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    Polarimetric Signatures from Ice Crystals Observed at 95 GHz in Winter Clouds. Part II: Frequencies of Occurrence

    Source: Journal of the Atmospheric Sciences:;2001:;Volume( 058 ):;issue: 008::page 842
    Author:
    Wolde, Mengistu
    ,
    Vali, Gabor
    DOI: 10.1175/1520-0469(2001)058<0842:PSFICO>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Data are presented, from a large collection of observations in wintertime clouds in Wyoming, which show that the fraction of cloud volumes from which significant radar polarimetric information can be obtained is small. For example, when averaged over all available samples, signals exceeding the chosen limits of 3 dB for ZDR and ?18 dB for linear depolarization ratio were found in just a few percent of the observations for radar beam incidence angles of less than 45°. In general, the polarimetric signatures are interpreted as indicators of the prevalence of pristine and lightly rimed crystals, as opposed to more densely rimed crystals, graupel, or aggregates. However, specific cases are presented to illustrate exceptions to this interpretation. The polarimetric signatures provide information regarding ice crystal types from larger cloud volumes than can be observed with in situ probes, and thus may aid in understanding the evolution and possible origin of hydrometeors in the clouds. They may also help to refine assumptions made in the modeling of radiative transfer through clouds.
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      Polarimetric Signatures from Ice Crystals Observed at 95 GHz in Winter Clouds. Part II: Frequencies of Occurrence

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4159300
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    contributor authorWolde, Mengistu
    contributor authorVali, Gabor
    date accessioned2017-06-09T14:36:47Z
    date available2017-06-09T14:36:47Z
    date copyright2001/04/01
    date issued2001
    identifier issn0022-4928
    identifier otherams-22809.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4159300
    description abstractData are presented, from a large collection of observations in wintertime clouds in Wyoming, which show that the fraction of cloud volumes from which significant radar polarimetric information can be obtained is small. For example, when averaged over all available samples, signals exceeding the chosen limits of 3 dB for ZDR and ?18 dB for linear depolarization ratio were found in just a few percent of the observations for radar beam incidence angles of less than 45°. In general, the polarimetric signatures are interpreted as indicators of the prevalence of pristine and lightly rimed crystals, as opposed to more densely rimed crystals, graupel, or aggregates. However, specific cases are presented to illustrate exceptions to this interpretation. The polarimetric signatures provide information regarding ice crystal types from larger cloud volumes than can be observed with in situ probes, and thus may aid in understanding the evolution and possible origin of hydrometeors in the clouds. They may also help to refine assumptions made in the modeling of radiative transfer through clouds.
    publisherAmerican Meteorological Society
    titlePolarimetric Signatures from Ice Crystals Observed at 95 GHz in Winter Clouds. Part II: Frequencies of Occurrence
    typeJournal Paper
    journal volume58
    journal issue8
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/1520-0469(2001)058<0842:PSFICO>2.0.CO;2
    journal fristpage842
    journal lastpage849
    treeJournal of the Atmospheric Sciences:;2001:;Volume( 058 ):;issue: 008
    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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