Long-range transport for dryacidic deposition over South Korea has been estimated using a simplified chemical model and the K-mean clustering technique. The three consecutive dailymean National Center for Environmental Protection reanalyzed 850 hPa geopotential height fields without precipitation on the last day over South Korea are used for clustering of synoptic patterns for the period of 1994?1998. Two emission conditions are simulated for each cluster to estimate long-term impact bylong-range transport for acidic dry deposition over South Korea. One condition takes all emissions within the simulated domain into account as a base case and the other condition excludes South Korea’s emission and all oxidizers and considering all of the other emissions as a control case. The results of the present studyindicate that the contribution of long-range transport to the annual total South Korea’s dry deposition of sulfur is found to be about 30% (78 eq ha?¹yr?¹), of which 65% and 35% are contributed by SO₂ and SO²?₄ ; respectively, whereas that of total nitrogen deposition is found to be 49% (240 eq ha?¹yr?¹), of which 80% and 20% are contributed bythe transformed nitrogen species including HNO₃, NH?₄ and NO?₃ ; and the primarypollutants of NO<SUB>x</SUB> and NH₃; respectively, suggesting the importance of secondary pollutants of nitrogen species for long-range transport to South Korea’s total drydeposition of nitrogen.<BR> ⓒ 2003 Elsevier Ltd. All rights reserved.
Abstract<BR>1. Introduction<BR>2. Data and methodology<BR>3. Results<BR>4. Summary and conclusions<BR>Acknowledgements<BR>References<BR>
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