기류의 유입경로가 대관령 지역 안개의 화학조성에 미치는 영향 = Effect of Air-mass Back Trajectory on the Chemical Composition of Cloud/Fog Water at Daegwallyeong

다국어 초록 (Multilingual Abstract)

Cloud/fog water was collected at Daegwallyeong, a typical clean environmental area, by using an active fogsampler during the foggy period in 2002. The pH ranged from 3.7 to 6.5 with a mean of 5.0, but the pH calculatedfrom average concentrations of H±42-, NO3- and NH4± were predominant ions with averageconcentrations of 473.3, 463.3 and 576.0eq/L, respectively. This showed that cloud/fog water was slightlyacidied, but the concentrations of major pollutants were as high as those for polluted area, suggesting effect from-h backtrajectory analysis using the Hybrid Single-Particle Largrangian Integrated Trajectory (HYSPLIT) model.Concentrations of seasalt (Na± and Cl-) were the highest for group E, indicating large input of seasalts by airmasses transported from the East Sea. The concentrations of SO42- were slightly higher in group W but thedifference was not signicant. However, the concentrations of NO3- were signicantly higher in group W thanthose in other three groups. The median values of cloud/fog water pH for group N and W were below 4.5, which issignicantly lower than median values in group E and group S. This suggests that the acidifying pollutants weretransported from the Asia continents and Seoul metropolitan area cause acidification of the cloud/fog water inDaegwallyeong.

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