, Toronto, Canada), AB(Toronto, University, Toronto, Canada)
Publication:
Geophysical Journal (ISSN 0016-8009), vol. 76, March 1984, p. 753-791.
Publication Date:
03/1984
Category:
Geophysics
Origin:
STI
NASA/STI Keywords:
Earth Rotation, Geochronology, Glaciology, Melting, Angular Velocity, Earth Mantle, Earth Surface, Loads (Forces), Magnetic Poles, Mass Distribution, Surface Properties
DOI:
10.1111/j.1365-246X.1984.tb01920.x
Bibliographic Code:
1984GeoJ...76..753W

Abstract

A new analysis of the influence of the Pleistocene glacial cycle upon the earth's rotation is presented. The general theoretical background to the problem of deglaciation-forced rotational effects if first presented, and a detailed analysis of deglaciation-forced polar wander is provided for homogeneous and for realistic stratified viscoelastic models of the earth. The possibility that there might be another geophysical observable which is intimately related to the acceleration of rotation by ice sheet ablation and accumulation and which could be employed as a further check upon the mantle viscosity inferred from this datum is pointed out. Since the parameter J(2) may be very accurately measured by observing the precession rates of the orbital planes of artificial earth satellites, its time derivative may be estimated from the J(2) time series. This measurement is shown to be feasible using satellite laser ranging.
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