60 percent of Likely Voters Agree “Climate Change Has Become a Religion.” “Climate change has become a religion that ‘actually has nothing to do with the climate’ and is really about power and control.”

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[–]ActuallyNot 3 insightful - 1 fun3 insightful - 0 fun4 insightful - 1 fun -  (0 children)

Natural forcing in that paper is volcanic and solar radiation.

If you're into the maths, then Meehl et al (2004), is more fun. They show that the response to the forcings are approximately additive. (That is the change in temperature due to the sum of two different forcings is about equal to the sum of the change in temperatures due to each forcing). So they work plot the temperature response to each forcing twice. Once driving the model with the forcing, and once (which the call the residual) by subtracting the temperature response of the model using all the forcings from the temperature response of the model using all the other forcings.

Which is not important for understanding climate change, but it's still very fun.

They also decompose the temperature into the response to natural and anthropogenic parts.

The model is a bit more polished. Stott et al (2000) was one of the first papers using output from the Hadley Centre's HadCM3. Meehl et al used the US department of energy model PCM.