Articles | Volume 15, issue 6
The Cryosphere, 15, 2647–2665, 2021
https://doi.org/10.5194/tc-15-2647-2021
The Cryosphere, 15, 2647–2665, 2021
https://doi.org/10.5194/tc-15-2647-2021

Research article 14 Jun 2021

Research article | 14 Jun 2021

Mechanics and dynamics of pinning points on the Shirase Coast, West Antarctica

Holly Still and Christina Hulbe

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Short summary
Pinning points, locations where floating ice shelves run aground, modify ice flow and thickness. We use a model to quantify the Ross Ice Shelf and tributary ice stream response to a group of pinning points. Ice stream sensitivity to pinning points is conditioned by basal drag, and thus basal properties, upstream of the grounding line. Without the pinning points, a redistribution of resistive stresses supports faster flow and increased mass flux but with a negligible change in total ice volume.