Northward shift of the southern westerlies during the Antarctic Cold Reversal
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 CO 2 out-gassing from the Southern Ocean. Proxy-based reconstructions disagree on the behaviour of the westerlies throu...
Published in: | Quaternary Science Reviews |
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Main Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier Ltd
2021
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Subjects: | |
Online Access: | https://doi.org/10.1016/j.quascirev.2021.107189 http://ecite.utas.edu.au/151337 |
Summary: | 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 CO 2 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 Bllinge-Allerd 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 CO 2 from the Southern Ocean drove the deglacial rise in atmospheric CO 2 . |
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