Reconstructing the post-LGM deglacial history of Hollingsworth Glacier on Ricker Hills, Transantarctic Mountains, Antarctica
The Transantarctic Mountains are an important corridor between the East Antarctic Ice Sheet and the Western Ross Sea, where most current ice streams and outlet glaciers arise. We investigated Ricker Hills, the largest exposed mountainous region between Southern Victoria Land and Terra Nova Bay, and...
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Institute of Mountain Hazards and Environment, Chinese Academy of Sciences
2022
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ftseoulnuniv:oai:s-space.snu.ac.kr:10371/182669 2023-05-15T13:32:30+02:00 Reconstructing the post-LGM deglacial history of Hollingsworth Glacier on Ricker Hills, Transantarctic Mountains, Antarctica RHEE, Hyun-Hee SEONG, Yeong-Bae WOO, Ju-Sun Oh, Changhwan YU, Byung-Yong WOO, Ju-Sun 2022-05-31 https://hdl.handle.net/10371/182669 영어 unknown Institute of Mountain Hazards and Environment, Chinese Academy of Sciences Journal of Mountain Science, Vol.19 No.5, pp.1217-1230 1672-6316 https://hdl.handle.net/10371/182669 000796067700001 162955 Article ART 2022 ftseoulnuniv 2023-02-10T02:34:15Z The Transantarctic Mountains are an important corridor between the East Antarctic Ice Sheet and the Western Ross Sea, where most current ice streams and outlet glaciers arise. We investigated Ricker Hills, the largest exposed mountainous region between Southern Victoria Land and Terra Nova Bay, and dated the glacial landforms using in-situ cosmogenic-nuclide Be-10 surface exposure dating to reconstruct the paleo-glacial dynamics. The surface of the Hollingsworth glacier lowered since the middle of Marine Isotope Stage (MIS) 2 (22.1 ka); therefore, the Last Glacial Maximum (LGM) occurred before that period. Cosmogenic, geomorphic, and climatic records constrained the glacial surface slope to be between 5.4 degrees and 6.8 degrees. The ice was 270-320 m thicker at the LGM (MIS 2) than presently but did not override the top surface of the Benson Knob. Moreover, previous glacial periods such as the local LGM (MIS 4) or Penultimate Glacial Maximum (MIS 6) maintained thicker ice than the LGM (MIS 2). The Ross Ice Shelf opening during the mid-Holocene (similar to 6 ka) caused the rapid collapse of the terminal outlet glaciers and supplied notable snow accumulation upstream, which stagnated lowering. The greatest lowering and retreat occurred during the late Holocene (2.3 similar to 0.8 ka), when elephant seal colonies thrived in the Ross Embayment. N 1 Article in Journal/Newspaper Antarc* Antarctic Antarctica Elephant Seal Ice Sheet Ice Shelf Ross Ice Shelf Ross Sea Victoria Land Seoul National University: S-Space Antarctic Benson Knob ENVELOPE(159.283,159.283,-75.750,-75.750) East Antarctic Ice Sheet Hollingsworth ENVELOPE(50.367,50.367,-67.250,-67.250) Hollingsworth Glacier ENVELOPE(159.950,159.950,-75.550,-75.550) Ricker Hills ENVELOPE(159.167,159.167,-75.683,-75.683) Ross Ice Shelf Ross Sea Terra Nova Bay Transantarctic Mountains Victoria Land |
institution |
Open Polar |
collection |
Seoul National University: S-Space |
op_collection_id |
ftseoulnuniv |
language |
unknown |
description |
The Transantarctic Mountains are an important corridor between the East Antarctic Ice Sheet and the Western Ross Sea, where most current ice streams and outlet glaciers arise. We investigated Ricker Hills, the largest exposed mountainous region between Southern Victoria Land and Terra Nova Bay, and dated the glacial landforms using in-situ cosmogenic-nuclide Be-10 surface exposure dating to reconstruct the paleo-glacial dynamics. The surface of the Hollingsworth glacier lowered since the middle of Marine Isotope Stage (MIS) 2 (22.1 ka); therefore, the Last Glacial Maximum (LGM) occurred before that period. Cosmogenic, geomorphic, and climatic records constrained the glacial surface slope to be between 5.4 degrees and 6.8 degrees. The ice was 270-320 m thicker at the LGM (MIS 2) than presently but did not override the top surface of the Benson Knob. Moreover, previous glacial periods such as the local LGM (MIS 4) or Penultimate Glacial Maximum (MIS 6) maintained thicker ice than the LGM (MIS 2). The Ross Ice Shelf opening during the mid-Holocene (similar to 6 ka) caused the rapid collapse of the terminal outlet glaciers and supplied notable snow accumulation upstream, which stagnated lowering. The greatest lowering and retreat occurred during the late Holocene (2.3 similar to 0.8 ka), when elephant seal colonies thrived in the Ross Embayment. N 1 |
author2 |
WOO, Ju-Sun |
format |
Article in Journal/Newspaper |
author |
RHEE, Hyun-Hee SEONG, Yeong-Bae WOO, Ju-Sun Oh, Changhwan YU, Byung-Yong |
spellingShingle |
RHEE, Hyun-Hee SEONG, Yeong-Bae WOO, Ju-Sun Oh, Changhwan YU, Byung-Yong Reconstructing the post-LGM deglacial history of Hollingsworth Glacier on Ricker Hills, Transantarctic Mountains, Antarctica |
author_facet |
RHEE, Hyun-Hee SEONG, Yeong-Bae WOO, Ju-Sun Oh, Changhwan YU, Byung-Yong |
author_sort |
RHEE, Hyun-Hee |
title |
Reconstructing the post-LGM deglacial history of Hollingsworth Glacier on Ricker Hills, Transantarctic Mountains, Antarctica |
title_short |
Reconstructing the post-LGM deglacial history of Hollingsworth Glacier on Ricker Hills, Transantarctic Mountains, Antarctica |
title_full |
Reconstructing the post-LGM deglacial history of Hollingsworth Glacier on Ricker Hills, Transantarctic Mountains, Antarctica |
title_fullStr |
Reconstructing the post-LGM deglacial history of Hollingsworth Glacier on Ricker Hills, Transantarctic Mountains, Antarctica |
title_full_unstemmed |
Reconstructing the post-LGM deglacial history of Hollingsworth Glacier on Ricker Hills, Transantarctic Mountains, Antarctica |
title_sort |
reconstructing the post-lgm deglacial history of hollingsworth glacier on ricker hills, transantarctic mountains, antarctica |
publisher |
Institute of Mountain Hazards and Environment, Chinese Academy of Sciences |
publishDate |
2022 |
url |
https://hdl.handle.net/10371/182669 |
long_lat |
ENVELOPE(159.283,159.283,-75.750,-75.750) ENVELOPE(50.367,50.367,-67.250,-67.250) ENVELOPE(159.950,159.950,-75.550,-75.550) ENVELOPE(159.167,159.167,-75.683,-75.683) |
geographic |
Antarctic Benson Knob East Antarctic Ice Sheet Hollingsworth Hollingsworth Glacier Ricker Hills Ross Ice Shelf Ross Sea Terra Nova Bay Transantarctic Mountains Victoria Land |
geographic_facet |
Antarctic Benson Knob East Antarctic Ice Sheet Hollingsworth Hollingsworth Glacier Ricker Hills Ross Ice Shelf Ross Sea Terra Nova Bay Transantarctic Mountains Victoria Land |
genre |
Antarc* Antarctic Antarctica Elephant Seal Ice Sheet Ice Shelf Ross Ice Shelf Ross Sea Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Elephant Seal Ice Sheet Ice Shelf Ross Ice Shelf Ross Sea Victoria Land |
op_relation |
Journal of Mountain Science, Vol.19 No.5, pp.1217-1230 1672-6316 https://hdl.handle.net/10371/182669 000796067700001 162955 |
_version_ |
1766027481663406080 |