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    Lability of DOC transported by Alaskan rivers to the Arctic Ocean

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    Article (145.9Kb)
    Additional file information (2.534Kb)
    Table S1: DOC concentrations in Alaskan arctic river waters after one month and three month incubations in the dark at 20°C with and without nutrients added. (18.05Kb)
    Table S1: DOC concentrations in Alaskan arctic river waters after one month and three month incubations in the dark at 20°C with and without nutrients added. (1.361Kb)
    Date
    2008-02-09
    Author
    Holmes, Robert M.  Concept link
    McClelland, James W.  Concept link
    Raymond, Peter A.  Concept link
    Frazer, Breton B.  Concept link
    Peterson, Bruce J.  Concept link
    Stieglitz, Marc  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/3356
    As published
    https://doi.org/10.1029/2007GL032837
    DOI
    10.1029/2007GL032837
    Keyword
     DOC; Arctic; Rivers 
    Abstract
    Arctic rivers transport huge quantities of dissolved organic carbon (DOC) to the Arctic Ocean. The prevailing paradigm is that DOC in arctic rivers is refractory and therefore of little significance for the biogeochemistry of the Arctic Ocean. We show that there is substantial seasonal variability in the lability of DOC transported by Alaskan rivers to the Arctic Ocean: little DOC is lost during incubations of samples collected during summer, but substantial losses (20–40%) occur during incubations of samples collected during the spring freshet when the majority of the annual DOC flux occurs. We speculate that restricting sampling to summer may have biased past studies. If so, then fluvial inputs of DOC to the Arctic Ocean may have a much larger influence on coastal ocean biogeochemistry than previously realized, and reconsideration of the role of terrigenous DOC on carbon, microbial, and food-web dynamics on the arctic shelf will be warranted.
    Description
    Author Posting. © American Geophysical Union, 2008. 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 35 (2008): L03402, doi:10.1029/2007GL032837.
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    Suggested Citation
    Article: Holmes, Robert M., McClelland, James W., Raymond, Peter A., Frazer, Breton B., Peterson, Bruce J., Stieglitz, Marc, "Lability of DOC transported by Alaskan rivers to the Arctic Ocean", Geophysical Research Letters 35 (2008): L03402, DOI:10.1029/2007GL032837, https://hdl.handle.net/1912/3356
     

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