doubling the concentration of atmospheric co2 from its pre-industrial level, in the absence of other forcings and feedbacks, would likely cause a warming of ~0.3â°c to 1.1â°c
doubling the concentration of atmospheric co2 from its pre-industrial level, in the absence of other forcings and feedbacks, would likely cause a warming of ~0.3â°c to 1.1â°c
climate sensitivity:87
the global temperature increase since the beginning of the industrial period (taken as 1750) is about 0.8 °c (1.4 °f), and the radiative forcing due to co 2 and other long-lived greenhouse gases – mainly methane, nitrous oxide, and chlorofluorocarbons – emitted since that time is about 2.6 w/m2.