by Bryce Johnson

Abstract

An atmospheric radiation transport code, SpectralCalc™ (1) has been used to predict carbon dioxide’s contribution to earth heating.  The code predicts that doubling atmospheric CO₂ raises its temperature by only 0.22 degrees C.  This temperature rise is very much lower than “conventional” predictions which indicate at least a 1 C rise for doubling (2). The code shows that increasing CO₂ by a factor of eight would trigger a 0.86 C rise while an increase of 0.72 C would be manifest by only a 30 percent increase in water vapor. Continue reading →