Ernst-Georg Beck, Reconstruction of Atmospheric CO2 Background Levels since 1826 from Direct Measurements near Ground (inclusive Supplements 3 & 5)
SCC Volume 2.2. A new data set of annually averaged CO2 background levels directly measured from 1826 to 1960 is presented. It is based on a selection process of about 100,000 single samplesfrom more than 200,000 available near ground on…