산성강하물의 침착량과 동태 해명에 관한 연구 -춘천 지역 안개의 화학 조성 (1996~1997) : Chemical Composition of Fog Water at Chunchon (1996~1997) = A Study on the Behavior and Deposition of Acid Precipitation

다국어 초록 (Multilingual Abstract)

Fog water samples were collected at Chunchon, Korea, by using active fog sampler during foggy period in fall of 1996 and 1997. The average annual foggy days at Chunchon increased from 37 days, for the years 1963~1973, to 63 days, for the year 1974~1993 that followed the construction of Lake Soyang. Volume weighted mean pH of fog water was 5.5 with a range of 4.8 to 7.0 in 1996, and 5.0 with a range of 4.1 to 6.6 in 1997. These pH values were higher than those of rain water sampled in corresponding years. However the concentration of ionic species in fog water were 26 times higher than those of rain water. The major anions in fog water were in order of SO₄^(2-), NO₃^(-) and Cl^(-) , and their average concentrations were 1770.6 μeq/㎖, 346.2 μeq/㎖, 216 μeq/㎖ in1996, and 901.8 μeq/㎖, 269.6 μeq/㎖, 141.0 μeq/㎖ in 1997, respectively. The major cations were Ca^(2+), NH₄, Mg^(2+) and K^(+), and their average concentrations were 408.5 μeq/㎖ in 1997, respectively. The fraction acidity of fog water was 0.006 and that of rain water was 0.2, which means fog water was much more neutralized than rain water.