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    Cloud Layers, Particle Identification, and Rain-Rate Profiles from ZRVf Measurements by Clear-Air Doppler Radars

    Source: Journal of Atmospheric and Oceanic Technology:;1992:;volume( 009 ):;issue: 002::page 108
    Author:
    Gossard, E. E.
    ,
    Strauch, R. G.
    ,
    Welsh, D. C.
    ,
    Matrosov, S. Y.
    DOI: 10.1175/1520-0426(1992)009<0108:CLPIAR>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Networks of radars that point almost vertically and continuously measure the vertical profile of the horizontal wind will, in the future, be operated at many locations around the world. Although such radars are designed to measure the Doppler-sensed movement of clear-air refractive-index inhomogeneities, they are an exceptional tool for sensing precipitating ice and water particles in clouds. Because of the low detection threshold and long averaging time of these radars water-particle-size distributions can be measured down to 100-µm diameter and mean vertical fall velocities Vf as small as 0.2 m s?1 can be accurately measured. In this paper, data are presented from two events in which clouds form, intensify, and finally produce precipitation. Height profiles are analyzed in terms of ZRVf plots versus height, where Z is the radar reflectivity factor and R is liquid flux (rainfall rate). The observations provide new insight into drop-growth and breakup processes. Special attention is given to the transition zone through the melting level. It is shown how these radars can provide 1) cloud-layer structure above lower overcast, 2) height profiles of liquid mean drop size, 3) the ice-water transition level compared with the 0° isotherm, 4) height profiles of rain rate, and 5) inferences about the identity of hydrometeors versus height.
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      Cloud Layers, Particle Identification, and Rain-Rate Profiles from ZRVf Measurements by Clear-Air Doppler Radars

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4213622
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    contributor authorGossard, E. E.
    contributor authorStrauch, R. G.
    contributor authorWelsh, D. C.
    contributor authorMatrosov, S. Y.
    date accessioned2017-06-09T16:39:28Z
    date available2017-06-09T16:39:28Z
    date copyright1992/04/01
    date issued1992
    identifier issn0739-0572
    identifier otherams-717.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4213622
    description abstractNetworks of radars that point almost vertically and continuously measure the vertical profile of the horizontal wind will, in the future, be operated at many locations around the world. Although such radars are designed to measure the Doppler-sensed movement of clear-air refractive-index inhomogeneities, they are an exceptional tool for sensing precipitating ice and water particles in clouds. Because of the low detection threshold and long averaging time of these radars water-particle-size distributions can be measured down to 100-µm diameter and mean vertical fall velocities Vf as small as 0.2 m s?1 can be accurately measured. In this paper, data are presented from two events in which clouds form, intensify, and finally produce precipitation. Height profiles are analyzed in terms of ZRVf plots versus height, where Z is the radar reflectivity factor and R is liquid flux (rainfall rate). The observations provide new insight into drop-growth and breakup processes. Special attention is given to the transition zone through the melting level. It is shown how these radars can provide 1) cloud-layer structure above lower overcast, 2) height profiles of liquid mean drop size, 3) the ice-water transition level compared with the 0° isotherm, 4) height profiles of rain rate, and 5) inferences about the identity of hydrometeors versus height.
    publisherAmerican Meteorological Society
    titleCloud Layers, Particle Identification, and Rain-Rate Profiles from ZRVf Measurements by Clear-Air Doppler Radars
    typeJournal Paper
    journal volume9
    journal issue2
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/1520-0426(1992)009<0108:CLPIAR>2.0.CO;2
    journal fristpage108
    journal lastpage119
    treeJournal of Atmospheric and Oceanic Technology:;1992:;volume( 009 ):;issue: 002
    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