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Upper-ocean-to-atmosphere radiocarbon offsets imply fast deglacial carbon dioxide release

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  • Kathryn A. Rose

    (University of California
    Present address: Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02540, USA.)

  • Elisabeth L. Sikes

    (Institute of Marine and Coastal Sciences, Rutgers University)

  • Thomas P. Guilderson

    (Lawrence Livermore National Laboratory
    Institute of Marine Sciences, University of California)

  • Phil Shane

    (School of Environment, University of Auckland)

  • Tessa M. Hill

    (University of California)

  • Rainer Zahn

    (Institució Catalana de Recerca i Estudis Avançats, ICREA, Universitat Autònoma de Barcelona, Institut de Ciència i Tecnologia Ambientals)

  • Howard J. Spero

    (University of California)

Abstract

Carbon dioxide release during deglaciation At the end of the last ice age, rising atmospheric carbon dioxide levels coincided with a decline in carbon-14 levels, suggesting the release of very 'old' (radiocarbon-depleted) carbon dioxide from the deep ocean to the atmosphere. Rose et al. present radiocarbon records of surface and intermediate depth waters from two sediment cores in the southwest Pacific and Southern Ocean, and find a steady 170 per mil decrease in Δ14C that precedes and roughly equals in magnitude the decrease in the atmospheric radiocarbon signal during the early stages of the glacial–interglacial climatic transition. The initial rise in carbon dioxide levels may have originated from intermediate Southern Ocean water masses that were not strongly depleted in radiocarbon, followed by the release of radiocarbon-depleted carbon dioxide from deeper North Pacific waters.

Suggested Citation

  • Kathryn A. Rose & Elisabeth L. Sikes & Thomas P. Guilderson & Phil Shane & Tessa M. Hill & Rainer Zahn & Howard J. Spero, 2010. "Upper-ocean-to-atmosphere radiocarbon offsets imply fast deglacial carbon dioxide release," Nature, Nature, vol. 466(7310), pages 1093-1097, August.
    • Handle: RePEc:nat:nature:v:466:y:2010:i:7310:d:10.1038_nature09288
    DOI: 10.1038/nature09288
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    Cited by:

    1. Jingyu Liu & Yipeng Wang & Samuel L. Jaccard & Nan Wang & Xun Gong & Nianqiao Fang & Rui Bao, 2023. "Pre-aged terrigenous organic carbon biases ocean ventilation-age reconstructions in the North Atlantic," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    2. Gagan Mandal & Shih-Yu Lee & Jia-Yuh Yu, 2021. "The Roles of Wind and Sea Ice in Driving the Deglacial Change in the Southern Ocean Upwelling: A Modeling Study," Sustainability, MDPI, vol. 13(1), pages 1-21, January.

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