Conference proceeding
A comparison of three different dry deposition velocities in STEM-II applied around As Pontes power plant
AIR POLLUTION VIII, Vol.8, pp.147-156
2000
Abstract
STEM-II model (Carmichael et al., 1984) has been applied around As Pontes Power Plant to estimate dry deposition velocities of different gas and particulate pollutants (SO2, NO2, NO3, SO42-), covering a 7-days period. This environment is characterised by complex terrain and sea influence, with changing weather covering different dispersion conditions and precipitation rates.
In order to estimate these dry deposition velocities, three different methods were applied in the STEM-II model: (a) the original dry deposition velocities included in this model (version of 1997), as prescribed values, independently of the atmospheric conditions and land use; (b) dry deposition parameterisations proposed by Voldner et al. (1986); and, (b) Big-Leaf method, proposed by Wesely (1989), included in the RADM model, with a specific solution for dry deposition of particulate sulphate proposed by Walcek (1985).
Results show that the original STEM-II velocities provide higher deposition fluxes of sulphur and nitrogen at short distance than the Big-Leaf model, but they could underestimate them at long distance.
Details
- Title: Subtitle
- A comparison of three different dry deposition velocities in STEM-II applied around As Pontes power plant
- Creators
- M FillaM R MendezJ A SoutoJ J CasaresT LucasG R Carmichael
- Contributors
- H Power (Editor)
- Resource Type
- Conference proceeding
- Publication Details
- AIR POLLUTION VIII, Vol.8, pp.147-156
- Language
- English
- Date published
- 2000
- Academic Unit
- Civil and Environmental Engineering; Chemical and Biochemical Engineering; Nursing
- Record Identifier
- 9984231922702771
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