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    Electrical and Microphysical Measurements in Warm Cumulus Clouds Before and After Seeding

    Source: Journal of Applied Meteorology:;1976:;volume( 015 ):;issue: 012::page 1295
    Author:
    Murty, A. S. Ramachandra
    ,
    Selvam, A. M.
    ,
    Vijayakumar, R.
    ,
    Paul, S. K.
    ,
    Murty, Bh V. Ramana
    DOI: 10.1175/1520-0450(1976)015<1295:EAMMIW>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Electrical and microphysical measurements were made in warm maritime and inland cumulus clouds, before and after seeding, by repeated aircraft penetrations at a single level, a few hundred meters above cloud base. Such measurements were also made in non-seeded clouds by single penetrations during transient flights. The electric field initially was negative in the maritime clouds which developed rain. In the cloud case which dissipated without rain it was initially positive. The field showed sign reversal with time, occasionally preceded by intensification, in all maritime clouds. The field initially was positive in inland clouds. It showed no time variation except in one cloud case where both positive and negative fields were recorded during the period of heavy rain. The droplet charge, droplet median volume diameter and liquid water content showed no marked time variation in either maritime or inland clouds. However, in the cloud case which developed heavy rain marked increases in droplet median volume diameter and liquid water content were recorded. The time variations of electrical and microphysical parameters following seeding are in general within the range of their natural variability.
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      Electrical and Microphysical Measurements in Warm Cumulus Clouds Before and After Seeding

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4232653
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    • Journal of Applied Meteorology

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    contributor authorMurty, A. S. Ramachandra
    contributor authorSelvam, A. M.
    contributor authorVijayakumar, R.
    contributor authorPaul, S. K.
    contributor authorMurty, Bh V. Ramana
    date accessioned2017-06-09T17:38:53Z
    date available2017-06-09T17:38:53Z
    date copyright1976/12/01
    date issued1976
    identifier issn0021-8952
    identifier otherams-9192.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4232653
    description abstractElectrical and microphysical measurements were made in warm maritime and inland cumulus clouds, before and after seeding, by repeated aircraft penetrations at a single level, a few hundred meters above cloud base. Such measurements were also made in non-seeded clouds by single penetrations during transient flights. The electric field initially was negative in the maritime clouds which developed rain. In the cloud case which dissipated without rain it was initially positive. The field showed sign reversal with time, occasionally preceded by intensification, in all maritime clouds. The field initially was positive in inland clouds. It showed no time variation except in one cloud case where both positive and negative fields were recorded during the period of heavy rain. The droplet charge, droplet median volume diameter and liquid water content showed no marked time variation in either maritime or inland clouds. However, in the cloud case which developed heavy rain marked increases in droplet median volume diameter and liquid water content were recorded. The time variations of electrical and microphysical parameters following seeding are in general within the range of their natural variability.
    publisherAmerican Meteorological Society
    titleElectrical and Microphysical Measurements in Warm Cumulus Clouds Before and After Seeding
    typeJournal Paper
    journal volume15
    journal issue12
    journal titleJournal of Applied Meteorology
    identifier doi10.1175/1520-0450(1976)015<1295:EAMMIW>2.0.CO;2
    journal fristpage1295
    journal lastpage1301
    treeJournal of Applied Meteorology:;1976:;volume( 015 ):;issue: 012
    contenttypeFulltext
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