Articles | Volume 16, issue 5
The Cryosphere, 16, 1927–1940, 2022
The Cryosphere, 16, 1927–1940, 2022
Research article
20 May 2022
Research article | 20 May 2022

Shear-margin melting causes stronger transient ice discharge than ice-stream melting in idealized simulations

Johannes Feldmann et al.

Model code and software

PISM model code for shear-margin vs. ice-stream melt Johannes Feldmann

Short summary
We use a numerical model to simulate the flow of a simplified, buttressed Antarctic-type outlet glacier with an attached ice shelf. We find that after a few years of perturbation such a glacier responds much stronger to melting under the ice-shelf shear margins than to melting in the central fast streaming part of the ice shelf. This study explains the underlying physical mechanism which might gain importance in the future if melt rates under the Antarctic ice shelves continue to increase.