Articles | Volume 11, issue 12
Clim. Past, 11, 1801–1823, 2015
https://doi.org/10.5194/cp-11-1801-2015
Clim. Past, 11, 1801–1823, 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 et al.

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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.