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    Cloudiness and Marine Boundary Layer Dynamics in the ASTEX Lagrangian Experiments. Part I: Synoptic Setting and Vertical Structure

    Source: Journal of the Atmospheric Sciences:;1995:;Volume( 052 ):;issue: 016::page 2707
    Author:
    Bretherton, Christopher S.
    ,
    Pincus, Robert
    DOI: 10.1175/1520-0469(1995)052<2707:CAMBLD>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: A goal of the Atlantic Stratocumulus Transition Experiment (ASTEX) southeast of the Azores Islands in the east-central Atlantic Ocean during June 1992 was to examine the coupled evolution of cloud, dynamical, and thermodynamical vertical structure in a marine boundary layer (MBL) air mass as it advected from cold to warm water in the trade winds. In two ?Lagrangian? observation periods during ASTEX, an unprecedentedly complete view of MBL and cloud evolution was achieved by nearly continuous aircraft coverage of such an air mass for 36?48 hours using three boundary layer aircraft, supplemented by satellite, ship, and balloon observations. During the first Lagrangian period, an accelerated stratocumulus to trade cumulus transition occurred in a clean marine air mass. In the second Lagrangian period, a 200-hPa-deep decoupled modified continental MBL persisted with almost no change in structure. Cumulus rising into intermittent stratocumulus were observed throughout the period. The two contrasting ASTEX Lagrangians will allow both direct comparison with MBL models and budget studies with essentially all uncertainty from poorly measured advective tendencies removed. The authors present the synoptic setting and the evolution of cloudiness as seen from satellite for both Lagrangians, and vertical sections of wind, temperature mixing ratio, liquid water, droplet concentration, and ozone formed from time series of 17 aircraft soundings during each Lagrangian. In Part II, an analyses of sea surface temperature and surface fluxes, cloudiness, drizzle, and entrainment rate during the Lagrangians are presented.
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      Cloudiness and Marine Boundary Layer Dynamics in the ASTEX Lagrangian Experiments. Part I: Synoptic Setting and Vertical Structure

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4157886
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    contributor authorBretherton, Christopher S.
    contributor authorPincus, Robert
    date accessioned2017-06-09T14:33:15Z
    date available2017-06-09T14:33:15Z
    date copyright1995/08/01
    date issued1995
    identifier issn0022-4928
    identifier otherams-21536.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4157886
    description abstractA goal of the Atlantic Stratocumulus Transition Experiment (ASTEX) southeast of the Azores Islands in the east-central Atlantic Ocean during June 1992 was to examine the coupled evolution of cloud, dynamical, and thermodynamical vertical structure in a marine boundary layer (MBL) air mass as it advected from cold to warm water in the trade winds. In two ?Lagrangian? observation periods during ASTEX, an unprecedentedly complete view of MBL and cloud evolution was achieved by nearly continuous aircraft coverage of such an air mass for 36?48 hours using three boundary layer aircraft, supplemented by satellite, ship, and balloon observations. During the first Lagrangian period, an accelerated stratocumulus to trade cumulus transition occurred in a clean marine air mass. In the second Lagrangian period, a 200-hPa-deep decoupled modified continental MBL persisted with almost no change in structure. Cumulus rising into intermittent stratocumulus were observed throughout the period. The two contrasting ASTEX Lagrangians will allow both direct comparison with MBL models and budget studies with essentially all uncertainty from poorly measured advective tendencies removed. The authors present the synoptic setting and the evolution of cloudiness as seen from satellite for both Lagrangians, and vertical sections of wind, temperature mixing ratio, liquid water, droplet concentration, and ozone formed from time series of 17 aircraft soundings during each Lagrangian. In Part II, an analyses of sea surface temperature and surface fluxes, cloudiness, drizzle, and entrainment rate during the Lagrangians are presented.
    publisherAmerican Meteorological Society
    titleCloudiness and Marine Boundary Layer Dynamics in the ASTEX Lagrangian Experiments. Part I: Synoptic Setting and Vertical Structure
    typeJournal Paper
    journal volume52
    journal issue16
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/1520-0469(1995)052<2707:CAMBLD>2.0.CO;2
    journal fristpage2707
    journal lastpage2723
    treeJournal of the Atmospheric Sciences:;1995:;Volume( 052 ):;issue: 016
    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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