Articles | Volume 17, issue 3
Clim. Past, 17, 1139–1159, 2021
https://doi.org/10.5194/cp-17-1139-2021

Special issue: Reconstructing Southern Ocean sea-ice dynamics on glacial-to-historical...

Clim. Past, 17, 1139–1159, 2021
https://doi.org/10.5194/cp-17-1139-2021

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 et al.

Data sets

Model outputs for figures in Climate of the Past "Impact of Southern Ocean surface conditions on deep ocean circulation at the LGM: a model analysis" Fanny Lhardy https://doi.org/10.5281/zenodo.4576026

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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.