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...
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ftcdlib:oai:escholarship.org/ark:/13030/qt01t8m4tv 2023-05-15T13:43:52+02:00 Synchronous volcanic eruptions and abrupt climate change ∼17.7 ka plausibly linked by stratospheric ozone depletion. McConnell, Joseph R Burke, Andrea Dunbar, Nelia W Köhler, Peter Thomas, Jennie L Arienzo, Monica M Chellman, Nathan J Maselli, Olivia J Sigl, Michael Adkins, Jess F Baggenstos, Daniel Burkhart, John F Brook, Edward J Buizert, Christo Cole-Dai, Jihong Fudge, TJ Knorr, Gregor Graf, Hans-F Grieman, Mackenzie M Iverson, Nels McGwire, Kenneth C Mulvaney, Robert Paris, Guillaume Rhodes, Rachael H Saltzman, Eric S Severinghaus, Jeffrey P Steffensen, Jørgen Peder Taylor, Kendrick C Winckler, Gisela 10035 - 10040 2017-09-05 application/pdf https://escholarship.org/uc/item/01t8m4tv unknown eScholarship, University of California qt01t8m4tv https://escholarship.org/uc/item/01t8m4tv public Proceedings of the National Academy of Sciences of the United States of America, vol 114, iss 38 aerosol climate deglaciation ozone volcanism article 2017 ftcdlib 2020-08-18T09:20:27Z 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 University of California: eScholarship 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 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
aerosol climate deglaciation ozone volcanism |
spellingShingle |
aerosol climate deglaciation ozone volcanism McConnell, Joseph R Burke, Andrea Dunbar, Nelia W Köhler, Peter Thomas, Jennie L Arienzo, Monica M Chellman, Nathan J Maselli, Olivia J Sigl, Michael Adkins, Jess F Baggenstos, Daniel Burkhart, John F Brook, Edward J Buizert, Christo Cole-Dai, Jihong Fudge, TJ Knorr, Gregor Graf, Hans-F Grieman, Mackenzie M Iverson, Nels McGwire, Kenneth C Mulvaney, Robert Paris, Guillaume Rhodes, Rachael H Saltzman, Eric S Severinghaus, Jeffrey P Steffensen, Jørgen Peder Taylor, Kendrick C Winckler, Gisela Synchronous volcanic eruptions and abrupt climate change ∼17.7 ka plausibly linked by stratospheric ozone depletion. |
topic_facet |
aerosol climate deglaciation ozone volcanism |
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 Burke, Andrea Dunbar, Nelia W Köhler, Peter Thomas, Jennie L Arienzo, Monica M Chellman, Nathan J Maselli, Olivia J Sigl, Michael Adkins, Jess F Baggenstos, Daniel Burkhart, John F Brook, Edward J Buizert, Christo Cole-Dai, Jihong Fudge, TJ Knorr, Gregor Graf, Hans-F Grieman, Mackenzie M Iverson, Nels McGwire, Kenneth C Mulvaney, Robert Paris, Guillaume Rhodes, Rachael H Saltzman, Eric S Severinghaus, Jeffrey P Steffensen, Jørgen Peder Taylor, Kendrick C Winckler, Gisela |
author_facet |
McConnell, Joseph R Burke, Andrea Dunbar, Nelia W Köhler, Peter Thomas, Jennie L Arienzo, Monica M Chellman, Nathan J Maselli, Olivia J Sigl, Michael Adkins, Jess F Baggenstos, Daniel Burkhart, John F Brook, Edward J Buizert, Christo Cole-Dai, Jihong Fudge, TJ Knorr, Gregor Graf, Hans-F Grieman, Mackenzie M Iverson, Nels McGwire, Kenneth C Mulvaney, Robert Paris, Guillaume Rhodes, Rachael H Saltzman, Eric S Severinghaus, Jeffrey P Steffensen, Jørgen Peder Taylor, Kendrick C Winckler, Gisela |
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 |
eScholarship, University of California |
publishDate |
2017 |
url |
https://escholarship.org/uc/item/01t8m4tv |
op_coverage |
10035 - 10040 |
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_source |
Proceedings of the National Academy of Sciences of the United States of America, vol 114, iss 38 |
op_relation |
qt01t8m4tv https://escholarship.org/uc/item/01t8m4tv |
op_rights |
public |
_version_ |
1766194505401237504 |