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    Net atmospheric mercury deposition to Svalbard : estimates from lacustrine sediments

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    drevnicketal2012.pdf (362.9Kb)
    Date
    2012-05
    Author
    Drevnick, Paul E.  Concept link
    Yang, Handong  Concept link
    Lamborg, Carl H.  Concept link
    Rose, Neil L.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/5252
    As published
    https://doi.org/10.1016/j.atmosenv.2012.05.048
    Keyword
     Mercury; Atmospheric deposition; Arctic; Svalbard; Lake sediments 
    Abstract
    In this study we used lake sediments, which faithfully record Hg inputs, to derive estimates of net atmospheric Hg deposition to Svalbard, Norwegian Arctic. With the exception of one site affected by local pollution, the study lakes show twofold to fivefold increases in sedimentary Hg accumulation since 1850, likely due to long-range atmospheric transport and deposition of anthropogenic Hg. Sedimentary Hg accumulation in these lakes is a linear function of the ratio of catchment area to lake area, and we used this relationship to model net atmospheric Hg flux: preindustrial and modern estimates are 2.5±3.3 μg/m2/y and 7.0±3.0 μg/m2/y, respectively. The modern estimate, by comparison with data for Hg wet deposition, indicates that atmospheric mercury depletion events (AMDEs) or other dry deposition processes contribute approximately half (range 0-70%) of the net flux. Hg from AMDEs may be moving in significant quantities into aquatic ecosystems, where it is a concern because of contamination of aquatic food webs.
    Description
    Author Posting. © The Author(s), 2012. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Atmospheric Environment 59 (2012): 509-513, doi:10.1016/j.atmosenv.2012.05.048.
    Collections
    • Marine Chemistry and Geochemistry (MC&G)
    Suggested Citation
    Preprint: Drevnick, Paul E., Yang, Handong, Lamborg, Carl H., Rose, Neil L., "Net atmospheric mercury deposition to Svalbard : estimates from lacustrine sediments", 2012-05, https://doi.org/10.1016/j.atmosenv.2012.05.048, https://hdl.handle.net/1912/5252
     

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