气候变化领域集成服务门户(CCPortal): Post-LGM dynamic deglaciation along the Victoria Land coast; Antarctica

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DOI	10.1016/j.quascirev.2020.106595
	Post-LGM dynamic deglaciation along the Victoria Land coast; Antarctica
	Rhee H.H.; Lee M.K.; Seong Y.B.; Lee J.I.; Yoo K.-C.; Yu B.Y.
发表日期	2020
ISSN	0277-3791
卷号	247
英文摘要	The post-Last Glacial Maximum (LGM) deglaciation of Antarctica holds important clues for understanding past environmental changes and predicting future changes in the Antarctic Ice Sheet. Cosmogenic nuclide exposure dating of glacial erratics documents the spatial and temporal glacier changes during the most recent deglaciation. We collected 55 erratic cobbles from the eight glaciated benches on Inexpressible Island, which is at the terminal area of Priestley Glacier, Terra Nova Bay, Victoria Land, to elucidate its post-LGM deglaciation pattern. Analyses of the 10Be ages and 26Al/10Be ratios suggest that Priestley Glacier underwent ∼254 m of lowering during the mid-Holocene, between 8.9 and 5.9 ka. This lowering rate (∼0.09 m a−1) is faster than those observed along other Victoria Land outlet glaciers to the north (Tucker and Aviator), but slower than those to the south (David, Mawson, and Mackay). The post-LGM lowering of these outlet glaciers was triggered by marine ice sheet instability, with their asynchronous onsets of deglaciation derived from their diachronous response times to the southwestward migration of the grounding-line retreat until their synchronous termination of deglaciation at ∼6 ka. A post-LGM deglaciation model with the southwestward migration of the western Ross Ice Shelf grounding line provides the best match to the terrestrial exposure dating results of the thinning patterns of the outlet glaciers along the Victoria Land coast. © 2020 Elsevier Ltd
英文关键词	Antarctica; Cosmogenic exposure dating; Deglaciation; Inexpressible island; Ross ice shelf; Terra Nova bay
语种	英语
scopus关键词	Glacial geology; Glaciers; Plants (botany); Antarctic ice sheets; Cosmogenic nuclides; Environmental change; Glacier change; Grounding line; Last Glacial Maximum; Ross ice shelves; Terra nova bays; Ice; deglaciation; environmental change; erratic; grounding line; ice sheet; spatiotemporal analysis; Antarctic Ice Sheet; Antarctica; East Antarctica; Ross Ice Shelf; Terra Nova Bay; Victoria Land; West Antarctica
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151296
作者单位	Department of Geography, Korea University, Seoul, 02841, South Korea; Division of Polar Paleoenvironment, Korea Polar Research Institute, Incheon, 21990, South Korea; AMS Laboratory, Korea Institute of Science and Technology, Seoul, 02792, South Korea
推荐引用方式 GB/T 7714	Rhee H.H.,Lee M.K.,Seong Y.B.,et al. Post-LGM dynamic deglaciation along the Victoria Land coast; Antarctica[J],2020,247.
APA	Rhee H.H.,Lee M.K.,Seong Y.B.,Lee J.I.,Yoo K.-C.,&Yu B.Y..(2020).Post-LGM dynamic deglaciation along the Victoria Land coast; Antarctica.Quaternary Science Reviews,247.
MLA	Rhee H.H.,et al."Post-LGM dynamic deglaciation along the Victoria Land coast; Antarctica".Quaternary Science Reviews 247(2020).