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    The five stable noble gases are sensitive unambiguous tracers of glacial meltwater

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    Article (331.7Kb)
    Readme (13.23Kb)
    Sections S1 and S2 and Table S1 (54Kb)
    Figure S1 (17.41Kb)
    Figure S2 (103.2Kb)
    Date
    2014-04-16
    Author
    Loose, Brice  Concept link
    Jenkins, William J.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/6731
    As published
    https://doi.org/10.1002/2013GL058804
    DOI
    10.1002/2013GL058804
    Keyword
     Tracers; Noble gases; Meltwater; Glacier; Glacial ice; Latent heat 
    Abstract
    The five inert noble gases—He, Ne, Ar, Kr, and Xe—exhibit a unique dissolved gas saturation pattern resulting from the formation and addition of glacial meltwater to seawater. He and Ne become oversaturated, and Ar, Kr, and Xe become undersaturated to varying percentages. For example, addition of 10‰ glacial meltwater to seawater results in a saturation anomaly of ΔHe = 12.8%, ΔNe = 8.9%, ΔAr = −0.5%, ΔKr = −2.2%, and ΔXe = −3.3%. This pattern in noble gas saturation reflects a unique meltwater signature that is distinct from the other major physical processes that modify the gas concentration and saturation, namely, seasonal changes in temperature at the ocean surface and bubble mediated gas exchange. We use Optimum Multiparameter analysis to illustrate how all five noble gases can help distinguish glacial meltwater from wind-driven bubble injection, making them a potentially valuable suite of tracers for glacial melt and its concentration in the deep waters of the world ocean.
    Description
    Author Posting. © American Geophysical Union, 2014. 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 41 (2014): 2835–2841, doi:10.1002/2013GL058804.
    Collections
    • Marine Chemistry and Geochemistry (MC&G)
    Suggested Citation
    Geophysical Research Letters 41 (2014): 2835–2841
     

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