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    A Theory for Buoyancy and Velocity Scales in Deep Moist Convection

    Source: Journal of the Atmospheric Sciences:;2009:;Volume( 066 ):;issue: 011::page 3449
    Author:
    Parodi, Antonio
    ,
    Emanuel, Kerry
    DOI: 10.1175/2009JAS3103.1
    Publisher: American Meteorological Society
    Abstract: Buoyancy and velocity scales for dry convection in statistical equilibrium were derived in the early twentieth century by Prandtl, but the scaling of convective velocity and buoyancy, as well as the fractional area coverage of convective clouds, is still unresolved for moist convection. In this paper, high-resolution simulations of an atmosphere in radiative?convective equilibrium are performed using the Weather Research and Forecasting (WRF) model, a three-dimensional, nonhydrostatic, convection-resolving, limited-area model. The velocity and buoyancy scales for moist convection in statistical equilibrium are characterized by prescribing different constant cooling rates to the system. It is shown that the spatiotemporal properties of deep moist convection and buoyancy and velocity scales at equilibrium depend on the terminal velocity of raindrops and a hypothesis is developed to explain this behavior. This hypothesis is evaluated and discussed in the context of the numerical results provided by the WRF model. The influence of domain size on radiative?convective equilibrium statistics is also assessed. The dependence of finescale spatiotemporal properties of convective structures on numerical and physical details is investigated.
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      A Theory for Buoyancy and Velocity Scales in Deep Moist Convection

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4210064
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    contributor authorParodi, Antonio
    contributor authorEmanuel, Kerry
    date accessioned2017-06-09T16:28:22Z
    date available2017-06-09T16:28:22Z
    date copyright2009/11/01
    date issued2009
    identifier issn0022-4928
    identifier otherams-68500.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4210064
    description abstractBuoyancy and velocity scales for dry convection in statistical equilibrium were derived in the early twentieth century by Prandtl, but the scaling of convective velocity and buoyancy, as well as the fractional area coverage of convective clouds, is still unresolved for moist convection. In this paper, high-resolution simulations of an atmosphere in radiative?convective equilibrium are performed using the Weather Research and Forecasting (WRF) model, a three-dimensional, nonhydrostatic, convection-resolving, limited-area model. The velocity and buoyancy scales for moist convection in statistical equilibrium are characterized by prescribing different constant cooling rates to the system. It is shown that the spatiotemporal properties of deep moist convection and buoyancy and velocity scales at equilibrium depend on the terminal velocity of raindrops and a hypothesis is developed to explain this behavior. This hypothesis is evaluated and discussed in the context of the numerical results provided by the WRF model. The influence of domain size on radiative?convective equilibrium statistics is also assessed. The dependence of finescale spatiotemporal properties of convective structures on numerical and physical details is investigated.
    publisherAmerican Meteorological Society
    titleA Theory for Buoyancy and Velocity Scales in Deep Moist Convection
    typeJournal Paper
    journal volume66
    journal issue11
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/2009JAS3103.1
    journal fristpage3449
    journal lastpage3463
    treeJournal of the Atmospheric Sciences:;2009:;Volume( 066 ):;issue: 011
    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