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    Supplement to Resonant Rossby Wave Triads and the Swinging Spring

    Source: Bulletin of the American Meteorological Society:;2003:;volume( 084 ):;issue: 005::page 616
    Author:
    Lynch, Peter
    DOI: 10.1175/BAMS-84-5-Lynch
    Publisher: American Meteorological Society
    Abstract: The wave solutions discovered by Rossby are of fundamental importance for atmospheric dynamics. The nonlinear interactions between these waves determine the primary characteristics of the energy spectrum. These interactions take place between triplets of waves known as ?resonant triads? and, for small amplitude, they are described by the three-wave equations. These same equations also govern the dynamics of a simple mechanical system, the elastic pendulum or swinging spring. This equivalence allows us to deduce properties, not otherwise evident, of resonant triads from the behavior of the mechanical system. In particular, the characteristic stepwise precession of the swing plane, so obvious from observation of the physical spring pendulum, is also found for the Rossby triads. This phenomenon has not been previously noted and is an example of the insight coming from the mathematical equivalence of the two systems. The implications of the precession for predictability of atmospheric motions are considered. The pattern of breakdown of unstable Rossby waves is very sensitive to unobservable details of the perturbations, making accurate prediction very difficult.
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      Supplement to Resonant Rossby Wave Triads and the Swinging Spring

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    contributor authorLynch, Peter
    date accessioned2017-06-09T16:42:16Z
    date available2017-06-09T16:42:16Z
    date copyright2003/05/01
    date issued2003
    identifier issn0003-0007
    identifier otherams-72601.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4214621
    description abstractThe wave solutions discovered by Rossby are of fundamental importance for atmospheric dynamics. The nonlinear interactions between these waves determine the primary characteristics of the energy spectrum. These interactions take place between triplets of waves known as ?resonant triads? and, for small amplitude, they are described by the three-wave equations. These same equations also govern the dynamics of a simple mechanical system, the elastic pendulum or swinging spring. This equivalence allows us to deduce properties, not otherwise evident, of resonant triads from the behavior of the mechanical system. In particular, the characteristic stepwise precession of the swing plane, so obvious from observation of the physical spring pendulum, is also found for the Rossby triads. This phenomenon has not been previously noted and is an example of the insight coming from the mathematical equivalence of the two systems. The implications of the precession for predictability of atmospheric motions are considered. The pattern of breakdown of unstable Rossby waves is very sensitive to unobservable details of the perturbations, making accurate prediction very difficult.
    publisherAmerican Meteorological Society
    titleSupplement to Resonant Rossby Wave Triads and the Swinging Spring
    typeJournal Paper
    journal volume84
    journal issue5
    journal titleBulletin of the American Meteorological Society
    identifier doi10.1175/BAMS-84-5-Lynch
    journal fristpage616
    journal lastpage616
    treeBulletin of the American Meteorological Society:;2003:;volume( 084 ):;issue: 005
    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