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.

中文翻译：

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最后一次间冰期威尔克斯盆地冰盖的有限退缩

南极东部冰盖对全球变暖的反应是海平面预测不确定性的主要来源。南极东部乔治五世和萨布丽娜海岸的冰盖目前正在变薄，区域冰盖不稳定事件可能是在过去的温暖气候中引发的。然而，过去冰退缩的幅度还不能仅从古代理记录中定量推导出来。我们认为，乔治五世海岸接地线的失控后退以及随后威尔克斯盆地冰盖的不稳定将在 Talos Dome 地区的水同位素组成上留下清晰的印记，或者阻止 Talos Dome 冰芯记录从最后一次间冰期。测试这个假设我们的冰盖模型模拟表明，