Revkin quotes the well-known climate modeller James Annan, who in a recent blog post wrote about this issue of climate sensitivity - that is, how much the planet will warm if CO2 levels double: ‘[T]here have now been several recent papers showing much the same – numerous factors including: the increase in positive forcing (CO2 and the recent work on black carbon), decrease in estimated negative forcing (aerosols), combined with the stubborn refusal of the planet to warm as had been predicted over the last decade, all makes a high climate sensitivity increasingly untenable. A value (slightly) under 2 [degrees Celsius] is certainly looking a whole lot more plausible than anything above 4.5 [degrees].’
http://www.spiked-on...e/article/13325
Edited by stocks, 07 February 2013 - 12:38 PM.