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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Copernicus Publications on behalf of the European Geosciences Union
2013
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Online Access: | http://nora.nerc.ac.uk/id/eprint/503416/ https://nora.nerc.ac.uk/id/eprint/503416/1/cp-9-1715-2013.pdf https://doi.org/10.5194/cp-9-1715-2013 |
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ftnerc:oai:nora.nerc.ac.uk:503416 2023-05-15T13:48:08+02:00 An optimized multi-proxy, multi-site Antarctic ice and gas orbital chronology (AICC2012): 120-800 ka Bazin, L. Landais, A. Lemieux-Dudon, B. Toyé Mahamadou Kele, H. Veres, D. Parrenin, F. Martinerie, P. Ritz, C. Capron, E. Lipenkov, V. Loutre, M.-F. Raynaud, D. Vinther, B. Svensson, A. Rasmussen, S. O. Severi, M. Blunier, T. Leuenberger, M. Fischer, H. Masson-Delmotte, V. Chappellaz, J. Wolff, E. 2013-08 text http://nora.nerc.ac.uk/id/eprint/503416/ https://nora.nerc.ac.uk/id/eprint/503416/1/cp-9-1715-2013.pdf https://doi.org/10.5194/cp-9-1715-2013 en eng Copernicus Publications on behalf of the European Geosciences Union https://nora.nerc.ac.uk/id/eprint/503416/1/cp-9-1715-2013.pdf Bazin, L.; Landais, A.; Lemieux-Dudon, B.; Toyé Mahamadou Kele, H.; Veres, D.; Parrenin, F.; Martinerie, P.; Ritz, C.; Capron, E. orcid:0000-0003-0784-1884 Lipenkov, V.; Loutre, M.-F.; Raynaud, D.; Vinther, B.; Svensson, A.; Rasmussen, S. O.; Severi, M.; Blunier, T.; Leuenberger, M.; Fischer, H.; Masson-Delmotte, V.; Chappellaz, J.; Wolff, E. 2013 An optimized multi-proxy, multi-site Antarctic ice and gas orbital chronology (AICC2012): 120-800 ka. Climate of the Past, 9 (4). 1715-1731. https://doi.org/10.5194/cp-9-1715-2013 <https://doi.org/10.5194/cp-9-1715-2013> cc_by CC-BY Publication - Article PeerReviewed 2013 ftnerc https://doi.org/10.5194/cp-9-1715-2013 2023-02-04T19:37:50Z 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 δ18Oatm over Marine Isotope Stage (MIS) 11–12 on EDC and a complete δ18Oatm record of the TALDICE ice cores permit us to derive additional orbital gas age constraints. The coherency of the different orbitally deduced ages (from δ18Oatm, δO2/N2 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 Natural Environment Research Council: NERC Open Research Archive Antarctic Dome F ENVELOPE(39.700,39.700,-77.317,-77.317) Climate of the Past 9 4 1715 1731 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
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 δ18Oatm over Marine Isotope Stage (MIS) 11–12 on EDC and a complete δ18Oatm record of the TALDICE ice cores permit us to derive additional orbital gas age constraints. The coherency of the different orbitally deduced ages (from δ18Oatm, δO2/N2 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 |
Bazin, L. Landais, A. Lemieux-Dudon, B. Toyé Mahamadou Kele, H. Veres, D. Parrenin, F. Martinerie, P. Ritz, C. Capron, E. Lipenkov, V. Loutre, M.-F. Raynaud, D. Vinther, B. Svensson, A. Rasmussen, S. O. Severi, M. Blunier, T. Leuenberger, M. Fischer, H. Masson-Delmotte, V. Chappellaz, J. Wolff, E. |
spellingShingle |
Bazin, L. Landais, A. Lemieux-Dudon, B. Toyé Mahamadou Kele, H. Veres, D. Parrenin, F. Martinerie, P. Ritz, C. Capron, E. Lipenkov, V. Loutre, M.-F. Raynaud, D. Vinther, B. Svensson, A. Rasmussen, S. O. Severi, M. Blunier, T. Leuenberger, M. Fischer, H. Masson-Delmotte, V. Chappellaz, J. Wolff, E. An optimized multi-proxy, multi-site Antarctic ice and gas orbital chronology (AICC2012): 120-800 ka |
author_facet |
Bazin, L. Landais, A. Lemieux-Dudon, B. Toyé Mahamadou Kele, H. Veres, D. Parrenin, F. Martinerie, P. Ritz, C. Capron, E. Lipenkov, V. Loutre, M.-F. Raynaud, D. Vinther, B. Svensson, A. Rasmussen, S. O. Severi, M. Blunier, T. Leuenberger, M. Fischer, H. Masson-Delmotte, V. Chappellaz, J. Wolff, E. |
author_sort |
Bazin, L. |
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 on behalf of the European Geosciences Union |
publishDate |
2013 |
url |
http://nora.nerc.ac.uk/id/eprint/503416/ https://nora.nerc.ac.uk/id/eprint/503416/1/cp-9-1715-2013.pdf https://doi.org/10.5194/cp-9-1715-2013 |
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_relation |
https://nora.nerc.ac.uk/id/eprint/503416/1/cp-9-1715-2013.pdf Bazin, L.; Landais, A.; Lemieux-Dudon, B.; Toyé Mahamadou Kele, H.; Veres, D.; Parrenin, F.; Martinerie, P.; Ritz, C.; Capron, E. orcid:0000-0003-0784-1884 Lipenkov, V.; Loutre, M.-F.; Raynaud, D.; Vinther, B.; Svensson, A.; Rasmussen, S. O.; Severi, M.; Blunier, T.; Leuenberger, M.; Fischer, H.; Masson-Delmotte, V.; Chappellaz, J.; Wolff, E. 2013 An optimized multi-proxy, multi-site Antarctic ice and gas orbital chronology (AICC2012): 120-800 ka. Climate of the Past, 9 (4). 1715-1731. https://doi.org/10.5194/cp-9-1715-2013 <https://doi.org/10.5194/cp-9-1715-2013> |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/cp-9-1715-2013 |
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Climate of the Past |
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