Stratospheric ozone changes from explosive tropical volcanoes: Modeling and ice core constraints
Major tropical volcanic eruptions have emitted large quantities of stratospheric sulphate and are potential sources of stratospheric chlorine although this is less well constrained by observations. This study combines model and ice core analysis to investigate past changes in total column ozone. His...
Published in: | Journal of Geophysical Research: Atmospheres |
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American Geophysical Union
2020
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Online Access: | http://nora.nerc.ac.uk/id/eprint/526385/ https://nora.nerc.ac.uk/id/eprint/526385/1/2019JD032290.pdf https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2019JD032290 |
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ftnerc:oai:nora.nerc.ac.uk:526385 2023-05-15T13:41:44+02:00 Stratospheric ozone changes from explosive tropical volcanoes: Modeling and ice core constraints Ming, Alison Winton, V. Holly L. Keeble, James Abraham, Nathan L. Dalvi, Mohit C. Griffiths, Paul Caillon, Nicolas Jones, Anna E. Mulvaney, Robert Savarino, Joël Frey, Markus M. Yang, Xin 2020-06-16 text http://nora.nerc.ac.uk/id/eprint/526385/ https://nora.nerc.ac.uk/id/eprint/526385/1/2019JD032290.pdf https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2019JD032290 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/526385/1/2019JD032290.pdf Ming, Alison orcid:0000-0001-5786-6188 Winton, V. Holly L. orcid:0000-0001-7112-6768 Keeble, James; Abraham, Nathan L.; Dalvi, Mohit C.; Griffiths, Paul; Caillon, Nicolas; Jones, Anna E. orcid:0000-0002-2040-4841 Mulvaney, Robert orcid:0000-0002-5372-8148 Savarino, Joël; Frey, Markus M. orcid:0000-0003-0535-0416 Yang, Xin orcid:0000-0002-3838-9758 . 2020 Stratospheric ozone changes from explosive tropical volcanoes: Modeling and ice core constraints. Journal of Geophysical Research: Atmospheres, 125 (11), e2019JD032290. 14, pp. https://doi.org/10.1029/2019JD032290 <https://doi.org/10.1029/2019JD032290> cc_by_4 CC-BY Chemistry Publication - Article PeerReviewed 2020 ftnerc https://doi.org/10.1029/2019JD032290 2023-02-04T19:49:55Z Major tropical volcanic eruptions have emitted large quantities of stratospheric sulphate and are potential sources of stratospheric chlorine although this is less well constrained by observations. This study combines model and ice core analysis to investigate past changes in total column ozone. Historic eruptions are good analogues for future eruptions as stratospheric chlorine levels have been decreasing since the year 2000. We perturb the pre‐industrial atmosphere of a chemistry‐climate model with high and low emissions of sulphate and chlorine. The sign of the resulting Antarctic ozone change is highly sensitive to the background stratospheric chlorine loading. In the first year, the response is dynamical, with ozone increases over Antarctica. In the high HCL (2Tg emission) experiment, the injected chlorine is slowly transported to the polar regions with subsequent chemical ozone depletion. These model results are then compared to measurements of the stable nitrogen isotopic ratio, δ 15N(NO3‐), from a low snow accumulation Antarctic ice core from Dronning Maud Land (recovered in 2016‐17). We expect ozone depletion to lead to increased surface ultraviolet (UV) radiation, enhanced air‐snow nitrate photo‐chemistry and enrichment in δ 15N(NO3‐) in the ice core. We focus on the possible ozone depletion event that followed the largest volcanic eruption in the past 1000 years, Samalas in 1257. The characteristic sulphate signal from this volcano is present in the ice‐core but the variability in δ 15N(NO3‐) dominates any signal arising from changes in UV from ozone depletion. Prolonged complete ozone removal following this eruption is unlikely to have occurred over Antarctica. Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land ice core Natural Environment Research Council: NERC Open Research Archive Antarctic Dronning Maud Land Journal of Geophysical Research: Atmospheres 125 11 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Chemistry |
spellingShingle |
Chemistry Ming, Alison Winton, V. Holly L. Keeble, James Abraham, Nathan L. Dalvi, Mohit C. Griffiths, Paul Caillon, Nicolas Jones, Anna E. Mulvaney, Robert Savarino, Joël Frey, Markus M. Yang, Xin Stratospheric ozone changes from explosive tropical volcanoes: Modeling and ice core constraints |
topic_facet |
Chemistry |
description |
Major tropical volcanic eruptions have emitted large quantities of stratospheric sulphate and are potential sources of stratospheric chlorine although this is less well constrained by observations. This study combines model and ice core analysis to investigate past changes in total column ozone. Historic eruptions are good analogues for future eruptions as stratospheric chlorine levels have been decreasing since the year 2000. We perturb the pre‐industrial atmosphere of a chemistry‐climate model with high and low emissions of sulphate and chlorine. The sign of the resulting Antarctic ozone change is highly sensitive to the background stratospheric chlorine loading. In the first year, the response is dynamical, with ozone increases over Antarctica. In the high HCL (2Tg emission) experiment, the injected chlorine is slowly transported to the polar regions with subsequent chemical ozone depletion. These model results are then compared to measurements of the stable nitrogen isotopic ratio, δ 15N(NO3‐), from a low snow accumulation Antarctic ice core from Dronning Maud Land (recovered in 2016‐17). We expect ozone depletion to lead to increased surface ultraviolet (UV) radiation, enhanced air‐snow nitrate photo‐chemistry and enrichment in δ 15N(NO3‐) in the ice core. We focus on the possible ozone depletion event that followed the largest volcanic eruption in the past 1000 years, Samalas in 1257. The characteristic sulphate signal from this volcano is present in the ice‐core but the variability in δ 15N(NO3‐) dominates any signal arising from changes in UV from ozone depletion. Prolonged complete ozone removal following this eruption is unlikely to have occurred over Antarctica. |
format |
Article in Journal/Newspaper |
author |
Ming, Alison Winton, V. Holly L. Keeble, James Abraham, Nathan L. Dalvi, Mohit C. Griffiths, Paul Caillon, Nicolas Jones, Anna E. Mulvaney, Robert Savarino, Joël Frey, Markus M. Yang, Xin |
author_facet |
Ming, Alison Winton, V. Holly L. Keeble, James Abraham, Nathan L. Dalvi, Mohit C. Griffiths, Paul Caillon, Nicolas Jones, Anna E. Mulvaney, Robert Savarino, Joël Frey, Markus M. Yang, Xin |
author_sort |
Ming, Alison |
title |
Stratospheric ozone changes from explosive tropical volcanoes: Modeling and ice core constraints |
title_short |
Stratospheric ozone changes from explosive tropical volcanoes: Modeling and ice core constraints |
title_full |
Stratospheric ozone changes from explosive tropical volcanoes: Modeling and ice core constraints |
title_fullStr |
Stratospheric ozone changes from explosive tropical volcanoes: Modeling and ice core constraints |
title_full_unstemmed |
Stratospheric ozone changes from explosive tropical volcanoes: Modeling and ice core constraints |
title_sort |
stratospheric ozone changes from explosive tropical volcanoes: modeling and ice core constraints |
publisher |
American Geophysical Union |
publishDate |
2020 |
url |
http://nora.nerc.ac.uk/id/eprint/526385/ https://nora.nerc.ac.uk/id/eprint/526385/1/2019JD032290.pdf https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2019JD032290 |
geographic |
Antarctic Dronning Maud Land |
geographic_facet |
Antarctic Dronning Maud Land |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land ice core |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land ice core |
op_relation |
https://nora.nerc.ac.uk/id/eprint/526385/1/2019JD032290.pdf Ming, Alison orcid:0000-0001-5786-6188 Winton, V. Holly L. orcid:0000-0001-7112-6768 Keeble, James; Abraham, Nathan L.; Dalvi, Mohit C.; Griffiths, Paul; Caillon, Nicolas; Jones, Anna E. orcid:0000-0002-2040-4841 Mulvaney, Robert orcid:0000-0002-5372-8148 Savarino, Joël; Frey, Markus M. orcid:0000-0003-0535-0416 Yang, Xin orcid:0000-0002-3838-9758 . 2020 Stratospheric ozone changes from explosive tropical volcanoes: Modeling and ice core constraints. Journal of Geophysical Research: Atmospheres, 125 (11), e2019JD032290. 14, pp. https://doi.org/10.1029/2019JD032290 <https://doi.org/10.1029/2019JD032290> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2019JD032290 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
125 |
container_issue |
11 |
_version_ |
1766156429466533888 |