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    Arctic Ocean basin liquid freshwater storage trend 1992–2012

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    Date
    2014-02-12
    Author
    Rabe, Benjamin  Concept link
    Karcher, Michael  Concept link
    Kauker, Frank  Concept link
    Schauer, Ursula  Concept link
    Toole, John M.  Concept link
    Krishfield, Richard A.  Concept link
    Pisarev, Sergey  Concept link
    Kikuchi, Takashi  Concept link
    Su, J.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/6617
    As published
    https://doi.org/10.1002/2013GL058121
    DOI
    10.1002/2013GL058121
    Keyword
     Arctic; Liquid freshwater; Observation; Model 
    Abstract
    Freshwater in the Arctic Ocean plays an important role in the regional ocean circulation, sea ice, and global climate. From salinity observed by a variety of platforms, we are able, for the first time, to estimate a statistically reliable liquid freshwater trend from monthly gridded fields over all upper Arctic Ocean basins. From 1992 to 2012 this trend was 600±300 km3 yr−1. A numerical model agrees very well with the observed freshwater changes. A decrease in salinity made up about two thirds of the freshwater trend and a thickening of the upper layer up to one third. The Arctic Ocean Oscillation index, a measure for the regional wind stress curl, correlated well with our freshwater time series. No clear relation to Arctic Oscillation or Arctic Dipole indices could be found. Following other observational studies, an increased Bering Strait freshwater import to the Arctic Ocean, a decreased Davis Strait export, and enhanced net sea ice melt could have played an important role in the freshwater trend we observed.
    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): 961-968, doi:10.1002/2013GL058121.
    Collections
    • Physical Oceanography (PO)
    Suggested Citation
    Geophysical Research Letters 41 (2014): 961-968
     

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