East Antarctic ice core sulfur isotope measurements over a complete glacial‐interglacial cycle
International audience Both sulfur and oxygen isotopes of sulfate preserved in ice cores from Greenland and Antarctica have provided information on the relative sources of sulfate in the ice and their chemical transformation pathways in the atmosphere over various time periods. The mass‐independent...
Published in: | Journal of Geophysical Research: Atmospheres |
---|---|
Main Authors: | , , , , , |
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2003
|
Subjects: | |
Online Access: | https://hal.science/hal-04418343 https://doi.org/10.1029/2003jd003513 |
id |
ftccsdartic:oai:HAL:hal-04418343v1 |
---|---|
record_format |
openpolar |
spelling |
ftccsdartic:oai:HAL:hal-04418343v1 2024-02-11T09:57:15+01:00 East Antarctic ice core sulfur isotope measurements over a complete glacial‐interglacial cycle Alexander, B. Thiemens, M. Farquhar, J. Kaufman, A. Savarino, J. Delmas, R. Department of Chemistry, UCSD University of California San Diego (UC San Diego) University of California (UC)-University of California (UC) 2003-12-24 https://hal.science/hal-04418343 https://doi.org/10.1029/2003jd003513 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2003jd003513 hal-04418343 https://hal.science/hal-04418343 doi:10.1029/2003jd003513 ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.science/hal-04418343 Journal of Geophysical Research: Atmospheres, 2003, 108 (D24), ⟨10.1029/2003jd003513⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2003 ftccsdartic https://doi.org/10.1029/2003jd003513 2024-01-27T23:56:49Z International audience Both sulfur and oxygen isotopes of sulfate preserved in ice cores from Greenland and Antarctica have provided information on the relative sources of sulfate in the ice and their chemical transformation pathways in the atmosphere over various time periods. The mass‐independent fractionation in the oxygen isotopes of sulfate from the Vostok ice core from east Antarctica suggests that gas‐phase oxidation by the hydroxyl radical (OH) was relatively greater than aqueous‐phase oxidation by O 3 and H 2 O 2 during the last glacial period than during the Eemian and preindustrial Holocene. The complete sulfur isotopic composition (δ 33 S, δ 34 S, δ 36 S) from the same Vostok ice core samples along with δ 34 S measurements from the Dome C, east Antarctic ice core from this study lend support to these conclusions and reveal significant isotopic fractionation of δ 34 S during chemical transformation and transport to east Antarctica. These findings reveal that conservation of sulfur isotopic signatures upon transport cannot be assumed for the East Antarctic plateau over the time periods considered. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Greenland ice core Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic East Antarctica Greenland Journal of Geophysical Research: Atmospheres 108 D24 |
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 |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Alexander, B. Thiemens, M. Farquhar, J. Kaufman, A. Savarino, J. Delmas, R. East Antarctic ice core sulfur isotope measurements over a complete glacial‐interglacial cycle |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Both sulfur and oxygen isotopes of sulfate preserved in ice cores from Greenland and Antarctica have provided information on the relative sources of sulfate in the ice and their chemical transformation pathways in the atmosphere over various time periods. The mass‐independent fractionation in the oxygen isotopes of sulfate from the Vostok ice core from east Antarctica suggests that gas‐phase oxidation by the hydroxyl radical (OH) was relatively greater than aqueous‐phase oxidation by O 3 and H 2 O 2 during the last glacial period than during the Eemian and preindustrial Holocene. The complete sulfur isotopic composition (δ 33 S, δ 34 S, δ 36 S) from the same Vostok ice core samples along with δ 34 S measurements from the Dome C, east Antarctic ice core from this study lend support to these conclusions and reveal significant isotopic fractionation of δ 34 S during chemical transformation and transport to east Antarctica. These findings reveal that conservation of sulfur isotopic signatures upon transport cannot be assumed for the East Antarctic plateau over the time periods considered. |
author2 |
Department of Chemistry, UCSD University of California San Diego (UC San Diego) University of California (UC)-University of California (UC) |
format |
Article in Journal/Newspaper |
author |
Alexander, B. Thiemens, M. Farquhar, J. Kaufman, A. Savarino, J. Delmas, R. |
author_facet |
Alexander, B. Thiemens, M. Farquhar, J. Kaufman, A. Savarino, J. Delmas, R. |
author_sort |
Alexander, B. |
title |
East Antarctic ice core sulfur isotope measurements over a complete glacial‐interglacial cycle |
title_short |
East Antarctic ice core sulfur isotope measurements over a complete glacial‐interglacial cycle |
title_full |
East Antarctic ice core sulfur isotope measurements over a complete glacial‐interglacial cycle |
title_fullStr |
East Antarctic ice core sulfur isotope measurements over a complete glacial‐interglacial cycle |
title_full_unstemmed |
East Antarctic ice core sulfur isotope measurements over a complete glacial‐interglacial cycle |
title_sort |
east antarctic ice core sulfur isotope measurements over a complete glacial‐interglacial cycle |
publisher |
HAL CCSD |
publishDate |
2003 |
url |
https://hal.science/hal-04418343 https://doi.org/10.1029/2003jd003513 |
geographic |
Antarctic East Antarctica Greenland |
geographic_facet |
Antarctic East Antarctica Greenland |
genre |
Antarc* Antarctic Antarctica East Antarctica Greenland ice core |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Greenland ice core |
op_source |
ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.science/hal-04418343 Journal of Geophysical Research: Atmospheres, 2003, 108 (D24), ⟨10.1029/2003jd003513⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2003jd003513 hal-04418343 https://hal.science/hal-04418343 doi:10.1029/2003jd003513 |
op_doi |
https://doi.org/10.1029/2003jd003513 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
108 |
container_issue |
D24 |
_version_ |
1790609549565100032 |