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    Microstructure Estimates of Turbulent Salinity Flux and the Dissipation Spectrum of Salinity

    Source: Journal of Physical Oceanography:;2002:;Volume( 032 ):;issue: 008::page 2312
    Author:
    Nash, Jonathan D.
    ,
    Moum, James N.
    DOI: 10.1175/1520-0485(2002)032<2312:MEOTSF>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Direct determination of the irreversible turbulent flux of salinity in the ocean has not been possible because of the complexity of measuring salinity on the smallest scales over which it mixes. Presented is an analysis of turbulent salinity microstructure from measurements using a combined fast-conductivity/temperature probe on a slowly falling vertical microstructure profiler. Four hundred patches of ocean turbulence were selected for the analysis. Highly resolved spectra of salinity gradient ?Sz exhibit an approximate k+1 dependence in the viscous?convective subrange, followed by a roll-off in the viscous?diffusive subrange, as suggested by Batchelor, and permit the dissipation rate of salinity variance ?S to be determined. Estimates of irreversible salinity flux from measurements of the dissipation scales (from ?S, following Osborn and Cox) are compared to those from the correlation method (?w?S??), from TKE dissipation measurements (following Osborn), and to the turbulent heat flux. It is found that the ratio of haline to thermal turbulent diffusivities, dx = KS/KT = ?S/?T(dT/dS)2 is 0.6 < dx < 1.1.
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      Microstructure Estimates of Turbulent Salinity Flux and the Dissipation Spectrum of Salinity

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4166985
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    • Journal of Physical Oceanography

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    contributor authorNash, Jonathan D.
    contributor authorMoum, James N.
    date accessioned2017-06-09T14:55:23Z
    date available2017-06-09T14:55:23Z
    date copyright2002/08/01
    date issued2002
    identifier issn0022-3670
    identifier otherams-29726.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4166985
    description abstractDirect determination of the irreversible turbulent flux of salinity in the ocean has not been possible because of the complexity of measuring salinity on the smallest scales over which it mixes. Presented is an analysis of turbulent salinity microstructure from measurements using a combined fast-conductivity/temperature probe on a slowly falling vertical microstructure profiler. Four hundred patches of ocean turbulence were selected for the analysis. Highly resolved spectra of salinity gradient ?Sz exhibit an approximate k+1 dependence in the viscous?convective subrange, followed by a roll-off in the viscous?diffusive subrange, as suggested by Batchelor, and permit the dissipation rate of salinity variance ?S to be determined. Estimates of irreversible salinity flux from measurements of the dissipation scales (from ?S, following Osborn and Cox) are compared to those from the correlation method (?w?S??), from TKE dissipation measurements (following Osborn), and to the turbulent heat flux. It is found that the ratio of haline to thermal turbulent diffusivities, dx = KS/KT = ?S/?T(dT/dS)2 is 0.6 < dx < 1.1.
    publisherAmerican Meteorological Society
    titleMicrostructure Estimates of Turbulent Salinity Flux and the Dissipation Spectrum of Salinity
    typeJournal Paper
    journal volume32
    journal issue8
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/1520-0485(2002)032<2312:MEOTSF>2.0.CO;2
    journal fristpage2312
    journal lastpage2333
    treeJournal of Physical Oceanography:;2002:;Volume( 032 ):;issue: 008
    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