… -based CO 2 record with novel estimates of Global Mean Temperature. We find that Equilibrium
Climate Sensitivity (ECS) was indeed higher during the warmest intervals of the Eocene, …

… % interval), implying a moderate temperature drop compared to the preceding Eocene.
The … State-dependence of climate sensitivity to the background climate can arise if climate …

… without the need for greenhouse gas concentrations much higher than proxy estimates. The
… climate sensitivity between the Eocene and the present day reflects a state-dependence of …

… We also calculate “climate sensitivity”—how much the Earth … climate sensitivity increases
substantially when greenhouse … model simulations that match the proxy information best from a …

… from proxy records. Particular focus lies on the background … the state dependence of the
climate sensitivity parameter S(t) … [43] conducted Eocene simulations using NCAR CCSM3 …

… substantial evidence exists of increased precipitation at higher latitudes for the early Eocene
… Existing proxy records suggest that the MECO greenhouse warming episode included ~400 …

… -CO 2 greenhouse gasses and slow climate feedbacks, we … of CO 2 —equilibrium climate
sensitivity—to be 3.9 C (1.8–6.7 … sensitivity issues imposed on the alkenone SST proxy at the …

… LI]) or to changes in overall greenhouse-gas levels, land-ice albedo… State dependence of
climate sensitivity may also result from … Finally, given that our approach—which draws on proxy-…

… Together with the more common focal points of climate sensitivity and global emission …
models to accurately project ice-free PA, we compare our proxy-based estimates of PA to …

… simulations of the transition are needed to help interpret proxy … The EOT marks the shift from
the so-called “greenhouse world” … state dependence, with higher sensitivity at higher CO 2 . …