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    Carbon isotope ratios of organic compound fractions in oceanic suspended particles

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    2006GL027928.pdf (204.2Kb)
    Date
    2006-12-09
    Author
    Hwang, Jeomshik  Concept link
    Druffel, Ellen R. M.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/3337
    As published
    https://doi.org/10.1029/2006GL027928
    DOI
    10.1029/2006GL027928
    Keyword
     Suspended POC; Organic fractions; Carbon isotopes 
    Abstract
    To study cycling of organic fractions in the ocean, relative abundances and radio- and stable-carbon isotope measurements of total lipid extract, acid-soluble, and acid-insoluble fractions of suspended particulate organic carbon (POC) were made. Changes in relative abundances occurred mostly in the upper 1000 m of the water column, with a decrease in total lipid extract and the acid-soluble fraction and an increase in the acid-insoluble fraction with increasing depth. We found lower Δ14C values for total lipid extract and the acid-insoluble fraction than for the acid-soluble fraction, which is consistent with the previous suggestion of incorporation of dissolved organic carbon and/or resuspended sediment to POC (Druffel and Williams, 1990; Sherrell et al., 1998). The Δ14C values of these fractions in a given organic carbon pool must be understood in terms of acquisition of 14C-depleted carbon from other carbon pools in addition to aging within the reservoir.
    Description
    Author Posting. © American Geophysical Union, 2006. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 33 (2006): L23610, doi:10.1029/2006GL027928.
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    • Marine Chemistry and Geochemistry (MC&G)
    Suggested Citation
    Geophysical Research Letters 33 (2006): L23610
     

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