Articles | Volume 11, issue 12
https://doi.org/10.5194/cp-11-1801-2015
https://doi.org/10.5194/cp-11-1801-2015
Research article
 | 
21 Dec 2015
Research article |  | 21 Dec 2015

On the state dependency of the equilibrium climate sensitivity during the last 5 million years

P. Köhler, B. de Boer, A. S. von der Heydt, L. B. Stap, and R. S. W. van de Wal

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AR: Author's response | RR: Referee report | ED: Editor decision
ED: Reconsider after major revisions (01 Oct 2015) by Uwe Mikolajewicz
AR by Peter Köhler on behalf of the Authors (12 Oct 2015)  Author's response   Manuscript 
ED: Referee Nomination & Report Request started (13 Oct 2015) by Uwe Mikolajewicz
RR by Anonymous Referee #1 (15 Nov 2015)
RR by Jonah Bloch-Johnson (21 Nov 2015)
ED: Publish subject to technical corrections (01 Dec 2015) by Uwe Mikolajewicz
AR by Peter Köhler on behalf of the Authors (01 Dec 2015)  Author's response   Manuscript 
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Short summary
We find that the specific equilibrium climate sensitivity due to radiative forcing of CO2 and land ice albedo has been state-dependent for the last 2.1Myr (most of the Pleistocene). Its value is ~45% larger during intermediate glaciated climates and interglacial periods than during Pleistocene full glacial conditions. The state dependency is mainly caused by a latitudinal dependency in ice sheet area changes. Due to uncertainties in CO2, firm conclusions for the Pliocene are not yet possible.