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    Velocity and Temperature Structure Functions in the Upper Troposphere and Lower Stratosphere from High-Resolution Aircraft Measurements

    Source: Journal of the Atmospheric Sciences:;2009:;Volume( 067 ):;issue: 004::page 1157
    Author:
    Wroblewski, Donald E.
    ,
    Coté, Owen R.
    ,
    Hacker, Jorg M.
    ,
    Dobosy, Ronald J.
    DOI: 10.1175/2009JAS3108.1
    Publisher: American Meteorological Society
    Abstract: High-resolution measurements obtained from NOAA ?best? atmospheric turbulence (BAT) probes mounted on an EGRETT high-altitude research aircraft were used to characterize turbulence in the upper troposphere and lower stratosphere at scales from 2 m to 20 km, focusing on three-dimensional behavior in the sub-kilometer-scale range. Data were analyzed for 129 separate level flight segments representing 41 h of flight time and 12 600 km of wind-relative flight distances. The majority of flights occurred near the tropopause layer of the winter subtropical jet stream in the Southern Hemisphere. Second-order structure functions for velocity and temperature were analyzed for the separate level-flight segments, individually and in various ensembles. A 3D scaling range was observed at scales less than about 100 m, with power-law exponents for the structure functions of the velocity component in the flight direction varying mostly between 0.4 and 0.75 for the separate flight segments, but close to ? for the ensemble-averaged curves for all levels and for various subensembles. Structure functions in the 3D scaling range were decoupled from those at scales greater than 10 km, with the large-scale structure functions showing less variation than those at smaller scales. Weakly anisotropic behavior was observed in the 3D range, with structure parameters for the lateral and vertical velocities on the same order as those in the flight direction but deviating from the expected isotropic value. Anisotropy was correlated with turbulence intensity, with greater anisotropy associated with weaker turbulence.
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      Velocity and Temperature Structure Functions in the Upper Troposphere and Lower Stratosphere from High-Resolution Aircraft Measurements

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4210069
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    contributor authorWroblewski, Donald E.
    contributor authorCoté, Owen R.
    contributor authorHacker, Jorg M.
    contributor authorDobosy, Ronald J.
    date accessioned2017-06-09T16:28:23Z
    date available2017-06-09T16:28:23Z
    date copyright2010/04/01
    date issued2009
    identifier issn0022-4928
    identifier otherams-68503.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4210069
    description abstractHigh-resolution measurements obtained from NOAA ?best? atmospheric turbulence (BAT) probes mounted on an EGRETT high-altitude research aircraft were used to characterize turbulence in the upper troposphere and lower stratosphere at scales from 2 m to 20 km, focusing on three-dimensional behavior in the sub-kilometer-scale range. Data were analyzed for 129 separate level flight segments representing 41 h of flight time and 12 600 km of wind-relative flight distances. The majority of flights occurred near the tropopause layer of the winter subtropical jet stream in the Southern Hemisphere. Second-order structure functions for velocity and temperature were analyzed for the separate level-flight segments, individually and in various ensembles. A 3D scaling range was observed at scales less than about 100 m, with power-law exponents for the structure functions of the velocity component in the flight direction varying mostly between 0.4 and 0.75 for the separate flight segments, but close to ? for the ensemble-averaged curves for all levels and for various subensembles. Structure functions in the 3D scaling range were decoupled from those at scales greater than 10 km, with the large-scale structure functions showing less variation than those at smaller scales. Weakly anisotropic behavior was observed in the 3D range, with structure parameters for the lateral and vertical velocities on the same order as those in the flight direction but deviating from the expected isotropic value. Anisotropy was correlated with turbulence intensity, with greater anisotropy associated with weaker turbulence.
    publisherAmerican Meteorological Society
    titleVelocity and Temperature Structure Functions in the Upper Troposphere and Lower Stratosphere from High-Resolution Aircraft Measurements
    typeJournal Paper
    journal volume67
    journal issue4
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/2009JAS3108.1
    journal fristpage1157
    journal lastpage1170
    treeJournal of the Atmospheric Sciences:;2009:;Volume( 067 ):;issue: 004
    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
    yabeshDSpacePersian