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    High particle export over the continental shelf of the west Antarctic Peninsula

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    2010GL045448.pdf (140.2Kb)
    Date
    2010-11-24
    Author
    Buesseler, Ken O.  Concept link
    McDonnell, Andrew M. P.  Concept link
    Schofield, Oscar M. E.  Concept link
    Steinberg, Deborah K.  Concept link
    Ducklow, Hugh W.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/4282
    As published
    https://doi.org/10.1029/2010GL045448
    DOI
    10.1029/2010GL045448
    Keyword
     Particle export; Sediment trap; Thorium-234 
    Abstract
    Drifting cylindrical traps and the flux proxy 234Th indicate more than an order of magnitude higher sinking fluxes of particulate carbon and 234Th in January 2009 than measured by a time-series conical trap used regularly on the shelf of the west Antarctic Peninsula (WAP). The higher fluxes measured in this study have several implications for our understanding of the WAP ecosystem. Larger sinking fluxes result in a revised export efficiency of at least 10% (C flux/net primary production) and a requisite lower regeneration efficiency in surface waters. High fluxes also result in a large supply of sinking organic matter to support subsurface and benthic food webs on the continental shelf. These new findings call into question the magnitude of seasonal and interannual variability in particle flux and reaffirm the difficulty of using moored conical traps as a quantitative flux collector in shallow waters.
    Description
    Author Posting. © American Geophysical Union, 2010. 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 37 (2010): L22606, doi:10.1029/2010GL045448.
    Collections
    • Marine Chemistry and Geochemistry (MC&G)
    • Ecosystems Center
    Suggested Citation
    Geophysical Research Letters 37 (2010): L22606
     

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