

The Effect of Fossil Fuel and Biogenic CO, on the 13C and 14C Content of Atmospheric Carbon Dioxide
Abstract
The normalization of a measured 414C value of atmospheric CO2 to a
613C value of -25% 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".
613C value of -25% 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".