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We have measured radiocarbon in prebomb known-age shells and coral from the Indian Ocean and southeast Asia to determine marine reservoir age corrections. Western Indian Ocean results show a strong 14 C depletion due to upwelling in the Arabian Sea, and indicate that this signal is advected over a wide area to the east and south. In contrast, the surface waters of the South China Sea contain relatively high levels of 14 C, due in part to the input of well-equilibrated water masses from the western Pacific. The easternmost regions of the Indian Ocean are also strongly influenced by the flowthrough of Pacific waters north of Australia.
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John Southon
Michaele Kashgarian
Michel Fontugne
Radiocarbon
Centre National de la Recherche Scientifique
University of California, Irvine
University of Hong Kong
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Southon et al. (Tue,) studied this question.
www.synapsesocial.com/papers/69d833c58c03fbaff8bee00f — DOI: https://doi.org/10.1017/s0033822200064778