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    Formation of Low Potential Vorticity over the Deep Pacific

    Source: Journal of Physical Oceanography:;2002:;Volume( 032 ):;issue: 006::page 1811
    Author:
    Roussenov, Vassil
    ,
    Williams, Richard G.
    ,
    O'Dwyer, Jane
    DOI: 10.1175/1520-0485(2002)032<1811:FOLPVO>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Low potential vorticity extends over the deep waters of the North Pacific and, possibly, the bottom waters of the North Atlantic. Isopycnic model integrations are conducted to investigate how these potential vorticity distributions are controlled, first, for an idealized double-hemisphere and, second, for the Pacific with realistic topography. Dense water is released from a southern, high-latitude source and circulates over the domain with diapycnic mixing gradually reducing its stratification. The potential vorticity contrast is large over the Southern Hemisphere, but weak over the Northern Hemisphere where the meridional changes in planetary vorticity and layer thickness oppose each other. Including an active eddy field inhibits the grounding of dense water, which increases the potential vorticity contrast in the overlying layer. Incorporating realistic topography leads to the dense fluid spreading via deep channels with tight recirculations and jets bifurcating. The experiments suggest that extensive regions of low potential vorticity are formed whenever there is both enhanced bottom mixing and a basin is filled by a single water mass entering from across the equator.
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      Formation of Low Potential Vorticity over the Deep Pacific

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4166963
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    contributor authorRoussenov, Vassil
    contributor authorWilliams, Richard G.
    contributor authorO'Dwyer, Jane
    date accessioned2017-06-09T14:55:19Z
    date available2017-06-09T14:55:19Z
    date copyright2002/06/01
    date issued2002
    identifier issn0022-3670
    identifier otherams-29706.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4166963
    description abstractLow potential vorticity extends over the deep waters of the North Pacific and, possibly, the bottom waters of the North Atlantic. Isopycnic model integrations are conducted to investigate how these potential vorticity distributions are controlled, first, for an idealized double-hemisphere and, second, for the Pacific with realistic topography. Dense water is released from a southern, high-latitude source and circulates over the domain with diapycnic mixing gradually reducing its stratification. The potential vorticity contrast is large over the Southern Hemisphere, but weak over the Northern Hemisphere where the meridional changes in planetary vorticity and layer thickness oppose each other. Including an active eddy field inhibits the grounding of dense water, which increases the potential vorticity contrast in the overlying layer. Incorporating realistic topography leads to the dense fluid spreading via deep channels with tight recirculations and jets bifurcating. The experiments suggest that extensive regions of low potential vorticity are formed whenever there is both enhanced bottom mixing and a basin is filled by a single water mass entering from across the equator.
    publisherAmerican Meteorological Society
    titleFormation of Low Potential Vorticity over the Deep Pacific
    typeJournal Paper
    journal volume32
    journal issue6
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/1520-0485(2002)032<1811:FOLPVO>2.0.CO;2
    journal fristpage1811
    journal lastpage1823
    treeJournal of Physical Oceanography:;2002:;Volume( 032 ):;issue: 006
    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