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.


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (review by Editor) (20 Jul 2016) by André Paul
AR by Marlene Klockmann on behalf of the Authors (28 Jul 2016)  Author's response    Manuscript
ED: Publish subject to technical corrections (09 Aug 2016) by André Paul
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.