Secular variation of 14C contained in environmental pine needles and Suess effect

Abstract

14C concentrations were measured for needle leaves from pine trees growing several locations on the Higashiyama campus of Nagoya University, in the east suburbs of Nagoya city, Aichi prefecture, central Japan, to investigate the Suess effect, i.e., the local effect of diluting 14C concentration in the atmosphere by 14C-free CO2 exhausted in combustion of fossil fuel, in particular, that from motor vehicles.