Your question gets to the same issue that I am after: what is the cause of the temperature variations over the last 10 years. If it turns out that clouds are responsible, then that would indeed challenge my feedback estimate.
However, I suggest that ENSO is responsible for the temperature variations. I've repeatedly asked Roy for evidence that clouds are responsible, and he cannot provide anything beyond some ambiguous correlations. The problem with that of course is that correlations do not tell us causality.
If you have evidence that the variations over the last decade are caused by clouds, then please let me know what that evidence is.
Thanks!
posted by Andrew Dessler at 6:35 AM on Jan 14, 2011
"Dessler e-mail to Lindzen on 1/14/11"
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