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Future sea level change from Antarctica's Lambert-Amery glacial system

Pittard, M.L.; Galton-Fenzi, B.K.; Watson, C.S.; Roberts, J.L.

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Authors

M.L. Pittard

B.K. Galton-Fenzi

C.S. Watson

J.L. Roberts



Abstract

Future global mean sea level (GMSL) change is dependent on the complex response of the Antarctic ice sheet to ongoing changes and feedbacks in the climate system. The Lambert-Amery glacial system has been observed to be stable over the recent period yet is potentially at risk of rapid grounding line retreat and ice discharge given that a significant volume of its ice is grounded below sea level, making its future contribution to GMSL uncertain. Using a regional ice sheet model of the Lambert-Amery system, we find that under a range of future warming and extreme scenarios, the simulated grounding line remains stable and does not trigger rapid mass loss from grounding line retreat. This allows for increased future accumulation to exceed the mass loss from ice dynamical changes. We suggest that the Lambert-Amery glacial system will remain stable or gain ice mass and mitigate a portion of potential future sea level rise over the next 500 years, with a range of +3.6 to −117.5 mm GMSL equivalent.

Citation

Pittard, M., Galton-Fenzi, B., Watson, C., & Roberts, J. (2017). Future sea level change from Antarctica's Lambert-Amery glacial system. Geophysical Research Letters, 44(14), 7347-7355. https://doi.org/10.1002/2017gl073486

Journal Article Type Article
Acceptance Date Jun 13, 2017
Online Publication Date Jul 29, 2017
Publication Date Jul 29, 2017
Deposit Date Oct 6, 2017
Publicly Available Date Jan 28, 2018
Journal Geophysical Research Letters
Print ISSN 0094-8276
Electronic ISSN 1944-8007
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 44
Issue 14
Pages 7347-7355
DOI https://doi.org/10.1002/2017gl073486

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Copyright Statement
Pittard, M.L., Galton-Fenzi, B.K., Watson, C.S. & Roberts, J.L. (2017). Future sea level change from Antarctica's Lambert-Amery glacial system. Geophysical Research Letters 44(14): 7347-7355, 10.1002/2017gl073486 (DOI). To view the published open abstract, go to https://doi.org/ and enter the DOI.




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