Synchronous volcanic eruptions and abrupt climate change similar to 17.7 ka plausibly linked by stratospheric ozone depletion

Joseph R. McConnell, Andrea Burke, Nelia W. Dunbar, Peter Koehler, Jennie L. Thomas, Monica M. Arienzo, Nathan J. Chellman, Olivia J. Maselli, Michael Sigl, Jess F. Adkins, Daniel Baggenstos, John F. Burkhart, Edward J. Brook, Christo Buizert, Jihong Cole-Dai, T. J. Fudge, Gregor Knorr, Hans-F. Graf, Mackenzie M. Grieman, Nels IversonKenneth C. McGwire, Robert Mulvaney, Guillaume Paris, Rachael H. Rhodes, Eric S. Saltzman, Jeffrey P. Severinghaus, Jorgen Peder Steffensen, Kendrick C. Taylor, Gisela Winckler

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

Cold and dry glacial-state climate conditions persisted in the Southern Hemisphere until approximately 17.7 ka, when paleoclimate records show a largely unexplained sharp, nearly synchronous acceleration in deglaciation. Detailed measurements in Antarctic ice cores document exactly at that time a unique, ∼192-y series of massive halogen-rich volcanic eruptions geochemically attributed to Mount Takahe in West Antarctica. Rather than a coincidence, we postulate that halogen-catalyzed stratospheric ozone depletion over Antarctica triggered large-scale atmospheric circulation and hydroclimate changes similar to the modern Antarctic ozone hole, explaining the synchronicity and abruptness of accelerated Southern Hemisphere deglaciation.
Original languageEnglish
Pages (from-to)10035-10040
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume114
Issue number38
Early online date5 Sep 2017
DOIs
Publication statusPublished - 19 Sep 2017

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