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Coral carbon isotope sensitivity to growth rate and water depth with paleo-sea level implications

Author

Listed:
  • Braddock K. Linsley

    (Lamont-Doherty Earth Observatory of Columbia University)

  • Robert B. Dunbar

    (Stanford University)

  • Emilie P. Dassié

    (Lamont-Doherty Earth Observatory of Columbia University
    CNRS, EPOC, UMR 5805)

  • Neil Tangri

    (Stanford University)

  • Henry C. Wu

    (Leibniz Centre for Tropical Marine Research (ZMT) GmbH)

  • Logan D. Brenner

    (Lamont-Doherty Earth Observatory of Columbia University)

  • Gerard M. Wellington

    (University of Houston)

Abstract

Although reef coral skeletal carbon isotopes (δ13C) are routinely measured, interpretation remains controversial. Here we show results of a consistent inverse relationship between coral δ13C and skeletal extension rate over the last several centuries in Porites corals at Fiji, Tonga, Rarotonga and American Samoa in the southwest Pacific. Beginning in the 1950s, this relationship breaks down as the atmospheric 13C Suess effect shifts skeletal δ13C > 1.0‰ lower. We also compiled coral δ13C from a global array of sites and find that mean coral δ13C decreases by −1.4‰ for every 5 m increase in water depth (R = 0.68, p

Suggested Citation

  • Braddock K. Linsley & Robert B. Dunbar & Emilie P. Dassié & Neil Tangri & Henry C. Wu & Logan D. Brenner & Gerard M. Wellington, 2019. "Coral carbon isotope sensitivity to growth rate and water depth with paleo-sea level implications," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10054-x
    DOI: 10.1038/s41467-019-10054-x
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