Fig. 2: Dependence of the net feedback and effective climate sensitivity on the underlying climate.
From: The radiative feedback continuum from Snowball Earth to an ice-free hothouse
a CO2 radiative forcing FGHG. b Top-of-atmosphere (TOA) net energy flux N. c Net radiative response of the climate system, Fnet ≡ N − FGHG. d Net differential feedback parameter \({\lambda }_{net}^{{{{{{\rm{diff}}}}}}}\). e Net effective feedback parameter \({\lambda }_{net}^{{{{{{\rm{eff}}}}}}}\). The blue circle indicates the result from a previous analysis of an instantaneous CO2 quadrupling simulation with the same climate model51. f The effective climate sensitivity EffCS. All quantities are plotted versus the annual-mean global-mean surface temperature T. The dashed lines in d, e indicate a linear dependence of λnet on ΔT that runs through the pre-industrial (PI) climate and either a climate 5K colder (red) or a climate 5K warmer (magenta). In all panels, the vertical dashed line indicates the PI climate.
