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    Scale Interactions and Atmospheric Predictability: An Updated Perspective

    Source: Monthly Weather Review:;2004:;volume( 132 ):;issue: 003::page 703
    Author:
    Tribbia, J. J.
    ,
    Baumhefner, D. P.
    DOI: 10.1175/1520-0493(2004)132<0703:SIAAPA>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: An examination of the scale interactions in predictability experiments is made using the NCAR Community Climate Model Version 3 (CCM3) at various horizontal resolutions ranging from T42 to T170. Both identical-model and imperfect-model twin experiments are analyzed, and they show distinctive differences from the classical inverse cascade picture of predictability error growth. In the identical-model twin framework, error growth experiments using initial errors confined to long and short scales are compared and contrasted. In these cases, error growth eventually asymptotes to an exponential growth of baroclinically active scales. In the imperfect-model twin experiments, errors rapidly disperse from scales technically beyond model resolution to a small amplitude, spectrally uniform distribution of errors in resolved scales. The errors in resolved scales further amplify in a quasi-exponential growth of the baroclinically active scales. Finally, the implications of these growth mechanisms for the necessary resolution in short- to medium-range numerical weather prediction are given under the assumption that the accuracy of current initial state estimates of the atmosphere remain fixed at their present level.
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      Scale Interactions and Atmospheric Predictability: An Updated Perspective

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4205332
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    contributor authorTribbia, J. J.
    contributor authorBaumhefner, D. P.
    date accessioned2017-06-09T16:15:18Z
    date available2017-06-09T16:15:18Z
    date copyright2004/03/01
    date issued2004
    identifier issn0027-0644
    identifier otherams-64240.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4205332
    description abstractAn examination of the scale interactions in predictability experiments is made using the NCAR Community Climate Model Version 3 (CCM3) at various horizontal resolutions ranging from T42 to T170. Both identical-model and imperfect-model twin experiments are analyzed, and they show distinctive differences from the classical inverse cascade picture of predictability error growth. In the identical-model twin framework, error growth experiments using initial errors confined to long and short scales are compared and contrasted. In these cases, error growth eventually asymptotes to an exponential growth of baroclinically active scales. In the imperfect-model twin experiments, errors rapidly disperse from scales technically beyond model resolution to a small amplitude, spectrally uniform distribution of errors in resolved scales. The errors in resolved scales further amplify in a quasi-exponential growth of the baroclinically active scales. Finally, the implications of these growth mechanisms for the necessary resolution in short- to medium-range numerical weather prediction are given under the assumption that the accuracy of current initial state estimates of the atmosphere remain fixed at their present level.
    publisherAmerican Meteorological Society
    titleScale Interactions and Atmospheric Predictability: An Updated Perspective
    typeJournal Paper
    journal volume132
    journal issue3
    journal titleMonthly Weather Review
    identifier doi10.1175/1520-0493(2004)132<0703:SIAAPA>2.0.CO;2
    journal fristpage703
    journal lastpage713
    treeMonthly Weather Review:;2004:;volume( 132 ):;issue: 003
    contenttypeFulltext
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