Observations show IPCC exaggerates anthropogenic global warming by a factor of 7

A compilation of at least 14 studies based upon satellite and ocean observations demonstrate climate sensitivity to a doubling of CO2 levels after all feedbacks is only about 0.4 C, which is 7.5 times less than the 3C claimed by the IPCC.



Note: If the current rate of increase of 2 ppm/yr continues, CO2 concentrations would require about 200 years to double. These climate sensitivity estimates also assume the temperature increase was solely due to greenhouse gases and do not include natural influences from solar amplification, global brightening, ocean oscillations, etc. which can alone account for 95% of climate change over the past 400 years.

Lindzen & Choi [2011]: 0.7 C

Spencer & Braswell: 0.62 C

Bjornbom: 0.67 C

Eschenbach: 0.2 C 

Levitus 2012 = 0.39 C

Douglass & Knox [2012]: 0.16 * 1.3 = 0.21 C



Lindzen & Giannitsis: 0.67 C



Douglass et al [2005]: .22 * 1.3 = 0.29 C

Bogdanov: .41*1.3 = 0.53 C


Chylek: .385*1.3 = 0.50 C

Monckton: .12 * 3.7 * 1.3 = 0.58 C

Paltridge: .1 - .3 (based on NCEP trends, figure 10) (ave .2)*1.3 = 0.26 C

Schwartz: 0.3 * 1.3 = 0.39 C



Bengtsson: 0.54 C

All very similar and averaging out to about 0.4 C climate sensitivity to a doubling of CO2 levels

Note: Equilibrium climate sensitivity [ECS] at the top of the atmosphere [TOA] has been determined from the above analyses assuming ECS is 130% of transient climate sensitivity [TCS] per Otto et al.