Physics
Scientific paper
Nov 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.2387m&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 21, p. 2387-2390
Physics
26
Ice, Mathematical Models, North America, Rheology, Very Long Base Interferometry, Crustal Fractures, Geochronology, Glaciers, Glaciology, Isostasy
Scientific paper
We predict the present-day rates of change of the lengths of 19 North American baselines due to the glacial isostatic adjustment process. Contrary to previously published research, we find that the three-dimensional motion of each of the sites defining a baseline, rather than only the radial motions of these sites, needs to be considered to obtain an accurate estimate of the rate of change of the baseline length. Predictions are generated using a suite of Earth models and late Pleistocene ice histories; these include specific combinations of the two which have been proposed in the literature as satisfying a variety of rebound related geophysical observations from the North American region. A number of these published models are shown to predict rates which differ significantly from the Very Long Base Interferometry (VLBI) observations.
Davis Joshua L.
Mitrovica Jerry X.
Shapiro Irwin I.
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