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    Fofonoff-type, Inertial-Mode Steady States in a Model of the Equatorial Oceans

    Source: Journal of Physical Oceanography:;1985:;Volume( 015 ):;issue: 010::page 1349
    Author:
    Greatbatch, Richard
    ,
    Yamagata, Toshio
    DOI: 10.1175/1520-0485(1985)015<1349:FTIMSS>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: We examine the steady state response in the equatorial regions of a nonlinear, one-active-layer, reduced-gravity shallow water ocean model with meridional boundaries that is driven by uniform wind forcing. When the wind forcing is westward, the final steady state is one of no motion with a zonal pressure gradient balancing the wind forcing, as implied by linear theory. However, when the wind forcing is eastward, a steady state is reached in which a narrow eastward jet along the equator is balanced by a broader westward return flow, the solution resembling Fofonoff's free inertial mode. The entire circulation is confined within equatorial regions. It is shown that Rossby wave energy propagating eastwards from the western boundary is crucial for setting up the mode. This steady solution with motion was found even in a case with weak wind forcing. However, it is easily ?wiped out? by friction (esqecially lateral mixing) in this case. In general, the solutions are found to be sensitive to the lateral mixing which can prevent the equatorial jet from extending all the way to the eastern boundary.
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      Fofonoff-type, Inertial-Mode Steady States in a Model of the Equatorial Oceans

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4163835
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    contributor authorGreatbatch, Richard
    contributor authorYamagata, Toshio
    date accessioned2017-06-09T14:47:36Z
    date available2017-06-09T14:47:36Z
    date copyright1985/10/01
    date issued1985
    identifier issn0022-3670
    identifier otherams-26891.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4163835
    description abstractWe examine the steady state response in the equatorial regions of a nonlinear, one-active-layer, reduced-gravity shallow water ocean model with meridional boundaries that is driven by uniform wind forcing. When the wind forcing is westward, the final steady state is one of no motion with a zonal pressure gradient balancing the wind forcing, as implied by linear theory. However, when the wind forcing is eastward, a steady state is reached in which a narrow eastward jet along the equator is balanced by a broader westward return flow, the solution resembling Fofonoff's free inertial mode. The entire circulation is confined within equatorial regions. It is shown that Rossby wave energy propagating eastwards from the western boundary is crucial for setting up the mode. This steady solution with motion was found even in a case with weak wind forcing. However, it is easily ?wiped out? by friction (esqecially lateral mixing) in this case. In general, the solutions are found to be sensitive to the lateral mixing which can prevent the equatorial jet from extending all the way to the eastern boundary.
    publisherAmerican Meteorological Society
    titleFofonoff-type, Inertial-Mode Steady States in a Model of the Equatorial Oceans
    typeJournal Paper
    journal volume15
    journal issue10
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/1520-0485(1985)015<1349:FTIMSS>2.0.CO;2
    journal fristpage1349
    journal lastpage1354
    treeJournal of Physical Oceanography:;1985:;Volume( 015 ):;issue: 010
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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