Separating natural and bomb-produced radiocarbon in the ocean: The potential alkalinity method

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Abstract

The use of radiocarbon (Δ 14C) as a tracer for oceanic processes generally requires differentiation of naturally occurring radiocarbon from the bomb component produced by atmospheric nuclear weapons testing. We present a new separation method based on the strong linear correlation between Δ 14C and potential alkalinity. Unlike previous techniques the new algorithm is applicable at all latitudes. Additionally, the potential alkalinity method provides an estimate of surface ocean prebomb Δ 14C concentrations. Predictions with the technique appear to be unbiased and have uncertainties which are less than previous techniques.

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Rubin, S. I., & Key, R. M. (2002). Separating natural and bomb-produced radiocarbon in the ocean: The potential alkalinity method. Global Biogeochemical Cycles, 16(4), 52-1-52–19. https://doi.org/10.1029/2001gb001432

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