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    A Balloonborne Instrument for the Measurement of Vertical Profiles of Supercooled Liquid Water Concentration

    Source: Journal of Applied Meteorology:;1979:;volume( 019 ):;issue: 011::page 1285
    Author:
    Hill, Geoffrey E.
    ,
    Woffinden, Duard S.
    DOI: 10.1175/1520-0450(1980)019<1285:ABIFTM>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: A vibrating wire placed in the humidity duct of a standard U.S. rawinsonde is used to measure vertical profiles of the concentration of supercooled liquid water in clouds. The natural frequency of vibration varies according to the mass of ice accumulated by contact freezing. By monitoring the natural frequency and the airspeed relative to the wire, the supercooled liquid water concentration can be found. Suitable electronics are developed for both individual expendable rawinsonde units and a ground-based receiver so that the vibration frequency can be recorded. Calibration of the frequency change versus mass accumulation is done theoretically along with measurements made in a wind tunnel with supercooled water present. Further verification is found by the use of paint, uniformly sprayed on the ?upwind? side of an exposed wire. For exposition of the instrument, a sample sounding is described.
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      A Balloonborne Instrument for the Measurement of Vertical Profiles of Supercooled Liquid Water Concentration

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4233532
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    • Journal of Applied Meteorology

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    contributor authorHill, Geoffrey E.
    contributor authorWoffinden, Duard S.
    date accessioned2017-06-09T17:40:40Z
    date available2017-06-09T17:40:40Z
    date copyright1980/11/01
    date issued1979
    identifier issn0021-8952
    identifier otherams-9984.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4233532
    description abstractA vibrating wire placed in the humidity duct of a standard U.S. rawinsonde is used to measure vertical profiles of the concentration of supercooled liquid water in clouds. The natural frequency of vibration varies according to the mass of ice accumulated by contact freezing. By monitoring the natural frequency and the airspeed relative to the wire, the supercooled liquid water concentration can be found. Suitable electronics are developed for both individual expendable rawinsonde units and a ground-based receiver so that the vibration frequency can be recorded. Calibration of the frequency change versus mass accumulation is done theoretically along with measurements made in a wind tunnel with supercooled water present. Further verification is found by the use of paint, uniformly sprayed on the ?upwind? side of an exposed wire. For exposition of the instrument, a sample sounding is described.
    publisherAmerican Meteorological Society
    titleA Balloonborne Instrument for the Measurement of Vertical Profiles of Supercooled Liquid Water Concentration
    typeJournal Paper
    journal volume19
    journal issue11
    journal titleJournal of Applied Meteorology
    identifier doi10.1175/1520-0450(1980)019<1285:ABIFTM>2.0.CO;2
    journal fristpage1285
    journal lastpage1292
    treeJournal of Applied Meteorology:;1979:;volume( 019 ):;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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