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    Linear Instability of a Current Flowing Along a Bottom Slope Using a Three-Layer Model

    Source: Journal of Physical Oceanography:;1983:;Volume( 013 ):;issue: 002::page 208
    Author:
    Ikeda, Motoyoshi
    DOI: 10.1175/1520-0485(1983)013<0208:LIOACF>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: A quasi-geostrophic model of a three-layer fluid on an f-plane is employed to study instability of a current flowing over a uniform bottom slope with isobaths parallel to the current. The model has a basic flow only in the uppermost layer but no basic motion in the middle or lowest layer (or no relative motion between the two lower Layers). The two lower layers representing a lower ocean have a relatively small density difference which is not considered in traditional two-layer models. In addition to a deep baroclinic mode which is nearly homogeneous in the two lower layers, a surface-intensified, baroclinic mode whose amplitude in the lowest layer is negligible grows in the case of a realistic slope. The jet-like basic flow whose half-width is comparable to a deformation radius also supports a barotropically unstable mode maintained by a horizontal shear in the basic flow. This mode becomes less active as the jet width increase or as the jet approaches a vertical side boundary modeled after a steep continental slope.
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      Linear Instability of a Current Flowing Along a Bottom Slope Using a Three-Layer Model

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    contributor authorIkeda, Motoyoshi
    date accessioned2017-06-09T14:46:27Z
    date available2017-06-09T14:46:27Z
    date copyright1983/02/01
    date issued1983
    identifier issn0022-3670
    identifier otherams-26458.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4163354
    description abstractA quasi-geostrophic model of a three-layer fluid on an f-plane is employed to study instability of a current flowing over a uniform bottom slope with isobaths parallel to the current. The model has a basic flow only in the uppermost layer but no basic motion in the middle or lowest layer (or no relative motion between the two lower Layers). The two lower layers representing a lower ocean have a relatively small density difference which is not considered in traditional two-layer models. In addition to a deep baroclinic mode which is nearly homogeneous in the two lower layers, a surface-intensified, baroclinic mode whose amplitude in the lowest layer is negligible grows in the case of a realistic slope. The jet-like basic flow whose half-width is comparable to a deformation radius also supports a barotropically unstable mode maintained by a horizontal shear in the basic flow. This mode becomes less active as the jet width increase or as the jet approaches a vertical side boundary modeled after a steep continental slope.
    publisherAmerican Meteorological Society
    titleLinear Instability of a Current Flowing Along a Bottom Slope Using a Three-Layer Model
    typeJournal Paper
    journal volume13
    journal issue2
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/1520-0485(1983)013<0208:LIOACF>2.0.CO;2
    journal fristpage208
    journal lastpage223
    treeJournal of Physical Oceanography:;1983:;Volume( 013 ):;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