• Radiocarbon Content of Tropospheric CO2 at China Lake, California 1977-1983

      Berger, Rainer; Jackson, T. B.; Michael, Robert; Suess, H. E. (American Journal of Science, 1987-01-01)
      The measurements reported here are a continuation of tropospheric radiocarbon measurements in carbon dioxide carried out since 1961 at our China Lake, California collection facility. The data show a continued decrease in radiocarbon activity from ca 330 per mil in 1977 to 215 per mil in 1983 in agreement with similar analyses in Europe for the same time interval.