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    A Linear Thermohaline Oscillator Driven by Stochastic Atmospheric Forcing

    Source: Journal of Climate:;1995:;volume( 008 ):;issue: 010::page 2440
    Author:
    Griffies, Stephen M.
    ,
    Tziperman, Eli
    DOI: 10.1175/1520-0442(1995)008<2440:ALTODB>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The interdecadal variability of a stochastically forced four-box model of the oceanic meridional thermohaline circulation (THC) is described and compared to the THC variability in the coupled ocean?atmosphere GCM of Delworth, Manabe, and Stouffer. The box model is placed in a linearly stable thermally dominant mean state under mixed boundary conditions. A linear stability analysis of this state reveals one damped oscillatory THC mode in addition to purely damped modes. The variability of the model under a moderate amount of stochastic forcing, meant to emulate the random variability of the atmosphere affecting the coupled model's interdecadal THC variability, is studied. A linear interpretation, in which the damped oscillatory mode is of primary importance, is sufficient for understanding the mechanism accounting for the stochastically forced variability. Direct comparison of the variability in the box model and coupled GCM reveals common qualitative aspects. Such a comparison supports, although does not verify, the hypothesis that the coupled model's THC variability can be interpreted as the result of atmospheric weather exciting a linear damped oscillatory THC mode.
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      A Linear Thermohaline Oscillator Driven by Stochastic Atmospheric Forcing

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4183267
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    contributor authorGriffies, Stephen M.
    contributor authorTziperman, Eli
    date accessioned2017-06-09T15:27:40Z
    date available2017-06-09T15:27:40Z
    date copyright1995/10/01
    date issued1995
    identifier issn0894-8755
    identifier otherams-4438.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4183267
    description abstractThe interdecadal variability of a stochastically forced four-box model of the oceanic meridional thermohaline circulation (THC) is described and compared to the THC variability in the coupled ocean?atmosphere GCM of Delworth, Manabe, and Stouffer. The box model is placed in a linearly stable thermally dominant mean state under mixed boundary conditions. A linear stability analysis of this state reveals one damped oscillatory THC mode in addition to purely damped modes. The variability of the model under a moderate amount of stochastic forcing, meant to emulate the random variability of the atmosphere affecting the coupled model's interdecadal THC variability, is studied. A linear interpretation, in which the damped oscillatory mode is of primary importance, is sufficient for understanding the mechanism accounting for the stochastically forced variability. Direct comparison of the variability in the box model and coupled GCM reveals common qualitative aspects. Such a comparison supports, although does not verify, the hypothesis that the coupled model's THC variability can be interpreted as the result of atmospheric weather exciting a linear damped oscillatory THC mode.
    publisherAmerican Meteorological Society
    titleA Linear Thermohaline Oscillator Driven by Stochastic Atmospheric Forcing
    typeJournal Paper
    journal volume8
    journal issue10
    journal titleJournal of Climate
    identifier doi10.1175/1520-0442(1995)008<2440:ALTODB>2.0.CO;2
    journal fristpage2440
    journal lastpage2453
    treeJournal of Climate:;1995:;volume( 008 ):;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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