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    Baroclinic Waves with Parameterized Effects of Moisture Interpreted Using Rossby Wave Components

    Source: Journal of the Atmospheric Sciences:;2010:;Volume( 067 ):;issue: 009::page 2766
    Author:
    de Vries, Hylke
    ,
    Methven, John
    ,
    Frame, Thomas H. A.
    ,
    Hoskins, Brian J.
    DOI: 10.1175/2010JAS3410.1
    Publisher: American Meteorological Society
    Abstract: A theoretical framework is developed for the evolution of baroclinic waves with latent heat release parameterized in terms of vertical velocity. Both wave?conditional instability of the second kind (CISK) and large-scale rain approaches are included. The new quasigeostrophic framework covers evolution from general initial conditions on zonal flows with vertical shear, planetary vorticity gradient, a lower boundary, and a tropopause. The formulation is given completely in terms of potential vorticity, enabling the partition of perturbations into Rossby wave components, just as for the dry problem. Both modal and nonmodal development can be understood to a good approximation in terms of propagation and interaction between these components alone. The key change with moisture is that growing normal modes are described in terms of four counterpropagating Rossby wave (CRW) components rather than two. Moist CRWs exist above and below the maximum in latent heating, in addition to the upper- and lower-level CRWs of dry theory. Four classifications of baroclinic development are defined by quantifying the strength of interaction between the four components and identifying the dominant pairs, which range from essentially dry instability to instability in the limit of strong heating far from boundaries, with type-C cyclogenesis and diabatic Rossby waves being intermediate types. General initial conditions must also include passively advected residual PV, as in the dry problem.
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      Baroclinic Waves with Parameterized Effects of Moisture Interpreted Using Rossby Wave Components

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4211982
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    contributor authorde Vries, Hylke
    contributor authorMethven, John
    contributor authorFrame, Thomas H. A.
    contributor authorHoskins, Brian J.
    date accessioned2017-06-09T16:34:23Z
    date available2017-06-09T16:34:23Z
    date copyright2010/09/01
    date issued2010
    identifier issn0022-4928
    identifier otherams-70224.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4211982
    description abstractA theoretical framework is developed for the evolution of baroclinic waves with latent heat release parameterized in terms of vertical velocity. Both wave?conditional instability of the second kind (CISK) and large-scale rain approaches are included. The new quasigeostrophic framework covers evolution from general initial conditions on zonal flows with vertical shear, planetary vorticity gradient, a lower boundary, and a tropopause. The formulation is given completely in terms of potential vorticity, enabling the partition of perturbations into Rossby wave components, just as for the dry problem. Both modal and nonmodal development can be understood to a good approximation in terms of propagation and interaction between these components alone. The key change with moisture is that growing normal modes are described in terms of four counterpropagating Rossby wave (CRW) components rather than two. Moist CRWs exist above and below the maximum in latent heating, in addition to the upper- and lower-level CRWs of dry theory. Four classifications of baroclinic development are defined by quantifying the strength of interaction between the four components and identifying the dominant pairs, which range from essentially dry instability to instability in the limit of strong heating far from boundaries, with type-C cyclogenesis and diabatic Rossby waves being intermediate types. General initial conditions must also include passively advected residual PV, as in the dry problem.
    publisherAmerican Meteorological Society
    titleBaroclinic Waves with Parameterized Effects of Moisture Interpreted Using Rossby Wave Components
    typeJournal Paper
    journal volume67
    journal issue9
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/2010JAS3410.1
    journal fristpage2766
    journal lastpage2784
    treeJournal of the Atmospheric Sciences:;2010:;Volume( 067 ):;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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