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    Advective Time Lags in Box Models

    Source: Journal of Physical Oceanography:;2001:;Volume( 031 ):;issue: 007::page 1828
    Author:
    Kurtze, Douglas A.
    ,
    Restrepo, Juan M.
    DOI: 10.1175/1520-0485(2001)031<1828:ATLIBM>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: A box model of the thermohaline circulation with mixed boundary conditions in which advective processes are incorporated via an explicit time delay mechanism is considered. The pipes that connect the subtropical and subpolar boxes have a finite volume and do not interact with the atmosphere or with the rest of the ocean except for channeling fluxes between the subtropical and subpolar regions. The configuration can be reduced to a two-box model, which, unlike the traditional Stommel model, incorporates finite-time advective processes. It is found that including a time lag leaves the haline dominant steady state stable, but the thermally dominant steady state, which is stable in Stommel's model, can have an oscillatory instability. However, this instability does not lead to sustained oscillations. Instead, it simply makes the circulation cross over to the stable haline dominant pattern. Even in part of the parameter range for which the thermally dominant state remains linearly stable, the time lag leads to a finite-amplitude instability so that a relatively small?but not infinitesimal?perturbation about the thermal state can switch the circulation to the haline state.
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      Advective Time Lags in Box Models

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4166695
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    • Journal of Physical Oceanography

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    contributor authorKurtze, Douglas A.
    contributor authorRestrepo, Juan M.
    date accessioned2017-06-09T14:54:39Z
    date available2017-06-09T14:54:39Z
    date copyright2001/07/01
    date issued2001
    identifier issn0022-3670
    identifier otherams-29465.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4166695
    description abstractA box model of the thermohaline circulation with mixed boundary conditions in which advective processes are incorporated via an explicit time delay mechanism is considered. The pipes that connect the subtropical and subpolar boxes have a finite volume and do not interact with the atmosphere or with the rest of the ocean except for channeling fluxes between the subtropical and subpolar regions. The configuration can be reduced to a two-box model, which, unlike the traditional Stommel model, incorporates finite-time advective processes. It is found that including a time lag leaves the haline dominant steady state stable, but the thermally dominant steady state, which is stable in Stommel's model, can have an oscillatory instability. However, this instability does not lead to sustained oscillations. Instead, it simply makes the circulation cross over to the stable haline dominant pattern. Even in part of the parameter range for which the thermally dominant state remains linearly stable, the time lag leads to a finite-amplitude instability so that a relatively small?but not infinitesimal?perturbation about the thermal state can switch the circulation to the haline state.
    publisherAmerican Meteorological Society
    titleAdvective Time Lags in Box Models
    typeJournal Paper
    journal volume31
    journal issue7
    journal titleJournal of Physical Oceanography
    identifier doi10.1175/1520-0485(2001)031<1828:ATLIBM>2.0.CO;2
    journal fristpage1828
    journal lastpage1842
    treeJournal of Physical Oceanography:;2001:;Volume( 031 ):;issue: 007
    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