Seasonal variations of 17 O-excess and d-excess in snow precipitation at Vostok station, East Antarctica
International audience The use of water isotopes in polar regions is essential for reconstructing past climate over glacial-interglacial cycles. In addition to δD or δ 18 O, linearly related to condensation temperature, the second-order parameters, d-excess and 17 O-excess, provide important informa...
Published in: | Journal of Glaciology |
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Main Authors: | , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2012
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Online Access: | https://hal.science/hal-03205728 https://hal.science/hal-03205728/document https://hal.science/hal-03205728/file/div-class-title-seasonal-variations-of-span-class-sup-17-span-o-excess-and-d-excess-in-snow-precipitation-at-vostok-station-east-antarctica-div.pdf https://doi.org/10.3189/2012JoG11J237 |
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ftceafr:oai:HAL:hal-03205728v1 |
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Open Polar |
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HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
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ftceafr |
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 Landais, A. Ekaykin, A. Barkan, E. Winkler, R. Luz, B. Seasonal variations of 17 O-excess and d-excess in snow precipitation at Vostok station, East Antarctica |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience The use of water isotopes in polar regions is essential for reconstructing past climate over glacial-interglacial cycles. In addition to δD or δ 18 O, linearly related to condensation temperature, the second-order parameters, d-excess and 17 O-excess, provide important information on the climatic conditions of the source of precipitations. In order to best interpret the glacial-interglacial records of d-excess and 17 O-excess in polar ice cores, it is important to document their present variability, especially in remote and cold regions of East Antarctica. Indeed, the current climatic conditions encountered in these regions provide a good analogy with glacial climatic conditions in a large part of Antarctica. Here we present the first seasonal variations of 17 O-excess and d-excess at Vostok station on an event basis (i.e. samples were collected immediately after each precipitation event) over 1 year. These records show strong correlation between 17 O-excess and δ 18 O over the course of the year, with an amplitude 40 per meg (10 -3 %) in the 17 O-excess seasonal cycle, and strong anticorrelation between d-excess and δ 18 O, with d-excess variations up to 20%. The d-excess and 17 O-excess variations can be explained by the influence of kinetic fractionation at very low temperatures. The comparison with simple isotopic models confirms this explanation, but cannot explain the link between 17 O-excess, d-excess and temperature without (1) a particular relationship between condensation and surface temperature and/or (2) seasonal changes in the climatic conditions of the source regions |
author2 |
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 |
Landais, A. Ekaykin, A. Barkan, E. Winkler, R. Luz, B. |
author_facet |
Landais, A. Ekaykin, A. Barkan, E. Winkler, R. Luz, B. |
author_sort |
Landais, A. |
title |
Seasonal variations of 17 O-excess and d-excess in snow precipitation at Vostok station, East Antarctica |
title_short |
Seasonal variations of 17 O-excess and d-excess in snow precipitation at Vostok station, East Antarctica |
title_full |
Seasonal variations of 17 O-excess and d-excess in snow precipitation at Vostok station, East Antarctica |
title_fullStr |
Seasonal variations of 17 O-excess and d-excess in snow precipitation at Vostok station, East Antarctica |
title_full_unstemmed |
Seasonal variations of 17 O-excess and d-excess in snow precipitation at Vostok station, East Antarctica |
title_sort |
seasonal variations of 17 o-excess and d-excess in snow precipitation at vostok station, east antarctica |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.science/hal-03205728 https://hal.science/hal-03205728/document https://hal.science/hal-03205728/file/div-class-title-seasonal-variations-of-span-class-sup-17-span-o-excess-and-d-excess-in-snow-precipitation-at-vostok-station-east-antarctica-div.pdf https://doi.org/10.3189/2012JoG11J237 |
genre |
Antarc* Antarctica East Antarctica Journal of Glaciology |
genre_facet |
Antarc* Antarctica East Antarctica Journal of Glaciology |
op_source |
ISSN: 0022-1430 EISSN: 1727-5652 Journal of Glaciology https://hal.science/hal-03205728 Journal of Glaciology, 2012, 58 (210), pp.725-733. ⟨10.3189/2012JoG11J237⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3189/2012JoG11J237 hal-03205728 https://hal.science/hal-03205728 https://hal.science/hal-03205728/document https://hal.science/hal-03205728/file/div-class-title-seasonal-variations-of-span-class-sup-17-span-o-excess-and-d-excess-in-snow-precipitation-at-vostok-station-east-antarctica-div.pdf doi:10.3189/2012JoG11J237 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3189/2012JoG11J237 |
container_title |
Journal of Glaciology |
container_volume |
58 |
container_issue |
210 |
container_start_page |
725 |
op_container_end_page |
733 |
_version_ |
1810487332014391296 |
spelling |
ftceafr:oai:HAL:hal-03205728v1 2024-09-15T17:41:12+00:00 Seasonal variations of 17 O-excess and d-excess in snow precipitation at Vostok station, East Antarctica Landais, A. Ekaykin, A. Barkan, E. Winkler, R. Luz, B. 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)) 2012 https://hal.science/hal-03205728 https://hal.science/hal-03205728/document https://hal.science/hal-03205728/file/div-class-title-seasonal-variations-of-span-class-sup-17-span-o-excess-and-d-excess-in-snow-precipitation-at-vostok-station-east-antarctica-div.pdf https://doi.org/10.3189/2012JoG11J237 en eng HAL CCSD International Glaciological Society info:eu-repo/semantics/altIdentifier/doi/10.3189/2012JoG11J237 hal-03205728 https://hal.science/hal-03205728 https://hal.science/hal-03205728/document https://hal.science/hal-03205728/file/div-class-title-seasonal-variations-of-span-class-sup-17-span-o-excess-and-d-excess-in-snow-precipitation-at-vostok-station-east-antarctica-div.pdf doi:10.3189/2012JoG11J237 info:eu-repo/semantics/OpenAccess ISSN: 0022-1430 EISSN: 1727-5652 Journal of Glaciology https://hal.science/hal-03205728 Journal of Glaciology, 2012, 58 (210), pp.725-733. ⟨10.3189/2012JoG11J237⟩ [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 2012 ftceafr https://doi.org/10.3189/2012JoG11J237 2024-07-22T13:15:41Z International audience The use of water isotopes in polar regions is essential for reconstructing past climate over glacial-interglacial cycles. In addition to δD or δ 18 O, linearly related to condensation temperature, the second-order parameters, d-excess and 17 O-excess, provide important information on the climatic conditions of the source of precipitations. In order to best interpret the glacial-interglacial records of d-excess and 17 O-excess in polar ice cores, it is important to document their present variability, especially in remote and cold regions of East Antarctica. Indeed, the current climatic conditions encountered in these regions provide a good analogy with glacial climatic conditions in a large part of Antarctica. Here we present the first seasonal variations of 17 O-excess and d-excess at Vostok station on an event basis (i.e. samples were collected immediately after each precipitation event) over 1 year. These records show strong correlation between 17 O-excess and δ 18 O over the course of the year, with an amplitude 40 per meg (10 -3 %) in the 17 O-excess seasonal cycle, and strong anticorrelation between d-excess and δ 18 O, with d-excess variations up to 20%. The d-excess and 17 O-excess variations can be explained by the influence of kinetic fractionation at very low temperatures. The comparison with simple isotopic models confirms this explanation, but cannot explain the link between 17 O-excess, d-excess and temperature without (1) a particular relationship between condensation and surface temperature and/or (2) seasonal changes in the climatic conditions of the source regions Article in Journal/Newspaper Antarc* Antarctica East Antarctica Journal of Glaciology HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Journal of Glaciology 58 210 725 733 |