Read here. As we have discussed on numerous occasions, the IPCC/U.S./UK climate models are essentially worthless. This new peer-reviewed study [Anagnostopoulos et al.] confirms that sentiment, and documents that they are even worse than worthless (ie, shitty). Policymakers would be better off reading the Farmer's Almanac for weather/climate prognostications.
"It is claimed that GCMs [global circulation models] provide credible quantitative estimates of future climate change, particularly at continental scales and above. Examining the local performance of the models at 55 points,we found that local projections do not correlate well with observed measurements. Furthermore, we found that the correlation at a large spatial scale, i.e. the contiguous USA, is worse than at the local scale.....Simply put, the current suite of climate models were not developed to provide the level of accuracy required for adaptation-type analysis." [Anagnostopoulos, G. G., Koutsoyiannis, D., Christofides, A., Efstratiadis, A. & Mamassis, N. (2010)]
An extra bonus from this study is its verifying that all 'C3' readers and skeptics, in general, are smarter than the vast majority of Yale elites.