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  Stabilizing the West Antarctic Ice Sheet by surface mass deposition

Feldmann, J., Levermann, A., Mengel, M. (2019): Stabilizing the West Antarctic Ice Sheet by surface mass deposition. - Science Advances, 5, 7, eaaw4132.
https://doi.org/10.1126/sciadv.aaw4132

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 Creators:
Feldmann, Johannes1, Author              
Levermann, Anders1, Author              
Mengel, Matthias1, Author              
Affiliations:
1Potsdam Institute for Climate Impact Research, ou_persistent13              

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Free keywords: SPP 1158
 Abstract: There is evidence that a self-sustaining ice discharge from the West Antarctic Ice Sheet (WAIS) has started, potentially leading to its disintegration. The associated sea level rise of more than 3m would pose a serious challenge to highly populated areas including metropolises such as Calcutta, Shanghai, New York City, and Tokyo. Here, we show that the WAIS may be stabilized through mass deposition in coastal regions around Pine Island and Thwaites glaciers. In our numerical simulations, a minimum of 7400 Gt of additional snowfall stabilizes the flow if applied over a short period of 10 years onto the region (−2 mm year−1 sea level equivalent). Mass deposition at a lower rate increases the intervention time and the required total amount of snow. We find that the precise conditions of such an operation are crucial, and potential benefits need to be weighed against environmental hazards, future risks, and enormous technical challenges.

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 Dates: 2019
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1126/sciadv.aaw4132
PIKDOMAIN: RD1 - Earth System Analysis
PIKDOMAIN: RD4 - Complexity Science
PIKDOMAIN: RD3 - Transformation Pathways
eDoc: 8518
Research topic keyword: Ice
Research topic keyword: Sea-level Rise
Research topic keyword: Tipping Elements
Model / method: PISM-PIK
Regional keyword: Arctic & Antarctica
Organisational keyword: RD1 - Earth System Analysis
Organisational keyword: RD4 - Complexity Science
Working Group: Ice Dynamics
Working Group: Ice Dynamics
Working Group: Data-Centric Modeling of Cross-Sectoral Impacts
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Title: Science Advances
Source Genre: Journal, SCI, Scopus, p3, oa
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Pages: - Volume / Issue: 5 (7) Sequence Number: eaaw4132 Start / End Page: - Identifier: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/161027