Michael-Shawn Fletcher
Northward shift of the southern westerlies during the Antarctic Cold Reversal
Fletcher, Michael-Shawn; Pedro, Joel; Hall, Tegan; Mariani, Michela; Joseph, Alexander; Beck, Kristen; Blaauw, Maarten; Hodgson, Dominic; Heijnis, Henk; Gadd, Patricia; Lise-Pronovost, Agathe
Authors
Joel Pedro
Tegan Hall
Dr MICHELA MARIANI MICHELA.MARIANI@NOTTINGHAM.AC.UK
Associate Professor
Alexander Joseph
Kristen Beck
Maarten Blaauw
Dominic Hodgson
Henk Heijnis
Patricia Gadd
Agathe Lise-Pronovost
Abstract
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 Bølling–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.
Citation
Fletcher, M.-S., Pedro, J., Hall, T., Mariani, M., Joseph, A., Beck, K., …Lise-Pronovost, A. (2021). Northward shift of the southern westerlies during the Antarctic Cold Reversal. Quaternary Science Reviews, 271, Article 107189. https://doi.org/10.1016/j.quascirev.2021.107189
Journal Article Type | Article |
---|---|
Acceptance Date | Sep 5, 2021 |
Online Publication Date | Sep 23, 2021 |
Publication Date | Nov 1, 2021 |
Deposit Date | Sep 22, 2021 |
Publicly Available Date | Sep 24, 2022 |
Journal | Quaternary Science Reviews |
Print ISSN | 0277-3791 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 271 |
Article Number | 107189 |
DOI | https://doi.org/10.1016/j.quascirev.2021.107189 |
Keywords | Geology; Archeology; Archeology; Ecology, Evolution, Behavior and Systematics; Global and Planetary Change |
Public URL | https://nottingham-repository.worktribe.com/output/6296098 |
Publisher URL | https://www.sciencedirect.com/science/article/pii/S0277379121003966 |
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