YaBeSH Engineering and Technology Library

    • Journals
    • PaperQuest
    • YSE Standards
    • YaBeSH
    • Login
    View Item 
    •   YE&T Library
    • AMS
    • Journal of Applied Meteorology
    • View Item
    •   YE&T Library
    • AMS
    • Journal of Applied Meteorology
    • View Item
    • All Fields
    • Source Title
    • Year
    • Publisher
    • Title
    • Subject
    • Author
    • DOI
    • ISBN
    Advanced Search
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Archive

    Precipitation Development in Natural and Seeded Cumulus Clouds in Southern Africa

    Source: Journal of Applied Meteorology:;1988:;volume( 027 ):;issue: 006::page 734
    Author:
    Hudak, D. R.
    ,
    List, R.
    DOI: 10.1175/1520-0450(1988)027<0734:PDINAS>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The development of precipitation was studied in southern Africa in 23 clouds, 12 unseeded and 11 seeded, from 11 days during the Bethlehem Precipitation Research Project. Surface and upper air data were used to describe the environmental conditions while aircraft and radar data were used to determine the ice water budget in the clouds. Two relatively simple cloud models were used to help identify seedable situations. They were a one-dimensional steady state model with bulk microphysical parameterization and a one-dimensional time-dependent model with detailed microphysics. The data were divided into three sets based on the main airmasses affecting the area: maritime tropical (mT), continental tropical (cT), and maritime polar (mP). The smaller clouds on the mT days, with tops warmer than ? 20°C, were the most likely candidate for precipitation enhancement from both the microphysical and dynamic seeding viewpoints. There the time-dependent model calculated a precipitation efficiency increase from 2% to 15% due to seeding. For clouds in the cT air the rapid natural onset of ice suggested that they were not seedable microphysically. Clouds in the mP air were determined to be not seedable because they were either very efficient microphysically or their lifetimes were too short. The developed procedures give insight into the chances for rain enhancement in a given meteorological situation. To treat these results in a statistically significant manner would require a much larger sample of cases.
    • Download: (1.726Mb)
    • Show Full MetaData Hide Full MetaData
    • Item Order
    • Go To Publisher
    • Price: 5000 Rial
    • Statistics

      Precipitation Development in Natural and Seeded Cumulus Clouds in Southern Africa

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4146562
    Collections
    • Journal of Applied Meteorology

    Show full item record

    contributor authorHudak, D. R.
    contributor authorList, R.
    date accessioned2017-06-09T14:02:21Z
    date available2017-06-09T14:02:21Z
    date copyright1988/06/01
    date issued1988
    identifier issn0894-8763
    identifier otherams-11344.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4146562
    description abstractThe development of precipitation was studied in southern Africa in 23 clouds, 12 unseeded and 11 seeded, from 11 days during the Bethlehem Precipitation Research Project. Surface and upper air data were used to describe the environmental conditions while aircraft and radar data were used to determine the ice water budget in the clouds. Two relatively simple cloud models were used to help identify seedable situations. They were a one-dimensional steady state model with bulk microphysical parameterization and a one-dimensional time-dependent model with detailed microphysics. The data were divided into three sets based on the main airmasses affecting the area: maritime tropical (mT), continental tropical (cT), and maritime polar (mP). The smaller clouds on the mT days, with tops warmer than ? 20°C, were the most likely candidate for precipitation enhancement from both the microphysical and dynamic seeding viewpoints. There the time-dependent model calculated a precipitation efficiency increase from 2% to 15% due to seeding. For clouds in the cT air the rapid natural onset of ice suggested that they were not seedable microphysically. Clouds in the mP air were determined to be not seedable because they were either very efficient microphysically or their lifetimes were too short. The developed procedures give insight into the chances for rain enhancement in a given meteorological situation. To treat these results in a statistically significant manner would require a much larger sample of cases.
    publisherAmerican Meteorological Society
    titlePrecipitation Development in Natural and Seeded Cumulus Clouds in Southern Africa
    typeJournal Paper
    journal volume27
    journal issue6
    journal titleJournal of Applied Meteorology
    identifier doi10.1175/1520-0450(1988)027<0734:PDINAS>2.0.CO;2
    journal fristpage734
    journal lastpage756
    treeJournal of Applied Meteorology:;1988:;volume( 027 ):;issue: 006
    contenttypeFulltext
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian
     
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian