Accelerating ice flow at the onset of the Northeast Greenland

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Abstract

This study analyzes a 35-year record of remotely sensed velocities and a 6-year record of repeated GPS observations at the East Greenland Ice-core Project (EastGRIP) to investigate ice flow acceleration in the Northeast Greenland Ice Stream (NEGIS). The findings reveal accelerating shear margins of NEGIS, indicating ice stream widening. Modeling suggests this widening is more consistent with shear margin softening (due to fabric evolution or temperature changes) than external forcing at the surface or bed, despite recent large dynamical changes at NEGIS outlets.

Publisher

Nature Communications

Published On

Sep 23, 2022

Authors

Aslak Grinsted, Christine S. Hvidberg, David A. Lilien, Nicholas M. Rathmann, Nanna B. Karlsson, Tamara Gerber, Helle Astrid Kjær, Paul Vallelonga, Dorthe Dahl-Jensen

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