The dynamical equations of polar wander and the global characteristics of the lithosphere as extracted from rotational data

Details The dynamical equations of polar wander and the global characteristics of the lithosphere as extracted from rotational data The dynamical equations of polar wander and the global characteristics of the lithosphere as extracted from rotational data

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pepi...33..226y&link_type=abstract

(European Geophysical Society, Symposium on Lateral Heterogeneity in the Lithosphere, Leeds, England, Aug. 23-28, 1982) Physics

Physics

20

Earth Rotation, Lithosphere, Polar Wandering (Geology), Earth Core, Earth Mantle, Green'S Functions, Mathematical Models, Tides

Scientific paper

In a number of studies, it has been attempted to obtain information regarding the viscosity structure of the mantle on the basis of data drawn from instantaneous polar motion and the nontidal deceleration of the spin-rate of the earth. Yuen et al. (1982) have found that the process of extracting the viscosity of the mantle from the rotational data is inherently nonlinear. The present investigation is concerned with the development of a more complete mathematical formulation than the one previously employed by Yuen et al. Attention is given to the rotational dynamics of a layered viscoelastic earth, the characteristics of the Green's functions for surface forcing and tidal loading processes, and geophysical results. The most important result presented is related to the complete mathematical formulation of the rotational problem involving both polar wander and changes in the axial spin rate.

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