Lateral asthenospheric viscosity variations and postglacial rebound: A case study for the Barents Sea

Abstract

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.