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    Radar Anomalous Propagation Associated with Foehn Winds Induced by Typhoon Krosa (2007)

    Source: Journal of Applied Meteorology and Climatology:;2011:;volume( 050 ):;issue: 007::page 1527
    Author:
    Chang, Pao-Liang
    ,
    Lin, Pin-Fang
    DOI: 10.1175/2011JAMC2619.1
    Publisher: American Meteorological Society
    Abstract: n this study, unusual radar anomalous propagation (AP) phenomena associated with foehn winds induced by Typhoon Krosa (2007) were documented by using observations from radar, surface stations, and soundings. The AP echoes embedded within rainband areas and exhibited inward motions toward the radar site within 2?3 h prior to the occurrences of foehn winds at the radar site, which would interfere with the interpretation of radar data and associated downstream applications. As Typhoon Krosa appeared in the vicinity of the northeastern coast of Taiwan, foehn winds with significant subsidence warming and drying generated by downslope winds were observed in southeastern Taiwan. The foehn winds continuously moved northward within confined areas from the southeastern to eastern?central parts of Taiwan. Before the foehn winds penetrated to the surface, the subsidence warming introduced a temperature inversion layer above the surface and caused the ducting of radar beams. Analyses of refractive index and ray tracing suggested that the occurrence and evolution of the AP echoes during Typhoon Krosa were closely related to the varying inversion heights induced by downslope winds.
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      Radar Anomalous Propagation Associated with Foehn Winds Induced by Typhoon Krosa (2007)

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4213559
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    • Journal of Applied Meteorology and Climatology

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    contributor authorChang, Pao-Liang
    contributor authorLin, Pin-Fang
    date accessioned2017-06-09T16:39:17Z
    date available2017-06-09T16:39:17Z
    date copyright2011/07/01
    date issued2011
    identifier issn1558-8424
    identifier otherams-71644.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4213559
    description abstractn this study, unusual radar anomalous propagation (AP) phenomena associated with foehn winds induced by Typhoon Krosa (2007) were documented by using observations from radar, surface stations, and soundings. The AP echoes embedded within rainband areas and exhibited inward motions toward the radar site within 2?3 h prior to the occurrences of foehn winds at the radar site, which would interfere with the interpretation of radar data and associated downstream applications. As Typhoon Krosa appeared in the vicinity of the northeastern coast of Taiwan, foehn winds with significant subsidence warming and drying generated by downslope winds were observed in southeastern Taiwan. The foehn winds continuously moved northward within confined areas from the southeastern to eastern?central parts of Taiwan. Before the foehn winds penetrated to the surface, the subsidence warming introduced a temperature inversion layer above the surface and caused the ducting of radar beams. Analyses of refractive index and ray tracing suggested that the occurrence and evolution of the AP echoes during Typhoon Krosa were closely related to the varying inversion heights induced by downslope winds.
    publisherAmerican Meteorological Society
    titleRadar Anomalous Propagation Associated with Foehn Winds Induced by Typhoon Krosa (2007)
    typeJournal Paper
    journal volume50
    journal issue7
    journal titleJournal of Applied Meteorology and Climatology
    identifier doi10.1175/2011JAMC2619.1
    journal fristpage1527
    journal lastpage1542
    treeJournal of Applied Meteorology and Climatology:;2011:;volume( 050 ):;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
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