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    The Influence of Boundary Conditions on Midlatitude Jet Separation in Ocean Numerical Models

    Source: Journal of Physical Oceanography:;1991:;Volume( 021 ):;issue: 009::page 1290
    Author:
    Chassignet, Eric P.
    ,
    Gent, Peter R.
    DOI: 10.1175/1520-0485(1991)021<1290:TIOBCO>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The separation Point of a midlatitude jet from the western boundary in ocean numerical models depends upon both the governing equations and the vertical coordinate used. Systematic differences in the point of separation between level and layer models are shown. In level models, the separation usually occurs poleward of the zero wind-stress curl line, whereas, in layer models, it usually occurs equatorward. These differences are caused by two aspects of the numerical implementation. First, the wind forcing is usually assumed to act as a body force over the upper layer or level in the models, and this corresponds to a different physical assumption. Second, the free-slip boundary condition is imposed as zero vorticity in both models. This is an inconsistency because vorticity is not the same quantity when the governing equations are formulated in physical (level model) and isopycnal (layer model) coordinates. The effects on separation of these numerical implementation differences are illustrated using analytical solutions of linear models and numerical solutions of several nonlinear models.
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      The Influence of Boundary Conditions on Midlatitude Jet Separation in Ocean Numerical Models

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4164855
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    contributor authorChassignet, Eric P.
    contributor authorGent, Peter R.
    date accessioned2017-06-09T14:50:05Z
    date available2017-06-09T14:50:05Z
    date copyright1991/09/01
    date issued1991
    identifier issn0022-3670
    identifier otherams-27809.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4164855
    description abstractThe separation Point of a midlatitude jet from the western boundary in ocean numerical models depends upon both the governing equations and the vertical coordinate used. Systematic differences in the point of separation between level and layer models are shown. In level models, the separation usually occurs poleward of the zero wind-stress curl line, whereas, in layer models, it usually occurs equatorward. These differences are caused by two aspects of the numerical implementation. First, the wind forcing is usually assumed to act as a body force over the upper layer or level in the models, and this corresponds to a different physical assumption. Second, the free-slip boundary condition is imposed as zero vorticity in both models. This is an inconsistency because vorticity is not the same quantity when the governing equations are formulated in physical (level model) and isopycnal (layer model) coordinates. The effects on separation of these numerical implementation differences are illustrated using analytical solutions of linear models and numerical solutions of several nonlinear models.
    publisherAmerican Meteorological Society
    titleThe Influence of Boundary Conditions on Midlatitude Jet Separation in Ocean Numerical Models
    typeJournal Paper
    journal volume21
    journal issue9
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/1520-0485(1991)021<1290:TIOBCO>2.0.CO;2
    journal fristpage1290
    journal lastpage1299
    treeJournal of Physical Oceanography:;1991:;Volume( 021 ):;issue: 009
    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