Science 10 August 2007:
Vol. 317 no. 5839 pp. 796-799
DOI: 10.1126/science.1139540
Improved Surface Temperature Prediction for the Coming Decade from a Global Climate Model
Doug M. Smith*,
Stephen Cusack,
Andrew W. Colman,
Chris K. Folland,
Glen R. Harris,
James M. Murphy
Abstract
Previous climate model projections of climate change accounted for external forcing from natural and anthropogenic sources but did not attempt to predict internally generated natural variability. We present a new modeling system that predicts both internal variability and externally forced changes and hence forecasts surface temperature with substantially improved skill throughout a decade, both globally and in many regions. Our system predicts that internal variability will partially offset the anthropogenic global warming signal for the next few years. However, climate will continue to warm, with at least half of the years after 2009 predicted to exceed the warmest year currently on record.
So, a testable prediction. Let's see how they did...
They missed by 0.5 degrees C. At the end of 2014, only two of five will be hotter than the hottest record previous to 2009. Not too shabby, considering they had to factor in a cooling trend in oceans that greatly reduced the rate of heating during that period.
As they predicted, the cooling factors seem to be coming to an end; and the rate of heating will again accelerate as it did this year.