Fig. 6From: A review of progress towards understanding the transient global mean surface temperature response to radiative perturbationSST changes normalized by the global mean SST changes from the control: a at the time of quadrupled CO2 concentration in the 1pctCO2 experiment (average of 131–150 years); b at equilibrium in the const4xCO2 experiment (average of 3586–3685 years); and c the difference between b and a. The number at the upper right corner of each figure indicates the global mean SST changes from the control in degree CelsiusBack to article page