Mathematics – Logic
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993geoji.114..399s&link_type=abstract
Geophysical Journal International, Vol. 114, No. 2, p. 399 - 404
Mathematics
Logic
1
Scientific paper
The rotational behaviour of a stratified viscoelastic planet is analysed by means of a quasi-analytical method. The authors' approach is particularly appropriate to study the long-term polar wander induced by internal loads, and in particular to study the effects due to time-dependent mantle convection. The authors focus on a simple explicit solution of the Liouville non-linear equations, in order to establish the relationships between internal rheological constitution of the planet and polar motion. Both the rate and the direction of polar wander are found to be extremely sensitive to the mantle stratification and in particular to the nature of the 670 km depth seismic discontinuity.
Ricard Yanick
Sabadini Roberto
Spada Giorgio
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