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    Variability of the Supersaturation in Cumulus Clouds

    Source: Journal of the Atmospheric Sciences:;1988:;Volume( 045 ):;issue: 011::page 1651
    Author:
    Politovich, Marcia K.
    ,
    Cooper, William A.
    DOI: 10.1175/1520-0469(1988)045<1651:VOTSIC>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The quasi-steady supersaturation in cumulus clouds from the Cooperative Convective Precipitation Experiment of 1981 are calculated from measurements of vertical wind, cloud droplet size, temperature and pressure. Mean values and spectral characteristics of the supersaturation are presented. The supersaturation values in 147 cloud regions averaged near 0%, with standard deviations in the (10-m average) supersaturation values that ranged from 0.1% in unmixed regions to about 0.4% in regions about 80% diluted by entrainment. The Eulerian variance spectra for vertical wind, integral radius and supersaturation were determined, and a technique is described for estimating the Lagrangian spectra. The Lagrangian characteristic times for supersaturation were estimated to be about 50 s for mixed regions but substantially larger for some regions with strong updrafts. It is argued that the observed variability in supersaturation is comparable to that needed to account for typical dispersions in droplet size spectra.
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      Variability of the Supersaturation in Cumulus Clouds

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4155984
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    contributor authorPolitovich, Marcia K.
    contributor authorCooper, William A.
    date accessioned2017-06-09T14:28:15Z
    date available2017-06-09T14:28:15Z
    date copyright1988/06/01
    date issued1988
    identifier issn0022-4928
    identifier otherams-19825.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4155984
    description abstractThe quasi-steady supersaturation in cumulus clouds from the Cooperative Convective Precipitation Experiment of 1981 are calculated from measurements of vertical wind, cloud droplet size, temperature and pressure. Mean values and spectral characteristics of the supersaturation are presented. The supersaturation values in 147 cloud regions averaged near 0%, with standard deviations in the (10-m average) supersaturation values that ranged from 0.1% in unmixed regions to about 0.4% in regions about 80% diluted by entrainment. The Eulerian variance spectra for vertical wind, integral radius and supersaturation were determined, and a technique is described for estimating the Lagrangian spectra. The Lagrangian characteristic times for supersaturation were estimated to be about 50 s for mixed regions but substantially larger for some regions with strong updrafts. It is argued that the observed variability in supersaturation is comparable to that needed to account for typical dispersions in droplet size spectra.
    publisherAmerican Meteorological Society
    titleVariability of the Supersaturation in Cumulus Clouds
    typeJournal Paper
    journal volume45
    journal issue11
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/1520-0469(1988)045<1651:VOTSIC>2.0.CO;2
    journal fristpage1651
    journal lastpage1664
    treeJournal of the Atmospheric Sciences:;1988:;Volume( 045 ):;issue: 011
    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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