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    Spontaneous Generation of Near-Inertial Waves by the Kuroshio Front

    Source: Journal of Physical Oceanography:;2015:;Volume( 045 ):;issue: 009::page 2381
    Author:
    Nagai, Takeyoshi
    ,
    Tandon, Amit
    ,
    Kunze, Eric
    ,
    Mahadevan, Amala
    DOI: 10.1175/JPO-D-14-0086.1
    Publisher: American Meteorological Society
    Abstract: hile near-inertial waves are known to be generated by atmospheric storms, recent observations in the Kuroshio Front find intense near-inertial internal-wave shear along sloping isopycnals, even during calm weather. Recent literature suggests that spontaneous generation of near-inertial waves by frontal instabilities could represent a major sink for the subinertial quasigeostrophic circulation. An unforced three-dimensional 1-km-resolution model, initialized with the observed cross-Kuroshio structure, is used to explore this mechanism. After several weeks, the model exhibits growth of 10?100-km-scale frontal meanders, accompanied by O(10) mW m?2 spontaneous generation of near-inertial waves associated with readjustment of submesoscale fronts forced out of balance by mesoscale confluent flows. These waves have properties resembling those in the observations. However, they are reabsorbed into the model Kuroshio Front with no more than 15% dissipating or radiating away. Thus, spontaneous generation of near-inertial waves represents a redistribution of quasigeostrophic energy rather than a significant sink.
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      Spontaneous Generation of Near-Inertial Waves by the Kuroshio Front

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    contributor authorNagai, Takeyoshi
    contributor authorTandon, Amit
    contributor authorKunze, Eric
    contributor authorMahadevan, Amala
    date accessioned2017-06-09T17:20:50Z
    date available2017-06-09T17:20:50Z
    date copyright2015/09/01
    date issued2015
    identifier issn0022-3670
    identifier otherams-83585.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4226826
    description abstracthile near-inertial waves are known to be generated by atmospheric storms, recent observations in the Kuroshio Front find intense near-inertial internal-wave shear along sloping isopycnals, even during calm weather. Recent literature suggests that spontaneous generation of near-inertial waves by frontal instabilities could represent a major sink for the subinertial quasigeostrophic circulation. An unforced three-dimensional 1-km-resolution model, initialized with the observed cross-Kuroshio structure, is used to explore this mechanism. After several weeks, the model exhibits growth of 10?100-km-scale frontal meanders, accompanied by O(10) mW m?2 spontaneous generation of near-inertial waves associated with readjustment of submesoscale fronts forced out of balance by mesoscale confluent flows. These waves have properties resembling those in the observations. However, they are reabsorbed into the model Kuroshio Front with no more than 15% dissipating or radiating away. Thus, spontaneous generation of near-inertial waves represents a redistribution of quasigeostrophic energy rather than a significant sink.
    publisherAmerican Meteorological Society
    titleSpontaneous Generation of Near-Inertial Waves by the Kuroshio Front
    typeJournal Paper
    journal volume45
    journal issue9
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/JPO-D-14-0086.1
    journal fristpage2381
    journal lastpage2406
    treeJournal of Physical Oceanography:;2015:;Volume( 045 ):;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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