Early Holocene ice on the Begguya plateau (Mt. Hunter, Alaska) revealed by ice core 14C age constraints
Investigating North Pacific climate variability during warm intervals prior to the Common Era can improve our understanding of the behavior of ocean–atmosphere teleconnections between low latitudes and the Arctic under future warming scenarios. However, most of the existing ice core records from the...
Published in: | The Cryosphere |
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Copernicus Publications
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00068869 2023-10-09T21:49:18+02:00 Early Holocene ice on the Begguya plateau (Mt. Hunter, Alaska) revealed by ice core 14C age constraints Fang, Ling Jenk, Theo M. Winski, Dominic Kreutz, Karl Brooks, Hanna L. Erwin, Emma Osterberg, Erich Campbell, Seth Wake, Cameron Schwikowski, Margit 2023-09 electronic https://doi.org/10.5194/tc-17-4007-2023 https://noa.gwlb.de/receive/cop_mods_00068869 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067281/tc-17-4007-2023.pdf https://tc.copernicus.org/articles/17/4007/2023/tc-17-4007-2023.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-17-4007-2023 https://noa.gwlb.de/receive/cop_mods_00068869 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067281/tc-17-4007-2023.pdf https://tc.copernicus.org/articles/17/4007/2023/tc-17-4007-2023.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/tc-17-4007-2023 2023-09-17T23:34:49Z Investigating North Pacific climate variability during warm intervals prior to the Common Era can improve our understanding of the behavior of ocean–atmosphere teleconnections between low latitudes and the Arctic under future warming scenarios. However, most of the existing ice core records from the Alaskan and Yukon region only allow access to climate information covering the last few centuries. Here we present a surface-to-bedrock age scale for a 210 m long ice core recovered in 2013 from the summit plateau of Begguya (Mt. Hunter; Denali National Park, Central Alaska). Combining dating by annual layer counting with absolute dates from micro-radiocarbon dating, a continuous chronology for the entire ice core archive was established using an ice flow model. Calibrated 14C ages from the deepest section (209.1 m, 7.7 to 9.0 ka cal BP) indicate that basal ice on Begguya is at least of early Holocene origin. A series of samples from a shallower depth interval (199.8 to 206.6 m) were dated with near-uniform 14C ages (3 to 5 ka cal BP). Our results suggest this may be related to an increase in annual net snow accumulation rates over this period following the Northern Hemisphere Holocene Climate Optimum (around 8 to 5 kyr BP). With absolute dates constraining the timescale for the last >8 kyr BP, this paleo-archive will allow future investigations of Holocene climate and the regional evolution of spatial and temporal changes in atmospheric circulation and hydroclimate in the North Pacific. Article in Journal/Newspaper Arctic ice core The Cryosphere Alaska Yukon Niedersächsisches Online-Archiv NOA Arctic Yukon Pacific The Cryosphere 17 9 4007 4020 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Fang, Ling Jenk, Theo M. Winski, Dominic Kreutz, Karl Brooks, Hanna L. Erwin, Emma Osterberg, Erich Campbell, Seth Wake, Cameron Schwikowski, Margit Early Holocene ice on the Begguya plateau (Mt. Hunter, Alaska) revealed by ice core 14C age constraints |
topic_facet |
article Verlagsveröffentlichung |
description |
Investigating North Pacific climate variability during warm intervals prior to the Common Era can improve our understanding of the behavior of ocean–atmosphere teleconnections between low latitudes and the Arctic under future warming scenarios. However, most of the existing ice core records from the Alaskan and Yukon region only allow access to climate information covering the last few centuries. Here we present a surface-to-bedrock age scale for a 210 m long ice core recovered in 2013 from the summit plateau of Begguya (Mt. Hunter; Denali National Park, Central Alaska). Combining dating by annual layer counting with absolute dates from micro-radiocarbon dating, a continuous chronology for the entire ice core archive was established using an ice flow model. Calibrated 14C ages from the deepest section (209.1 m, 7.7 to 9.0 ka cal BP) indicate that basal ice on Begguya is at least of early Holocene origin. A series of samples from a shallower depth interval (199.8 to 206.6 m) were dated with near-uniform 14C ages (3 to 5 ka cal BP). Our results suggest this may be related to an increase in annual net snow accumulation rates over this period following the Northern Hemisphere Holocene Climate Optimum (around 8 to 5 kyr BP). With absolute dates constraining the timescale for the last >8 kyr BP, this paleo-archive will allow future investigations of Holocene climate and the regional evolution of spatial and temporal changes in atmospheric circulation and hydroclimate in the North Pacific. |
format |
Article in Journal/Newspaper |
author |
Fang, Ling Jenk, Theo M. Winski, Dominic Kreutz, Karl Brooks, Hanna L. Erwin, Emma Osterberg, Erich Campbell, Seth Wake, Cameron Schwikowski, Margit |
author_facet |
Fang, Ling Jenk, Theo M. Winski, Dominic Kreutz, Karl Brooks, Hanna L. Erwin, Emma Osterberg, Erich Campbell, Seth Wake, Cameron Schwikowski, Margit |
author_sort |
Fang, Ling |
title |
Early Holocene ice on the Begguya plateau (Mt. Hunter, Alaska) revealed by ice core 14C age constraints |
title_short |
Early Holocene ice on the Begguya plateau (Mt. Hunter, Alaska) revealed by ice core 14C age constraints |
title_full |
Early Holocene ice on the Begguya plateau (Mt. Hunter, Alaska) revealed by ice core 14C age constraints |
title_fullStr |
Early Holocene ice on the Begguya plateau (Mt. Hunter, Alaska) revealed by ice core 14C age constraints |
title_full_unstemmed |
Early Holocene ice on the Begguya plateau (Mt. Hunter, Alaska) revealed by ice core 14C age constraints |
title_sort |
early holocene ice on the begguya plateau (mt. hunter, alaska) revealed by ice core 14c age constraints |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-17-4007-2023 https://noa.gwlb.de/receive/cop_mods_00068869 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067281/tc-17-4007-2023.pdf https://tc.copernicus.org/articles/17/4007/2023/tc-17-4007-2023.pdf |
geographic |
Arctic Yukon Pacific |
geographic_facet |
Arctic Yukon Pacific |
genre |
Arctic ice core The Cryosphere Alaska Yukon |
genre_facet |
Arctic ice core The Cryosphere Alaska Yukon |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-17-4007-2023 https://noa.gwlb.de/receive/cop_mods_00068869 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067281/tc-17-4007-2023.pdf https://tc.copernicus.org/articles/17/4007/2023/tc-17-4007-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-17-4007-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
9 |
container_start_page |
4007 |
op_container_end_page |
4020 |
_version_ |
1779312322285666304 |