I don’t know if you have seen this new paper in the journal ‘Energy and Environment’ by Ernest-Georg Beck, entitled ‘180 Years of Atmospheric C02 Analysis by Chemical Methods’, now available online here with supporting data.
The absract follows:
“More than 90,000 accurate chemical analyses of CO2 in air since 1812 are summarised. The historic chemical data reveal that changes in CO2 track changes in temperature, and therefore climate in contrast to the simple, monotonically increasing CO2 trend depicted in the post-1990 literature on climate-change. Since 1812, the CO2 concentration in northern hemispheric air has fluctuated exhibiting three high level maxima around 1825, 1857 and 1942 the latter showing more than 400 ppm.
Between 1857 and 1958, the Pettenkofer process was the standard analytical method for determining atmospheric carbon dioxide levels, and usually achieved an accuracy better than 3%. These determinations were made by several scientists of Nobel Prize level distinction. Following Callendar (1938), modern climatologists have generally ignored the historic determinations of CO2, despite the techniques being standard text book procedures in several different disciplines. Chemical methods were discredited as unreliable choosing only few which fit the assumption of a climate CO2 connection. [end of quote]
A note to potential Commentators, I suggest you read the paper before posting a comment below, try and limit comments to 2-3 posts per 24 hour period, and try and stay polite and on-topic. Cheers, Jennifer.