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    Implications of Ocean Bottom Reflection for Internal Wave Spectra and Mixing

    Source: Journal of Physical Oceanography:;1985:;Volume( 015 ):;issue: 009::page 1145
    Author:
    Eriksen, Charles C.
    DOI: 10.1175/1520-0485(1985)015<1145:IOOBRF>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: A linear internal wave model for reflection off a sloping bottom applied to a field of horizontally isotropic waves typical of the deep ocean leads to a strongly perturbed frequency-vertical wavenumber energy spectrum. The spectrum is dominated by a nonintegrable singularity at the internal wave critical frequency characteristic of the environment and bottom slope. An observational requirement that the internal wave spectrum near the bottom relax to the open deep-ocean level and shape within a few hundred meters vertically implies a flux imbalance normal to the boundary. The flux that must be redistributed over the internal wave spectrum, or lost from it, amounts to O(10?2 W m?2), larger than for most other energy transfer mechanisms estimated for internal waves. A small fraction of this flux imbalance applied to mixing can account for a basin-averaged effective vertical diffusivity of 10?4 m2 s?1. Bottom reflection represents not only a likely and powerful sink for internal wave energy, but a mechanism that may be important to the oceanic general circulation through its contribution to mixing.
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      Implications of Ocean Bottom Reflection for Internal Wave Spectra and Mixing

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4163813
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    contributor authorEriksen, Charles C.
    date accessioned2017-06-09T14:47:34Z
    date available2017-06-09T14:47:34Z
    date copyright1985/09/01
    date issued1985
    identifier issn0022-3670
    identifier otherams-26871.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4163813
    description abstractA linear internal wave model for reflection off a sloping bottom applied to a field of horizontally isotropic waves typical of the deep ocean leads to a strongly perturbed frequency-vertical wavenumber energy spectrum. The spectrum is dominated by a nonintegrable singularity at the internal wave critical frequency characteristic of the environment and bottom slope. An observational requirement that the internal wave spectrum near the bottom relax to the open deep-ocean level and shape within a few hundred meters vertically implies a flux imbalance normal to the boundary. The flux that must be redistributed over the internal wave spectrum, or lost from it, amounts to O(10?2 W m?2), larger than for most other energy transfer mechanisms estimated for internal waves. A small fraction of this flux imbalance applied to mixing can account for a basin-averaged effective vertical diffusivity of 10?4 m2 s?1. Bottom reflection represents not only a likely and powerful sink for internal wave energy, but a mechanism that may be important to the oceanic general circulation through its contribution to mixing.
    publisherAmerican Meteorological Society
    titleImplications of Ocean Bottom Reflection for Internal Wave Spectra and Mixing
    typeJournal Paper
    journal volume15
    journal issue9
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/1520-0485(1985)015<1145:IOOBRF>2.0.CO;2
    journal fristpage1145
    journal lastpage1156
    treeJournal of Physical Oceanography:;1985:;Volume( 015 ):;issue: 009
    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
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