The major ionic components of precipitation collected at the 1100 Site of Mt. Halla and Jeju city have been determined. The reliability of the analytical data was verified by the comparison of ion balances, electric conductivities and acid fractions; all of their correlation coefficients were above 0.94. Ionic strengths lower than 10 −4 M were found in 53% of the 1100 Site samples and 28% of the Jeju city samples. and NO 3 − in the Jeju area, and the organic acids have contributed only about 7% to the acidity. The neutralization factors by NH 3 were 0.47 and 0.48, and that of CaCO 3 was 0.31 and 0.25 at the 1100 Site and Jeju city, respectively. Investigation into major influencing sources on precipitation components by factor analysis showed that the precipitation at the 1100 Site had been influenced mostly by an anthropogenic source, followed by soil and seawater sources. The precipitation at Jeju city was mainly influenced by oceanic sources, followed by anthropogenic and soil sources.

서 론우리나라에서는 AbstractThe collection of PM 10 and PM 2.5 samples was made at Gosan site of Jeju Island. Their ionic compositions of both inorganic and organic phases were then analyzed to examine their acidification and neutralization characteristics in atmospheric aerosols. The mass concentrations of PM 10 and PM 2.5 at Gosan site were 37.6±20.1 and 22.9±14.3 μg/m 3 , respectively, showing the content ratio of PM 2.5 to PM 10 as 61.0%. In the evaluation of ionic balance, the correlation coefficients (r) between the sums of cationic and anionic equivalent concentrations were excellent with 0.982 (PM 10 ) and 0.991 (PM 2.5 ). The concentration ratios of PM 2.5 /PM 10 derived for nss-SO 4 2-, NO 3 -, and NH 4 + + were 0.94, 0.56, and 1.02, respectively, indicating the relative dominance of fine fractions. The acidifying capacity of inorganic anions (SO 4 2-and NO 3 -) in PM 10 and PM 2.5 were 96.5% and 97.3%, while those of organic anions (HCOO -and CH 3 COO -) in each fraction were 2.9% and 2.0%, respectively. On the other hand, the neutralizing capacity of PM 10 and PM 2.5 by NH 3 were 72.8% and 82.3%, while their CaCO 3 counter parts were 22.5% and 13.3%, respectively.