Abstract 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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    Title :

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


    Contributors:

    Published in:

    Advances in Space Research ; 13 , 11 ; 257-269


    Publication date :

    1993-01-01


    Size :

    13 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English