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    Lamination Frequencies as a Diagnostic for Horizontal Mixing in a 3D Transport Model

    Source: Journal of the Atmospheric Sciences:;2000:;Volume( 057 ):;issue: 002::page 247
    Author:
    Weaver, Clark J.
    ,
    Douglass, Anne R.
    ,
    Rood, Richard B.
    DOI: 10.1175/1520-0469(2000)057<0247:LFAADF>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Ozone simulations are performed in an attempt to simulate laminar events with the frequency observed in balloon ozone sondes. The winds are taken from the Goddard Earth Observing System Data Assimilation System (GEOS DAS); the importance of horizontal and vertical resolution to production of lamina are investigated. A simulation with a high horizontal reolution (grid spacing 1° latitude by 1.25° longitude) and high vertical resolution (?300 m grid spacing) isentropic model produces lamination frequencies close to the balloon sonde climatology near the polar vortex edge but exhibits too much lamination in the subtropics. This indicates that the GEOS DAS winds contain the information to produce laminar events, although such small-scale features are not manifest in the more commonly used 2° latitude by 2.5° longitude transport model, which uses the hybrid sigma-pressure vertical coordinate. The zonal average ozone tendencies due to horizontal mixing in the lamina-producing models are similar to the tendencies in coarser resolution models that show no lamination, suggesting that it is not necessary to resolve laminar events to maintain a realistic ozone budget. The comparison of the modeled lamination frequency with the balloon sonde climatology indicates that the model horizontal mixing at the vortex edge is accurate but in the subtropics the mixing is excessive.
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      Lamination Frequencies as a Diagnostic for Horizontal Mixing in a 3D Transport Model

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4158984
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    • Journal of the Atmospheric Sciences

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    contributor authorWeaver, Clark J.
    contributor authorDouglass, Anne R.
    contributor authorRood, Richard B.
    date accessioned2017-06-09T14:35:56Z
    date available2017-06-09T14:35:56Z
    date copyright2000/01/01
    date issued2000
    identifier issn0022-4928
    identifier otherams-22524.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4158984
    description abstractOzone simulations are performed in an attempt to simulate laminar events with the frequency observed in balloon ozone sondes. The winds are taken from the Goddard Earth Observing System Data Assimilation System (GEOS DAS); the importance of horizontal and vertical resolution to production of lamina are investigated. A simulation with a high horizontal reolution (grid spacing 1° latitude by 1.25° longitude) and high vertical resolution (?300 m grid spacing) isentropic model produces lamination frequencies close to the balloon sonde climatology near the polar vortex edge but exhibits too much lamination in the subtropics. This indicates that the GEOS DAS winds contain the information to produce laminar events, although such small-scale features are not manifest in the more commonly used 2° latitude by 2.5° longitude transport model, which uses the hybrid sigma-pressure vertical coordinate. The zonal average ozone tendencies due to horizontal mixing in the lamina-producing models are similar to the tendencies in coarser resolution models that show no lamination, suggesting that it is not necessary to resolve laminar events to maintain a realistic ozone budget. The comparison of the modeled lamination frequency with the balloon sonde climatology indicates that the model horizontal mixing at the vortex edge is accurate but in the subtropics the mixing is excessive.
    publisherAmerican Meteorological Society
    titleLamination Frequencies as a Diagnostic for Horizontal Mixing in a 3D Transport Model
    typeJournal Paper
    journal volume57
    journal issue2
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/1520-0469(2000)057<0247:LFAADF>2.0.CO;2
    journal fristpage247
    journal lastpage261
    treeJournal of the Atmospheric Sciences:;2000:;Volume( 057 ):;issue: 002
    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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