Modeling Atmospheric 14C Influences and 14C Ages of Marine Samples to 10,000 BC

1993/01/01 by Minze Stuiver, Thomas F. Braziunas · 13 citations
Earth and Planetary Sciences · Social Sciences · #Geology and Paleoclimatology Research #Archaeology and ancient environmental studies #Pleistocene-Era Hominins and Archaeology

paper · pdf · doi:10.1017/s0033822200013874

Abstract

The detailed radiocarbon age vs. calibrated (cal) age studies of tree rings reported in this Calibration Issue provide a unique data set for precise 14 C age calibration of materials formed in isotopic equilibrium with atmospheric CO 2 . The situation is more complex for organisms formed in other reservoirs, such as lakes and oceans. Here the initial specific 14 C activity may differ from that of the contemporaneous atmosphere. The measured remaining 14 C activity of samples formed in such reservoirs not only reflects 14 C decay (related to sample age) but also the reservoir 14 C activity. As the measured sample 14 C activity figures into the calculation of a conventional 14 C age (Stuiver & Polach 1977), apparent 14 C age differences occur when contemporaneously grown samples of different reservoirs are dated.

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