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    Classification of Tropical Precipitating Systems Using Wind Profiler Spectral Moments. Part I: Algorithm Description and Validation

    Source: Journal of Atmospheric and Oceanic Technology:;2008:;volume( 025 ):;issue: 006::page 884
    Author:
    Rao, T. Narayana
    ,
    Kirankumar, N. V. P.
    ,
    Radhakrishna, B.
    ,
    Rao, D. Narayana
    ,
    Nakamura, K.
    DOI: 10.1175/2007JTECHA1031.1
    Publisher: American Meteorological Society
    Abstract: The lower atmospheric wind profiler (LAWP) measurements made at Gadanki, India, have been used to develop an objective algorithm to classify the tropical precipitating systems. A detailed investigation on the existing classification scheme reveals major shortcomings in the scheme. In the present study, it is shown with examples that the Doppler velocity gradient (DVG) criterion is a necessary but certainly not a sufficient condition to identify the radar bright band. Such gradients in Doppler velocity can exist in other types of rain systems, for example, in convection, due to the modulation of Doppler velocity of hydrometeors by vertical air motion. The approach of the new classification scheme deviates considerably from that of existing algorithms. For instance, the new algorithm, in contrast to identifying the stratiform rain and assuming the remaining rain as convection, identifies first convection and later stratiform precipitation based on their specific characteristics. The other interesting feature in this algorithm is that it was built on the strengths of other potential classification schemes and theoretically accepted thresholds for classification of the precipitation. The performance of the new algorithm has been verified with the help of time?height maps of profiler moments and corresponding surface rainfall patterns.
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      Classification of Tropical Precipitating Systems Using Wind Profiler Spectral Moments. Part I: Algorithm Description and Validation

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4207386
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    contributor authorRao, T. Narayana
    contributor authorKirankumar, N. V. P.
    contributor authorRadhakrishna, B.
    contributor authorRao, D. Narayana
    contributor authorNakamura, K.
    date accessioned2017-06-09T16:20:30Z
    date available2017-06-09T16:20:30Z
    date copyright2008/06/01
    date issued2008
    identifier issn0739-0572
    identifier otherams-66089.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4207386
    description abstractThe lower atmospheric wind profiler (LAWP) measurements made at Gadanki, India, have been used to develop an objective algorithm to classify the tropical precipitating systems. A detailed investigation on the existing classification scheme reveals major shortcomings in the scheme. In the present study, it is shown with examples that the Doppler velocity gradient (DVG) criterion is a necessary but certainly not a sufficient condition to identify the radar bright band. Such gradients in Doppler velocity can exist in other types of rain systems, for example, in convection, due to the modulation of Doppler velocity of hydrometeors by vertical air motion. The approach of the new classification scheme deviates considerably from that of existing algorithms. For instance, the new algorithm, in contrast to identifying the stratiform rain and assuming the remaining rain as convection, identifies first convection and later stratiform precipitation based on their specific characteristics. The other interesting feature in this algorithm is that it was built on the strengths of other potential classification schemes and theoretically accepted thresholds for classification of the precipitation. The performance of the new algorithm has been verified with the help of time?height maps of profiler moments and corresponding surface rainfall patterns.
    publisherAmerican Meteorological Society
    titleClassification of Tropical Precipitating Systems Using Wind Profiler Spectral Moments. Part I: Algorithm Description and Validation
    typeJournal Paper
    journal volume25
    journal issue6
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/2007JTECHA1031.1
    journal fristpage884
    journal lastpage897
    treeJournal of Atmospheric and Oceanic Technology:;2008:;volume( 025 ):;issue: 006
    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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