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    Linear Depolarization Ratios of Columnar Ice Crystals in a Deep Precipitating System over the Arctic Observed by Zenith-Pointing Ka-Band Doppler Radar

    Source: Journal of Applied Meteorology and Climatology:;2015:;volume( 054 ):;issue: 005::page 1060
    Author:
    Oue, Mariko
    ,
    Kumjian, Matthew R.
    ,
    Lu, Yinghui
    ,
    Verlinde, Johannes
    ,
    Aydin, Kultegin
    ,
    Clothiaux, Eugene E.
    DOI: 10.1175/JAMC-D-15-0012.1
    Publisher: American Meteorological Society
    Abstract: his study demonstrates that linear depolarization ratio (LDR) values obtained from zenith-pointing Ka-band radar Doppler velocity spectra are sufficient for detecting columnar ice crystals. During a deep precipitating system over the Arctic on 7 December 2013, the radar recorded LDR values up to ?15 dB at temperatures corresponding to the columnar ice crystal growth regime. These LDR values were also consistent with scattering calculations for columnar ice crystals. Enhancements in LDR were suppressed within precipitation fallstreaks because the enhanced LDR values of columnar ice crystals were masked by the returns from the particles within the fallstreaks. However, Doppler velocity spectra of LDR within the fallstreak distinguished populations of slower-falling particles with high LDR (>?15 dB) and faster-falling particles with much lower LDR, suggesting that columnar ice crystals with high LDR coexisted with larger isometric particles that produced low LDR while dominating the total copolar reflectivity, thereby decreasing LDR. The measurements suggest that the columnar ice crystals originated in liquid-cloud layers through secondary ice production.
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      Linear Depolarization Ratios of Columnar Ice Crystals in a Deep Precipitating System over the Arctic Observed by Zenith-Pointing Ka-Band Doppler Radar

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4217484
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    • Journal of Applied Meteorology and Climatology

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    contributor authorOue, Mariko
    contributor authorKumjian, Matthew R.
    contributor authorLu, Yinghui
    contributor authorVerlinde, Johannes
    contributor authorAydin, Kultegin
    contributor authorClothiaux, Eugene E.
    date accessioned2017-06-09T16:50:45Z
    date available2017-06-09T16:50:45Z
    date copyright2015/05/01
    date issued2015
    identifier issn1558-8424
    identifier otherams-75177.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4217484
    description abstracthis study demonstrates that linear depolarization ratio (LDR) values obtained from zenith-pointing Ka-band radar Doppler velocity spectra are sufficient for detecting columnar ice crystals. During a deep precipitating system over the Arctic on 7 December 2013, the radar recorded LDR values up to ?15 dB at temperatures corresponding to the columnar ice crystal growth regime. These LDR values were also consistent with scattering calculations for columnar ice crystals. Enhancements in LDR were suppressed within precipitation fallstreaks because the enhanced LDR values of columnar ice crystals were masked by the returns from the particles within the fallstreaks. However, Doppler velocity spectra of LDR within the fallstreak distinguished populations of slower-falling particles with high LDR (>?15 dB) and faster-falling particles with much lower LDR, suggesting that columnar ice crystals with high LDR coexisted with larger isometric particles that produced low LDR while dominating the total copolar reflectivity, thereby decreasing LDR. The measurements suggest that the columnar ice crystals originated in liquid-cloud layers through secondary ice production.
    publisherAmerican Meteorological Society
    titleLinear Depolarization Ratios of Columnar Ice Crystals in a Deep Precipitating System over the Arctic Observed by Zenith-Pointing Ka-Band Doppler Radar
    typeJournal Paper
    journal volume54
    journal issue5
    journal titleJournal of Applied Meteorology and Climatology
    identifier doi10.1175/JAMC-D-15-0012.1
    journal fristpage1060
    journal lastpage1068
    treeJournal of Applied Meteorology and Climatology:;2015:;volume( 054 ):;issue: 005
    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