Towards orbital dating of the EPICA Dome C ice core using δO 2 /N 2
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 δO 2 /N 2 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 st...
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ftdoajarticles:oai:doaj.org/article:544e1508db3244289f529f0c2624fdfb 2023-05-15T16:06:17+02:00 Towards orbital dating of the EPICA Dome C ice core using δO 2 /N 2 J. Jouzel L. Arnaud V. Masson-Delmotte D. Paillard D. Raynaud V. Y. Lipenkov M. F. Loutre K. Pol E. Capron G. Dreyfus A. Landais M. Leuenberger 2012-01-01T00:00:00Z https://doi.org/10.5194/cp-8-191-2012 https://doaj.org/article/544e1508db3244289f529f0c2624fdfb EN eng Copernicus Publications http://www.clim-past.net/8/191/2012/cp-8-191-2012.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-8-191-2012 1814-9324 1814-9332 https://doaj.org/article/544e1508db3244289f529f0c2624fdfb Climate of the Past, Vol 8, Iss 1, Pp 191-203 (2012) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2012 ftdoajarticles https://doi.org/10.5194/cp-8-191-2012 2022-12-30T20:46:37Z 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 δO 2 /N 2 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 δO 2 /N 2 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 δO 2 /N 2 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 δO 2 /N 2 and the different insolation curves is ambiguous because some local insolation maxima cannot be identified in the δO 2 /N 2 record (and vice versa). Recognizing these limitations, we restrict the use of our δO 2 /N 2 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 Directory of Open Access Journals: DOAJ Articles Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) Climate of the Past 8 1 191 203 |
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 J. Jouzel L. Arnaud V. Masson-Delmotte D. Paillard D. Raynaud V. Y. Lipenkov M. F. Loutre K. Pol E. Capron G. Dreyfus A. Landais M. Leuenberger Towards orbital dating of the EPICA Dome C ice core using δO 2 /N 2 |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
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 δO 2 /N 2 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 δO 2 /N 2 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 δO 2 /N 2 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 δO 2 /N 2 and the different insolation curves is ambiguous because some local insolation maxima cannot be identified in the δO 2 /N 2 record (and vice versa). Recognizing these limitations, we restrict the use of our δO 2 /N 2 record to show that the EDC3 age scale is generally correct within its published uncertainty (6 kyr) over the 300–800 ka period. |
format |
Article in Journal/Newspaper |
author |
J. Jouzel L. Arnaud V. Masson-Delmotte D. Paillard D. Raynaud V. Y. Lipenkov M. F. Loutre K. Pol E. Capron G. Dreyfus A. Landais M. Leuenberger |
author_facet |
J. Jouzel L. Arnaud V. Masson-Delmotte D. Paillard D. Raynaud V. Y. Lipenkov M. F. Loutre K. Pol E. Capron G. Dreyfus A. Landais M. Leuenberger |
author_sort |
J. Jouzel |
title |
Towards orbital dating of the EPICA Dome C ice core using δO 2 /N 2 |
title_short |
Towards orbital dating of the EPICA Dome C ice core using δO 2 /N 2 |
title_full |
Towards orbital dating of the EPICA Dome C ice core using δO 2 /N 2 |
title_fullStr |
Towards orbital dating of the EPICA Dome C ice core using δO 2 /N 2 |
title_full_unstemmed |
Towards orbital dating of the EPICA Dome C ice core using δO 2 /N 2 |
title_sort |
towards orbital dating of the epica dome c ice core using δo 2 /n 2 |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/cp-8-191-2012 https://doaj.org/article/544e1508db3244289f529f0c2624fdfb |
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, Iss 1, Pp 191-203 (2012) |
op_relation |
http://www.clim-past.net/8/191/2012/cp-8-191-2012.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-8-191-2012 1814-9324 1814-9332 https://doaj.org/article/544e1508db3244289f529f0c2624fdfb |
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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1766402179581607936 |