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Discussion papers
https://doi.org/10.5194/tc-2019-32
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-2019-32
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Brief communication 15 Mar 2019

Brief communication | 15 Mar 2019

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This discussion paper is a preprint. It is a manuscript under review for the journal The Cryosphere (TC).

Brief communication: A submarine wall protecting the Amundsen Sea intensifies melting of neighboring ice shelves

Özgür Gürses1, Vanessa Kolatschek1, Qiang Wang1, and Christian B. Rodehacke1,2 Özgür Gürses et al.
  • 1Alfred-Wegener-Institut Helmholtz-Zentrum für Polar-und Meeresforschung, Bremerhaven, 27570, Germany
  • 2Danish Meteorological Institute, Copenhagen Ø, 2100, Denmark

Abstract. Disintegration of ice shelves in the Amundsen Sea has the potential to cause sea level rise by inducing an acceleration of grounded ice streams. Moore et al. (2018) proposed that using a submarine wall to block the penetration of warm water into the ice shelf cavities could reduce this risk. We use a global sea ice-ocean model to show that a wall shielding the Amundsen Sea below 350 m depth successfully suppresses the inflow of warm water and reduces ice shelf melting. However, the warm water gets redirected towards neighboring ice shelves, which reduces the effectiveness of the wall.

Özgür Gürses et al.
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Short summary
The warming of the Earth's climate system causes sea level rise. In Antarctica, ice streams flow into the sea and develop ice shelves. These are floating extensions of the ice streams. Ocean water melts these ice shelves. It has been proposed that a submarine wall shall shield these ice shelves from the warm water. Our model simulation show, that the wall protects ice shelves. However the warm water flows to neighboring ice shelves. There enhanced melting reduces the effectiveness of the wall.
The warming of the Earth's climate system causes sea level rise. In Antarctica, ice streams flow...
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