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

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 systemati...

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Bibliographic Details
Published inAnnals of glaciology Vol. 60; no. 78; pp. 32 - 41
Main Authors Still, Holly, Campbell, Adam, Hulbe, Christina
Format Journal Article
LanguageEnglish
Published Cambridge, UK Cambridge University Press 01.04.2019
Subjects
Antarctic glaciology
Budgets
Earth science
Floating ice
Glaciers
Ice
Ice cover
ice rise
Ice sheets
Ice shelves
Land ice
Mechanical analysis
Mechanics
Morphology
Ocean floor
Pinning
Sea level
Topography
New Zealand
Antarctica
Roosevelt Island
ice rise
Antarctic glaciology
ice shelves
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Summary: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.
ISSN:0260-3055
1727-5644
DOI:10.1017/aog.2018.31