Late Glacial history of the Ross Sea sector of the West Antarctic Ice Sheet: evidence from englacial layering at Talos Dome, East Antarctica
The timing of West Antarctic Ice Sheet (WAIS) expansion and retreat during the last glacial cycle is crucial to evaluating the processes controlling ice sheet fluctuations. There is currently debate as to whether grounded ice across what is now the Ross Ice Shelf decayed during the early Holocene or...
Published in: | Journal of Environmental and Engineering Geophysics |
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Society of Exploration Geophysicists
2007
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Online Access: | http://nora.nerc.ac.uk/id/eprint/11954/ http://jeeg.geoscienceworld.org/cgi/content/abstract/12/1/63 |
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ftnerc:oai:nora.nerc.ac.uk:11954 2023-05-15T13:45:10+02:00 Late Glacial history of the Ross Sea sector of the West Antarctic Ice Sheet: evidence from englacial layering at Talos Dome, East Antarctica Siegert, Martin J. Leysinger Vieli, Gwendolyn J.-M.C. 2007 http://nora.nerc.ac.uk/id/eprint/11954/ http://jeeg.geoscienceworld.org/cgi/content/abstract/12/1/63 unknown Society of Exploration Geophysicists Siegert, Martin J.; Leysinger Vieli, Gwendolyn J.-M.C. 2007 Late Glacial history of the Ross Sea sector of the West Antarctic Ice Sheet: evidence from englacial layering at Talos Dome, East Antarctica. Journal of Environmental and Engineering Geophysics, 12 (1). 63-67. https://doi.org/10.2113/JEEG12.1.63 <https://doi.org/10.2113/JEEG12.1.63> Glaciology Publication - Article PeerReviewed 2007 ftnerc https://doi.org/10.2113/JEEG12.1.63 2023-02-04T19:27:43Z The timing of West Antarctic Ice Sheet (WAIS) expansion and retreat during the last glacial cycle is crucial to evaluating the processes controlling ice sheet fluctuations. There is currently debate as to whether grounded ice across what is now the Ross Ice Shelf decayed during the early Holocene or at a time coincident with meltwater pulse 1a. Here we show, from analysis of englacial radio-echo layering across Talos Dome in Oates Land, East Antarctica, that the pattern of snowfall has been relatively consistent for the past 8,000–10,000 years. This was preceded by a transition from glacial maximum-type accumulation at between 10,000 and 20,000 years. We interpret glacial maximum accumulation rates to correspond with the expansion of the grounded WAIS across the Ross shelf, so preventing storm tracks from accessing Victoria Land as they do today (as identified previously at Taylor Dome). The return to modern-type accumulation after 8,000 years is consistent with geological evidence for WAIS retreat. No large-scale alteration in accumulation is observed around 14,000 years ago, during the time of meltwater pulse 1a. Article in Journal/Newspaper Antarc* Antarctic Antarctica Antarctica Journal East Antarctica Ice Sheet Ice Shelf Oates Land Ross Ice Shelf Ross Sea Victoria Land Natural Environment Research Council: NERC Open Research Archive Antarctic East Antarctica Ross Sea Victoria Land West Antarctic Ice Sheet Ross Ice Shelf Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) Taylor Dome ENVELOPE(157.667,157.667,-77.667,-77.667) Dome The ENVELOPE(166.000,166.000,-85.367,-85.367) Oates Land ENVELOPE(158.000,158.000,-70.000,-70.000) Journal of Environmental and Engineering Geophysics 12 1 63 67 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Glaciology |
spellingShingle |
Glaciology Siegert, Martin J. Leysinger Vieli, Gwendolyn J.-M.C. Late Glacial history of the Ross Sea sector of the West Antarctic Ice Sheet: evidence from englacial layering at Talos Dome, East Antarctica |
topic_facet |
Glaciology |
description |
The timing of West Antarctic Ice Sheet (WAIS) expansion and retreat during the last glacial cycle is crucial to evaluating the processes controlling ice sheet fluctuations. There is currently debate as to whether grounded ice across what is now the Ross Ice Shelf decayed during the early Holocene or at a time coincident with meltwater pulse 1a. Here we show, from analysis of englacial radio-echo layering across Talos Dome in Oates Land, East Antarctica, that the pattern of snowfall has been relatively consistent for the past 8,000–10,000 years. This was preceded by a transition from glacial maximum-type accumulation at between 10,000 and 20,000 years. We interpret glacial maximum accumulation rates to correspond with the expansion of the grounded WAIS across the Ross shelf, so preventing storm tracks from accessing Victoria Land as they do today (as identified previously at Taylor Dome). The return to modern-type accumulation after 8,000 years is consistent with geological evidence for WAIS retreat. No large-scale alteration in accumulation is observed around 14,000 years ago, during the time of meltwater pulse 1a. |
format |
Article in Journal/Newspaper |
author |
Siegert, Martin J. Leysinger Vieli, Gwendolyn J.-M.C. |
author_facet |
Siegert, Martin J. Leysinger Vieli, Gwendolyn J.-M.C. |
author_sort |
Siegert, Martin J. |
title |
Late Glacial history of the Ross Sea sector of the West Antarctic Ice Sheet: evidence from englacial layering at Talos Dome, East Antarctica |
title_short |
Late Glacial history of the Ross Sea sector of the West Antarctic Ice Sheet: evidence from englacial layering at Talos Dome, East Antarctica |
title_full |
Late Glacial history of the Ross Sea sector of the West Antarctic Ice Sheet: evidence from englacial layering at Talos Dome, East Antarctica |
title_fullStr |
Late Glacial history of the Ross Sea sector of the West Antarctic Ice Sheet: evidence from englacial layering at Talos Dome, East Antarctica |
title_full_unstemmed |
Late Glacial history of the Ross Sea sector of the West Antarctic Ice Sheet: evidence from englacial layering at Talos Dome, East Antarctica |
title_sort |
late glacial history of the ross sea sector of the west antarctic ice sheet: evidence from englacial layering at talos dome, east antarctica |
publisher |
Society of Exploration Geophysicists |
publishDate |
2007 |
url |
http://nora.nerc.ac.uk/id/eprint/11954/ http://jeeg.geoscienceworld.org/cgi/content/abstract/12/1/63 |
long_lat |
ENVELOPE(158.000,158.000,-73.000,-73.000) ENVELOPE(157.667,157.667,-77.667,-77.667) ENVELOPE(166.000,166.000,-85.367,-85.367) ENVELOPE(158.000,158.000,-70.000,-70.000) |
geographic |
Antarctic East Antarctica Ross Sea Victoria Land West Antarctic Ice Sheet Ross Ice Shelf Talos Dome Taylor Dome Dome The Oates Land |
geographic_facet |
Antarctic East Antarctica Ross Sea Victoria Land West Antarctic Ice Sheet Ross Ice Shelf Talos Dome Taylor Dome Dome The Oates Land |
genre |
Antarc* Antarctic Antarctica Antarctica Journal East Antarctica Ice Sheet Ice Shelf Oates Land Ross Ice Shelf Ross Sea Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Antarctica Journal East Antarctica Ice Sheet Ice Shelf Oates Land Ross Ice Shelf Ross Sea Victoria Land |
op_relation |
Siegert, Martin J.; Leysinger Vieli, Gwendolyn J.-M.C. 2007 Late Glacial history of the Ross Sea sector of the West Antarctic Ice Sheet: evidence from englacial layering at Talos Dome, East Antarctica. Journal of Environmental and Engineering Geophysics, 12 (1). 63-67. https://doi.org/10.2113/JEEG12.1.63 <https://doi.org/10.2113/JEEG12.1.63> |
op_doi |
https://doi.org/10.2113/JEEG12.1.63 |
container_title |
Journal of Environmental and Engineering Geophysics |
container_volume |
12 |
container_issue |
1 |
container_start_page |
63 |
op_container_end_page |
67 |
_version_ |
1766214821379833856 |