The real Co2 levels in history

This website documents my latest research on the history of carbon dioxide gas analysis. My work had been published by several journals and had been presented at national and international meetings. In literature we can find more than 200 000 directly measured CO2 data since 1800 from which I have estimated the annual CO2 background averages since 1826 to 1960, the end of the measurements by chemical methods. IPCC prefers ice core reconstructions. This new data set reveals remarkable coherence with other geophysical timeseries. Please feel free to check data, methods, stations and historical literature. Comments are welcome.

CO2MBL estimation

Fig. 1 Atmospheric CO2 background level 1826 – 1960. CO2 MBL estimation 1826- 1960 from directly measured data (Beck 2009); black line smoothed by a Savitzky-Golay filter, grey area= estimated error range).Savitzky Golay smoothing parameters : width of the moving window: 5, order: 2; passes: 3.
(> 400 papers, >200 000 raw samples, > 100 000 selected for MBL estimation)

Wavelet Spectral Analysis of CO2 MBL and Temperature

click to enlarge

Interpretation: WTC (wavelet coherence) spectra of the CO2 MBL reconstruction with geophysical time series: 1: temperature northern hemisphere (CRU)-CO2 MBL; 2: temperature Antarctica - CO2 MBL; 3: temperature comnispa (stalagmite) - CO2 MBL; 4: SST NH - CO2 MBL; 5. continuous wavelet spectrum CO2 MLO/ icecore

dark blue areas in cone of interest (COI): no spectral information ; dark red areas black lined: strong coherence (=spectral correlation, see periods on the left vertical scale); arrows: phase angle, horizontal= linear correlation; vertical down= time delay CO2 after temperature

1: coherence around 8-14 years in 1860-90, 1940 and >1980; 2. coherence around 1900 -1960 at >24 years; 3: linear correlation around 1860 -1900 at 8-14 years; 4. very strong coherence around 6-14 years in 1860-1960 and 14-32 around 1916-1970 at 14-32 years (6,2+18,6 years = lunar nodal cycle), CO2 show time delay after SST of 1 year. See also cross correlation below. 5: no spectral information in CO2 from MLO-ice core (IPCC); conclusion: possible data processing or methodical problems.