The Effect of Fossil Fuel and Biogenic CO, on the 13C and 14C Content of Atmospheric Carbon Dioxide

The normalization of a measured delta-14C value of atmospheric CO2 to a delta-13C value of -25 per mil does not take into account the presence of fossil fuel and biogenic CO2. In this paper, we try to assess these contaminations as well as the proper 14C content of "clean air".This material was digitized as part of a cooperative project between Radiocarbon and the University of Arizona Libraries.The Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information.Migrated from OJS platform February 202