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    Quasi-Experimental Determination of Turbulent Dispersion Parameters for Different Stability Conditions from a Tall Micrometeorological Tower

    Source: Journal of Applied Meteorology and Climatology:;2018:;volume 057:;issue 008::page 1729
    Author:
    Martins, Luís Gustavo N.
    ,
    Degrazia, Gervásio A.
    ,
    Acevedo, Otávio C.
    ,
    Puhales, Franciano S.
    ,
    de Oliveira, Pablo E. S.
    ,
    Teichrieb, Claudio A.
    ,
    da Silva, Samuel M.
    DOI: 10.1175/JAMC-D-17-0269.1
    Publisher: American Meteorological Society
    Abstract: AbstractTurbulent wind data measured by sonic anemometers installed at various heights on a 140-m-tall micrometeorological tower located at a coastal site are used to obtain vertical profiles of the velocity standard deviations σi, Lagrangian decorrelation local time scales TLi, and eddy diffusivities Kα for distinct stability conditions. The novelty of the study lies in the use of turbulent data directly measured over the extension of the atmospheric surface layer at a coastal site for that purpose. Furthermore, the approach employs the Hilbert?Huang transform to determine the wind energy spectral peak frequencies. These are applied to the asymptotic spectral equation from Taylor statistical diffusion theory to obtain the turbulent dispersion parameters, which are shown to generally agree well with those provided by a classical autocorrelation approach. For neutral and stable situations the vertical profiles of momentum eddy diffusivities agree well with those derived from the spectral and autocorrelation method. Additionally, the turbulent integral time scales and eddy diffusivities determined by the method at a coastal location are found to overestimate those predicted from analytical expressions based on continental field observations. The turbulence parameters found are suitable to be employed in air pollution dispersion models.
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      Quasi-Experimental Determination of Turbulent Dispersion Parameters for Different Stability Conditions from a Tall Micrometeorological Tower

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4261652
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    • Journal of Applied Meteorology and Climatology

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    contributor authorMartins, Luís Gustavo N.
    contributor authorDegrazia, Gervásio A.
    contributor authorAcevedo, Otávio C.
    contributor authorPuhales, Franciano S.
    contributor authorde Oliveira, Pablo E. S.
    contributor authorTeichrieb, Claudio A.
    contributor authorda Silva, Samuel M.
    date accessioned2019-09-19T10:06:43Z
    date available2019-09-19T10:06:43Z
    date copyright6/15/2018 12:00:00 AM
    date issued2018
    identifier otherjamc-d-17-0269.1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4261652
    description abstractAbstractTurbulent wind data measured by sonic anemometers installed at various heights on a 140-m-tall micrometeorological tower located at a coastal site are used to obtain vertical profiles of the velocity standard deviations σi, Lagrangian decorrelation local time scales TLi, and eddy diffusivities Kα for distinct stability conditions. The novelty of the study lies in the use of turbulent data directly measured over the extension of the atmospheric surface layer at a coastal site for that purpose. Furthermore, the approach employs the Hilbert?Huang transform to determine the wind energy spectral peak frequencies. These are applied to the asymptotic spectral equation from Taylor statistical diffusion theory to obtain the turbulent dispersion parameters, which are shown to generally agree well with those provided by a classical autocorrelation approach. For neutral and stable situations the vertical profiles of momentum eddy diffusivities agree well with those derived from the spectral and autocorrelation method. Additionally, the turbulent integral time scales and eddy diffusivities determined by the method at a coastal location are found to overestimate those predicted from analytical expressions based on continental field observations. The turbulence parameters found are suitable to be employed in air pollution dispersion models.
    publisherAmerican Meteorological Society
    titleQuasi-Experimental Determination of Turbulent Dispersion Parameters for Different Stability Conditions from a Tall Micrometeorological Tower
    typeJournal Paper
    journal volume57
    journal issue8
    journal titleJournal of Applied Meteorology and Climatology
    identifier doi10.1175/JAMC-D-17-0269.1
    journal fristpage1729
    journal lastpage1745
    treeJournal of Applied Meteorology and Climatology:;2018:;volume 057:;issue 008
    contenttypeFulltext
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