Climate of the Past
Climate of the Past
CP
Articles | Volume 17, issue 3
Articles | Volume 17, issue 3
https://doi.org/10.5194/cp-17-1139-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/cp-17-1139-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 17, issue 3
Research article
 | 
07 Jun 2021
Research article |  | 07 Jun 2021

Impact of Southern Ocean surface conditions on deep ocean circulation during the LGM: a model analysis

Fanny Lhardy, Nathaëlle Bouttes, Didier M. Roche, Xavier Crosta, Claire Waelbroeck, and Didier Paillard

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Short summary
Climate models struggle to simulate a LGM ocean circulation in agreement with paleotracer data. Using a set of simulations, we test the impact of boundary conditions and other modelling choices. Model–data comparisons of sea-surface temperatures and sea-ice cover support an overall cold Southern Ocean, with implications on the AMOC strength. Changes in implemented boundary conditions are not sufficient to simulate a shallower AMOC; other mechanisms to better represent convection are required.
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Reconstructing Southern Ocean sea-ice dynamics on glacial-to-historical...