A model for dispersion of pollutants released from a continuous source in the atmospheric boundary layer is applied in order to assess the effect of different estimates of the key micrometeorological variables that represent the stability regimes or turbulent mechanisms. The model includes continuous profiles of the wind speed and eddy diffusivity for the atmospheric boundary layer. The evaluation considers the values and/or methodologies to obtain the input parameters that are available in the literature. The Prairie Grass diffusion experiment data were selected because the runs covered both stable and unstable atmospheric conditions for near-surface releases. A number of model evaluations were also reported in the literature using this dataset and the present results can be compared with other studies as well. The dispersion model performed satisfactorily in the estimation of the crosswind integrated concentration for surface releases from a continuous point source in a variety of stability conditions. The distinct micrometeorological input parameters caused, in general, minor differences in the magnitudes of diffusion and hence, in the concentrations. Some particular runs that were conducted under very stable or unstable conditions showed a greater impact and, in consequence, they gave interesting information on particular situations in which the methodologies to obtain the micrometeorological relevant parameters must be carefully analyzed.
| Documento: | Conferencia |
| Título: | H15-200: Sensitivity study of the impact of meteorological input parameters on atmospheric dispersion estimates |
| Autor: | Ulke, A.G.; San Jose R.; Perez J.L.; European Association for the Science of Air Pollution (EURASAP) |
| Filiación: | Departamento de Ciencias de la Atmósfera y los Océanos, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, C1428EGA, Argentina Unidad Mixta Internacional, Instituto Franco Argentino sobre Estudios de Clima y sus Impactos (IFAECI), CNRS, France |
| Palabras clave: | Air pollution modelling; Dispersion model; Model evaluation; Prairie grass; Air pollution; Atmospheric boundary layer; Boundary layers; Parameter estimation; Pollution; Wind; Air pollution modelling; Atmospheric conditions; Atmospheric dispersion; Crosswind integrated concentrations; Dispersion modeling; Interesting information; Model evaluation; Prairie Grass; Atmospheric movements |
| Año: | 2013 |
| Página de inicio: | 124 |
| Página de fin: | 128 |
| Título revista: | 15th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, HARMO 2013 |
| Título revista abreviado: | Proc. Int. Conf. Harmonisation Atmos. Dispers. Model. Regul. Purp., HARMO |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS13007_v_n_p124_Ulke |
