Most widely used climate computer model exaggerates global warming by 67%

http://hockeyschtick.blogspot.com/2011/05/most-widely-used-climate-computer-model.html

The abstract, however, contains a remarkable admission that the model exaggerates the global warming from 1850 to 2005 by 0.4°C more than observations. The observed global warming from 1850 to 2005 was only 0.6°C, thus the computer model predicted ~ 67% more global warming than actually occurred. This exaggeration alone could account for all of the claimed "heat trapping" from the increase in man-made carbon dioxide over that same 155 year period. IPCC projections for future global warming based upon this model may be similarly greatly exaggerated.