Ive seen tree ring C13/C12 data and there is increedible amount of "smear" that evades the technique for detection. They use laser ablation to cut the rings and the ratios bothered me. CO2 has been as high as 5000ppm in several geological ages . The Permian was as great as 6500ppm. and we are concerned about these 360ppm numbers. As far as we know CO2 has been rising in recent cores (since the time around the "little Ice Age" and the climate has been fluctuating.
THERE are a couple of cycles that , to my critical eyes that have NOT been factored in
1Typical Ocean turnover (about an 800yr cycle)
2 Dansgaard Escher Cycle (about a 1500 year cycle)
3The 28 year short cycle of susnspot activity -The susnpot activity seems to me to be more ion the money than is any CO2 data.
I love what John Christie (Queensland U)
has said about CO2. "Why would anyone think that CO2 levels
influence climate, It never has before"
I understand that the Chief Scientist at HAdley Center has resigned and so has the head of IPCC. and a new director of IPCC has been installed. I think his first activity should be to return the organization to some sense of scientific credibility before they argue the POV about CO2
Ive been a critic ever since the time everyone had claimed that this was "settled science". Whenever I hear that statement I always think about the similar statement "Its not about the money"