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Northward shift of the southern westerlies during the Antarctic Cold Reversal


Fletcher, M-S and Pedro, J and Hall, T and Mariani, M and Alexander, JA and Beck, K and Blaauw, M and Hodgson, DA and Heijnis, H and Gadd, PS and Lise-Pronovos, A, Northward shift of the southern westerlies during the Antarctic Cold Reversal, Quaternary Science Reviews, 271 Article 107189. ISSN 1873-457X (2021) [Refereed Article]

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DOI: doi:10.1016/j.quascirev.2021.107189


Inter-hemispheric asynchrony of climate change through the last deglaciation has been theoretically linked to latitudinal shifts in the southern westerlies via their influence over CO2 out-gassing from the Southern Ocean. Proxy-based reconstructions disagree on the behaviour of the westerlies through this interval. The last deglaciation was interrupted in the Southern Hemisphere by the Antarctic Cold Reversal (ACR; 14.7 to 13.0 ka BP (thousand years Before Present)), a millennial-scale cooling event that coincided with the Bøllinge-Allerød warm phase in the North Atlantic (BA; 14.7 to 12.7 ka BP). We present terrestrial proxy palaeoclimate data that demonstrate a migration of the westerlies during the last deglaciation. We support the hypothesis that wind-driven out-gassing of old CO2 from the Southern Ocean drove the deglacial rise in atmospheric CO2.

Item Details

Item Type:Refereed Article
Keywords:Antarctic cold reversal, Tasmania, Carbon cycle, Southern ocean, Pollen, Charcoal, Southern hemisphere
Research Division:Earth Sciences
Research Group:Climate change science
Research Field:Climate change processes
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Pedro, J (Dr Joel Pedro)
ID Code:151337
Year Published:2021
Web of Science® Times Cited:1
Deposited By:Institute for Marine & Antarctic Studies
Deposited On:2022-07-27
Last Modified:2022-07-27

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