An optimized multi-proxy, multi-site Antarctic ice and gas orbital chronology (AICC2012): 120–800 ka
An accurate and coherent chronological framework is essential for the interpretation of climatic and environmental records obtained from deep polar ice cores. Until now, one common ice core age scale had been developed based on an inverse dating method (Datice), combining glaciological modelling wit...
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ftdoajarticles:oai:doaj.org/article:da9c55c8dcc344ec9cf31eb74a6889ce 2023-05-15T13:59:54+02:00 An optimized multi-proxy, multi-site Antarctic ice and gas orbital chronology (AICC2012): 120–800 ka L. Bazin A. Landais B. Lemieux-Dudon H. Toyé Mahamadou Kele D. Veres F. Parrenin P. Martinerie C. Ritz E. Capron V. Lipenkov M.-F. Loutre D. Raynaud B. Vinther A. Svensson S. O. Rasmussen M. Severi T. Blunier M. Leuenberger H. Fischer V. Masson-Delmotte J. Chappellaz E. Wolff 2013-08-01T00:00:00Z https://doi.org/10.5194/cp-9-1715-2013 https://doaj.org/article/da9c55c8dcc344ec9cf31eb74a6889ce EN eng Copernicus Publications http://www.clim-past.net/9/1715/2013/cp-9-1715-2013.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-9-1715-2013 1814-9324 1814-9332 https://doaj.org/article/da9c55c8dcc344ec9cf31eb74a6889ce Climate of the Past, Vol 9, Iss 4, Pp 1715-1731 (2013) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2013 ftdoajarticles https://doi.org/10.5194/cp-9-1715-2013 2022-12-31T11:50:50Z An accurate and coherent chronological framework is essential for the interpretation of climatic and environmental records obtained from deep polar ice cores. Until now, one common ice core age scale had been developed based on an inverse dating method (Datice), combining glaciological modelling with absolute and stratigraphic markers between 4 ice cores covering the last 50 ka (thousands of years before present) (Lemieux-Dudon et al., 2010). In this paper, together with the companion paper of Veres et al. (2013), we present an extension of this work back to 800 ka for the NGRIP, TALDICE, EDML, Vostok and EDC ice cores using an improved version of the Datice tool. The AICC2012 (Antarctic Ice Core Chronology 2012) chronology includes numerous new gas and ice stratigraphic links as well as improved evaluation of background and associated variance scenarios. This paper concentrates on the long timescales between 120–800 ka. In this framework, new measurements of δ 18 O atm over Marine Isotope Stage (MIS) 11–12 on EDC and a complete δ 18 O atm record of the TALDICE ice cores permit us to derive additional orbital gas age constraints. The coherency of the different orbitally deduced ages (from δ 18 O atm , δO 2 /N 2 and air content) has been verified before implementation in AICC2012. The new chronology is now independent of other archives and shows only small differences, most of the time within the original uncertainty range calculated by Datice, when compared with the previous ice core reference age scale EDC3, the Dome F chronology, or using a comparison between speleothems and methane. For instance, the largest deviation between AICC2012 and EDC3 (5.4 ka) is obtained around MIS 12. Despite significant modifications of the chronological constraints around MIS 5, now independent of speleothem records in AICC2012, the date of Termination II is very close to the EDC3 one. Article in Journal/Newspaper Antarc* Antarctic ice core NGRIP Directory of Open Access Journals: DOAJ Articles Antarctic Dome F ENVELOPE(39.700,39.700,-77.317,-77.317) Climate of the Past 9 4 1715 1731 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 L. Bazin A. Landais B. Lemieux-Dudon H. Toyé Mahamadou Kele D. Veres F. Parrenin P. Martinerie C. Ritz E. Capron V. Lipenkov M.-F. Loutre D. Raynaud B. Vinther A. Svensson S. O. Rasmussen M. Severi T. Blunier M. Leuenberger H. Fischer V. Masson-Delmotte J. Chappellaz E. Wolff An optimized multi-proxy, multi-site Antarctic ice and gas orbital chronology (AICC2012): 120–800 ka |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
An accurate and coherent chronological framework is essential for the interpretation of climatic and environmental records obtained from deep polar ice cores. Until now, one common ice core age scale had been developed based on an inverse dating method (Datice), combining glaciological modelling with absolute and stratigraphic markers between 4 ice cores covering the last 50 ka (thousands of years before present) (Lemieux-Dudon et al., 2010). In this paper, together with the companion paper of Veres et al. (2013), we present an extension of this work back to 800 ka for the NGRIP, TALDICE, EDML, Vostok and EDC ice cores using an improved version of the Datice tool. The AICC2012 (Antarctic Ice Core Chronology 2012) chronology includes numerous new gas and ice stratigraphic links as well as improved evaluation of background and associated variance scenarios. This paper concentrates on the long timescales between 120–800 ka. In this framework, new measurements of δ 18 O atm over Marine Isotope Stage (MIS) 11–12 on EDC and a complete δ 18 O atm record of the TALDICE ice cores permit us to derive additional orbital gas age constraints. The coherency of the different orbitally deduced ages (from δ 18 O atm , δO 2 /N 2 and air content) has been verified before implementation in AICC2012. The new chronology is now independent of other archives and shows only small differences, most of the time within the original uncertainty range calculated by Datice, when compared with the previous ice core reference age scale EDC3, the Dome F chronology, or using a comparison between speleothems and methane. For instance, the largest deviation between AICC2012 and EDC3 (5.4 ka) is obtained around MIS 12. Despite significant modifications of the chronological constraints around MIS 5, now independent of speleothem records in AICC2012, the date of Termination II is very close to the EDC3 one. |
format |
Article in Journal/Newspaper |
author |
L. Bazin A. Landais B. Lemieux-Dudon H. Toyé Mahamadou Kele D. Veres F. Parrenin P. Martinerie C. Ritz E. Capron V. Lipenkov M.-F. Loutre D. Raynaud B. Vinther A. Svensson S. O. Rasmussen M. Severi T. Blunier M. Leuenberger H. Fischer V. Masson-Delmotte J. Chappellaz E. Wolff |
author_facet |
L. Bazin A. Landais B. Lemieux-Dudon H. Toyé Mahamadou Kele D. Veres F. Parrenin P. Martinerie C. Ritz E. Capron V. Lipenkov M.-F. Loutre D. Raynaud B. Vinther A. Svensson S. O. Rasmussen M. Severi T. Blunier M. Leuenberger H. Fischer V. Masson-Delmotte J. Chappellaz E. Wolff |
author_sort |
L. Bazin |
title |
An optimized multi-proxy, multi-site Antarctic ice and gas orbital chronology (AICC2012): 120–800 ka |
title_short |
An optimized multi-proxy, multi-site Antarctic ice and gas orbital chronology (AICC2012): 120–800 ka |
title_full |
An optimized multi-proxy, multi-site Antarctic ice and gas orbital chronology (AICC2012): 120–800 ka |
title_fullStr |
An optimized multi-proxy, multi-site Antarctic ice and gas orbital chronology (AICC2012): 120–800 ka |
title_full_unstemmed |
An optimized multi-proxy, multi-site Antarctic ice and gas orbital chronology (AICC2012): 120–800 ka |
title_sort |
optimized multi-proxy, multi-site antarctic ice and gas orbital chronology (aicc2012): 120–800 ka |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/cp-9-1715-2013 https://doaj.org/article/da9c55c8dcc344ec9cf31eb74a6889ce |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) |
geographic |
Antarctic Dome F |
geographic_facet |
Antarctic Dome F |
genre |
Antarc* Antarctic ice core NGRIP |
genre_facet |
Antarc* Antarctic ice core NGRIP |
op_source |
Climate of the Past, Vol 9, Iss 4, Pp 1715-1731 (2013) |
op_relation |
http://www.clim-past.net/9/1715/2013/cp-9-1715-2013.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-9-1715-2013 1814-9324 1814-9332 https://doaj.org/article/da9c55c8dcc344ec9cf31eb74a6889ce |
op_doi |
https://doi.org/10.5194/cp-9-1715-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
4 |
container_start_page |
1715 |
op_container_end_page |
1731 |
_version_ |
1766268832630964224 |