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    Modeling the 24-Hour Evolution of the Mean and Turbulent Structures of the Planetary Boundary Layer

    Source: Journal of the Atmospheric Sciences:;1978:;Volume( 035 ):;issue: 010::page 1861
    Author:
    André, J. C.
    ,
    De Moor, G.
    ,
    Lacarrère, P.
    ,
    du Vachat, R.
    DOI: 10.1175/1520-0469(1978)035<1861:MTHEOT>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: A high-order model is proposed for the study of the 24 h evolution of clear planetary boundary layers. The model includes the rate equations of correlations up to the third order, as required for an accurate description of daytime convective phenomena, but it also takes into account interactions between radiative transfer and turbulence in order to achieve a physically reasonable description of the nocturnal structure of the boundary layer. This numerical model is tested against the Wangara boundary layer data of Day 33 and Night 33?34 (Clarke et al., 197l). The computed daytime mean structure of the boundary layer compares favorably with the Wangara data, while the daytime turbulent structure, expressed in the framework of the convective similarity theory, is in particularly good quantitative agreement with a number of experimental and numerical data concerning convection in the boundary layer, with particular concern to the production of turbulence at the top of the mixed layer. The computed nocturnal mean structure is shown to be driven principally by radiative transfer and the mesoscale pressure gradient. It agrees with the observed nocturnal structure with the exception that the height of the turbulent surface layer is underestimated in the model, but it is shown that this height is very sensitive to the imposed boundary conditions. The computed nocturnal turbulent structure is explained on a qualitative basis by the interactions between shear generation of turbulence, thermal stratification and radiative phenomena. It is also shown that generation and vertical propagation of nocturnal turbulence, which are of primary interest for environmental purposes, are strongly influenced by turbulence and radiative transfer interactions.
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      Modeling the 24-Hour Evolution of the Mean and Turbulent Structures of the Planetary Boundary Layer

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4153474
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    • Journal of the Atmospheric Sciences

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    contributor authorAndré, J. C.
    contributor authorDe Moor, G.
    contributor authorLacarrère, P.
    contributor authordu Vachat, R.
    date accessioned2017-06-09T14:20:23Z
    date available2017-06-09T14:20:23Z
    date copyright1978/10/01
    date issued1978
    identifier issn0022-4928
    identifier otherams-17566.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4153474
    description abstractA high-order model is proposed for the study of the 24 h evolution of clear planetary boundary layers. The model includes the rate equations of correlations up to the third order, as required for an accurate description of daytime convective phenomena, but it also takes into account interactions between radiative transfer and turbulence in order to achieve a physically reasonable description of the nocturnal structure of the boundary layer. This numerical model is tested against the Wangara boundary layer data of Day 33 and Night 33?34 (Clarke et al., 197l). The computed daytime mean structure of the boundary layer compares favorably with the Wangara data, while the daytime turbulent structure, expressed in the framework of the convective similarity theory, is in particularly good quantitative agreement with a number of experimental and numerical data concerning convection in the boundary layer, with particular concern to the production of turbulence at the top of the mixed layer. The computed nocturnal mean structure is shown to be driven principally by radiative transfer and the mesoscale pressure gradient. It agrees with the observed nocturnal structure with the exception that the height of the turbulent surface layer is underestimated in the model, but it is shown that this height is very sensitive to the imposed boundary conditions. The computed nocturnal turbulent structure is explained on a qualitative basis by the interactions between shear generation of turbulence, thermal stratification and radiative phenomena. It is also shown that generation and vertical propagation of nocturnal turbulence, which are of primary interest for environmental purposes, are strongly influenced by turbulence and radiative transfer interactions.
    publisherAmerican Meteorological Society
    titleModeling the 24-Hour Evolution of the Mean and Turbulent Structures of the Planetary Boundary Layer
    typeJournal Paper
    journal volume35
    journal issue10
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/1520-0469(1978)035<1861:MTHEOT>2.0.CO;2
    journal fristpage1861
    journal lastpage1883
    treeJournal of the Atmospheric Sciences:;1978:;Volume( 035 ):;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
    yabeshDSpacePersian