West Antarctic ice sheet fluctuations in the Antarctic Peninsula area
West Antarctic ice sheet fluctuations in the Antarctic Peninsula area
复制标题
南极半岛地区西南极冰盖波动
DOI：
10.1038/286378a0
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发表时间：
1980
期刊：
影响因子：
64.8
通讯作者：
C. Clapperton
中科院分区：
文献类型：
--
作者：
D. Sugden;C. Clapperton
南极西部冰盖被认为是天生不稳定的，因为它的大部分都在海平面以下。有人提出，冰盖已经从威斯康辛州晚期的最大位置撤回，以大陆架边缘为基础，作为对全新世的变暖和海平面上升的延迟反应，现在正在崩塌，而且由于大气中二氧化碳含量的上升，冰盖很可能很快就会崩塌。我们在这里提出了一些来自亚历山大岛和南极半岛的地貌证据，这些证据不同意这两种假设。更确切地说，在威斯康辛极大期的冰川消退之后，大约8000年前的冰比现在要少。随后，乔治六世湾的冰架逐渐形成。
The West Antarctic ice sheet is believed to be inherently unstable because much of it is grounded below sea level1–4. It has been suggested that the ice sheet has withdrawn from its late Wisconsin maximum position, grounded at the edge of the continental shelf, and is now undergoing collapse as a delayed response to the warming and sea-level rise of the Holocene5, and that the ice sheet is likely to collapse shortly in response to rising CO2 levels in the atmosphere6. We present here some geomorphological evidence from Alexander Island and the Antarctic Peninsula which does not agree with either hypothesis. Rather, following deglaciation from the Wisconsin maximum, there was less ice than at present around 8,000 yr ago. The ice shelf in George VI Sound has built up subsequently.