The Antarctic Ice Core Chronology 2023 (AICC2023) chronological framework and associated timescale for the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core
The EPICA (European Project for Ice Coring in Antarctica) Dome C (EDC) ice core drilling in East Antarctica reaches a depth of 3260 m. The reference EDC chronology, the AICC2012 (Antarctic Ice Core Chronology 2012), provides an age vs. depth relationship covering the last 800 kyr (thousands of years...
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Copernicus Publications
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00069783 2023-12-10T09:41:00+01:00 The Antarctic Ice Core Chronology 2023 (AICC2023) chronological framework and associated timescale for the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core Bouchet, Marie Landais, Amaëlle Grisart, Antoine Parrenin, Frédéric Prié, Frédéric Jacob, Roxanne Fourré, Elise Capron, Emilie Raynaud, Dominique Lipenkov, Vladimir Ya Loutre, Marie-France Extier, Thomas Svensson, Anders Legrain, Etienne Martinerie, Patricia Leuenberger, Markus Jiang, Wei Ritterbusch, Florian Lu, Zheng-Tian Yang, Guo-Min 2023-11 electronic https://doi.org/10.5194/cp-19-2257-2023 https://noa.gwlb.de/receive/cop_mods_00069783 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068154/cp-19-2257-2023.pdf https://cp.copernicus.org/articles/19/2257/2023/cp-19-2257-2023.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-19-2257-2023 https://noa.gwlb.de/receive/cop_mods_00069783 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068154/cp-19-2257-2023.pdf https://cp.copernicus.org/articles/19/2257/2023/cp-19-2257-2023.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/cp-19-2257-2023 2023-11-13T00:22:45Z The EPICA (European Project for Ice Coring in Antarctica) Dome C (EDC) ice core drilling in East Antarctica reaches a depth of 3260 m. The reference EDC chronology, the AICC2012 (Antarctic Ice Core Chronology 2012), provides an age vs. depth relationship covering the last 800 kyr (thousands of years), with an absolute uncertainty rising up to 8000 years at the bottom of the ice core. The origins of this relatively large uncertainty are twofold: (1) the δ18Oatm, δO2/N2 and total air content (TAC) records are poorly resolved and show large gaps over the last 800 kyr, and (2) large uncertainties are associated with their orbital targets. Here, we present new highly resolved δ18Oatm, δO2/N2 and δ15N measurements for the EDC ice core covering the last five glacial–interglacial transitions; a new low-resolution TAC record over the period 440–800 ka BP (ka: 1000 years before 1950); and novel absolute 81Kr ages. We have compiled chronological and glaciological information including novel orbital age markers from new data on the EDC ice core as well as accurate firn modeling estimates in a Bayesian dating tool to construct the new AICC2023 chronology. For the first time, three orbital tools are used simultaneously. Hence, it is possible to observe that they are consistent with each other and with the other age markers over most of the last 800 kyr (70 %). This, in turn, gives us confidence in the new AICC2023 chronology. The average uncertainty in the ice chronology is reduced from 1700 to 900 years in AICC2023 over the last 800 kyr (1σ). The new timescale diverges from AICC2012 and suggests age shifts reaching 3800 years towards older ages over marine isotope stages (MISs) 5, 11 and 19. But the coherency between the new AICC2023 timescale and independent chronologies of other archives (Italian Lacustrine succession from Sulmona Basin, Dome Fuji ice core and northern Alpine speleothems) is improved by 1000 to 2000 years over these time intervals. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica EPICA ice core Niedersächsisches Online-Archiv NOA Antarctic The Antarctic East Antarctica Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) Tac ENVELOPE(-59.517,-59.517,-62.500,-62.500) Climate of the Past 19 11 2257 2286 |
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Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Bouchet, Marie Landais, Amaëlle Grisart, Antoine Parrenin, Frédéric Prié, Frédéric Jacob, Roxanne Fourré, Elise Capron, Emilie Raynaud, Dominique Lipenkov, Vladimir Ya Loutre, Marie-France Extier, Thomas Svensson, Anders Legrain, Etienne Martinerie, Patricia Leuenberger, Markus Jiang, Wei Ritterbusch, Florian Lu, Zheng-Tian Yang, Guo-Min The Antarctic Ice Core Chronology 2023 (AICC2023) chronological framework and associated timescale for the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core |
topic_facet |
article Verlagsveröffentlichung |
description |
The EPICA (European Project for Ice Coring in Antarctica) Dome C (EDC) ice core drilling in East Antarctica reaches a depth of 3260 m. The reference EDC chronology, the AICC2012 (Antarctic Ice Core Chronology 2012), provides an age vs. depth relationship covering the last 800 kyr (thousands of years), with an absolute uncertainty rising up to 8000 years at the bottom of the ice core. The origins of this relatively large uncertainty are twofold: (1) the δ18Oatm, δO2/N2 and total air content (TAC) records are poorly resolved and show large gaps over the last 800 kyr, and (2) large uncertainties are associated with their orbital targets. Here, we present new highly resolved δ18Oatm, δO2/N2 and δ15N measurements for the EDC ice core covering the last five glacial–interglacial transitions; a new low-resolution TAC record over the period 440–800 ka BP (ka: 1000 years before 1950); and novel absolute 81Kr ages. We have compiled chronological and glaciological information including novel orbital age markers from new data on the EDC ice core as well as accurate firn modeling estimates in a Bayesian dating tool to construct the new AICC2023 chronology. For the first time, three orbital tools are used simultaneously. Hence, it is possible to observe that they are consistent with each other and with the other age markers over most of the last 800 kyr (70 %). This, in turn, gives us confidence in the new AICC2023 chronology. The average uncertainty in the ice chronology is reduced from 1700 to 900 years in AICC2023 over the last 800 kyr (1σ). The new timescale diverges from AICC2012 and suggests age shifts reaching 3800 years towards older ages over marine isotope stages (MISs) 5, 11 and 19. But the coherency between the new AICC2023 timescale and independent chronologies of other archives (Italian Lacustrine succession from Sulmona Basin, Dome Fuji ice core and northern Alpine speleothems) is improved by 1000 to 2000 years over these time intervals. |
format |
Article in Journal/Newspaper |
author |
Bouchet, Marie Landais, Amaëlle Grisart, Antoine Parrenin, Frédéric Prié, Frédéric Jacob, Roxanne Fourré, Elise Capron, Emilie Raynaud, Dominique Lipenkov, Vladimir Ya Loutre, Marie-France Extier, Thomas Svensson, Anders Legrain, Etienne Martinerie, Patricia Leuenberger, Markus Jiang, Wei Ritterbusch, Florian Lu, Zheng-Tian Yang, Guo-Min |
author_facet |
Bouchet, Marie Landais, Amaëlle Grisart, Antoine Parrenin, Frédéric Prié, Frédéric Jacob, Roxanne Fourré, Elise Capron, Emilie Raynaud, Dominique Lipenkov, Vladimir Ya Loutre, Marie-France Extier, Thomas Svensson, Anders Legrain, Etienne Martinerie, Patricia Leuenberger, Markus Jiang, Wei Ritterbusch, Florian Lu, Zheng-Tian Yang, Guo-Min |
author_sort |
Bouchet, Marie |
title |
The Antarctic Ice Core Chronology 2023 (AICC2023) chronological framework and associated timescale for the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core |
title_short |
The Antarctic Ice Core Chronology 2023 (AICC2023) chronological framework and associated timescale for the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core |
title_full |
The Antarctic Ice Core Chronology 2023 (AICC2023) chronological framework and associated timescale for the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core |
title_fullStr |
The Antarctic Ice Core Chronology 2023 (AICC2023) chronological framework and associated timescale for the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core |
title_full_unstemmed |
The Antarctic Ice Core Chronology 2023 (AICC2023) chronological framework and associated timescale for the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core |
title_sort |
antarctic ice core chronology 2023 (aicc2023) chronological framework and associated timescale for the european project for ice coring in antarctica (epica) dome c ice core |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/cp-19-2257-2023 https://noa.gwlb.de/receive/cop_mods_00069783 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068154/cp-19-2257-2023.pdf https://cp.copernicus.org/articles/19/2257/2023/cp-19-2257-2023.pdf |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) ENVELOPE(-59.517,-59.517,-62.500,-62.500) |
geographic |
Antarctic The Antarctic East Antarctica Dome Fuji Tac |
geographic_facet |
Antarctic The Antarctic East Antarctica Dome Fuji Tac |
genre |
Antarc* Antarctic Antarctica East Antarctica EPICA ice core |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica EPICA ice core |
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-19-2257-2023 https://noa.gwlb.de/receive/cop_mods_00069783 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068154/cp-19-2257-2023.pdf https://cp.copernicus.org/articles/19/2257/2023/cp-19-2257-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-19-2257-2023 |
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Climate of the Past |
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