Stability of the Antarctic Ice Sheet during the pre-industrial Holocene
Stability of the Antarctic Ice Sheet during the pre-industrial Holocene
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DOI：
10.1038/s43017-022-00309-5
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发表时间：
2022-07
影响因子：
42.1
通讯作者：
Richard S. Jones;Joanne S. Johnson;Yucheng Lin;A. Mackintosh;J. Sefton;James A. Smith;E. Thomas;P. Whitehouse
中科院分区：
文献类型：
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作者：
Richard S. Jones;Joanne S. Johnson;Yucheng Lin;A. Mackintosh;J. Sefton;James A. Smith;E. Thomas;P. Whitehouse
南极冰盖（AIS）对2100年以后全球海平面上升的贡献率和幅度仍然高度不确定。然而，过去AIS的变化提供了了解当代和未来冰盖行为的机会。在这篇综述中，我们概述了AIS是如何从11700年前到1850年的工业化前全新世进化的。确定了冰盖行为的三个主要阶段：全新世早期和中期所有部门的冰量快速损失时期；现今的冰原边缘在某些地区向内陆退缩，随后又向前推进；在过去的几千年里，几个地区的冰量持续减少，有些地区一直持续到工业时代。由于南极冰的快速消融，全球海平面上升了2.4-12米，由于随后的推进，可能下降了0.35-1.2米。全新世期间AIS的变化很可能是由类似的过程驱动的，这些过程与今天的作用和预测的未来有关，这些过程与海洋和大气条件以及床地形有关。需要进一步的工作来更好地了解这些过程，并量化南极洲对过去海平面变化的贡献。
The rate and magnitude of the Antarctic Ice Sheet (AIS) contribution to global sea-level rise beyond 2100ceremains highly uncertain. Past changes of the AIS, however, offer opportunities to understand contemporary and future ice sheet behaviour. In this Review, we outline how the AIS evolved through the pre-industrial Holocene, 11,700 years ago to 1850ce. Three main phases of ice sheet behaviour are identified: a period of rapid ice volume loss across all sectors in the Early and Mid Holocene; a retreat inland of the present-day ice sheet margin in some sectors, followed by readvance; and continued ice volume loss in several sectors during the past few millennia, and in some areas up to and into the industrial era. Global sea levels rose by 2.4–12 m owing to the period of rapid Antarctic ice loss and possibly fell by 0.35–1.2 m owing to subsequent readvance. Changes in the AIS during the Holocene were likely driven by similar processes to those acting today and predicted for the future, which are associated with oceanic and atmospheric conditions as well as bed topography. Further work is required to better understand these processes and to quantify Antarctica’s contribution to past sea-level change.