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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Environmental & Engineering Geophysical Society
2007
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Online Access: | https://www.zora.uzh.ch/id/eprint/139523/ https://www.zora.uzh.ch/139523 https://doi.org/10.2113/JEEG12.1.63 |
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ftunivzuerich:oai:www.zora.uzh.ch:139523 2024-09-30T14:26:02+00:00 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 2007 https://www.zora.uzh.ch/id/eprint/139523/ https://www.zora.uzh.ch/139523 https://doi.org/10.2113/JEEG12.1.63 eng eng Environmental & Engineering Geophysical Society https://www.zora.uzh.ch/139523 doi:10.2113/JEEG12.1.63 urn:issn:1083-1363 info:eu-repo/semantics/closedAccess Siegert, Martin J; Leysinger Vieli, Gwendolyn (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 & Engineering Geophysics, 12(1):63-67. Institute of Geography 910 Geography & travel Journal Article PeerReviewed info:eu-repo/semantics/article 2007 ftunivzuerich https://doi.org/10.2113/JEEG12.1.63 2024-09-18T00:49:48Z 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 University of Zurich (UZH): ZORA (Zurich Open Repository and Archive Antarctic Dome The ENVELOPE(166.000,166.000,-85.367,-85.367) East Antarctica Oates Land ENVELOPE(158.000,158.000,-70.000,-70.000) Ross Ice Shelf Ross Sea Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) Taylor Dome ENVELOPE(157.667,157.667,-77.667,-77.667) Victoria Land West Antarctic Ice Sheet Journal of Environmental and Engineering Geophysics 12 1 63 67 |
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Open Polar |
collection |
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive |
op_collection_id |
ftunivzuerich |
language |
English |
topic |
Institute of Geography 910 Geography & travel |
spellingShingle |
Institute of Geography 910 Geography & travel Siegert, Martin J Leysinger Vieli, Gwendolyn 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 |
Institute of Geography 910 Geography & travel |
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 |
author_facet |
Siegert, Martin J Leysinger Vieli, Gwendolyn |
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 |
Environmental & Engineering Geophysical Society |
publishDate |
2007 |
url |
https://www.zora.uzh.ch/id/eprint/139523/ https://www.zora.uzh.ch/139523 https://doi.org/10.2113/JEEG12.1.63 |
long_lat |
ENVELOPE(166.000,166.000,-85.367,-85.367) ENVELOPE(158.000,158.000,-70.000,-70.000) ENVELOPE(158.000,158.000,-73.000,-73.000) ENVELOPE(157.667,157.667,-77.667,-77.667) |
geographic |
Antarctic Dome The East Antarctica Oates Land Ross Ice Shelf Ross Sea Talos Dome Taylor Dome Victoria Land West Antarctic Ice Sheet |
geographic_facet |
Antarctic Dome The East Antarctica Oates Land Ross Ice Shelf Ross Sea Talos Dome Taylor Dome Victoria Land West Antarctic Ice Sheet |
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_source |
Siegert, Martin J; Leysinger Vieli, Gwendolyn (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 & Engineering Geophysics, 12(1):63-67. |
op_relation |
https://www.zora.uzh.ch/139523 doi:10.2113/JEEG12.1.63 urn:issn:1083-1363 |
op_rights |
info:eu-repo/semantics/closedAccess |
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_ |
1811646555678048256 |