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    Transport in an idealized three-gyre system with application to the Adriatic Sea

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    2008JPO3975.1.pdf (4.797Mb)
    Date
    2009-03
    Author
    Rypina, Irina I.  Concept link
    Brown, Michael G.  Concept link
    Kocak, Huseyin  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/4007
    As published
    https://doi.org/10.1175/2008JPO3975.1
    DOI
    10.1175/2008JPO3975.1
    Keyword
     Transport; Gyres; Mediterranean region; Ocean circulation; Lagrangian circulation 
    Abstract
    Motivated by observations of surface drifters in the Adriatic Sea, transport in a three-gyre system is studied with the aid of dynamical systems techniques. Particular attention is paid to the issue of intergyre transport. The velocity field is assumed to be two-dimensional and incompressible and composed of a steady three-gyre background flow on which a time-dependent perturbation is superimposed. Two systems of this type are considered: 1) an observationally motivated, analytically prescribed model consisting of a steady background on which a multiperiodic time-dependent perturbation is superimposed, and 2) an observationally based model of the Adriatic Sea consisting of the mean surface circulation derived from surface drifter trajectories on which a time-dependent altimetry-based perturbation velocity field is superimposed. It is shown that for a small perturbation to the steady three-gyre background, two of the gyres exchange no fluid with the third gyre. When the perturbation strength exceeds a certain threshold, transport between all three gyres occurs. This behavior is described theoretically, illustrated using the analytic model and shown to be consistent with the observationally based model of the Adriatic. The relevance of the work presented to more complicated multiple-gyre problems is discussed.
    Description
    Author Posting. © American Meteorological Society, 2009. 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 39 (2009): 675-690, doi:10.1175/2008JPO3975.1.
    Collections
    • Physical Oceanography (PO)
    Suggested Citation
    Journal of Physical Oceanography 39 (2009): 675-690
     

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