Transient ice sheet response of the Antarctic Ice Sheet during the Last Interglacial - Wilkes Basin collapse scenarios

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 pa...

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Bibliographic Details
Main Author: Sutter, Johannes
Format: Dataset
Language:English
Published: PANGAEA 2020
Subjects:
Antarctica
File format
File name
File size
Ice Sheet Modelling
Last Interglacial
MISI
sea level
Uniform resource locator/link to file
Antarctic
East Antarctic Ice Sheet
George V Coast
Misi
Sabrina Coast
Talos Dome
The Antarctic
Antarc*
ice core
Ice Sheet
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.918108
https://doi.org/10.1594/PANGAEA.918108
Description
Summary: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 can not 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.

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