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    Tracer Stirring around a Meddy: The Formation of Layering

    Source: Journal of Physical Oceanography:;2014:;Volume( 045 ):;issue: 002::page 407
    Author:
    Meunier, Thomas
    ,
    Ménesguen, Claire
    ,
    Schopp, Richard
    ,
    Le Gentil, Sylvie
    DOI: 10.1175/JPO-D-14-0061.1
    Publisher: American Meteorological Society
    Abstract: he dynamics of the formation of layering surrounding meddy-like vortex lenses is investigated using primitive equation (PE), quasigeostrophic (QG), and tracer advection models. Recent in situ data inside a meddy confirmed the formation of highly density-compensated layers in temperature and salinity at the periphery of the vortex core. Very high-resolution PE modeling of an idealized meddy showed the formation of realistic layers even in the absence of double-diffusive processes. The strong density compensation observed in the PE model, in good agreement with in situ data, suggests that stirring might be a leading process in the generation of layering. Passive tracer experiments confirmed that the vertical variance cascade in the periphery of the vortex core is triggered by the vertical shear of the azimuthal velocity, resulting in the generation of thin layers. The time evolution of this process down to scales of O(10) m is quantified, and a simple scaling is proposed and shown to describe precisely the thinning down of the layers as a function of the initial tracer column?s horizontal width and the vertical shear of the azimuthal velocity. Nonlinear QG simulations were performed and analyzed for comparison with the work of Hua et al. A step-by-step interpretation of these results on the evolution of layering is proposed in the context of tracer stirring.
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      Tracer Stirring around a Meddy: The Formation of Layering

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4226805
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    contributor authorMeunier, Thomas
    contributor authorMénesguen, Claire
    contributor authorSchopp, Richard
    contributor authorLe Gentil, Sylvie
    date accessioned2017-06-09T17:20:47Z
    date available2017-06-09T17:20:47Z
    date copyright2015/02/01
    date issued2014
    identifier issn0022-3670
    identifier otherams-83566.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4226805
    description abstracthe dynamics of the formation of layering surrounding meddy-like vortex lenses is investigated using primitive equation (PE), quasigeostrophic (QG), and tracer advection models. Recent in situ data inside a meddy confirmed the formation of highly density-compensated layers in temperature and salinity at the periphery of the vortex core. Very high-resolution PE modeling of an idealized meddy showed the formation of realistic layers even in the absence of double-diffusive processes. The strong density compensation observed in the PE model, in good agreement with in situ data, suggests that stirring might be a leading process in the generation of layering. Passive tracer experiments confirmed that the vertical variance cascade in the periphery of the vortex core is triggered by the vertical shear of the azimuthal velocity, resulting in the generation of thin layers. The time evolution of this process down to scales of O(10) m is quantified, and a simple scaling is proposed and shown to describe precisely the thinning down of the layers as a function of the initial tracer column?s horizontal width and the vertical shear of the azimuthal velocity. Nonlinear QG simulations were performed and analyzed for comparison with the work of Hua et al. A step-by-step interpretation of these results on the evolution of layering is proposed in the context of tracer stirring.
    publisherAmerican Meteorological Society
    titleTracer Stirring around a Meddy: The Formation of Layering
    typeJournal Paper
    journal volume45
    journal issue2
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/JPO-D-14-0061.1
    journal fristpage407
    journal lastpage423
    treeJournal of Physical Oceanography:;2014:;Volume( 045 ):;issue: 002
    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