Monitoring of acid rain over Korean Peninsula

In order to investigate the temporal and spacial deposition characteristics of acid rain, five monitoring sites were set up in the central part of Kor ean Peninsula. Rainwater samples were collected by wet-only sampler from 19 92 to 1997. The pH and conductivity values were measured and the major wate r soluble ionic components were also analyzed. Ion balance between anion an d cation sum was calculated to check out the data quality of samples. The a cidity of rainwater was influenced by the local sources and meteorological factors such as surface wind, moving path of storm, precipitation process, and so on. Backward trajectories were depicted to investigate the effect du e to moving path of weather system. The rainwater shows strong acidity in w inter and weak in summer. The pH and ion concentrations were highly depende nt on synoptic weather system. In addition, we sampled fog/cloud at Mt. Sob aek (BAPMoN Station) from June to August 1995 and characterized the fog/clo ud chemistry according to surface wind system of sampling site. The volume- weighted mean pH of fog/cloud samples is 4.39 at Mt. Sobaek during the samp ling period.