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Northward shift of the southern westerlies during the Antarctic Cold Reversal
journal contribution
posted on 2023-05-21, 09:53 authored by Fletcher, M-S, Joel PedroJoel Pedro, Hall, T, Mariani, M, Alexander, JA, Beck, K, Blaauw, M, Hodgson, DA, Heijnis, H, Gadd, PS, Lise-Pronovos, AInter-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.
History
Publication title
Quaternary Science ReviewsVolume
271Article number
107189Number
107189Pagination
1-7ISSN
1873-457XDepartment/School
Institute for Marine and Antarctic StudiesPublisher
Elsevier LtdPlace of publication
United KingdomRights statement
© 2021 Elsevier Ltd. All rights reserved.Repository Status
- Restricted