The
http://www.scienceagogo.com/forum/ubbthreads.php?ubb=showflat&Number=26438#Post26438 has a graph. My description of how CO2 gas concentration is based on that graph and this one that I had linked to:
If that graph is right, then the extinction graph you are talking about also is logical. The first graph on pAZage 9 of your royal society link shows that CO2 to temperature is not linear. That is a start, but what is the relationship at lower concentrations? As well, those graphs are based on the IPCC scenarios. As you say, they are just theoretical predictions from the models. As we discussed on another thread, those predictions are way too high. The biocab site suggests that the radiative forcing of CO2 is much lower than that. Right now I am not interested in the actual number of degrees per CO2 doubling, but in the relationship between them; otherwise, we will be going in circles again.
