Evidence from sulfate mass independent oxygen isotopic compositions of dramatic changes in atmospheric oxidation following massive volcanic eruptions
International audience Oxygen isotopic ratio measurements (δ 17 O and δ 18 O) of background and volcanic sulfate preserved in South Pole snow and ice were used to investigate the impact on the oxidation state of the atmosphere by explosive volcanic eruptions. By comparing different paleovolcanic eve...
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ftccsdartic:oai:HAL:hal-04418344v1 2024-02-11T10:08:41+01:00 Evidence from sulfate mass independent oxygen isotopic compositions of dramatic changes in atmospheric oxidation following massive volcanic eruptions Savarino, Joël Bekki, Slimane Cole-Dai, Jihong Thiemens, Mark UCSD 2003-11-07 https://hal.science/hal-04418344 https://doi.org/10.1029/2003jd003737 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2003jd003737 hal-04418344 https://hal.science/hal-04418344 doi:10.1029/2003jd003737 ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.science/hal-04418344 Journal of Geophysical Research: Atmospheres, 2003, 108 (D21), ⟨10.1029/2003jd003737⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2003 ftccsdartic https://doi.org/10.1029/2003jd003737 2024-01-27T23:56:49Z International audience Oxygen isotopic ratio measurements (δ 17 O and δ 18 O) of background and volcanic sulfate preserved in South Pole snow and ice were used to investigate the impact on the oxidation state of the atmosphere by explosive volcanic eruptions. By comparing different paleovolcanic events, we observe a difference in the SO 2 oxidation pathway between moderate (tens of teragrams (Tg) of SO 2 ) and massive (hundreds of Tg) eruptions. Both isotopic data and numerical simulations suggest the shutdown of stratospheric OH chemistry and the opening of unaccounted oxidation channels for SO 2 , such as the reaction with O( 3 P) atoms when hundreds of Tg of SO 2 are injected into the stratosphere. It is very likely that oxidation rates and pathways and concentrations of most traces gases are also dramatically affected, with potentially important implications for climate forcing. Article in Journal/Newspaper South pole Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) South Pole Journal of Geophysical Research: Atmospheres 108 D21 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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English |
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[SDE]Environmental Sciences |
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[SDE]Environmental Sciences Savarino, Joël Bekki, Slimane Cole-Dai, Jihong Thiemens, Mark Evidence from sulfate mass independent oxygen isotopic compositions of dramatic changes in atmospheric oxidation following massive volcanic eruptions |
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[SDE]Environmental Sciences |
description |
International audience Oxygen isotopic ratio measurements (δ 17 O and δ 18 O) of background and volcanic sulfate preserved in South Pole snow and ice were used to investigate the impact on the oxidation state of the atmosphere by explosive volcanic eruptions. By comparing different paleovolcanic events, we observe a difference in the SO 2 oxidation pathway between moderate (tens of teragrams (Tg) of SO 2 ) and massive (hundreds of Tg) eruptions. Both isotopic data and numerical simulations suggest the shutdown of stratospheric OH chemistry and the opening of unaccounted oxidation channels for SO 2 , such as the reaction with O( 3 P) atoms when hundreds of Tg of SO 2 are injected into the stratosphere. It is very likely that oxidation rates and pathways and concentrations of most traces gases are also dramatically affected, with potentially important implications for climate forcing. |
author2 |
UCSD |
format |
Article in Journal/Newspaper |
author |
Savarino, Joël Bekki, Slimane Cole-Dai, Jihong Thiemens, Mark |
author_facet |
Savarino, Joël Bekki, Slimane Cole-Dai, Jihong Thiemens, Mark |
author_sort |
Savarino, Joël |
title |
Evidence from sulfate mass independent oxygen isotopic compositions of dramatic changes in atmospheric oxidation following massive volcanic eruptions |
title_short |
Evidence from sulfate mass independent oxygen isotopic compositions of dramatic changes in atmospheric oxidation following massive volcanic eruptions |
title_full |
Evidence from sulfate mass independent oxygen isotopic compositions of dramatic changes in atmospheric oxidation following massive volcanic eruptions |
title_fullStr |
Evidence from sulfate mass independent oxygen isotopic compositions of dramatic changes in atmospheric oxidation following massive volcanic eruptions |
title_full_unstemmed |
Evidence from sulfate mass independent oxygen isotopic compositions of dramatic changes in atmospheric oxidation following massive volcanic eruptions |
title_sort |
evidence from sulfate mass independent oxygen isotopic compositions of dramatic changes in atmospheric oxidation following massive volcanic eruptions |
publisher |
HAL CCSD |
publishDate |
2003 |
url |
https://hal.science/hal-04418344 https://doi.org/10.1029/2003jd003737 |
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South Pole |
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South Pole |
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South pole |
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South pole |
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ISSN: 2169-897X EISSN: 2169-8996 Journal of Geophysical Research: Atmospheres https://hal.science/hal-04418344 Journal of Geophysical Research: Atmospheres, 2003, 108 (D21), ⟨10.1029/2003jd003737⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2003jd003737 hal-04418344 https://hal.science/hal-04418344 doi:10.1029/2003jd003737 |
op_doi |
https://doi.org/10.1029/2003jd003737 |
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Journal of Geophysical Research: Atmospheres |
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108 |
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D21 |
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1790608228720050176 |