Articles | Volume 22, issue 6
https://doi.org/10.5194/cp-22-1105-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-22-1105-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
05 Jun 2026
Research article |
| 05 Jun 2026
| 05 Jun 2026
Non-linear climatic response to the weakening of the Atlantic Meridional Overturning Circulation during glacial times
Yanxuan Du
CORRESPONDING AUTHOR
School of Geography, Earth and Atmospheric Sciences, University of Melbourne, Melbourne, Victoria, Australia
Australian Research Council Centre of Excellence for Weather of the 21st Century, University of Melbourne, Melbourne, Victoria, Australia
Josephine R. Brown
School of Geography, Earth and Atmospheric Sciences, University of Melbourne, Melbourne, Victoria, Australia
Australian Research Council Centre of Excellence for Weather of the 21st Century, University of Melbourne, Melbourne, Victoria, Australia
Laurie Menviel
Climate Change Research Centre, University of New South Wales, Sydney, New South Wales, Australia
The Australian Centre for Excellence in Antarctic Science, University of New South Wales, Sydney, New South Wales, Australia
Himadri Saini
School of Geography, Earth and Atmospheric Sciences, University of Melbourne, Melbourne, Victoria, Australia
Australian Research Council Centre of Excellence for Weather of the 21st Century, University of Melbourne, Melbourne, Victoria, Australia
Climate Change Research Centre, University of New South Wales, Sydney, New South Wales, Australia
Russell N. Drysdale
School of Geography, Earth and Atmospheric Sciences, University of Melbourne, Melbourne, Victoria, Australia
David K. Hutchinson
Climate Change Research Centre, University of New South Wales, Sydney, New South Wales, Australia
The Australian Centre for Excellence in Antarctic Science, University of New South Wales, Sydney, New South Wales, Australia
Australian Research Council Centre of Excellence for Weather of the 21st Century, University of New South Wales, Sydney, New South Wales, Australia
Calla N. Gould-Whaley
School of Geography, Earth and Atmospheric Sciences, University of Melbourne, Melbourne, Victoria, Australia
School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, New South Wales, Australia
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Zuorui Liu, Amy Prendergast, Russell Drysdale, and Jan-Hendrik May
E&G Quaternary Sci. J., 71, 227–241, https://doi.org/10.5194/egqsj-71-227-2022, https://doi.org/10.5194/egqsj-71-227-2022, 2022
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Ryan A. Green, Laurie Menviel, Katrin J. Meissner, Xavier Crosta, Deepak Chandan, Gerrit Lohmann, W. Richard Peltier, Xiaoxu Shi, and Jiang Zhu
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Short summary
Short summary
We investigate the effects of a warmer climate from the Earth's paleoclimate (last interglacial) on the marine carbon cycle of the Southern Ocean using a carbon-cycle-enabled state-of-the-art climate model. We find a 150 % increase in CO2 outgassing during this period, which results from competition between higher sea surface temperatures and weaker oceanic circulation. From this we unequivocally infer that the carbon uptake by the Southern Ocean will reduce under a future warming scenario.
Cited articles
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Short summary
This study examines the climate response to different magnitudes of Atlantic Meridional Overturning Circulation (AMOC) weakening under glacial conditions using the Australian Earth System Model. A potential threshold is identified between linear AMOC slowdown and nonlinear shutdown, driven by a critical change in ocean heat loss that induces a nonlinear atmospheric response governed by energetic constraints.
This study examines the climate response to different magnitudes of Atlantic Meridional...
