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    Horizontal density structure and restratification of the Arctic Ocean surface layer

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    jpo-d-11-0125%2E1.pdf (1.768Mb)
    Date
    2012-04
    Author
    Timmermans, Mary-Louise  Concept link
    Cole, Sylvia T.  Concept link
    Toole, John M.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/5188
    As published
    https://doi.org/10.1175/JPO-D-11-0125.1
    DOI
    10.1175/JPO-D-11-0125.1
    Keyword
     Arctic; Ocean dynamics 
    Abstract
    Ice-tethered profiler (ITP) measurements from the Arctic Ocean’s Canada Basin indicate an ocean surface layer beneath sea ice with significant horizontal density structure on scales of hundreds of kilometers to the order 1 km submesoscale. The observed horizontal gradients in density are dynamically important in that they are associated with restratification of the surface ocean when dense water flows under light water. Such restratification is prevalent in wintertime and competes with convective mixing upon buoyancy forcing (e.g., ice growth and brine rejection) and shear-driven mixing when the ice moves relative to the ocean. Frontal structure and estimates of the balanced Richardson number point to the likelihood of dynamical restratification by isopycnal tilt and submesoscale baroclinic instability. Based on the evidence here, it is likely that submesoscale processes play an important role in setting surface-layer properties and lateral density variability in the Arctic Ocean.
    Description
    Author Posting. © American Meteorological Society, 2012. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Physical Oceanography 42 (2012): 659–668, doi:10.1175/JPO-D-11-0125.1.
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    • Physical Oceanography (PO)
    Suggested Citation
    Journal of Physical Oceanography 42 (2012): 659–668
     

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