Estimation of dry deposition by using a filter pack method at Chunchon, Korea

초록

Atmospheric gases and particulates were collected using four-stage filter-pack in Chunchon from January through December in 1999. Particulate SO42- and NO3-, and gaseous HNO3, SO2 and NH3 were analyzed. Annual average concentration of SO42-(S), NO3-(S), HNO3 (g), SO2(g) and NH3(g) were 5.75 mug/m(3), 4.98 mug/m(3), 0.33ppb, 1.52ppb and 7.25ppb, respectively. Annual dry deposition fluxes were estimated using the measured concentration and dry deposition velocity published by other research group. Annual dry deposition of S was 287kg . (km)(-2).y(-1), which accounted for about 30% of total S deposition. For N deposition, dry deposition is predominant; about 70% of total N deposition was through dry process mostly as forms of NH3 and HNO3.

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