Atmospheric gas records from Taylor Glacier, Antarctica, reveal ancient ice with ages spanning the entire last glacial cycle
Old ice for paleo-environmental studies, traditionally accessed through deep core drilling on domes and ridges on the large ice sheets, can also be retrieved at the surface from ice sheet margins and blue ice areas. The practically unlimited amount of ice available at these sites satisfies a need in...
Published in: | Climate of the Past |
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Copernicus Publications
2017
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00009563 2023-05-15T13:34:49+02:00 Atmospheric gas records from Taylor Glacier, Antarctica, reveal ancient ice with ages spanning the entire last glacial cycle Baggenstos, Daniel Bauska, Thomas K. Severinghaus, Jeffrey P. Lee, James E. Schaefer, Hinrich Buizert, Christo Brook, Edward J. Shackleton, Sarah Petrenko, Vasilii V. 2017-07 electronic https://doi.org/10.5194/cp-13-943-2017 https://noa.gwlb.de/receive/cop_mods_00009563 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00009520/cp-13-943-2017.pdf https://cp.copernicus.org/articles/13/943/2017/cp-13-943-2017.pdf eng eng Copernicus Publications Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-13-943-2017 https://noa.gwlb.de/receive/cop_mods_00009563 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00009520/cp-13-943-2017.pdf https://cp.copernicus.org/articles/13/943/2017/cp-13-943-2017.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2017 ftnonlinearchiv https://doi.org/10.5194/cp-13-943-2017 2022-02-08T22:57:30Z Old ice for paleo-environmental studies, traditionally accessed through deep core drilling on domes and ridges on the large ice sheets, can also be retrieved at the surface from ice sheet margins and blue ice areas. The practically unlimited amount of ice available at these sites satisfies a need in the community for studies of trace components requiring large sample volumes. For margin sites to be useful as ancient ice archives, the ice stratigraphy needs to be understood and age models need to be established. We present measurements of trapped gases in ice from Taylor Glacier, Antarctica, to date the ice and assess the completeness of the stratigraphic section. Using δ18O of O2 and methane concentrations, we unambiguously identify ice from the last glacial cycle, covering every climate interval from the early Holocene to the penultimate interglacial. A high-resolution transect reveals the last deglaciation and the Last Glacial Maximum (LGM) in detail. We observe large-scale deformation in the form of folding, but individual stratigraphic layers do not appear to have undergone irregular thinning. Rather, it appears that the entire LGM–deglaciation sequence has been transported from the interior of the ice sheet to the surface of Taylor Glacier relatively undisturbed. We present an age model that builds the foundation for gas studies on Taylor Glacier. A comparison with the Taylor Dome ice core confirms that the section we studied on Taylor Glacier is better suited for paleo-climate reconstructions of the LGM due to higher accumulation rates. Article in Journal/Newspaper Antarc* Antarctica ice core Ice Sheet Taylor Glacier Niedersächsisches Online-Archiv NOA Taylor Dome ENVELOPE(157.667,157.667,-77.667,-77.667) Taylor Glacier ENVELOPE(162.167,162.167,-77.733,-77.733) Climate of the Past 13 7 943 958 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Baggenstos, Daniel Bauska, Thomas K. Severinghaus, Jeffrey P. Lee, James E. Schaefer, Hinrich Buizert, Christo Brook, Edward J. Shackleton, Sarah Petrenko, Vasilii V. Atmospheric gas records from Taylor Glacier, Antarctica, reveal ancient ice with ages spanning the entire last glacial cycle |
topic_facet |
article Verlagsveröffentlichung |
description |
Old ice for paleo-environmental studies, traditionally accessed through deep core drilling on domes and ridges on the large ice sheets, can also be retrieved at the surface from ice sheet margins and blue ice areas. The practically unlimited amount of ice available at these sites satisfies a need in the community for studies of trace components requiring large sample volumes. For margin sites to be useful as ancient ice archives, the ice stratigraphy needs to be understood and age models need to be established. We present measurements of trapped gases in ice from Taylor Glacier, Antarctica, to date the ice and assess the completeness of the stratigraphic section. Using δ18O of O2 and methane concentrations, we unambiguously identify ice from the last glacial cycle, covering every climate interval from the early Holocene to the penultimate interglacial. A high-resolution transect reveals the last deglaciation and the Last Glacial Maximum (LGM) in detail. We observe large-scale deformation in the form of folding, but individual stratigraphic layers do not appear to have undergone irregular thinning. Rather, it appears that the entire LGM–deglaciation sequence has been transported from the interior of the ice sheet to the surface of Taylor Glacier relatively undisturbed. We present an age model that builds the foundation for gas studies on Taylor Glacier. A comparison with the Taylor Dome ice core confirms that the section we studied on Taylor Glacier is better suited for paleo-climate reconstructions of the LGM due to higher accumulation rates. |
format |
Article in Journal/Newspaper |
author |
Baggenstos, Daniel Bauska, Thomas K. Severinghaus, Jeffrey P. Lee, James E. Schaefer, Hinrich Buizert, Christo Brook, Edward J. Shackleton, Sarah Petrenko, Vasilii V. |
author_facet |
Baggenstos, Daniel Bauska, Thomas K. Severinghaus, Jeffrey P. Lee, James E. Schaefer, Hinrich Buizert, Christo Brook, Edward J. Shackleton, Sarah Petrenko, Vasilii V. |
author_sort |
Baggenstos, Daniel |
title |
Atmospheric gas records from Taylor Glacier, Antarctica, reveal ancient ice with ages spanning the entire last glacial cycle |
title_short |
Atmospheric gas records from Taylor Glacier, Antarctica, reveal ancient ice with ages spanning the entire last glacial cycle |
title_full |
Atmospheric gas records from Taylor Glacier, Antarctica, reveal ancient ice with ages spanning the entire last glacial cycle |
title_fullStr |
Atmospheric gas records from Taylor Glacier, Antarctica, reveal ancient ice with ages spanning the entire last glacial cycle |
title_full_unstemmed |
Atmospheric gas records from Taylor Glacier, Antarctica, reveal ancient ice with ages spanning the entire last glacial cycle |
title_sort |
atmospheric gas records from taylor glacier, antarctica, reveal ancient ice with ages spanning the entire last glacial cycle |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/cp-13-943-2017 https://noa.gwlb.de/receive/cop_mods_00009563 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00009520/cp-13-943-2017.pdf https://cp.copernicus.org/articles/13/943/2017/cp-13-943-2017.pdf |
long_lat |
ENVELOPE(157.667,157.667,-77.667,-77.667) ENVELOPE(162.167,162.167,-77.733,-77.733) |
geographic |
Taylor Dome Taylor Glacier |
geographic_facet |
Taylor Dome Taylor Glacier |
genre |
Antarc* Antarctica ice core Ice Sheet Taylor Glacier |
genre_facet |
Antarc* Antarctica ice core Ice Sheet Taylor Glacier |
op_relation |
Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-13-943-2017 https://noa.gwlb.de/receive/cop_mods_00009563 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00009520/cp-13-943-2017.pdf https://cp.copernicus.org/articles/13/943/2017/cp-13-943-2017.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-13-943-2017 |
container_title |
Climate of the Past |
container_volume |
13 |
container_issue |
7 |
container_start_page |
943 |
op_container_end_page |
958 |
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1766057957102977024 |