Physics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....3147p&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #3147
Physics
Scientific paper
Previous investigations of the influence of rotational feedback upon post glacial relative sea level histories, by several groups, including my own, have been interpreted to imply that this influence upon Holocene records was slight.Recently published analyses, however, have suggested that there are certain locations where the influence is sufficiently strong to be clearly observable( Peltier, W.R., 2002, J. Quat. Science, 17, 491-510), in particular in Argentinian Patagonia. New data from this region were recently published by my colleagues and I ( Rostami et al, 2000, Quat. Sci. Rev., 19, 1495-1525)which clearly demonstrate that the mid-Holocene high stand along this portion of the coast of South America has the greatest amplitude of this feature of far field postglacial RSL records of any region not influenced by tectonics. Furthermore, and as demonstrated in Rostami et al., this feature is found at higher elevation above present day sea level the further south along the coast one goes from the equator. Analyses to be discussed in this paper will include a demonstration that the influence of rotational feedback not only explains the great amplitude of the highstand at southernmost sites in Argentinian Patagonia but also the previously published gradient in high stand elevation with respect to latitude. Since the time dependence of geoid height with respect to the centre of mass of the planet that will be measured by GRACE is strongly influenced by rotational feedback ( eg. see Douglas B.D and Peltier, W.R.,2002, Physics Today, March edition) it is clearly important that our models of the influence of glacial isostatic adjustment include an accurate accounting of this influence.
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