On 15/04/2008, David B. Benson <[EMAIL PROTECTED]> wrote:
>
> Another way to consider the climate sensitivity to CO2 is to consider
> the change in temperatures
>
> http://tamino.files.wordpress.com/2008/04/t3v.jpg
>
> since the beginning of the Keeling curve data (which I think is 1958
> CE). Both the global temperatures and the atmospheric CO2 are in an
> uptrend and a correlation coeficient could be established. So
> irrespective of any iris effect, the net positive forcing can be
> statistically determined.
>
> I suppose somebody has already done this?
Yes, it's a standard approach, many people have done this (Richard Tol
may have been one of the first, back in 1998 - any bidders for an
older analysis?). However, it is hard to distinguish between a
moderately high sensitivity, and a very high sensitivity, by this sort
of analysis (which he noted, and many others have rediscovered since).
James
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