Limited Retreat of the Wilkes Basin Ice Sheet During the Last Interglacial

Sutter, J.; Eisen, O.; Werner, M.; Grosfeld, K.; Kleiner, T.; Fischer, H. (2020). Limited Retreat of the Wilkes Basin Ice Sheet During the Last Interglacial. Geophysical Research Letters, 47(13) American Geophysical Union 10.1029/2020GL088131

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The response of the East Antarctic Ice Sheet to global warming represents a major source of uncertainty in sea‐level projections. Thinning of the East Antarctic George V and Sabrina Coast ice cover is currently taking place, and regional ice‐sheet instability episodes might have been triggered in past warm climates. However, the magnitude of ice retreat in the past cannot yet be quantitatively derived from paleo‐proxy records alone. We propose that a runaway retreat of the George V coast grounding line and subsequent instability of the Wilkes Basin ice sheet would either leave a clear imprint on the water isotope composition in the Talos Dome region or prohibit a Talos Dome ice‐core record from the Last Interglacial altogether. Testing this hypothesis, our ice‐sheet model simulations suggest that Wilkes Basin ice‐sheet retreat remained relatively limited during the Last Interglacial and provide a constraint on Last Interglacial East Antarctic grounding line stability.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Climate and Environmental Physics
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)
08 Faculty of Science > Physics Institute

UniBE Contributor:

Sutter, Johannes Carl Roderick and Fischer, Hubertus

Subjects:

500 Science > 530 Physics

ISSN:

0094-8276

Publisher:

American Geophysical Union

Funders:

[UNSPECIFIED] EU HORIZON 2020
[42] Schweizerischer Nationalfonds

Projects:

[UNSPECIFIED] 730258
[UNSPECIFIED] 820970 ‐ TiPES

Language:

English

Submitter:

Hubertus Fischer

Date Deposited:

16 Jul 2020 14:45

Last Modified:

28 Jul 2020 20:59

Publisher DOI:

10.1029/2020GL088131

BORIS DOI:

10.7892/boris.145233

URI:

https://boris.unibe.ch/id/eprint/145233

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