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    Isopycnal Eddy Diffusivities and Critical Layers in the Kuroshio Extension from an Eddying Ocean Model

    Source: Journal of Physical Oceanography:;2014:;Volume( 044 ):;issue: 008::page 2191
    Author:
    Chen, Ru
    ,
    McClean, Julie L.
    ,
    Gille, Sarah T.
    ,
    Griesel, Alexa
    DOI: 10.1175/JPO-D-13-0258.1
    Publisher: American Meteorological Society
    Abstract: igh spatial resolution isopycnal diffusivities are estimated in the Kuroshio Extension (KE) region (28°?40°N, 120°?190°E) from a global ° Parallel Ocean Program (POP) simulation. The numerical float tracks are binned using a clustering approach. The number of tracks in each bin is thus roughly the same leading to diffusivity estimates that converge better than those in bins defined by a regular geographic grid. Cross-stream diffusivities are elevated in the southern recirculation gyre region, near topographic obstacles and downstream in the KE jet, where the flow has weakened. Along-stream diffusivities, which are much larger than cross-stream diffusivities, correlate well with the magnitudes of eddy velocity. The KE jet suppresses cross-stream mixing only in some longitude ranges. This study estimates the critical layer depth both from linear local baroclinic instability analysis and from eddy phase speeds in the POP model using the Radon transform. The latter is a better predictor of large mixing length in the cross-stream direction. Critical layer theory is most applicable in the intense jet regions away from topography.
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      Isopycnal Eddy Diffusivities and Critical Layers in the Kuroshio Extension from an Eddying Ocean Model

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4226681
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    contributor authorChen, Ru
    contributor authorMcClean, Julie L.
    contributor authorGille, Sarah T.
    contributor authorGriesel, Alexa
    date accessioned2017-06-09T17:20:21Z
    date available2017-06-09T17:20:21Z
    date copyright2014/08/01
    date issued2014
    identifier issn0022-3670
    identifier otherams-83454.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4226681
    description abstractigh spatial resolution isopycnal diffusivities are estimated in the Kuroshio Extension (KE) region (28°?40°N, 120°?190°E) from a global ° Parallel Ocean Program (POP) simulation. The numerical float tracks are binned using a clustering approach. The number of tracks in each bin is thus roughly the same leading to diffusivity estimates that converge better than those in bins defined by a regular geographic grid. Cross-stream diffusivities are elevated in the southern recirculation gyre region, near topographic obstacles and downstream in the KE jet, where the flow has weakened. Along-stream diffusivities, which are much larger than cross-stream diffusivities, correlate well with the magnitudes of eddy velocity. The KE jet suppresses cross-stream mixing only in some longitude ranges. This study estimates the critical layer depth both from linear local baroclinic instability analysis and from eddy phase speeds in the POP model using the Radon transform. The latter is a better predictor of large mixing length in the cross-stream direction. Critical layer theory is most applicable in the intense jet regions away from topography.
    publisherAmerican Meteorological Society
    titleIsopycnal Eddy Diffusivities and Critical Layers in the Kuroshio Extension from an Eddying Ocean Model
    typeJournal Paper
    journal volume44
    journal issue8
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/JPO-D-13-0258.1
    journal fristpage2191
    journal lastpage2211
    treeJournal of Physical Oceanography:;2014:;Volume( 044 ):;issue: 008
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian