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    Study of the Dynamics of the Intertropical Convergence Zone with a Symmetric Version of the GLAS Climate Model

    Source: Journal of the Atmospheric Sciences:;1984:;Volume( 041 ):;issue: 001::page 5
    Author:
    Goswami, B. N.
    ,
    Shukla, J.
    ,
    Schneider, E. K.
    ,
    Sud, Y. C.
    DOI: 10.1175/1520-0469(1984)041<0005:SOTDOT>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The results of some calculations with a zonally symmetric version of the Goddard Laboratory of Atmospheric Sciences (GLAS) climate model are described. The model was first used to study the nature of symmetric circulation in response to various zonally-averaged latent heating fields based on observations. Three experiments with distribution of Intent beating corresponding to the equinox condition, Northern Hemisphere summer condition and south Asian monsoon condition showed reasonable similarity to the observed distribution of surface easterlies and westerlies and the subtropical westerly jets. In the south Asian monsoon experiment, surface westerlies as well as the upper-level easterly jet in the subtropics of the Northern Hemisphere were found. The strength of the subtropical westerly jet increased with decrease in the vertical eddy viscosity. Additional experiments were carried out in which the model was allowed to determine its own latent beat sources and the results were analyzed to examine the interaction of CISK and the imposed SST in determining the position, structure and transient behavior of the ITCZ. In the small number of cases considered, the model equilibrium was found to be independent of initial conditions, with a narrow ITCZ occurring over the SST maximum. After the equilibrium solution was established, the specfied SST distribution was altered. It was found that the initial ITCZ persisted for a long time (weeks to months); however, finally a new ITCZ became established at the location of the new SST maximum. Initially its development was slow, but was followed by a rapid intensification toward the end. The time needed for the establishment of the ITCZ at its new position depended upon the latitude of maximum SST and the magnitude of the SST anomaly. The calculations also indicated the properties of some of the parameterizations employed in the climate model, in particular, the moist convection and the effects of clouds on radiative cooling.
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      Study of the Dynamics of the Intertropical Convergence Zone with a Symmetric Version of the GLAS Climate Model

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4154739
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    • Journal of the Atmospheric Sciences

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    contributor authorGoswami, B. N.
    contributor authorShukla, J.
    contributor authorSchneider, E. K.
    contributor authorSud, Y. C.
    date accessioned2017-06-09T14:24:22Z
    date available2017-06-09T14:24:22Z
    date copyright1984/01/01
    date issued1984
    identifier issn0022-4928
    identifier otherams-18704.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4154739
    description abstractThe results of some calculations with a zonally symmetric version of the Goddard Laboratory of Atmospheric Sciences (GLAS) climate model are described. The model was first used to study the nature of symmetric circulation in response to various zonally-averaged latent heating fields based on observations. Three experiments with distribution of Intent beating corresponding to the equinox condition, Northern Hemisphere summer condition and south Asian monsoon condition showed reasonable similarity to the observed distribution of surface easterlies and westerlies and the subtropical westerly jets. In the south Asian monsoon experiment, surface westerlies as well as the upper-level easterly jet in the subtropics of the Northern Hemisphere were found. The strength of the subtropical westerly jet increased with decrease in the vertical eddy viscosity. Additional experiments were carried out in which the model was allowed to determine its own latent beat sources and the results were analyzed to examine the interaction of CISK and the imposed SST in determining the position, structure and transient behavior of the ITCZ. In the small number of cases considered, the model equilibrium was found to be independent of initial conditions, with a narrow ITCZ occurring over the SST maximum. After the equilibrium solution was established, the specfied SST distribution was altered. It was found that the initial ITCZ persisted for a long time (weeks to months); however, finally a new ITCZ became established at the location of the new SST maximum. Initially its development was slow, but was followed by a rapid intensification toward the end. The time needed for the establishment of the ITCZ at its new position depended upon the latitude of maximum SST and the magnitude of the SST anomaly. The calculations also indicated the properties of some of the parameterizations employed in the climate model, in particular, the moist convection and the effects of clouds on radiative cooling.
    publisherAmerican Meteorological Society
    titleStudy of the Dynamics of the Intertropical Convergence Zone with a Symmetric Version of the GLAS Climate Model
    typeJournal Paper
    journal volume41
    journal issue1
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/1520-0469(1984)041<0005:SOTDOT>2.0.CO;2
    journal fristpage5
    journal lastpage19
    treeJournal of the Atmospheric Sciences:;1984:;Volume( 041 ):;issue: 001
    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