KOPRI Repository

Post-LGM dynamic deglaciation along the Victoria Land coast, Antarctica

Cited 0 time in wos
Cited 0 time in scopus
Metadata Downloads
Title
Post-LGM dynamic deglaciation along the Victoria Land coast, Antarctica
Other Titles
남극 빅토리아랜드의 마지막최대빙하기 이후의 해빙 역사
Authors
Rhee, Hyun Hee
Lee, Min Kyung
Seong, Yeong Bae
Lee, Jae Il
Yoo, Kyu-Cheul
Yu, Byung Yong
Subject
Physical Geography; Geology
Keywords
Antarctica; Terra Nova bay; Inexpressible island; Deglaciation; Cosmogenic exposure dating; Ross ice shelf
Issue Date
2020-11
Citation
Rhee, Hyun Hee, et al. 2020. "Post-LGM dynamic deglaciation along the Victoria Land coast, Antarctica". QUATERNARY SCIENCE REVIEWS, 247(1): 106595-10659.
Abstract
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 the one to the south (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.
URI
https://repository.kopri.re.kr/handle/201206/11793
DOI
http://dx.doi.org/10.1016/j.quascirev.2020.106595
Appears in Collections  
2020-2020, Ice sheet retreat and ocean circulation in West Antarctica during the past warm periods (20-20) / Yoo, Kyu-Cheul (PE20180)
Files in This Item

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse