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Employing Spectral Analysis to Obtain Dispersion Parameters in an Atmospheric Environment Driven by a Mesoscale Downslope Windstorm

Author

Listed:
  • Cinara Ewerling da Rosa

    (Departamento de Física, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil
    Instituto Federal Farroupilha, São Vicente do Sul 97420-000, RS, Brazil)

  • Michel Stefanello

    (Departamento de Física, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil)

  • Silvana Maldaner

    (Departamento de Física, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil)

  • Douglas Stefanello Facco

    (Research Center on Remote Sensing and Meteorology, Universidade Federal do Rio Grande do Sul, Porto Alegre 91501-970, RS, Brazil)

  • Débora Regina Roberti

    (Departamento de Física, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil)

  • Tiziano Tirabassi

    (Departamento de Física, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil)

  • Gervásio Annes Degrazia

    (Departamento de Física, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil)

Abstract

Considering the influence of the downslope windstorm called “Vento Norte” (VNOR; Portuguese for “North Wind”) in planetary boundary layer turbulent features, a new set of turbulent parameterizations, which are to be used in atmospheric dispersion models, has been derived. Taylor’s statistical diffusion theory, velocity spectra obtained at four levels (3, 6, 14, and 30 m) in a micrometeorological tower, and the energy-containing eddy scales are used to calculate neutral planetary boundary layer turbulent parameters. Vertical profile formulations of the wind velocity variances and Lagrangian decorrelation time scales are proposed, and to validate this new parameterization, it is applied in a Lagrangian Stochastic Particle Dispersion Model to simulate the Prairie Grass concentration experiments. The simulated concentration results were shown to agree with those observed.

Suggested Citation

  • Cinara Ewerling da Rosa & Michel Stefanello & Silvana Maldaner & Douglas Stefanello Facco & Débora Regina Roberti & Tiziano Tirabassi & Gervásio Annes Degrazia, 2021. "Employing Spectral Analysis to Obtain Dispersion Parameters in an Atmospheric Environment Driven by a Mesoscale Downslope Windstorm," IJERPH, MDPI, vol. 18(24), pages 1-11, December.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:24:p:13027-:d:699273
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    References listed on IDEAS

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    1. Arbage, Maria Cristina Andres & Degrazia, Gervásio Annes & Welter, Guilherme Sausen & Roberti, Débora Regina & Acevedo, Otávio Costa & de Moraes, Osvaldo Luiz Leal & Ferraz, Simone Teleginski & Timm, , 2008. "Turbulent statistical characteristics associated to the north wind phenomenon in southern Brazil with application to turbulent diffusion," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 387(16), pages 4376-4386.
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