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    Evolution of Isolated Interior Vortices in the Ocean

    Source: Journal of Physical Oceanography:;1997:;Volume( 027 ):;issue: 005::page 727
    Author:
    Morel, Yves
    ,
    McWilliams, James
    DOI: 10.1175/1520-0485(1997)027<0727:EOIIVI>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The beta effect on the evolution of intrathermocline vortices, such as anticyclonic Mediterranean Water eddies (meddies), is investigated in a quasigeostrophic numerical model with fine high vertical resolution. The authors define two types of structure for isolated vortices depending on the strength of relative vorticity in comparison with vortex stretching. When stretching dominates, the potential vorticity structure consists of poles of opposite sign primarily distributed along the vertical axis. In that case, interactions among the poles can drastically influence the propagation by increasing both the mean speed and its temporal variability. The trajectories are then highly dependent on the initial vertical structure of the vortex. They exhibit loops, cusps, and stagnation phases, and the mean propagation is generally southwestward at a speed of 1?2 cm s?1 for an anticyclone. Sometimes a steadily translating structure (modon) emerges and propagates eastward. These modons are persistent (hence stable), and they have a strong axisymmetric component plus a dipolar barotropic component.
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      Evolution of Isolated Interior Vortices in the Ocean

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4165834
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    contributor authorMorel, Yves
    contributor authorMcWilliams, James
    date accessioned2017-06-09T14:52:32Z
    date available2017-06-09T14:52:32Z
    date copyright1997/05/01
    date issued1997
    identifier issn0022-3670
    identifier otherams-28690.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4165834
    description abstractThe beta effect on the evolution of intrathermocline vortices, such as anticyclonic Mediterranean Water eddies (meddies), is investigated in a quasigeostrophic numerical model with fine high vertical resolution. The authors define two types of structure for isolated vortices depending on the strength of relative vorticity in comparison with vortex stretching. When stretching dominates, the potential vorticity structure consists of poles of opposite sign primarily distributed along the vertical axis. In that case, interactions among the poles can drastically influence the propagation by increasing both the mean speed and its temporal variability. The trajectories are then highly dependent on the initial vertical structure of the vortex. They exhibit loops, cusps, and stagnation phases, and the mean propagation is generally southwestward at a speed of 1?2 cm s?1 for an anticyclone. Sometimes a steadily translating structure (modon) emerges and propagates eastward. These modons are persistent (hence stable), and they have a strong axisymmetric component plus a dipolar barotropic component.
    publisherAmerican Meteorological Society
    titleEvolution of Isolated Interior Vortices in the Ocean
    typeJournal Paper
    journal volume27
    journal issue5
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/1520-0485(1997)027<0727:EOIIVI>2.0.CO;2
    journal fristpage727
    journal lastpage748
    treeJournal of Physical Oceanography:;1997:;Volume( 027 ):;issue: 005
    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
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