New MIS 19 EPICA Dome C high resolution deuterium data: hints for a problematic preservation of climate variability at sub-millennial scale in the “oldest ice”
Marine Isotope Stage 19 (MIS 19) is the oldest interglacial period archived in the EPICA Dome C ice core (~780 ky BP) and the closest “orbital analogue” to the Holocene — albeit with a different obliquity amplitude and phase with precession. New detailed deuterium measurements have been conducted wi...
Published in: | Earth and Planetary Science Letters |
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Online Access: | http://hdl.handle.net/11368/2626892 https://doi.org/10.1016/j.epsl.2010.07.030 |
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ftunitriestiris:oai:arts.units.it:11368/2626892 2023-05-15T14:07:49+02:00 New MIS 19 EPICA Dome C high resolution deuterium data: hints for a problematic preservation of climate variability at sub-millennial scale in the “oldest ice” Pol K. Masson Delmotte V. Johnsen S. Bigler M. Cattani O. Durand G. Falourd S. Jouzel J. Minster B. Parrenin F. Ritz C. Steen Larsen H. C. STENNI, BARBARA Pol, K. Masson Delmotte, V. Johnsen, S. Bigler, M. Cattani, O. Durand, G. Falourd, S. Jouzel, J. Minster, B. Parrenin, F. Ritz, C. Steen Larsen, H. C. Stenni, Barbara 2010 http://hdl.handle.net/11368/2626892 https://doi.org/10.1016/j.epsl.2010.07.030 eng eng volume:298 firstpage:95 lastpage:103 journal:EARTH AND PLANETARY SCIENCE LETTERS http://hdl.handle.net/11368/2626892 doi:10.1016/j.epsl.2010.07.030 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-77957285181 water stable isotope ice core Antarctica isotopic diffusion info:eu-repo/semantics/article 2010 ftunitriestiris https://doi.org/10.1016/j.epsl.2010.07.030 2023-04-09T06:11:15Z Marine Isotope Stage 19 (MIS 19) is the oldest interglacial period archived in the EPICA Dome C ice core (~780 ky BP) and the closest “orbital analogue” to the Holocene — albeit with a different obliquity amplitude and phase with precession. New detailed deuterium measurements have been conducted with a depth resolution of 11 cm (corresponding time resolution of ~130 years). They confirm our earlier low resolution profile (55 cm), showing a relatively smooth shape over the MIS 20 to MIS 18 time period with a lack of submillennial climate variability, first thought to be due to this low resolution. The MIS 19 high resolution profile actually reveals a strong isotopic diffusion process leading to a diffusion length of at least ~40 cm erasing sub-millennial climate variability. We suggest that this diffusion is caused by water-veins associated with large ice crystals at temperatures above −10 °C, temperature conditions in which the MIS 19 ice has spent more than 200 ky. This result has implications for the selection of the future “oldest ice” drilling site. Article in Journal/Newspaper Antarc* Antarctica EPICA ice core Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste) Earth and Planetary Science Letters 298 1-2 95 103 |
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Open Polar |
collection |
Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste) |
op_collection_id |
ftunitriestiris |
language |
English |
topic |
water stable isotope ice core Antarctica isotopic diffusion |
spellingShingle |
water stable isotope ice core Antarctica isotopic diffusion Pol K. Masson Delmotte V. Johnsen S. Bigler M. Cattani O. Durand G. Falourd S. Jouzel J. Minster B. Parrenin F. Ritz C. Steen Larsen H. C. STENNI, BARBARA New MIS 19 EPICA Dome C high resolution deuterium data: hints for a problematic preservation of climate variability at sub-millennial scale in the “oldest ice” |
topic_facet |
water stable isotope ice core Antarctica isotopic diffusion |
description |
Marine Isotope Stage 19 (MIS 19) is the oldest interglacial period archived in the EPICA Dome C ice core (~780 ky BP) and the closest “orbital analogue” to the Holocene — albeit with a different obliquity amplitude and phase with precession. New detailed deuterium measurements have been conducted with a depth resolution of 11 cm (corresponding time resolution of ~130 years). They confirm our earlier low resolution profile (55 cm), showing a relatively smooth shape over the MIS 20 to MIS 18 time period with a lack of submillennial climate variability, first thought to be due to this low resolution. The MIS 19 high resolution profile actually reveals a strong isotopic diffusion process leading to a diffusion length of at least ~40 cm erasing sub-millennial climate variability. We suggest that this diffusion is caused by water-veins associated with large ice crystals at temperatures above −10 °C, temperature conditions in which the MIS 19 ice has spent more than 200 ky. This result has implications for the selection of the future “oldest ice” drilling site. |
author2 |
Pol, K. Masson Delmotte, V. Johnsen, S. Bigler, M. Cattani, O. Durand, G. Falourd, S. Jouzel, J. Minster, B. Parrenin, F. Ritz, C. Steen Larsen, H. C. Stenni, Barbara |
format |
Article in Journal/Newspaper |
author |
Pol K. Masson Delmotte V. Johnsen S. Bigler M. Cattani O. Durand G. Falourd S. Jouzel J. Minster B. Parrenin F. Ritz C. Steen Larsen H. C. STENNI, BARBARA |
author_facet |
Pol K. Masson Delmotte V. Johnsen S. Bigler M. Cattani O. Durand G. Falourd S. Jouzel J. Minster B. Parrenin F. Ritz C. Steen Larsen H. C. STENNI, BARBARA |
author_sort |
Pol K. |
title |
New MIS 19 EPICA Dome C high resolution deuterium data: hints for a problematic preservation of climate variability at sub-millennial scale in the “oldest ice” |
title_short |
New MIS 19 EPICA Dome C high resolution deuterium data: hints for a problematic preservation of climate variability at sub-millennial scale in the “oldest ice” |
title_full |
New MIS 19 EPICA Dome C high resolution deuterium data: hints for a problematic preservation of climate variability at sub-millennial scale in the “oldest ice” |
title_fullStr |
New MIS 19 EPICA Dome C high resolution deuterium data: hints for a problematic preservation of climate variability at sub-millennial scale in the “oldest ice” |
title_full_unstemmed |
New MIS 19 EPICA Dome C high resolution deuterium data: hints for a problematic preservation of climate variability at sub-millennial scale in the “oldest ice” |
title_sort |
new mis 19 epica dome c high resolution deuterium data: hints for a problematic preservation of climate variability at sub-millennial scale in the “oldest ice” |
publishDate |
2010 |
url |
http://hdl.handle.net/11368/2626892 https://doi.org/10.1016/j.epsl.2010.07.030 |
genre |
Antarc* Antarctica EPICA ice core |
genre_facet |
Antarc* Antarctica EPICA ice core |
op_relation |
volume:298 firstpage:95 lastpage:103 journal:EARTH AND PLANETARY SCIENCE LETTERS http://hdl.handle.net/11368/2626892 doi:10.1016/j.epsl.2010.07.030 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-77957285181 |
op_doi |
https://doi.org/10.1016/j.epsl.2010.07.030 |
container_title |
Earth and Planetary Science Letters |
container_volume |
298 |
container_issue |
1-2 |
container_start_page |
95 |
op_container_end_page |
103 |
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1766279848446132224 |