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Total gaseous concentrations in mercury in Seoul, Korea: Local sources compared to long-range transport from China and Japan |
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| Authors: | Eun-Mi Choi Thomas M Holsen |
| Institution: | a Graduate School of Public Health, Department of Environmental Health, Seoul National University, Yeongon-dong, Chongro-gu, Seoul 110-799, Republic of Korea b Institute of Health and Environment, Graduate School of Public Health, Seoul National University, Yeongon-dong, Chongro-gu, Seoul 110-799, Republic of Korea c Department of Civil and Environmental Engineering, Clarkson University, Potsdam, NY 13699, USA |
| Abstract: | Total gaseous mercury (TGM) and carbon monoxide (CO) were measured every 5 min and hourly, respectively, in Seoul, Korea, from February 2005 through December 2006. The mean concentrations of TGM and CO were 3.44 ± 2.13 ng m−3 and 613 ± 323 ppbv, respectively. TGM and CO concentrations were highest during the winter and lowest during the summer. In total, 154 high TGM concentration events were identified: 86 were classified as long-range transport events and 68 were classified as local events. The TGM and CO concentrations were well correlated during all long-range transport events and were weakly correlated during local events. Five-day backward trajectory analysis for long-range transport events showed four potential source regions: China (79%), Japan (13%), the Yellow Sea (6%), and Russia (2%). Our results suggest that measured ΔTGM/ΔCO can be used to identify long-range transported mercury and to estimate mercury emissions from long-range transport. |
| Keywords: | CO ΔTGM/ΔCO High concentration event Local event Long-range transport Long-range transport event TGM |
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