James Annan wrote:
> [EMAIL PROTECTED] wrote:
>> Why is the response to a forcing exactly, or at least to a pretty good
>> approximation, linear (ie if 3.6 W/m2 cause 3 C, then it follows that
>> 1.8 W/m2 will cause 1.5 C and 7.2 W/m2 will cause 6C)? Is there some
>> easy to grasp explanation for that?
>
> That's easy - everything is linear to first order :-)
On reflection I could give a slightly less glib response...we have found
that there is noticeable nonlinearity in at least some of our model
runs, but in the context of the overall uncertainty in sensitivity that
people often bandy about, the odd 20% here or there (say) is relatively
unimportant. Same goes for the sensitivity to different forcings.
James
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