Employing a Lagrangian stochastic dispersion model and classical diffusion experiments to evaluate two turbulence parameterization schemes

Developmental Biology

Andrea U. Timm¹  Jonas da Costa Carvalho²  Gervasio A. Degrazia¹  Debora R. Roberti¹  Virnei Silva Moreira¹ 

[1] Universidade Federal de Santa Maria, Departamento de Física, Santa Maria, RS.$$;Universidade Federal de Pelotas, Departamento de Meteorologia, Pelotas, RS.$$

关键词: Turbulence parameterizations;    Lagrangian stochastic dispersion model;    Air pollution modeling;   

DOI  :  10.5094/APR.2011.043

学科分类：农业科学（综合）

来源: Dokuz Eylul Universitesi * Department of Environmental Engineering

【 摘 要 】

Considering a Lagrangian stochastic particle dispersion model and diffusion experiments, two turbulence parameterizations have been tested. The parameters obtained from the Taylor turbulence parameterization are derived from observed spectral properties and characteristics of energy containing eddies. Taylor turbulence scheme provides continuous values for the turbulent parameters in the planetary boundary layer. Hanna turbulence parameterization is obtained from theoretical considerations and second–order closure models and it does not provide continuous vertical profiles for the turbulent parameters. The predicted values by a Lagrangian diffusion model utilizing Taylor turbulence parameterization and the Hanna turbulence scheme are compared with observed concentration data from diffusion experiments. The use of Taylor turbulence scheme resulted in better results.

【 授权许可】

Unknown   

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