The Azimuth Project
Climate sensitivity

The climate sensitivity is the increase in temperature that would be caused by doubling the concentration of CO2 in the Earth’s atmosphere. The IPCC currently estimates a range of 2 to 4.5 °C for the overall climate sensitivity. See:

for model estimates and

for observational estimates.

The blog post The IPCC AR5 Is in Real Trouble released by the Cato Institute points to a collection of articles, which also provide estimates and links to the article Sensitive information in the economist, which suggests that future estimates of the IPCC might be eventually lower than previously.


An excellent review article on climate sensitivity is:

Also see:

For nonlinear aspects of climate sensitivity, see:

category: climate