Leila
Droprinchinski
Martins, IAG/USP, leiladro@model.iag.usp.br
Pedro
Leite
Silva Dias, IAG/USP, pldsdias@master.iag.usp.br
Edmilson
Dias de
Freitas, IAG/USP, efreitas@model.iag.usp.br
(Presenting)
Luciana
Vanni
Gatti, IPEN, lvgatti@net.ipen.br
Paulo
Artaxo, IF/USP, artaxo@if.usp.br
Meinrat
O.
Andreae, Max Planck, andreae@mpch-mainz.mpg.de
Saulo
Ribeiro de
Freitas, CPTEC, sfreitas@cptec.inpe.br
Karla
Maria
Longo, CPTEC, longo@cptec.inpe.br
Maria
de Fátima
Andrade, IAG/USP, mftandra@model.iag.usp.br
A numerical simulation of a particular case study of the Manaus/Brazil ozone plume was performed with a simplified photochemical module coupled with RAMS. The on-line photochemical model is advantageous in comparison with the traditional off-line simulations of the chemical reactions because of the coupling with the sophisticated turbulence parameterizations available in RAMS and the use of shorter time steps for transferring the meteorological information to the chemical model, besides the guarantee of energy consistency. Industrial and vehicular emissions used in the model were based on those from the Sao Paulo Metropolitan Area with appropriate changes in view of the differences in urban area size. The simulations indicate that the Manaus ozone plume might travels over a distance of the order of 200 km to the west. Maximum concentrations were found to be as high as 30 ppb in a region located approximately 60 km to the west of Manaus by the end of the day at 600 m height. The ozone plume is identified mainly inside PBL, which is up to 1400 m. Numerical diffusion needs a better adjustment since the ozone plume of Manaus spread too much inside model domain. Model validation is based on measurements at the surface and aircraft flights around Manaus. Besides the simplicity of the photochemical model, it is a powerful tool for short-range ozone forecast.
Submetido por Leila Droprinchinski Martins em 25-MAR-2004