Articles | Volume 12, issue 9
Clim. Past, 12, 1829–1846, 2016
Clim. Past, 12, 1829–1846, 2016

Research article 08 Sep 2016

Research article | 08 Sep 2016

The effect of greenhouse gas concentrations and ice sheets on the glacial AMOC in a coupled climate model

Marlene Klockmann et al.

Data sets

Constraints on the magnitude and patterns of ocean cooling at the Last Glacial Maximum MARGO Project Members

Short summary
We study the response of the glacial AMOC to different forcings in a coupled AOGCM. The depth of the upper overturning cell remains almost unchanged in response to the full glacial forcing. This is the result of two opposing effects: a deepening due to the ice sheets and a shoaling due to the low GHG concentrations. Increased brine release in the Southern Ocean is key to the shoaling. With glacial ice sheets, a shallower cell can be simulated with GHG concentrations below the glacial level.