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    Observations of Gulf Stream Meander-Induced Disturbances

    Source: Journal of Physical Oceanography:;1994:;Volume( 024 ):;issue: 012::page 2534
    Author:
    Hogg, Nelson G.
    DOI: 10.1175/1520-0485(1994)024<2534:OOGSMI>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Using moored array data collected across the Gulf Stream at 55°W, the author has investigated the dynamic signatures of the velocity fluctuations at the thermocline (550 m) and near-bottom (4000 m) levels. The cross-stream amplitude and phase structures for motions with period from 64 to 12 days, in a coordinate frame aligned with the instantaneous stream, have a striking resemblance to those computed from small amplitude instability theory. It is the sinuous or asymmetric mode that appears to dominate the observed fluctuations as is predicted. In addition, the mean downstream velocity at the two levels is consistent with a two-layer model for the mean flow in which the lower layer has uniform potential vorticity. When fit to the data this model predicts a value for the rate of change of the Coriolis parameter appropriate to this latitude, but one would expect it to be augmented by a factor of 2 or so by the significant slope of the bottom in this region.
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      Observations of Gulf Stream Meander-Induced Disturbances

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4165320
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    contributor authorHogg, Nelson G.
    date accessioned2017-06-09T14:51:14Z
    date available2017-06-09T14:51:14Z
    date copyright1994/12/01
    date issued1994
    identifier issn0022-3670
    identifier otherams-28227.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4165320
    description abstractUsing moored array data collected across the Gulf Stream at 55°W, the author has investigated the dynamic signatures of the velocity fluctuations at the thermocline (550 m) and near-bottom (4000 m) levels. The cross-stream amplitude and phase structures for motions with period from 64 to 12 days, in a coordinate frame aligned with the instantaneous stream, have a striking resemblance to those computed from small amplitude instability theory. It is the sinuous or asymmetric mode that appears to dominate the observed fluctuations as is predicted. In addition, the mean downstream velocity at the two levels is consistent with a two-layer model for the mean flow in which the lower layer has uniform potential vorticity. When fit to the data this model predicts a value for the rate of change of the Coriolis parameter appropriate to this latitude, but one would expect it to be augmented by a factor of 2 or so by the significant slope of the bottom in this region.
    publisherAmerican Meteorological Society
    titleObservations of Gulf Stream Meander-Induced Disturbances
    typeJournal Paper
    journal volume24
    journal issue12
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/1520-0485(1994)024<2534:OOGSMI>2.0.CO;2
    journal fristpage2534
    journal lastpage2545
    treeJournal of Physical Oceanography:;1994:;Volume( 024 ):;issue: 012
    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