Title: Estimates of lateral dispersion parameters in low wind speed conditions

Authors: Grégory Turbelin; Pierre Ngae; Hambaliou Balde

Addresses: Evry Laboratory of Mechanics and Energy, University of Evry Val d'Essonne, 40 rue du pelvoux, F-91020 Evry cedex, France ' Evry Laboratory of Mechanics and Energy, University of Evry Val d'Essonne, 40 rue du pelvoux, F-91020 Evry cedex, France ' Evry Laboratory of Mechanics and Energy, University of Evry Val d'Essonne, 40 rue du pelvoux, F-91020 Evry cedex, France

Abstract: Wind speed time series recorded during stable low wind speed conditions are typically non-stationary, with large horizontal oscillations, commonly known as meandering. In this paper, two wavelet-based methods are proposed to obtain lateral dispersion coefficients from such time series. These methods, associated with a specific wind model, have been tested by using wind velocities recorded, with an ultrasonic anemometer, on a typical suburban site located in the southern part of the Paris region (France). Both of them give similar results and differ from classical Briggs's and Doury's parameterisations for standard deviations.

Keywords: low wind speed; stable conditions; lateral dispersion coefficients; sonic anemometer data; wavelet based method; non-stationary wind models; air quality; air pollution; atmospheric dispersion modelling; meandering; time series; France; Paris.

DOI: 10.1504/IJEP.2012.051214

International Journal of Environment and Pollution, 2012 Vol.50 No.1/2/3/4, pp.441 - 450

Available online: 26 Dec 2012 *

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