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Lateral asthenospheric viscosity variations and postglacial rebound: A case study for the Barents Sea
Author(s) -
Kaufmann Georg,
Wu Patrick
Publication year - 1998
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/98gl51505
Subject(s) - geology , viscosity , homogeneous , post glacial rebound , magnitude (astronomy) , observable , geophysics , discretization , lithosphere , sea level , seismology , tectonics , oceanography , physics , thermodynamics , quantum mechanics , astronomy , mathematical analysis , mathematics
The effect of lateral asthenospheric viscosity variations on observable signatures related to postglacial rebound in the Barents Sea is studied. Using a finite‐element approach to discretize the problem, a comparison between a laterally homogeneous reference earth model and a laterally heterogeneous earth model is performed. The results indicate that a change in asthenospheric viscosity of about three orders of magnitude influences predictions of land uplift up to 10–20 m, present‐day velocities up to 0.5–1.5 mm/a, and present‐day gravity anomalies up to 0.4–0.8 mGal in the northwestern part of the Barents Sea region.