NASA’s Hansen admits to guesswork about basic climate model inputs

Posted on March 28, 2009

On Mar. 11, Dr. James E. Hansen gave a talk at the Climate Change Congress in Copenhagen. It was titled “Air Pollutant Climate Forcings within the Big Climate Picture” It is available online here [PDF].

As Tom Nelson observes: “The stuff on pages 6-8 of the PDF really has to be seen to be believed. Hansen actually admits [Chart 9] that the IPCC aerosol estimate was “pretty much pulled out of a hat”"

The commentary for Chart 8 is also a rather revealing admission:

“We do not have measurements of aerosols going back to the 1800s – we don’t even have global measurements today. Any measurements that exist incorporate both forcing and feedback. Aerosol effects on clouds are very uncertain”

Posted by John Ray. For a daily critique of Leftist activities, see DISSECTING LEFTISM. For a daily survey of Australian politics, see AUSTRALIAN POLITICS Also, don’t forget your daily roundup of pro-environment but anti-Greenie news and commentary at GREENIE WATCH . Email me (John Ray) here