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    Rossby Waves and Jets in Two-Dimensional Decaying Turbulence on a Rotating Sphere

    Source: Journal of the Atmospheric Sciences:;2007:;Volume( 064 ):;issue: 012::page 4246
    Author:
    Hayashi, Yoshi-Yuki
    ,
    Nishizawa, Seiya
    ,
    Takehiro, Shin-ichi
    ,
    Yamada, Michio
    ,
    Ishioka, Keiichi
    ,
    Yoden, Shigeo
    DOI: 10.1175/2007JAS2209.1
    Publisher: American Meteorological Society
    Abstract: Jet formation in decaying two-dimensional turbulence on a rotating sphere is reviewed from the viewpoint of Rossby waves. A series of calculations are performed to confirm the behavior of zonal mean flow generation on the parameter space of the rotation rate Ω and Froude number Fr. When the flow is nondivergent and Ω is large, intense easterly circumpolar jets tend to emerge in addition to the appearance of a banded structure of zonal mean flows with alternating flow directions. When the system allows surface elevation, circumpolar jets disappear and an equatorial easterly jet emerges with increasing Fr. The appearance of the intense easterly jets can be understood by the angular-momentum transport associated with the generation, propagation, and absorption of Rossby waves. When the flow is nondivergent, long Rossby waves tend to be absorbed near the poles. In contrast, when Fr is large, Rossby waves can hardly propagate poleward and tend to be absorbed near the equator.
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      Rossby Waves and Jets in Two-Dimensional Decaying Turbulence on a Rotating Sphere

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4206675
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    contributor authorHayashi, Yoshi-Yuki
    contributor authorNishizawa, Seiya
    contributor authorTakehiro, Shin-ichi
    contributor authorYamada, Michio
    contributor authorIshioka, Keiichi
    contributor authorYoden, Shigeo
    date accessioned2017-06-09T16:18:31Z
    date available2017-06-09T16:18:31Z
    date copyright2007/12/01
    date issued2007
    identifier issn0022-4928
    identifier otherams-65449.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4206675
    description abstractJet formation in decaying two-dimensional turbulence on a rotating sphere is reviewed from the viewpoint of Rossby waves. A series of calculations are performed to confirm the behavior of zonal mean flow generation on the parameter space of the rotation rate Ω and Froude number Fr. When the flow is nondivergent and Ω is large, intense easterly circumpolar jets tend to emerge in addition to the appearance of a banded structure of zonal mean flows with alternating flow directions. When the system allows surface elevation, circumpolar jets disappear and an equatorial easterly jet emerges with increasing Fr. The appearance of the intense easterly jets can be understood by the angular-momentum transport associated with the generation, propagation, and absorption of Rossby waves. When the flow is nondivergent, long Rossby waves tend to be absorbed near the poles. In contrast, when Fr is large, Rossby waves can hardly propagate poleward and tend to be absorbed near the equator.
    publisherAmerican Meteorological Society
    titleRossby Waves and Jets in Two-Dimensional Decaying Turbulence on a Rotating Sphere
    typeJournal Paper
    journal volume64
    journal issue12
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/2007JAS2209.1
    journal fristpage4246
    journal lastpage4269
    treeJournal of the Atmospheric Sciences:;2007:;Volume( 064 ):;issue: 012
    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