Secular changes in rotation and gravity: Evidence of post-glacial rebound or of changes in polar ice?

Details Secular changes in rotation and gravity: Evidence of post-glacial rebound or of changes in polar ice? Secular changes in rotation and gravity: Evidence of post-glacial rebound or of changes in polar ice?

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993adspr..13..257w&link_type=abstract

Advances in Space Research, Volume 13, Issue 11, p. 257-269.

Physics

6

Scientific paper

Observed linear trends in the position of the Earth's rotation axis, in the length-of-day, and in the Earth's gravity field have often been interpreted as evidence of post-glacial rebound. These observations have been used, together with dynamical models of the rebound, to provide constraints on the Earth's viscosity profile. We use results from a numerical rebound model to discuss these constraints. We also discuss the possibility that some of the observed secular effects could be due to on-going or recent changes in ice sheet volumes. For Antarctica, we conclude that the effects could easily be as large as, or larger than, the effects of post-glacial rebound.

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