(Watts Up With That?) Unnoticed, the IPCC has slashed its global-warming predictions, implicitly rejecting the models on which it once so heavily and imprudently relied. In the second draft of the Fifth Assessment Report it had broadly agreed with the models that the world will warm by 0.4 to 1.0 Cº from 2016-2035 against 1986-2005. But in the final draft it quietly cut the 30-year projection to 0.3-0.7 Cº, saying the warming is more likely to be at the lower end of the range [equivalent to about 0.4 Cº over 30 years]. If that rate continued till 2100, global warming this century could be as little as 1.3 Cº.
Official projections of global warming have plummeted since Dr. James Hansen of the Goddard Institute for Space Studies told the U.S. Congress in June 1988 the world would warm by 1 Cº every 20 years till 2050 (Fig. 1), implying 6 Cº to 2100.