Gas age–ice age differences and the chronology of the Vostok ice core, 0–100 ka
International audience Gas is trapped in polar ice at depths of ∼50–120 m and is therefore significantly younger than the ice in which it is embedded. The age difference is not well constrained for slowly accumulating ice on the East Antarctic Plateau, introducing a significant uncertainty into chro...
Published in: | Journal of Geophysical Research |
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Main Authors: | , , , , , , , , |
Other Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2006
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Subjects: | |
Online Access: | https://insu.hal.science/insu-00375434 https://insu.hal.science/insu-00375434/document https://insu.hal.science/insu-00375434/file/2005JD006488.pdf https://doi.org/10.1029/2005JD006488 |
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ftsorbonneuniv:oai:HAL:insu-00375434v1 |
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Open Polar |
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HAL Sorbonne Université |
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ftsorbonneuniv |
language |
English |
topic |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Bender, M. Floch, G. Chappellaz, Jérôme Suwa, M. Barnola, Jean-Marc Blunier, T. Dreyfus, G. Jouzel, Jean Parrenin, F. Gas age–ice age differences and the chronology of the Vostok ice core, 0–100 ka |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Gas is trapped in polar ice at depths of ∼50–120 m and is therefore significantly younger than the ice in which it is embedded. The age difference is not well constrained for slowly accumulating ice on the East Antarctic Plateau, introducing a significant uncertainty into chronologies of the oldest deep ice cores (Vostok, Dome Fuji, and Dome C). We recorrelate the gas records of Vostok and Greenland Ice Sheet Project 2 (GISP2) cores in part on the basis of new CH4 data and use these records to construct six Vostok chronologies that use different assumptions to calculate gas age–ice age differences. We then evaluate these chronologies by comparing times of climate events at Vostok with correlative events in the well-dated Byrd ice core (West Antarctica). From this evaluation we identify two leading chronologies for the Vostok core that are based on recent models of firn temperature, firn densification, and thinning of upstream ice. One chronology involves calculating gas age–ice age differences from these models. The second, new, approach involves calculating ice depths in the core that are contemporaneous with depths in the same ice core whose gas ages are well constrained. This latter approach circumvents problems associated with highly uncertain accumulation rates in the Vostok core. The uncertainty in Vostok chronologies derived by correlating into the GISP2 gas record remains about ±1 kyr, and high-precision correlations continue to be difficult. |
author2 |
Department of Geosciences Princeton Princeton University Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern = University of Bern = Université de Berne (UNIBE)-Universität Bern = University of Bern = Université de Berne (UNIBE) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) |
format |
Article in Journal/Newspaper |
author |
Bender, M. Floch, G. Chappellaz, Jérôme Suwa, M. Barnola, Jean-Marc Blunier, T. Dreyfus, G. Jouzel, Jean Parrenin, F. |
author_facet |
Bender, M. Floch, G. Chappellaz, Jérôme Suwa, M. Barnola, Jean-Marc Blunier, T. Dreyfus, G. Jouzel, Jean Parrenin, F. |
author_sort |
Bender, M. |
title |
Gas age–ice age differences and the chronology of the Vostok ice core, 0–100 ka |
title_short |
Gas age–ice age differences and the chronology of the Vostok ice core, 0–100 ka |
title_full |
Gas age–ice age differences and the chronology of the Vostok ice core, 0–100 ka |
title_fullStr |
Gas age–ice age differences and the chronology of the Vostok ice core, 0–100 ka |
title_full_unstemmed |
Gas age–ice age differences and the chronology of the Vostok ice core, 0–100 ka |
title_sort |
gas age–ice age differences and the chronology of the vostok ice core, 0–100 ka |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://insu.hal.science/insu-00375434 https://insu.hal.science/insu-00375434/document https://insu.hal.science/insu-00375434/file/2005JD006488.pdf https://doi.org/10.1029/2005JD006488 |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) |
geographic |
Antarctic West Antarctica Greenland Byrd Dome Fuji |
geographic_facet |
Antarctic West Antarctica Greenland Byrd Dome Fuji |
genre |
Antarc* Antarctic Antarctica Greenland Greenland Ice Sheet Project ice core Ice Sheet West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Greenland Greenland Ice Sheet Project ice core Ice Sheet West Antarctica |
op_source |
ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://insu.hal.science/insu-00375434 Journal of Geophysical Research: Atmospheres, 2006, 111 (D21115), 1 à 10 p. ⟨10.1029/2005JD006488⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2005JD006488 insu-00375434 https://insu.hal.science/insu-00375434 https://insu.hal.science/insu-00375434/document https://insu.hal.science/insu-00375434/file/2005JD006488.pdf doi:10.1029/2005JD006488 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2005JD006488 |
container_title |
Journal of Geophysical Research |
container_volume |
111 |
container_issue |
D21 |
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1812176611619897344 |
spelling |
ftsorbonneuniv:oai:HAL:insu-00375434v1 2024-10-06T13:42:41+00:00 Gas age–ice age differences and the chronology of the Vostok ice core, 0–100 ka Bender, M. Floch, G. Chappellaz, Jérôme Suwa, M. Barnola, Jean-Marc Blunier, T. Dreyfus, G. Jouzel, Jean Parrenin, F. Department of Geosciences Princeton Princeton University Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern = University of Bern = Université de Berne (UNIBE)-Universität Bern = University of Bern = Université de Berne (UNIBE) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) 2006 https://insu.hal.science/insu-00375434 https://insu.hal.science/insu-00375434/document https://insu.hal.science/insu-00375434/file/2005JD006488.pdf https://doi.org/10.1029/2005JD006488 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2005JD006488 insu-00375434 https://insu.hal.science/insu-00375434 https://insu.hal.science/insu-00375434/document https://insu.hal.science/insu-00375434/file/2005JD006488.pdf doi:10.1029/2005JD006488 info:eu-repo/semantics/OpenAccess ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://insu.hal.science/insu-00375434 Journal of Geophysical Research: Atmospheres, 2006, 111 (D21115), 1 à 10 p. ⟨10.1029/2005JD006488⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2006 ftsorbonneuniv https://doi.org/10.1029/2005JD006488 2024-09-06T00:03:58Z International audience Gas is trapped in polar ice at depths of ∼50–120 m and is therefore significantly younger than the ice in which it is embedded. The age difference is not well constrained for slowly accumulating ice on the East Antarctic Plateau, introducing a significant uncertainty into chronologies of the oldest deep ice cores (Vostok, Dome Fuji, and Dome C). We recorrelate the gas records of Vostok and Greenland Ice Sheet Project 2 (GISP2) cores in part on the basis of new CH4 data and use these records to construct six Vostok chronologies that use different assumptions to calculate gas age–ice age differences. We then evaluate these chronologies by comparing times of climate events at Vostok with correlative events in the well-dated Byrd ice core (West Antarctica). From this evaluation we identify two leading chronologies for the Vostok core that are based on recent models of firn temperature, firn densification, and thinning of upstream ice. One chronology involves calculating gas age–ice age differences from these models. The second, new, approach involves calculating ice depths in the core that are contemporaneous with depths in the same ice core whose gas ages are well constrained. This latter approach circumvents problems associated with highly uncertain accumulation rates in the Vostok core. The uncertainty in Vostok chronologies derived by correlating into the GISP2 gas record remains about ±1 kyr, and high-precision correlations continue to be difficult. Article in Journal/Newspaper Antarc* Antarctic Antarctica Greenland Greenland Ice Sheet Project ice core Ice Sheet West Antarctica HAL Sorbonne Université Antarctic West Antarctica Greenland Byrd Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) Journal of Geophysical Research 111 D21 |