Synchronous volcanic eruptions and abrupt climate change ∼17.7 ka plausibly linked by stratospheric ozone depletion
Glacial-state greenhouse gas concentrations and Southern Hemisphere climate conditions persisted until ∼17.7 ka, when a nearly synchronous acceleration in deglaciation was recorded in paleoclimate proxies in large parts of the Southern Hemisphere, with many changes ascribed to a sudden poleward shif...
Published in: | Proceedings of the National Academy of Sciences |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
National Academy of Sciences
2017
|
Subjects: | |
Online Access: | https://authors.library.caltech.edu/81286/ https://authors.library.caltech.edu/81286/4/PNAS-2017-McConnell-10035-40.pdf https://authors.library.caltech.edu/81286/2/pnas.1705595114.sapp.pdf https://authors.library.caltech.edu/81286/3/pnas.1705595114.sd01.xlsx https://resolver.caltech.edu/CaltechAUTHORS:20170911-100036004 |
id |
ftcaltechauth:oai:authors.library.caltech.edu:81286 |
---|---|
record_format |
openpolar |
spelling |
ftcaltechauth:oai:authors.library.caltech.edu:81286 2023-05-15T13:52:02+02:00 Synchronous volcanic eruptions and abrupt climate change ∼17.7 ka plausibly linked by stratospheric ozone depletion McConnell, Joseph R. Adkins, Jess F. Paris, Guillaume 2017-09-19 application/pdf application/vnd.ms-excel https://authors.library.caltech.edu/81286/ https://authors.library.caltech.edu/81286/4/PNAS-2017-McConnell-10035-40.pdf https://authors.library.caltech.edu/81286/2/pnas.1705595114.sapp.pdf https://authors.library.caltech.edu/81286/3/pnas.1705595114.sd01.xlsx https://resolver.caltech.edu/CaltechAUTHORS:20170911-100036004 en eng National Academy of Sciences https://authors.library.caltech.edu/81286/4/PNAS-2017-McConnell-10035-40.pdf https://authors.library.caltech.edu/81286/2/pnas.1705595114.sapp.pdf https://authors.library.caltech.edu/81286/3/pnas.1705595114.sd01.xlsx McConnell, Joseph R. and Adkins, Jess F. and Paris, Guillaume (2017) Synchronous volcanic eruptions and abrupt climate change ∼17.7 ka plausibly linked by stratospheric ozone depletion. Proceedings of the National Academy of Sciences of the United States of America, 114 (38). pp. 10035-10040. ISSN 0027-8424. PMCID PMC5617275. doi:10.1073/pnas.1705595114. https://resolver.caltech.edu/CaltechAUTHORS:20170911-100036004 <https://resolver.caltech.edu/CaltechAUTHORS:20170911-100036004> cc_by_nc_nd CC-BY-NC-ND Article PeerReviewed 2017 ftcaltechauth https://doi.org/10.1073/pnas.1705595114 2022-03-24T18:47:41Z Glacial-state greenhouse gas concentrations and Southern Hemisphere climate conditions persisted until ∼17.7 ka, when a nearly synchronous acceleration in deglaciation was recorded in paleoclimate proxies in large parts of the Southern Hemisphere, with many changes ascribed to a sudden poleward shift in the Southern Hemisphere westerlies and subsequent climate impacts. We used high-resolution chemical measurements in the West Antarctic Ice Sheet Divide, Byrd, and other ice cores to document a unique, ∼192-y series of halogen-rich volcanic eruptions exactly at the start of accelerated deglaciation, with tephra identifying the nearby Mount Takahe volcano as the source. Extensive fallout from these massive eruptions has been found >2,800 km from Mount Takahe. Sulfur isotope anomalies and marked decreases in ice core bromine consistent with increased surface UV radiation indicate that the eruptions led to stratospheric ozone depletion. Rather than a highly improbable coincidence, circulation and climate changes extending from the Antarctic Peninsula to the subtropics—similar to those associated with modern stratospheric ozone depletion over Antarctica—plausibly link the Mount Takahe eruptions to the onset of accelerated Southern Hemisphere deglaciation ∼17.7 ka. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica ice core Ice Sheet Caltech Authors (California Institute of Technology) Antarctic Antarctic Peninsula Byrd Mount Takahe ENVELOPE(166.800,166.800,-77.217,-77.217) Takahe ENVELOPE(-112.233,-112.233,-76.267,-76.267) The Antarctic West Antarctic Ice Sheet Proceedings of the National Academy of Sciences 114 38 10035 10040 |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
English |
description |
Glacial-state greenhouse gas concentrations and Southern Hemisphere climate conditions persisted until ∼17.7 ka, when a nearly synchronous acceleration in deglaciation was recorded in paleoclimate proxies in large parts of the Southern Hemisphere, with many changes ascribed to a sudden poleward shift in the Southern Hemisphere westerlies and subsequent climate impacts. We used high-resolution chemical measurements in the West Antarctic Ice Sheet Divide, Byrd, and other ice cores to document a unique, ∼192-y series of halogen-rich volcanic eruptions exactly at the start of accelerated deglaciation, with tephra identifying the nearby Mount Takahe volcano as the source. Extensive fallout from these massive eruptions has been found >2,800 km from Mount Takahe. Sulfur isotope anomalies and marked decreases in ice core bromine consistent with increased surface UV radiation indicate that the eruptions led to stratospheric ozone depletion. Rather than a highly improbable coincidence, circulation and climate changes extending from the Antarctic Peninsula to the subtropics—similar to those associated with modern stratospheric ozone depletion over Antarctica—plausibly link the Mount Takahe eruptions to the onset of accelerated Southern Hemisphere deglaciation ∼17.7 ka. |
format |
Article in Journal/Newspaper |
author |
McConnell, Joseph R. Adkins, Jess F. Paris, Guillaume |
spellingShingle |
McConnell, Joseph R. Adkins, Jess F. Paris, Guillaume Synchronous volcanic eruptions and abrupt climate change ∼17.7 ka plausibly linked by stratospheric ozone depletion |
author_facet |
McConnell, Joseph R. Adkins, Jess F. Paris, Guillaume |
author_sort |
McConnell, Joseph R. |
title |
Synchronous volcanic eruptions and abrupt climate change ∼17.7 ka plausibly linked by stratospheric ozone depletion |
title_short |
Synchronous volcanic eruptions and abrupt climate change ∼17.7 ka plausibly linked by stratospheric ozone depletion |
title_full |
Synchronous volcanic eruptions and abrupt climate change ∼17.7 ka plausibly linked by stratospheric ozone depletion |
title_fullStr |
Synchronous volcanic eruptions and abrupt climate change ∼17.7 ka plausibly linked by stratospheric ozone depletion |
title_full_unstemmed |
Synchronous volcanic eruptions and abrupt climate change ∼17.7 ka plausibly linked by stratospheric ozone depletion |
title_sort |
synchronous volcanic eruptions and abrupt climate change ∼17.7 ka plausibly linked by stratospheric ozone depletion |
publisher |
National Academy of Sciences |
publishDate |
2017 |
url |
https://authors.library.caltech.edu/81286/ https://authors.library.caltech.edu/81286/4/PNAS-2017-McConnell-10035-40.pdf https://authors.library.caltech.edu/81286/2/pnas.1705595114.sapp.pdf https://authors.library.caltech.edu/81286/3/pnas.1705595114.sd01.xlsx https://resolver.caltech.edu/CaltechAUTHORS:20170911-100036004 |
long_lat |
ENVELOPE(166.800,166.800,-77.217,-77.217) ENVELOPE(-112.233,-112.233,-76.267,-76.267) |
geographic |
Antarctic Antarctic Peninsula Byrd Mount Takahe Takahe The Antarctic West Antarctic Ice Sheet |
geographic_facet |
Antarctic Antarctic Peninsula Byrd Mount Takahe Takahe The Antarctic West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica ice core Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica ice core Ice Sheet |
op_relation |
https://authors.library.caltech.edu/81286/4/PNAS-2017-McConnell-10035-40.pdf https://authors.library.caltech.edu/81286/2/pnas.1705595114.sapp.pdf https://authors.library.caltech.edu/81286/3/pnas.1705595114.sd01.xlsx McConnell, Joseph R. and Adkins, Jess F. and Paris, Guillaume (2017) Synchronous volcanic eruptions and abrupt climate change ∼17.7 ka plausibly linked by stratospheric ozone depletion. Proceedings of the National Academy of Sciences of the United States of America, 114 (38). pp. 10035-10040. ISSN 0027-8424. PMCID PMC5617275. doi:10.1073/pnas.1705595114. https://resolver.caltech.edu/CaltechAUTHORS:20170911-100036004 <https://resolver.caltech.edu/CaltechAUTHORS:20170911-100036004> |
op_rights |
cc_by_nc_nd |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1073/pnas.1705595114 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
114 |
container_issue |
38 |
container_start_page |
10035 |
op_container_end_page |
10040 |
_version_ |
1766256226456305664 |