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    Cumulus Parameterization and CISK

    Source: Journal of the Atmospheric Sciences:;1973:;Volume( 030 ):;issue: 004::page 582
    Author:
    Israeli, M.
    ,
    Sarachik, E. S.
    DOI: 10.1175/1520-0469(1973)030<0582:CPAC>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Arakawa's recent parameterization of the effects of a cumulus ensemble on the large-scale environment is applied to the problem of conditional instability of the second kind (CISK). In particular, Charney's linear, two-level, line-symmetry CISK model of the ITCZ is re-examined using a simplified non-entraining cloud version of the Arakawa scheme. It is found that the growth rate is maximum, in fact infinite, at some reasonable mesoscale rather than at cumulus scale as is characteristic of Charney's solution. A more accurate semi-analytic model of CISK is considered and it is found that a separable, line-symmetric CISK solution is always possible under very general conditions. In both the two-level and semi-analytic models of CISK, it is proved that a necessary condition for the existence of a growing solution is that the mass flux into the clouds exceeds the Ekman pumping out of the boundary layer, or equivalently, that the air between the clouds must subside and therefore heat the environment by adiabatic compression.
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      Cumulus Parameterization and CISK

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4152140
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    contributor authorIsraeli, M.
    contributor authorSarachik, E. S.
    date accessioned2017-06-09T14:16:55Z
    date available2017-06-09T14:16:55Z
    date copyright1973/05/01
    date issued1973
    identifier issn0022-4928
    identifier otherams-16365.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4152140
    description abstractArakawa's recent parameterization of the effects of a cumulus ensemble on the large-scale environment is applied to the problem of conditional instability of the second kind (CISK). In particular, Charney's linear, two-level, line-symmetry CISK model of the ITCZ is re-examined using a simplified non-entraining cloud version of the Arakawa scheme. It is found that the growth rate is maximum, in fact infinite, at some reasonable mesoscale rather than at cumulus scale as is characteristic of Charney's solution. A more accurate semi-analytic model of CISK is considered and it is found that a separable, line-symmetric CISK solution is always possible under very general conditions. In both the two-level and semi-analytic models of CISK, it is proved that a necessary condition for the existence of a growing solution is that the mass flux into the clouds exceeds the Ekman pumping out of the boundary layer, or equivalently, that the air between the clouds must subside and therefore heat the environment by adiabatic compression.
    publisherAmerican Meteorological Society
    titleCumulus Parameterization and CISK
    typeJournal Paper
    journal volume30
    journal issue4
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/1520-0469(1973)030<0582:CPAC>2.0.CO;2
    journal fristpage582
    journal lastpage589
    treeJournal of the Atmospheric Sciences:;1973:;Volume( 030 ):;issue: 004
    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