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    Subsurface Jets in the Northwestern Gulf of Mexico

    Source: Journal of Physical Oceanography:;2009:;Volume( 039 ):;issue: 011::page 2875
    Author:
    Hamilton, Peter
    ,
    Badan, Antoine
    DOI: 10.1175/2009JPO4158.1
    Publisher: American Meteorological Society
    Abstract: Subsurface jets, defined as having velocity maxima >40 cm s?1 at depths between 100 and 350 m, and being surrounded by much weaker near-surface currents, have been observed over the northwestern Gulf of Mexico continental slope. The observations were from an array of 14 moorings equipped with upward-looking 75-kHz ADCPs deployed at 450?500 m. A total of 10 jet events were observed in 18 ADCP years of velocity profile data, where these events were clearly not the result of downward-propagating inertial internal waves. The jets had durations from about 1 to 8 days and were usually associated with interactions between similarly sized cyclones and anticyclones over the slope or with the interaction of an eddy with upper-slope topography. The jets are associated with potential vorticity anomalies and their inferred length scales indicate that the dynamics depart from simple geostrophic balances. Observed anomalous density gradients present during the jets seem to involve the tilting of the vertical axis of the center of rotation of one or more of the interacting eddies.
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      Subsurface Jets in the Northwestern Gulf of Mexico

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    contributor authorHamilton, Peter
    contributor authorBadan, Antoine
    date accessioned2017-06-09T16:30:42Z
    date available2017-06-09T16:30:42Z
    date copyright2009/11/01
    date issued2009
    identifier issn0022-3670
    identifier otherams-69181.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4210821
    description abstractSubsurface jets, defined as having velocity maxima >40 cm s?1 at depths between 100 and 350 m, and being surrounded by much weaker near-surface currents, have been observed over the northwestern Gulf of Mexico continental slope. The observations were from an array of 14 moorings equipped with upward-looking 75-kHz ADCPs deployed at 450?500 m. A total of 10 jet events were observed in 18 ADCP years of velocity profile data, where these events were clearly not the result of downward-propagating inertial internal waves. The jets had durations from about 1 to 8 days and were usually associated with interactions between similarly sized cyclones and anticyclones over the slope or with the interaction of an eddy with upper-slope topography. The jets are associated with potential vorticity anomalies and their inferred length scales indicate that the dynamics depart from simple geostrophic balances. Observed anomalous density gradients present during the jets seem to involve the tilting of the vertical axis of the center of rotation of one or more of the interacting eddies.
    publisherAmerican Meteorological Society
    titleSubsurface Jets in the Northwestern Gulf of Mexico
    typeJournal Paper
    journal volume39
    journal issue11
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/2009JPO4158.1
    journal fristpage2875
    journal lastpage2891
    treeJournal of Physical Oceanography:;2009:;Volume( 039 ):;issue: 011
    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