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    A laboratory study of iceberg side melting in vertically sheared flows

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    jpo-d-17-0185.1.pdf (346.9Kb)
    Date
    2018-06-12
    Author
    FitzMaurice, Anna  Concept link
    Cenedese, Claudia  Concept link
    Straneo, Fiamma  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/10485
    As published
    https://doi.org/10.1175/JPO-D-17-0185.1
    DOI
    10.1175/JPO-D-17-0185.1
    Keyword
     Ocean; Antarctica; Arctic; Laboratory/physical models; Parameterization 
    Abstract
    An earlier study indicates that the side melting of icebergs subject to vertically homogeneous horizontal velocities is controlled by two distinct regimes, which depend on the melt plume behavior and produce a nonlinear dependence of side melt rate on velocity. Here, we extend this study to consider ice blocks melting in a two-layer vertically sheared flow in a laboratory setting. It is found that the use of the vertically averaged flow speed in current melt parameterizations gives an underestimate of the submarine side melt rate, in part because of the nonlinearity of the dependence of the side melt rate on flow speed but also because vertical shear in the horizontal velocity profile fundamentally changes the flow splitting around the ice block and consequently the velocity felt by the ice surface. An observational record of 90 icebergs in a Greenland fjord suggests that this effect could produce an average underestimate of iceberg side melt rates of 21%.
    Description
    Author Posting. © American Meteorological Society, 2018. 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 48 (2018): 1367-1373, doi:10.1175/JPO-D-17-0185.1.
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    • Physical Oceanography (PO)
    Suggested Citation
    Journal of Physical Oceanography 48 (2018): 1367-1373
     

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