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  The far reach of ice-shelf thinning in Antarctica

Reese, R., Gudmundsson, G. H., Levermann, A., Winkelmann, R. (2018): The far reach of ice-shelf thinning in Antarctica. - Nature Climate Change, 8, 1, 53-57.
https://doi.org/10.1038/s41558-017-0020-x

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 Creators:
Reese, Ronja1, Author              
Gudmundsson, G. H.2, Author
Levermann, Anders1, Author              
Winkelmann, Ricarda1, Author              
Affiliations:
1Potsdam Institute for Climate Impact Research, ou_persistent13              
2External Organizations, ou_persistent22              

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 Abstract: Floating ice shelves, which fringe most of Antarctica’s coastline, regulate ice flow into the Southern Ocean. Their thinning or disintegration can cause upstream acceleration of grounded ice and raise global sea levels. So far the effect has not been quantified in a comprehensive and spatially explicit manner. Here, using a finite-element model, we diagnose the immediate, continent-wide flux response to different spatial patterns of ice-shelf mass loss. We show that highly localized ice-shelf thinning can reach across the entire shelf and accelerate ice flow in regions far from the initial perturbation. As an example, this ‘tele-buttressing’ enhances outflow from Bindschadler Ice Stream in response to thinning near Ross Island more than 900 km away. We further find that the integrated flux response across all grounding lines is highly dependent on the location of imposed changes: the strongest response is caused not only near ice streams and ice rises, but also by thinning, for instance, well-within the Filchner–Ronne and Ross Ice Shelves. The most critical regions in all major ice shelves are often located in regions easily accessible to the intrusion of warm ocean waters, stressing Antarctica’s vulnerability to changes in its surrounding ocean.

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 Dates: 2018
 Publication Status: Finally published
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1038/s41558-017-0020-x
PIKDOMAIN: Earth System Analysis - Research Domain I
PIKDOMAIN: Sustainable Solutions - Research Domain III
eDoc: 7848
Research topic keyword: Ice
Research topic keyword: Sea-level Rise
Model / method: Open Source Software
Regional keyword: Arctic & Antarctica
Organisational keyword: RD1 - Earth System Analysis
Organisational keyword: RD4 - Complexity Science
Working Group: Ice Dynamics
 Degree: -

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Title: Nature Climate Change
Source Genre: Journal, SCI, Scopus, p3
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Pages: - Volume / Issue: 8 (1) Sequence Number: - Start / End Page: 53 - 57 Identifier: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/140414