Lindzen and Choi produced a paper in 2011 indicating that the sensitivity of the Climate to CO2 was quite low
~1.0, IOW a doubling of CO2 would raise temps 1C and other doubling to raise the temp to 2C current CO2
levels are about 400 parts per million that number would have to go to 1600 PPM to produce the so called catastrophe that algore and the alarmist worry about.
Of course Lindzen and Choi were attacked by the establishment scientist for producing this work.
Now a second paper has been produced that makes the same statement based on observed temperature record.
THe IPCC is currently guessing that the Climate sensitivity is 3.3C for a doubling of CO2. Which now appears to be off by a huge amount. If this paper is correct it is game over for the Climate Crisis.
https://wattsupwiththat.com/2016/05/15/a-new-lower-estimate-of-equilibrium-climate-sensitivity/The key points:
Support for low observational climate sensitivity estimates that use two-zone energy balance models
Meridional heat transport and varying radiative response can strongly affect sensitivity estimates
Sensitivity-altering climate feedbacks are not always additive
A link to the paper:
http://onlinelibrary.wiley.com/doi/10.1002/2015EA000154/epdf
