The paper finds a -15.9 W/m2 cooling effect from clouds at the surface, which by way of comparison is more than 11 times greater than the IPCC alleged CO2 increased forcing of 1.68 W/m2 since 1750, as shown by the AR5 chart below. The IPCC also estimates cloud adjustments due to aerosols as only about -0.5 W/m2, which may be greatly underestimated since cloud formation requires the presence of aerosols.
|IPCC AR5 chart showing alleged CO2 forcing increased 1.68 Wm-2 since 1750.|
|Figure from the paper showing the net cooling effect of clouds in black, cooling due to blocking solar radiation shown in blue, and smaller greenhouse gas water vapor longwave IR radiation shown in red. CRE = Cloud Radiative Effect.|