YaBeSH Engineering and Technology Library

    • Journals
    • PaperQuest
    • YSE Standards
    • YaBeSH
    • Login
    View Item 
    •   YE&T Library
    • AMS
    • Journal of the Atmospheric Sciences
    • View Item
    •   YE&T Library
    • AMS
    • Journal of the Atmospheric Sciences
    • 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

    Cirrus Uncinus Generating Cells and the Evolution of Cirriform Clouds. Part I: Aircraft Observations of the Growth of the Ice Phase

    Source: Journal of the Atmospheric Sciences:;1975:;Volume( 032 ):;issue: 004::page 799
    Author:
    Heymsfield, Andrew
    DOI: 10.1175/1520-0469(1975)032<0799:CUGCAT>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The growth of the ice phase in cirrus uncinus and cirrostratus clouds was studied through aircraft measurement of cloud particle spectra at different altitudes. Five different cirrus uncinus clouds were studied; one of the cirrus uncinus evolved into cirrostratus. The temperature range of sampling was ?19 to ?58°C. In cirrus uncinus heads, crystals were determined to be nucleated and grown in the upshear region, before being carried into the trail region of the head downshear as a result of wind shear. The updraft region is upshear, and the downdraft region downshear. A ?hole? was found to separate the up-and downshear regions of the head, with a horizontal extent of about 150 m. The concentrations of crystals in the head region were on the order of 0.5 cm ?3, with 0.025-0.05 cm ?3 longer than 100 µm. Accumulation of particles in the updraft region was noted. The mean length of crystals longer than 100 µm (precipitation size particles) ranged between 0.5 and 1.0 mm, and crystals as long as 2 mm were found at temperatures as low as ?56°C. The average ice water content was found to be 0.15?0.3 gm ?3 in the head. The cirrostratus clouds sampled had their nucleation regions near the top of the clouds; crystals sedimented and grew from this source region near the top to near the base, and then evaporated to the base. The crystal concentrations were about 0.2 cm?3, WITH 0.01 ?3 longer than 100 µm. The mean length of crystals larger than 100 µm ranged between 0.2?0.5mm. The ice water content ranged between 0.01?0.16 g m?3.
    • Download: (883.2Kb)
    • Show Full MetaData Hide Full MetaData
    • Item Order
    • Go To Publisher
    • Price: 5000 Rial
    • Statistics

      Cirrus Uncinus Generating Cells and the Evolution of Cirriform Clouds. Part I: Aircraft Observations of the Growth of the Ice Phase

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4152613
    Collections
    • Journal of the Atmospheric Sciences

    Show full item record

    contributor authorHeymsfield, Andrew
    date accessioned2017-06-09T14:18:04Z
    date available2017-06-09T14:18:04Z
    date copyright1975/04/01
    date issued1975
    identifier issn0022-4928
    identifier otherams-16791.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4152613
    description abstractThe growth of the ice phase in cirrus uncinus and cirrostratus clouds was studied through aircraft measurement of cloud particle spectra at different altitudes. Five different cirrus uncinus clouds were studied; one of the cirrus uncinus evolved into cirrostratus. The temperature range of sampling was ?19 to ?58°C. In cirrus uncinus heads, crystals were determined to be nucleated and grown in the upshear region, before being carried into the trail region of the head downshear as a result of wind shear. The updraft region is upshear, and the downdraft region downshear. A ?hole? was found to separate the up-and downshear regions of the head, with a horizontal extent of about 150 m. The concentrations of crystals in the head region were on the order of 0.5 cm ?3, with 0.025-0.05 cm ?3 longer than 100 µm. Accumulation of particles in the updraft region was noted. The mean length of crystals longer than 100 µm (precipitation size particles) ranged between 0.5 and 1.0 mm, and crystals as long as 2 mm were found at temperatures as low as ?56°C. The average ice water content was found to be 0.15?0.3 gm ?3 in the head. The cirrostratus clouds sampled had their nucleation regions near the top of the clouds; crystals sedimented and grew from this source region near the top to near the base, and then evaporated to the base. The crystal concentrations were about 0.2 cm?3, WITH 0.01 ?3 longer than 100 µm. The mean length of crystals larger than 100 µm ranged between 0.2?0.5mm. The ice water content ranged between 0.01?0.16 g m?3.
    publisherAmerican Meteorological Society
    titleCirrus Uncinus Generating Cells and the Evolution of Cirriform Clouds. Part I: Aircraft Observations of the Growth of the Ice Phase
    typeJournal Paper
    journal volume32
    journal issue4
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/1520-0469(1975)032<0799:CUGCAT>2.0.CO;2
    journal fristpage799
    journal lastpage808
    treeJournal of the Atmospheric Sciences:;1975:;Volume( 032 ):;issue: 004
    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