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    Linear and Nonlinear Baroclinic Instability of the Northern Hemisphere Winter Zonal Flow

    Source: Journal of the Atmospheric Sciences:;1981:;Volume( 038 ):;issue: 010::page 2121
    Author:
    Wyatt, Lucy R.
    DOI: 10.1175/1520-0469(1981)038<2121:LANBIO>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: This study was carried out to investigate the extent to which the results of linear ?- or f-plane solutions for baroclinic instability of simple flows can be applied to the Northern Hemisphere winter, zonal mean zonal flow. In particular, the idea of baroclinic adjustment postulated by Stone (1978) in response to a parameterization of poleward heat flux presented by Held (1978) and based on Charney?s ?-plane model is considered. This parameterization is very dependent on a simple formulation for the depth scale of baroclinic waves and it is shown here that this is not an appropriate scaling for many of the modes under consideration. The baroclinic adjustment hypothesis is examined by considering first the linear stability of a variety of atmospheres, then the normal modes are integrated using a spectral primitive equation model and their nonlinear development is found to depend on the process of barotropic decay which is not a feature of the simple theoretical models. The time-averaged wave structure, as measured by Eliassen-Palm flux divergence patterns (Edmon et al., 1980), shows a good agreement with climatological patterns.
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      Linear and Nonlinear Baroclinic Instability of the Northern Hemisphere Winter Zonal Flow

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4154189
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    contributor authorWyatt, Lucy R.
    date accessioned2017-06-09T14:22:34Z
    date available2017-06-09T14:22:34Z
    date copyright1981/10/01
    date issued1981
    identifier issn0022-4928
    identifier otherams-18209.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4154189
    description abstractThis study was carried out to investigate the extent to which the results of linear ?- or f-plane solutions for baroclinic instability of simple flows can be applied to the Northern Hemisphere winter, zonal mean zonal flow. In particular, the idea of baroclinic adjustment postulated by Stone (1978) in response to a parameterization of poleward heat flux presented by Held (1978) and based on Charney?s ?-plane model is considered. This parameterization is very dependent on a simple formulation for the depth scale of baroclinic waves and it is shown here that this is not an appropriate scaling for many of the modes under consideration. The baroclinic adjustment hypothesis is examined by considering first the linear stability of a variety of atmospheres, then the normal modes are integrated using a spectral primitive equation model and their nonlinear development is found to depend on the process of barotropic decay which is not a feature of the simple theoretical models. The time-averaged wave structure, as measured by Eliassen-Palm flux divergence patterns (Edmon et al., 1980), shows a good agreement with climatological patterns.
    publisherAmerican Meteorological Society
    titleLinear and Nonlinear Baroclinic Instability of the Northern Hemisphere Winter Zonal Flow
    typeJournal Paper
    journal volume38
    journal issue10
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/1520-0469(1981)038<2121:LANBIO>2.0.CO;2
    journal fristpage2121
    journal lastpage2129
    treeJournal of the Atmospheric Sciences:;1981:;Volume( 038 ):;issue: 010
    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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