Towards orbital dating of the EPICA Dome C ice core using δO2/N2
Based on a composite of several measurement series performed on ice samples stored at −25°C or −50°C, we present and discuss the first δO2/N2 record of trapped air from the EPICA Dome C (EDC) ice core covering the period between 300 and 800 ka (thousands of years before present). The samples...
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Online Access: | http://hdl.handle.net/2078.1/106825 https://doi.org/10.5194/cp-8-191-2012 |
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:106825 2024-05-12T08:03:14+00:00 Towards orbital dating of the EPICA Dome C ice core using δO2/N2 Landais, A. Dreyfus, G. Capron, E. Pol, K. Loutre, Marie-France Raynaud, D. Lipenkov, V. Y. Arnaud, L. Masson-Delmotte, V. Paillard, D. Jouzel, J. Leuenberger, M. CEA-CNRS-UVSQ)UMR8212, 91191, Gif-sur-Yvette, France - Institut Pierre-Simon Laplace/Laboratoire des Sciences du Climat et de l'Environnement UCL - SST/ELI/ELIC - Earth & Climate 2012 http://hdl.handle.net/2078.1/106825 https://doi.org/10.5194/cp-8-191-2012 eng eng Copernicus GmbH boreal:106825 http://hdl.handle.net/2078.1/106825 doi:10.5194/cp-8-191-2012 urn:ISSN:1814-9324 urn:EISSN:1814-9332 info:eu-repo/semantics/restrictedAccess Climate of the Past, Vol. 8, p. 191-203 (2012) CECI CISM 1443 info:eu-repo/semantics/article 2012 ftunistlouisbrus https://doi.org/10.5194/cp-8-191-2012 2024-04-18T18:05:59Z Based on a composite of several measurement series performed on ice samples stored at −25°C or −50°C, we present and discuss the first δO2/N2 record of trapped air from the EPICA Dome C (EDC) ice core covering the period between 300 and 800 ka (thousands of years before present). The samples stored at −25°C show clear gas loss affecting the precision and mean level of the δO2/N2 record. Two different gas loss corrections are proposed to account for this effect, without altering the spectral properties of the original datasets. Although processes at play remain to be fully understood, previous studies have proposed a link between surface insolation, ice grain properties at close-off, and δO2/N2 in air bubbles, from which orbitally tuned chronologies of the Vostok and Dome Fuji ice core records have been derived over the last four climatic cycles. Here, we show that limitations caused by data quality and resolution, data filtering, and uncertainties in the orbital tuning target limit the precision of this tuning method for EDC. Moreover, our extended record includes two periods of low eccentricity. During these intervals (around 400 ka and 750 ka), the matching between δO2/N2 and the different insolation curves is ambiguous because some local insolation maxima cannot be identified in the δO2/N2 record (and vice versa). Recognizing these limitations, we restrict the use of our δO2/N2 record to show that the EDC3 age scale is generally correct within its published uncertainty (6 kyr) over the 300-800 ka period Article in Journal/Newspaper EPICA ice core DIAL@USL-B (Université Saint-Louis, Bruxelles) Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) Climate of the Past 8 1 191 203 |
institution |
Open Polar |
collection |
DIAL@USL-B (Université Saint-Louis, Bruxelles) |
op_collection_id |
ftunistlouisbrus |
language |
English |
topic |
CECI CISM 1443 |
spellingShingle |
CECI CISM 1443 Landais, A. Dreyfus, G. Capron, E. Pol, K. Loutre, Marie-France Raynaud, D. Lipenkov, V. Y. Arnaud, L. Masson-Delmotte, V. Paillard, D. Jouzel, J. Leuenberger, M. Towards orbital dating of the EPICA Dome C ice core using δO2/N2 |
topic_facet |
CECI CISM 1443 |
description |
Based on a composite of several measurement series performed on ice samples stored at −25°C or −50°C, we present and discuss the first δO2/N2 record of trapped air from the EPICA Dome C (EDC) ice core covering the period between 300 and 800 ka (thousands of years before present). The samples stored at −25°C show clear gas loss affecting the precision and mean level of the δO2/N2 record. Two different gas loss corrections are proposed to account for this effect, without altering the spectral properties of the original datasets. Although processes at play remain to be fully understood, previous studies have proposed a link between surface insolation, ice grain properties at close-off, and δO2/N2 in air bubbles, from which orbitally tuned chronologies of the Vostok and Dome Fuji ice core records have been derived over the last four climatic cycles. Here, we show that limitations caused by data quality and resolution, data filtering, and uncertainties in the orbital tuning target limit the precision of this tuning method for EDC. Moreover, our extended record includes two periods of low eccentricity. During these intervals (around 400 ka and 750 ka), the matching between δO2/N2 and the different insolation curves is ambiguous because some local insolation maxima cannot be identified in the δO2/N2 record (and vice versa). Recognizing these limitations, we restrict the use of our δO2/N2 record to show that the EDC3 age scale is generally correct within its published uncertainty (6 kyr) over the 300-800 ka period |
author2 |
CEA-CNRS-UVSQ)UMR8212, 91191, Gif-sur-Yvette, France - Institut Pierre-Simon Laplace/Laboratoire des Sciences du Climat et de l'Environnement UCL - SST/ELI/ELIC - Earth & Climate |
format |
Article in Journal/Newspaper |
author |
Landais, A. Dreyfus, G. Capron, E. Pol, K. Loutre, Marie-France Raynaud, D. Lipenkov, V. Y. Arnaud, L. Masson-Delmotte, V. Paillard, D. Jouzel, J. Leuenberger, M. |
author_facet |
Landais, A. Dreyfus, G. Capron, E. Pol, K. Loutre, Marie-France Raynaud, D. Lipenkov, V. Y. Arnaud, L. Masson-Delmotte, V. Paillard, D. Jouzel, J. Leuenberger, M. |
author_sort |
Landais, A. |
title |
Towards orbital dating of the EPICA Dome C ice core using δO2/N2 |
title_short |
Towards orbital dating of the EPICA Dome C ice core using δO2/N2 |
title_full |
Towards orbital dating of the EPICA Dome C ice core using δO2/N2 |
title_fullStr |
Towards orbital dating of the EPICA Dome C ice core using δO2/N2 |
title_full_unstemmed |
Towards orbital dating of the EPICA Dome C ice core using δO2/N2 |
title_sort |
towards orbital dating of the epica dome c ice core using î´o2/n2 |
publisher |
Copernicus GmbH |
publishDate |
2012 |
url |
http://hdl.handle.net/2078.1/106825 https://doi.org/10.5194/cp-8-191-2012 |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) |
geographic |
Dome Fuji |
geographic_facet |
Dome Fuji |
genre |
EPICA ice core |
genre_facet |
EPICA ice core |
op_source |
Climate of the Past, Vol. 8, p. 191-203 (2012) |
op_relation |
boreal:106825 http://hdl.handle.net/2078.1/106825 doi:10.5194/cp-8-191-2012 urn:ISSN:1814-9324 urn:EISSN:1814-9332 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.5194/cp-8-191-2012 |
container_title |
Climate of the Past |
container_volume |
8 |
container_issue |
1 |
container_start_page |
191 |
op_container_end_page |
203 |
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1798845333653946368 |