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    Observations of the Transfer of Energy and Momentum to the Oceanic Surface Boundary Layer beneath Breaking Waves

    Source: Journal of Physical Oceanography:;2016:;Volume( 046 ):;issue: 006::page 1823
    Author:
    Scully, Malcolm E.
    ,
    Trowbridge, John H.
    ,
    Fisher, Alexander W.
    DOI: 10.1175/JPO-D-15-0165.1
    Publisher: American Meteorological Society
    Abstract: easurements just beneath the ocean surface demonstrate that the primary mechanism by which energy from breaking waves is transmitted into the water column is through the work done by the covariance of turbulent pressure and velocity fluctuations. The convergence in the vertical transport of turbulent kinetic energy (TKE) balances the dissipation rate of TKE at first order and is nearly an order of magnitude greater than the sum of the integrated Eulerian and Stokes shear production. The measured TKE transport is consistent with a simple conceptual model that assumes roughly half of the surface flux of TKE by wave breaking is transmitted to depths greater than the significant wave height. During conditions when breaking waves are inferred, the direction of momentum flux is more aligned with the direction of wave propagation than with the wind direction. Both the energy and momentum fluxes occur at frequencies much lower than the wave band, consistent with the time scales associated with wave breaking. The largest instantaneous values of momentum flux are associated with strong downward vertical velocity perturbations, in contrast to the pressure work, which is associated with strong drops in pressure and upward vertical velocity perturbations.
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      Observations of the Transfer of Energy and Momentum to the Oceanic Surface Boundary Layer beneath Breaking Waves

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    contributor authorScully, Malcolm E.
    contributor authorTrowbridge, John H.
    contributor authorFisher, Alexander W.
    date accessioned2017-06-09T17:21:47Z
    date available2017-06-09T17:21:47Z
    date copyright2016/06/01
    date issued2016
    identifier issn0022-3670
    identifier otherams-83826.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4227094
    description abstracteasurements just beneath the ocean surface demonstrate that the primary mechanism by which energy from breaking waves is transmitted into the water column is through the work done by the covariance of turbulent pressure and velocity fluctuations. The convergence in the vertical transport of turbulent kinetic energy (TKE) balances the dissipation rate of TKE at first order and is nearly an order of magnitude greater than the sum of the integrated Eulerian and Stokes shear production. The measured TKE transport is consistent with a simple conceptual model that assumes roughly half of the surface flux of TKE by wave breaking is transmitted to depths greater than the significant wave height. During conditions when breaking waves are inferred, the direction of momentum flux is more aligned with the direction of wave propagation than with the wind direction. Both the energy and momentum fluxes occur at frequencies much lower than the wave band, consistent with the time scales associated with wave breaking. The largest instantaneous values of momentum flux are associated with strong downward vertical velocity perturbations, in contrast to the pressure work, which is associated with strong drops in pressure and upward vertical velocity perturbations.
    publisherAmerican Meteorological Society
    titleObservations of the Transfer of Energy and Momentum to the Oceanic Surface Boundary Layer beneath Breaking Waves
    typeJournal Paper
    journal volume46
    journal issue6
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/JPO-D-15-0165.1
    journal fristpage1823
    journal lastpage1837
    treeJournal of Physical Oceanography:;2016:;Volume( 046 ):;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