제주도 고산에서의 1994년 여름 측정: (Ⅰ)입자 이온 조성 = Measurements at Kosan, Cheju Island during the Summer, 1994: (I) Aersol Ion Composition

다국어 초록 (Multilingual Abstract)

Aerosol measurements were carried out at Kosan, cheju Island, Korea for the period form July 20 to August 10, 1994. Total suspended particles were collected by high volume samplers and PM2.5 particles with gaseous volatile species were collected by a filter pack sampler and their ionic composition are analyzed. The average mass concentration of PM2.5 particles was comparable to that of PM3 particles collected during March, 1994 at the same site but the average non sea-salt sulfate concentration was higher than that of PM3 particles, implying the fraction of anthropogenic air pollutants during this period is higher than that during March, 1994. During the measurement period, two distinctive patterns were observed, high concentrations of mass and water soluble ions were observed between July 20 and August 1 while those during after August 2 were low. Back trajectory analysis results show that air masses arriving at Kosan during the earlier period were mainly from Korea and Japan while those during the later period were from the North Pacific Ocean. It is suggested that the particle ion concentrations during the later period are marine background concentrations at Kosan during the summertime.