Oxygen-17 excesses in products of stratospheric volcanic eruptions and depletion of the ozone layer
Volcanic eruptions inject tens to many hundreds of megatons of SO_2 into the troposphere and stratosphere. The intensity and duration of climate cooling are dependent on the residence time of sulfate aerosols, which in turn are controlled by oxidative pathways of SO_2 by ozone, H_2O_2, or OH radical...
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ftcaltechauth:oai:authors.library.caltech.edu:mnexf-x1077 2024-06-23T07:47:02+00:00 Oxygen-17 excesses in products of stratospheric volcanic eruptions and depletion of the ozone layer Bindeman, I. Eiler, J. Arna-Wojcicki, A. M. 2005-05-15 https://doi.org/10.1016/j.gca.2005.03.030 unknown Elsevier https://doi.org/10.1016/j.gca.2005.03.030 oai:authors.library.caltech.edu:mnexf-x1077 eprintid:39378 resolverid:CaltechAUTHORS:20130716-080115779 info:eu-repo/semantics/closedAccess Other Geochimica et Cosmochimica Acta, 69(10), A448-A448, (2005-05-15) 15th Annual V M Goldschmidt Conference, Moscow, ID, May 2005 info:eu-repo/semantics/article 2005 ftcaltechauth https://doi.org/10.1016/j.gca.2005.03.030 2024-06-12T03:52:28Z Volcanic eruptions inject tens to many hundreds of megatons of SO_2 into the troposphere and stratosphere. The intensity and duration of climate cooling are dependent on the residence time of sulfate aerosols, which in turn are controlled by oxidative pathways of SO_2 by ozone, H_2O_2, or OH radicals. These reactions lead to mass independent fractionations (MIF) of sulfur and oxygen isotopes in sulfate aerosols (Bao et al. 2003 and Savarino et al. 2003a,b), measured in ash leachates and Antarctic ice. Previous studies have not revealed a clear relationship between the sizes of volcanic eruption and magnitude of MIF's in the sulfate deposited by those eruptions. We present results of a survey of stable isotope compositions, including Δ^(17)O, of sulfate associated with 9 explosive eruptions between 2 Ma and the present that cover much of the diversity of sizes and the character of volcanic eruptions. We studied the 0.64Ma, Lava Creek Tuff of Yellowstone in particular detail. We also measured pedogenic sulfate cements in loess, till, soil, and salts that underlie and overly ash layers; we found that they either do not contain sulfate, or contain sulfate with Δ^(17)O <0.2‰. Thus, the observed anomaly in the ash is a property of the volcanogenic sulfate and not of other sulfate. © 2005 Elsevier Ltd. Article in Journal/Newspaper Antarc* Antarctic Caltech Authors (California Institute of Technology) Antarctic Geochimica et Cosmochimica Acta 69 10 401 450 |
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Caltech Authors (California Institute of Technology) |
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description |
Volcanic eruptions inject tens to many hundreds of megatons of SO_2 into the troposphere and stratosphere. The intensity and duration of climate cooling are dependent on the residence time of sulfate aerosols, which in turn are controlled by oxidative pathways of SO_2 by ozone, H_2O_2, or OH radicals. These reactions lead to mass independent fractionations (MIF) of sulfur and oxygen isotopes in sulfate aerosols (Bao et al. 2003 and Savarino et al. 2003a,b), measured in ash leachates and Antarctic ice. Previous studies have not revealed a clear relationship between the sizes of volcanic eruption and magnitude of MIF's in the sulfate deposited by those eruptions. We present results of a survey of stable isotope compositions, including Δ^(17)O, of sulfate associated with 9 explosive eruptions between 2 Ma and the present that cover much of the diversity of sizes and the character of volcanic eruptions. We studied the 0.64Ma, Lava Creek Tuff of Yellowstone in particular detail. We also measured pedogenic sulfate cements in loess, till, soil, and salts that underlie and overly ash layers; we found that they either do not contain sulfate, or contain sulfate with Δ^(17)O <0.2‰. Thus, the observed anomaly in the ash is a property of the volcanogenic sulfate and not of other sulfate. © 2005 Elsevier Ltd. |
format |
Article in Journal/Newspaper |
author |
Bindeman, I. Eiler, J. Arna-Wojcicki, A. M. |
spellingShingle |
Bindeman, I. Eiler, J. Arna-Wojcicki, A. M. Oxygen-17 excesses in products of stratospheric volcanic eruptions and depletion of the ozone layer |
author_facet |
Bindeman, I. Eiler, J. Arna-Wojcicki, A. M. |
author_sort |
Bindeman, I. |
title |
Oxygen-17 excesses in products of stratospheric volcanic eruptions and depletion of the ozone layer |
title_short |
Oxygen-17 excesses in products of stratospheric volcanic eruptions and depletion of the ozone layer |
title_full |
Oxygen-17 excesses in products of stratospheric volcanic eruptions and depletion of the ozone layer |
title_fullStr |
Oxygen-17 excesses in products of stratospheric volcanic eruptions and depletion of the ozone layer |
title_full_unstemmed |
Oxygen-17 excesses in products of stratospheric volcanic eruptions and depletion of the ozone layer |
title_sort |
oxygen-17 excesses in products of stratospheric volcanic eruptions and depletion of the ozone layer |
publisher |
Elsevier |
publishDate |
2005 |
url |
https://doi.org/10.1016/j.gca.2005.03.030 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Geochimica et Cosmochimica Acta, 69(10), A448-A448, (2005-05-15) 15th Annual V M Goldschmidt Conference, Moscow, ID, May 2005 |
op_relation |
https://doi.org/10.1016/j.gca.2005.03.030 oai:authors.library.caltech.edu:mnexf-x1077 eprintid:39378 resolverid:CaltechAUTHORS:20130716-080115779 |
op_rights |
info:eu-repo/semantics/closedAccess Other |
op_doi |
https://doi.org/10.1016/j.gca.2005.03.030 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
69 |
container_issue |
10 |
container_start_page |
401 |
op_container_end_page |
450 |
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1802650246268846080 |