Ranges of moisture-source temperature estimated from Antarctic ice cores stable isotope records over glacial-interglacial cycles
A single isotope ratio (delta D or delta O-18) of water is widely used as an air-temperature proxy in Antarctic ice core records. These isotope ratios, however, do not solely depend on air-temperature but also on the extent of distillation of heavy isotopes out of atmospheric water vapor from an oce...
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ftarchimer:oai:archimer.ifremer.fr:25062 2023-05-15T13:47:21+02:00 Ranges of moisture-source temperature estimated from Antarctic ice cores stable isotope records over glacial-interglacial cycles Uemura, R. Masson-delmotte, V. Jouzel, J. Landais, A. Motoyama, H. Stenni, B. 2012 application/pdf https://archimer.ifremer.fr/doc/00139/25062/23172.pdf https://archimer.ifremer.fr/doc/00139/25062/65520.pdf https://doi.org/10.5194/cp-8-1109-2012 https://archimer.ifremer.fr/doc/00139/25062/ eng eng Copernicus Gesellschaft Mbh https://archimer.ifremer.fr/doc/00139/25062/23172.pdf https://archimer.ifremer.fr/doc/00139/25062/65520.pdf doi:10.5194/cp-8-1109-2012 https://archimer.ifremer.fr/doc/00139/25062/ Author(s) 2012. CC Attribution 3.0 License. info:eu-repo/semantics/openAccess restricted use CC-BY Climate Of The Past (1814-9324) (Copernicus Gesellschaft Mbh), 2012 , Vol. 8 , N. 3 , P. 1109-1125 text Publication info:eu-repo/semantics/article 2012 ftarchimer https://doi.org/10.5194/cp-8-1109-2012 2021-09-23T20:23:05Z A single isotope ratio (delta D or delta O-18) of water is widely used as an air-temperature proxy in Antarctic ice core records. These isotope ratios, however, do not solely depend on air-temperature but also on the extent of distillation of heavy isotopes out of atmospheric water vapor from an oceanic moisture source to a precipitation site. The temperature changes at the oceanic moisture source (delta T-source) and at the precipitation site (delta T-site) can be retrieved by using deuterium-excess (d) data. A new d record from Dome Fuji, Antarctica spanning the past 360 000 yr is presented and compared with records from Vostok and EPICA Dome C ice cores. In previous studies, to retrieve delta T-source and delta T-site information, different linear regression equations were proposed using theoretical isotope distillation models. A major source of uncertainty lies in the coefficient of regression, beta(site) which is related to the sensitivity of d to delta T-site. We show that different ranges of temperature and selections of isotopic model outputs may increase the value of beta(site) by more than a factor of two. To explore the impacts of this coefficient on reconstructed temperatures, we apply for the first time the exact same methodology to the isotope records from the three Antarctica ice cores. We show that uncertainties in the beta(site) coefficient strongly affect (i) the glacial-interglacial magnitude of delta T-source; (ii) the imprint of obliquity in delta T-source and in the site-source temperature gradient. By contrast, we highlight the robustness of delta T-site reconstruction using water isotopes records. Article in Journal/Newspaper Antarc* Antarctic Antarctica EPICA ice core Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Antarctic Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) Climate of the Past 8 3 1109 1125 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
A single isotope ratio (delta D or delta O-18) of water is widely used as an air-temperature proxy in Antarctic ice core records. These isotope ratios, however, do not solely depend on air-temperature but also on the extent of distillation of heavy isotopes out of atmospheric water vapor from an oceanic moisture source to a precipitation site. The temperature changes at the oceanic moisture source (delta T-source) and at the precipitation site (delta T-site) can be retrieved by using deuterium-excess (d) data. A new d record from Dome Fuji, Antarctica spanning the past 360 000 yr is presented and compared with records from Vostok and EPICA Dome C ice cores. In previous studies, to retrieve delta T-source and delta T-site information, different linear regression equations were proposed using theoretical isotope distillation models. A major source of uncertainty lies in the coefficient of regression, beta(site) which is related to the sensitivity of d to delta T-site. We show that different ranges of temperature and selections of isotopic model outputs may increase the value of beta(site) by more than a factor of two. To explore the impacts of this coefficient on reconstructed temperatures, we apply for the first time the exact same methodology to the isotope records from the three Antarctica ice cores. We show that uncertainties in the beta(site) coefficient strongly affect (i) the glacial-interglacial magnitude of delta T-source; (ii) the imprint of obliquity in delta T-source and in the site-source temperature gradient. By contrast, we highlight the robustness of delta T-site reconstruction using water isotopes records. |
format |
Article in Journal/Newspaper |
author |
Uemura, R. Masson-delmotte, V. Jouzel, J. Landais, A. Motoyama, H. Stenni, B. |
spellingShingle |
Uemura, R. Masson-delmotte, V. Jouzel, J. Landais, A. Motoyama, H. Stenni, B. Ranges of moisture-source temperature estimated from Antarctic ice cores stable isotope records over glacial-interglacial cycles |
author_facet |
Uemura, R. Masson-delmotte, V. Jouzel, J. Landais, A. Motoyama, H. Stenni, B. |
author_sort |
Uemura, R. |
title |
Ranges of moisture-source temperature estimated from Antarctic ice cores stable isotope records over glacial-interglacial cycles |
title_short |
Ranges of moisture-source temperature estimated from Antarctic ice cores stable isotope records over glacial-interglacial cycles |
title_full |
Ranges of moisture-source temperature estimated from Antarctic ice cores stable isotope records over glacial-interglacial cycles |
title_fullStr |
Ranges of moisture-source temperature estimated from Antarctic ice cores stable isotope records over glacial-interglacial cycles |
title_full_unstemmed |
Ranges of moisture-source temperature estimated from Antarctic ice cores stable isotope records over glacial-interglacial cycles |
title_sort |
ranges of moisture-source temperature estimated from antarctic ice cores stable isotope records over glacial-interglacial cycles |
publisher |
Copernicus Gesellschaft Mbh |
publishDate |
2012 |
url |
https://archimer.ifremer.fr/doc/00139/25062/23172.pdf https://archimer.ifremer.fr/doc/00139/25062/65520.pdf https://doi.org/10.5194/cp-8-1109-2012 https://archimer.ifremer.fr/doc/00139/25062/ |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) |
geographic |
Antarctic Dome Fuji |
geographic_facet |
Antarctic Dome Fuji |
genre |
Antarc* Antarctic Antarctica EPICA ice core |
genre_facet |
Antarc* Antarctic Antarctica EPICA ice core |
op_source |
Climate Of The Past (1814-9324) (Copernicus Gesellschaft Mbh), 2012 , Vol. 8 , N. 3 , P. 1109-1125 |
op_relation |
https://archimer.ifremer.fr/doc/00139/25062/23172.pdf https://archimer.ifremer.fr/doc/00139/25062/65520.pdf doi:10.5194/cp-8-1109-2012 https://archimer.ifremer.fr/doc/00139/25062/ |
op_rights |
Author(s) 2012. CC Attribution 3.0 License. info:eu-repo/semantics/openAccess restricted use |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/cp-8-1109-2012 |
container_title |
Climate of the Past |
container_volume |
8 |
container_issue |
3 |
container_start_page |
1109 |
op_container_end_page |
1125 |
_version_ |
1766246966825582592 |