Dr Lindzen at the 2010 ICCC

Time to Abandon the ‘Skeptic’ Label
M.I.T. professor says ’skepticism’ implies anthropogenic global warming theory a ‘plausible proposition.’

Richard Lindzen, in his presentation at the Heartland Conference, has the best short (100-ish word) summary of the core of many non-believers concerns with catastrophic AGW theory :

Here are two statements that are completely agreed on by the IPCC. It is crucial to be aware of these facts and of their implications.

  1. A doubling of CO2, by itself, contributes only about 1C to greenhouse warming. All models project more warming, because, within models, there are positive feedbacks from water vapor and clouds, and these feedbacks are considered by the IPCC to be uncertain.
  2. If one assumes all warming over the past century is due to anthropogenic greenhouse forcing, then the derived sensitivity of the climate to a doubling of CO2is less than 1C. The higher sensitivity of existing models is made consistent with observed warming by invoking unknown additional negative forcings from aerosols and solar variability as arbitrary adjustments.

http://wattsupwiththat.files.wordpress.com/2010/05/lindzen_heartland_2010.pdf

Global Warming: How to Approach the Science.

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