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

McConnell, Joseph, Burke, Andrea, Dunbar, Nelia, Köhler, Peter, Thomas, Jennie, Arienzo, Monica, Chellman, Nathan, Maselli, Olivia, Sigl, Michael, Adkins, Jess, Baggenstos, Daniel, Burkhart, John, Brook, Edward, Buizert, Christo, Cole-Dai, Jihong, Fudge, T. J., Knorr, Gregor, Graf, Hans-F., Grieman, Mackenzie, Iverson, Nels, McGwire, Kenneth, Mulvaney, Robert, Paris, Guillaume, Rhodes, Rachael, Saltzman, Eric, Severinghaus, Jeffrey, Steffensen, Jørgen, Taylor, Kendrick and Winckler, Gisela (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

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Official URL: http://dx.doi.org/10.1073/pnas.1705595114

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.

Item Type: Article
Uncontrolled Keywords: climate, deglaciation, volcanism, ozone, aerosol
Subjects: F800 Physical and Terrestrial Geographical and Environmental Sciences
Department: Faculties > Engineering and Environment > Geography and Environmental Sciences
Depositing User: Paul Burns
Date Deposited: 17 Jan 2019 10:16
Last Modified: 22 Mar 2019 10:05
URI: http://nrl.northumbria.ac.uk/id/eprint/37617

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