Climate of the Past
Climate of the Past
CP
Articles | Volume 17, issue 2
Articles | Volume 17, issue 2
https://doi.org/10.5194/cp-17-615-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-17-615-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 17, issue 2
Research article
 | 
11 Mar 2021
Research article |  | 11 Mar 2021

Simulated stability of the Atlantic Meridional Overturning Circulation during the Last Glacial Maximum

Frerk Pöppelmeier, Jeemijn Scheen, Aurich Jeltsch-Thömmes, and Thomas F. Stocker

Data sets

Model output from the Bern3D model of pre-industrial and Last Glacial Maximum Frerk Pöppelmeier, Jeemijn Scheen, Aurich Jeltsch-Thömmes, and Thomas F. Stocker https://doi.org/10.5281/zenodo.4436092

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Short summary
The stability of the Atlantic Meridional Overturning Circulation (AMOC) critically depends on its mean state. We simulate the response of the AMOC to North Atlantic freshwater perturbations under different glacial boundary conditions. We find that a closed Bering Strait greatly increases the AMOC's sensitivity to freshwater hosing. Further, the shift from mono- to bistability strongly depends on the chosen boundary conditions, with weaker circulation states exhibiting more abrupt transitions.
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