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    Properties of Cirrus Generating Cells

    Source: Journal of the Atmospheric Sciences:;1972:;Volume( 029 ):;issue: 007::page 1358
    Author:
    Heymsfield, A. J.
    ,
    Knollenberg, R. G.
    DOI: 10.1175/1520-0469(1972)029<1358:POCGC>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Particle size spectra were measured during 20 hr of sampling in cirrus generating cells (uncinus, stratus, spissatus, thunderstorm anvil) and the particle concentration, mean crystal length, ice water content, reflectivity factor, and precipitation rate were calculated from these spectra. Average values of the physical properties in the generating cells were: Ice crystal concentration: 10,000?25,000m?3 Mean crystal length: 0.6?1.0 mm Particle habit: bullet, rosette, column (75%)-plate (25%) Ice crystal density. 0.6?0.9 gm m?3 Ice water content. 0.15?0.25 gm ?3 Reflectivity factor: 5.0?20.0 mm6?3 Precipitation rate. 0.5?0.7 mm hr?1 Growth was found to be downward, reaching a maximum ice water content just below the base of the generating cell. The maximum ice water contents (not including the thunderstorm anvil) were found in cirrus uncinus. Liquid water was not found throughout the cirrus sampling by measurement with the Johnson-Williams hot wire liquid water meter; however, we believe that liquid water is present as a transient phase.
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      Properties of Cirrus Generating Cells

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4152032
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    contributor authorHeymsfield, A. J.
    contributor authorKnollenberg, R. G.
    date accessioned2017-06-09T14:16:40Z
    date available2017-06-09T14:16:40Z
    date copyright1972/10/01
    date issued1972
    identifier issn0022-4928
    identifier otherams-16268.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4152032
    description abstractParticle size spectra were measured during 20 hr of sampling in cirrus generating cells (uncinus, stratus, spissatus, thunderstorm anvil) and the particle concentration, mean crystal length, ice water content, reflectivity factor, and precipitation rate were calculated from these spectra. Average values of the physical properties in the generating cells were: Ice crystal concentration: 10,000?25,000m?3 Mean crystal length: 0.6?1.0 mm Particle habit: bullet, rosette, column (75%)-plate (25%) Ice crystal density. 0.6?0.9 gm m?3 Ice water content. 0.15?0.25 gm ?3 Reflectivity factor: 5.0?20.0 mm6?3 Precipitation rate. 0.5?0.7 mm hr?1 Growth was found to be downward, reaching a maximum ice water content just below the base of the generating cell. The maximum ice water contents (not including the thunderstorm anvil) were found in cirrus uncinus. Liquid water was not found throughout the cirrus sampling by measurement with the Johnson-Williams hot wire liquid water meter; however, we believe that liquid water is present as a transient phase.
    publisherAmerican Meteorological Society
    titleProperties of Cirrus Generating Cells
    typeJournal Paper
    journal volume29
    journal issue7
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/1520-0469(1972)029<1358:POCGC>2.0.CO;2
    journal fristpage1358
    journal lastpage1366
    treeJournal of the Atmospheric Sciences:;1972:;Volume( 029 ):;issue: 007
    contenttypeFulltext
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