Glacial history of Pyramid Trough, southern McMurdo Sound, Antarctica: Constraints on Koettlitz Glacier during the last glacial maximum and termination
Reconstructions of past glacier extent and timing afford perspective on the efficacy of mechanisms thought to control ice-sheet fluctuations. Here, we present data concerning the interactions between the Antarctic Ice Sheet and a local glacier (Koettlitz Glacier) in the McMurdo Sound region of the w...
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ftdoajarticles:oai:doaj.org/article:15ed07290a5c44dfac4a1aaeac6ac809 2023-06-11T04:06:32+02:00 Glacial history of Pyramid Trough, southern McMurdo Sound, Antarctica: Constraints on Koettlitz Glacier during the last glacial maximum and termination Tess Walther Brenda Hall George Denton Chris Hendy 2023-07-01T00:00:00Z https://doi.org/10.1016/j.qsa.2023.100089 https://doaj.org/article/15ed07290a5c44dfac4a1aaeac6ac809 EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S2666033423000217 https://doaj.org/toc/2666-0334 2666-0334 doi:10.1016/j.qsa.2023.100089 https://doaj.org/article/15ed07290a5c44dfac4a1aaeac6ac809 Quaternary Science Advances, Vol 11, Iss , Pp 100089- (2023) Last glacial maximum Antarctic ice sheet Alpine glaciers Radiocarbon Lake-ice conveyor Geography. Anthropology. Recreation G Archaeology CC1-960 article 2023 ftdoajarticles https://doi.org/10.1016/j.qsa.2023.100089 2023-05-28T00:36:49Z Reconstructions of past glacier extent and timing afford perspective on the efficacy of mechanisms thought to control ice-sheet fluctuations. Here, we present data concerning the interactions between the Antarctic Ice Sheet and a local glacier (Koettlitz Glacier) in the McMurdo Sound region of the western Ross Embayment and use this information to gain insight into driving forces of ice expansion in this sector during the last glacial maximum (LGM; 24–18 ka) and termination (18–13 ka). Our data suggest that a grounded ice sheet in McMurdo Sound at the LGM resulted not from expansion of local glaciers, such as Koettlitz, from the continent but rather from flow of marine-based ice into the sound from the Ross Sea. We infer that the relative importance of different forcing mechanisms, such as sea-level rise, ocean-temperature change, and accumulation variations, explains the contrasting behavior of the grounded marine ice sheet in the Ross Sea and local glaciers adjacent to McMurdo Sound, with Ross Sea ice responding primarily to marine forcing and local glaciers influenced strongly by accumulation. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Koettlitz Glacier McMurdo Sound Ross Sea Sea ice Directory of Open Access Journals: DOAJ Articles Antarctic Glacier Koettlitz ENVELOPE(164.250,164.250,-78.250,-78.250) Koettlitz Glacier ENVELOPE(164.250,164.250,-78.250,-78.250) McMurdo Sound Pyramid ENVELOPE(157.300,157.300,-81.333,-81.333) Pyramid Trough ENVELOPE(163.450,163.450,-78.300,-78.300) Ross Sea The Antarctic Quaternary Science Advances 11 100089 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Last glacial maximum Antarctic ice sheet Alpine glaciers Radiocarbon Lake-ice conveyor Geography. Anthropology. Recreation G Archaeology CC1-960 |
spellingShingle |
Last glacial maximum Antarctic ice sheet Alpine glaciers Radiocarbon Lake-ice conveyor Geography. Anthropology. Recreation G Archaeology CC1-960 Tess Walther Brenda Hall George Denton Chris Hendy Glacial history of Pyramid Trough, southern McMurdo Sound, Antarctica: Constraints on Koettlitz Glacier during the last glacial maximum and termination |
topic_facet |
Last glacial maximum Antarctic ice sheet Alpine glaciers Radiocarbon Lake-ice conveyor Geography. Anthropology. Recreation G Archaeology CC1-960 |
description |
Reconstructions of past glacier extent and timing afford perspective on the efficacy of mechanisms thought to control ice-sheet fluctuations. Here, we present data concerning the interactions between the Antarctic Ice Sheet and a local glacier (Koettlitz Glacier) in the McMurdo Sound region of the western Ross Embayment and use this information to gain insight into driving forces of ice expansion in this sector during the last glacial maximum (LGM; 24–18 ka) and termination (18–13 ka). Our data suggest that a grounded ice sheet in McMurdo Sound at the LGM resulted not from expansion of local glaciers, such as Koettlitz, from the continent but rather from flow of marine-based ice into the sound from the Ross Sea. We infer that the relative importance of different forcing mechanisms, such as sea-level rise, ocean-temperature change, and accumulation variations, explains the contrasting behavior of the grounded marine ice sheet in the Ross Sea and local glaciers adjacent to McMurdo Sound, with Ross Sea ice responding primarily to marine forcing and local glaciers influenced strongly by accumulation. |
format |
Article in Journal/Newspaper |
author |
Tess Walther Brenda Hall George Denton Chris Hendy |
author_facet |
Tess Walther Brenda Hall George Denton Chris Hendy |
author_sort |
Tess Walther |
title |
Glacial history of Pyramid Trough, southern McMurdo Sound, Antarctica: Constraints on Koettlitz Glacier during the last glacial maximum and termination |
title_short |
Glacial history of Pyramid Trough, southern McMurdo Sound, Antarctica: Constraints on Koettlitz Glacier during the last glacial maximum and termination |
title_full |
Glacial history of Pyramid Trough, southern McMurdo Sound, Antarctica: Constraints on Koettlitz Glacier during the last glacial maximum and termination |
title_fullStr |
Glacial history of Pyramid Trough, southern McMurdo Sound, Antarctica: Constraints on Koettlitz Glacier during the last glacial maximum and termination |
title_full_unstemmed |
Glacial history of Pyramid Trough, southern McMurdo Sound, Antarctica: Constraints on Koettlitz Glacier during the last glacial maximum and termination |
title_sort |
glacial history of pyramid trough, southern mcmurdo sound, antarctica: constraints on koettlitz glacier during the last glacial maximum and termination |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://doi.org/10.1016/j.qsa.2023.100089 https://doaj.org/article/15ed07290a5c44dfac4a1aaeac6ac809 |
long_lat |
ENVELOPE(164.250,164.250,-78.250,-78.250) ENVELOPE(164.250,164.250,-78.250,-78.250) ENVELOPE(157.300,157.300,-81.333,-81.333) ENVELOPE(163.450,163.450,-78.300,-78.300) |
geographic |
Antarctic Glacier Koettlitz Koettlitz Glacier McMurdo Sound Pyramid Pyramid Trough Ross Sea The Antarctic |
geographic_facet |
Antarctic Glacier Koettlitz Koettlitz Glacier McMurdo Sound Pyramid Pyramid Trough Ross Sea The Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Sheet Koettlitz Glacier McMurdo Sound Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Koettlitz Glacier McMurdo Sound Ross Sea Sea ice |
op_source |
Quaternary Science Advances, Vol 11, Iss , Pp 100089- (2023) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S2666033423000217 https://doaj.org/toc/2666-0334 2666-0334 doi:10.1016/j.qsa.2023.100089 https://doaj.org/article/15ed07290a5c44dfac4a1aaeac6ac809 |
op_doi |
https://doi.org/10.1016/j.qsa.2023.100089 |
container_title |
Quaternary Science Advances |
container_volume |
11 |
container_start_page |
100089 |
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1768378525955391488 |