Fig. 3: The relationship between the precipitation intensity and SST frequency distributions along the CO2 pathway.
From: Irreversible changes in the sea surface temperature threshold for tropical convection to CO2 forcing

a Ensemble mean precipitation intensity as a function of SST and b SST frequency distribution in the present day (black line), ramp-up (red line), and ramp-down (blue line) periods with the observations (purple line). Colored dots indicate the ensemble mean of tropical mean SST while dashed vertical lines indicate SST threshold for convection. The shading of present day (900 years, black) and observation (34 years, purple) indicate the range of maximum and minimum values over each period, while the shading of ramp-up (red) and ramp-down (blue) indicates the range (maximum and minimum) over the entire ensemble.