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행사명 Recent increase of surface particulate matter concentrations in the Seoul Metropolitan Area, Korea
행사일자 2016-08-25 ~ 2016-08-25 / 17:00 ~ 18:00
장소 사업단 세미나실
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Recent increase of surface particulate matter concentrations in the Seoul Metropolitan Area, Korea

 

Hyun Cheol Kim1,2, Soontae Kim3*, Byeong-Uk Kim4, Chun-Sil Jin5, Songyou Hong6, Rokjin Park7, Seok-Woo Son7, Changhan Bae3, MinAh Bae3, Chang-Keun Song8, and Ariel Stein1


1 Air Resources Laboratory, National Oceanic and Atmospheric Administration, College Park, MD

2 Cooperative Institute for Climate and Satellites, University of Maryland, College Park, MD

3 Department of Environmental and Safety Engineering, Ajou University, Suwon, Korea

4 Georgia Environmental Protection Division, Atlanta, GA

5 National Centers for Environmental Prediction, National Oceanic and Atmospheric Administration, College Park, MD

6 Korea Institute of Atmospheric Prediction System, Seoul, Korea

7 Seoul National University, School of Earth and Environmental Sciences, Seoul, Korea

8 National Institute of Environmental Research, Incheon, Korea

 

 

Recent changes of surface particulate matter (PM) concentration in the Seoul Metropolitan Area (SMA), South Korea, are puzzling. The long-term trend of surface PM concentration in the SMA declined in the 2000s, but since 2012 its concentrations have tended to incline, which is coincident with frequent severe hazes in South Korea. This increase puts the Korean government’s emission reduction efforts in jeopardy. This study reports that interannual variation of surface PM concentration in South Korea is closely linked with the interannual variations of wind speed. A 12-year (2004-2015) regional air quality simulation was conducted over East Asia (27-km) and over South Korea (9-km) to assess the impact of meteorology under constant anthropogenic emissions. Simulated PM concentrations show a strong negative correlation (i.e. R=-0.86) with regional wind speed, implying that reduced regional ventilation is likely associated with more stagnant conditions that cause severe pollutant episodes in South Korea. We conclude that the current PM concentration trend in South Korea is a combination of long-term decline by emission control efforts and short-term fluctuation of regional wind speed interannual variability. When the meteorology-driven variations are removed, PM concentrations in South Korea have declined continuously even after 2012, with -1.45±0.12, -1.41±0.16, and -1.09±0.16 mg/m3 per year in Seoul, the SMA, and South Korea, respectively. 

행사명 Recent increase of surface particulate matter concentrations in the Seoul Metropolitan Area, Korea
행사일자 2016-08-25 ~ 2016-08-25 / 17:00 ~ 18:00
장소 사업단 세미나실
목적
범위