Contribution of Southern Ocean surface-water stratification to low atmospheric CO2 concentrations during the last glacial period

Roger François, Mark A. Altabett, Ein-Fen Yu, Daniel M. Sigman, Michael P. Bacon, Martin Frank, Gerhard Bohrmann, Gilles Bareille, Laurent D. Labeyrie

    Research output: Contribution to journalArticlepeer-review

    439 Citations (Scopus)

    Abstract

    The nitrogen-isotope record preserved in Southern Ocean sediments, along with several geochemical tracers for the settling fluxes of biogenic matter, reveals patterns of past nutrient supply to phytoplankton and surface-water stratification in this oceanic region. Areal averaging of these spatial patterns indicates that reduction of the CO2 'leak' from ocean to atmosphere by increased surface-water stratification south of the Polar Front made a greater contribution to the lowering of atmospheric CO2 concentration during the Last Glacial Maximum than did the increased export of organic carbon from surface to deep waters occurring further north.

    Original languageEnglish
    Pages (from-to)929-935
    Number of pages7
    JournalNature
    Volume389
    Issue number6654
    DOIs
    Publication statusPublished - 1997 Jan 1

    ASJC Scopus subject areas

    • General

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