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Estimation of Dry Deposition in Urban Area, 2005  

Shin S.A. (Air Quality Division, National Institute of Environmental Research)
Han J.S. (Air Quality Division, National Institute of Environmental Research)
Lee S.D. (Air Quality Division, National Institute of Environmental Research)
Choi J.S. (Air Quality Division, National Institute of Environmental Research)
Publication Information
Journal of Korean Society for Atmospheric Environment / v.22, no.4, 2006 , pp. 477-486 More about this Journal
Abstract
Dry deposition fluxes for $SO_2$, particulate sulfate, nitrate, ammonium and $HNO_3$ were estimated in urban area for the time period January$\sim$ October 2005. Fluxes were generated using atmospheric concentration data collected both in Acid Deposition and Air Quality Monitoring Networks, and deposition velocities computed by combining land-use data with meteorological information. The resulting annually averaged $SO_2$, $NO_3$, and aerosol deposition velocities were found to be 0.4 cm/s, 4.3 cm/s and 0.1 cm/s, respectively, and thus deposition rates were 4.4 mg/$m^2$. day for $SO_2$, and 5.4 mg/$m^2$ . day for $NHO_3$, and particulate sulfate, ammonium and nitrate recorded 1.0 mg/$m^2$ . day, 0.4 mg/$m^2$ . day and 0.4 mg/$m^2$ day, respectively. Maximum for in seasonal variation of monthly averaged deposition velocities occurred in summer in contrast to $HNO_3$ showing peak in spring. There was no significant variation for aerosol. The dry to total (wet and dry) deposition contributed about 40% for sulfur and 28% for nitrogen species in this study.
Keywords
Acid deposition; Dry deposition flux; Deposition velocity; Sulfur; Nitrogen;
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