Ernst-Georg Beck's paper 180 Years accurate CO2 Gas analysis of Air by Chemical Methods
Thanks to a reader I now have a copy of Ernst-Georg Beck's paper 180 Years accurate CO2 Gas analysis of Air by Chemical Methods (Short version) which argues that the IPCC reliance of Ice Core CO2 figures is wrong - It is only 10 pages long so I urge you to read it yourself and study such figures as:
Fig. 9 Comparing measured temperature in northern hemisphere (land) from 1850 (Jones (171),
Hansen (172), GHCN(170)) with CO2 fluctuation. (5 years difference by averaging corrected)
The temperature maximum around 1940 is not a result of exponential rise of CO2. It´s the
reverse, high temperature around 1940 had induced CO2 maximum.