Mechanical analysis of pinning points in the Ross Ice Shelf, Antarctica

ABSTRACT Ice shelves regulate the rate of ice-sheet discharge along much of the Antarctic coastline. Pinning points, sites of localised grounding within floating ice, can in turn, regulate the flow and thickness of an ice shelf. While the net resistive effect of ice shelves has been quantified in a...

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Bibliographic Details
Published in:Annals of Glaciology
Main Authors: Still, Holly, Campbell, Adam, Hulbe, Christina
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 2018
Subjects:
Antarctic
The Antarctic
West Antarctica
Ross Ice Shelf
Annals of Glaciology
Antarc*
Antarctica
Ice Sheet
Ice Shelf
Ice Shelves
Online Access:http://dx.doi.org/10.1017/aog.2018.31
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305518000319
Description
Summary:ABSTRACT Ice shelves regulate the rate of ice-sheet discharge along much of the Antarctic coastline. Pinning points, sites of localised grounding within floating ice, can in turn, regulate the flow and thickness of an ice shelf. While the net resistive effect of ice shelves has been quantified in a systematic way, few extant pinning points have been examined in detail. Here, complete force budgets are calculated and examined for ice rises and rumples in the Ross Ice Shelf, West Antarctica. The diverse features have different effects on ice shelf mechanics that do not depend simply on their size but may, we conclude, depend on the properties of seafloor materials.

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