A 420,000 year deuterium excess record from East Antarctica: Information on past changes in the origin of precipitation at Vostok
International audience Here we present and analyze the complete Vostok ice cores deuterium excess record which spans the last four climatic cycles, back to-420,000 years B.P. To extract paleoclimate information from this record, we use isotopic modeling showing that changes in deuterium excess (d=fD...
Published in: | Journal of Geophysical Research: Atmospheres |
---|---|
Main Authors: | , , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2001
|
Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-03102651 https://hal.archives-ouvertes.fr/hal-03102651/document https://hal.archives-ouvertes.fr/hal-03102651/file/2001JD900076.pdf https://doi.org/10.1029/2001JD900076 |
id |
ftccsdartic:oai:HAL:hal-03102651v1 |
---|---|
record_format |
openpolar |
spelling |
ftccsdartic:oai:HAL:hal-03102651v1 2023-05-15T13:49:23+02:00 A 420,000 year deuterium excess record from East Antarctica: Information on past changes in the origin of precipitation at Vostok Vimeux, F. Masson, V. Delaygue, G. Jouzel, J. Petit, J.R. Stievenard, M. Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-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)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Géochrononologie Traceurs Archéométrie (GEOTRAC) 2001-12-16 https://hal.archives-ouvertes.fr/hal-03102651 https://hal.archives-ouvertes.fr/hal-03102651/document https://hal.archives-ouvertes.fr/hal-03102651/file/2001JD900076.pdf https://doi.org/10.1029/2001JD900076 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2001JD900076 hal-03102651 https://hal.archives-ouvertes.fr/hal-03102651 https://hal.archives-ouvertes.fr/hal-03102651/document https://hal.archives-ouvertes.fr/hal-03102651/file/2001JD900076.pdf doi:10.1029/2001JD900076 info:eu-repo/semantics/OpenAccess ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.archives-ouvertes.fr/hal-03102651 Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2001, 106 (D23), pp.31863-31873. ⟨10.1029/2001JD900076⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2001 ftccsdartic https://doi.org/10.1029/2001JD900076 2021-12-19T00:35:02Z International audience Here we present and analyze the complete Vostok ice cores deuterium excess record which spans the last four climatic cycles, back to-420,000 years B.P. To extract paleoclimate information from this record, we use isotopic modeling showing that changes in deuterium excess (d=fD-86•80) of Vostok precipitation reflect changes in the average temperature of oceanic moisture sources. Over the last 250,000 years the deuterium excess is strongly anticorrelated with changes in Earth's obliquity. This reflects changes in the relative contribution of low and high latitudes to the Vostok precipitation, resulting from changes in the latitudinal annual mean insolation gradient governed by the obliquity. However, this modulation by obliquity is not observed prior to 250,000 years B.P. We attribute this difference to the ice flow, the deeper ice under Vostok station having accumulated in a location upstream Vostok, receiving precipitation from different oceanic origins. Despite this difference between the earlier and the later portions of the record, the deuterium excess changes during all the glacial inceptions are similar in amplitude and timing relative to the deuterium decrease. The glacial inceptions are characterized by high deuterium excess, indicating the significant role of the tropics in supplying moisture to the already cold poles. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) East Antarctica Vostok Station ENVELOPE(106.837,106.837,-78.464,-78.464) Journal of Geophysical Research: Atmospheres 106 D23 31863 31873 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Vimeux, F. Masson, V. Delaygue, G. Jouzel, J. Petit, J.R. Stievenard, M. A 420,000 year deuterium excess record from East Antarctica: Information on past changes in the origin of precipitation at Vostok |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Here we present and analyze the complete Vostok ice cores deuterium excess record which spans the last four climatic cycles, back to-420,000 years B.P. To extract paleoclimate information from this record, we use isotopic modeling showing that changes in deuterium excess (d=fD-86•80) of Vostok precipitation reflect changes in the average temperature of oceanic moisture sources. Over the last 250,000 years the deuterium excess is strongly anticorrelated with changes in Earth's obliquity. This reflects changes in the relative contribution of low and high latitudes to the Vostok precipitation, resulting from changes in the latitudinal annual mean insolation gradient governed by the obliquity. However, this modulation by obliquity is not observed prior to 250,000 years B.P. We attribute this difference to the ice flow, the deeper ice under Vostok station having accumulated in a location upstream Vostok, receiving precipitation from different oceanic origins. Despite this difference between the earlier and the later portions of the record, the deuterium excess changes during all the glacial inceptions are similar in amplitude and timing relative to the deuterium decrease. The glacial inceptions are characterized by high deuterium excess, indicating the significant role of the tropics in supplying moisture to the already cold poles. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-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)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Géochrononologie Traceurs Archéométrie (GEOTRAC) |
format |
Article in Journal/Newspaper |
author |
Vimeux, F. Masson, V. Delaygue, G. Jouzel, J. Petit, J.R. Stievenard, M. |
author_facet |
Vimeux, F. Masson, V. Delaygue, G. Jouzel, J. Petit, J.R. Stievenard, M. |
author_sort |
Vimeux, F. |
title |
A 420,000 year deuterium excess record from East Antarctica: Information on past changes in the origin of precipitation at Vostok |
title_short |
A 420,000 year deuterium excess record from East Antarctica: Information on past changes in the origin of precipitation at Vostok |
title_full |
A 420,000 year deuterium excess record from East Antarctica: Information on past changes in the origin of precipitation at Vostok |
title_fullStr |
A 420,000 year deuterium excess record from East Antarctica: Information on past changes in the origin of precipitation at Vostok |
title_full_unstemmed |
A 420,000 year deuterium excess record from East Antarctica: Information on past changes in the origin of precipitation at Vostok |
title_sort |
420,000 year deuterium excess record from east antarctica: information on past changes in the origin of precipitation at vostok |
publisher |
HAL CCSD |
publishDate |
2001 |
url |
https://hal.archives-ouvertes.fr/hal-03102651 https://hal.archives-ouvertes.fr/hal-03102651/document https://hal.archives-ouvertes.fr/hal-03102651/file/2001JD900076.pdf https://doi.org/10.1029/2001JD900076 |
long_lat |
ENVELOPE(106.837,106.837,-78.464,-78.464) |
geographic |
East Antarctica Vostok Station |
geographic_facet |
East Antarctica Vostok Station |
genre |
Antarc* Antarctica East Antarctica |
genre_facet |
Antarc* Antarctica East Antarctica |
op_source |
ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.archives-ouvertes.fr/hal-03102651 Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2001, 106 (D23), pp.31863-31873. ⟨10.1029/2001JD900076⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2001JD900076 hal-03102651 https://hal.archives-ouvertes.fr/hal-03102651 https://hal.archives-ouvertes.fr/hal-03102651/document https://hal.archives-ouvertes.fr/hal-03102651/file/2001JD900076.pdf doi:10.1029/2001JD900076 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2001JD900076 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
106 |
container_issue |
D23 |
container_start_page |
31863 |
op_container_end_page |
31873 |
_version_ |
1766251288721358848 |