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http://dx.doi.org/10.4491/KSEE.2016.38.5.269

Seasonal Nitrogen Oxides Improvement due to On-road Mobile Air Pollution Source Emission Control Plan in Seoul Metropolitan Area  

Kim, Yoo Jung (Social Eco-Tech Institute, Konkuk University)
Jeong, Hye-Seon (Department of Advanced Technology Fusion, Konkuk University)
Kim, Suhyang (Department of Advanced Technology Fusion, Konkuk University)
Ma, Young-Il (Department of Advanced Technology Fusion, Konkuk University)
Lee, Woo-Keun (Department of Environmental Engineering, Kangwon National University)
Kim, Jeongsoo (Transportation pollution research Center, National Institute of Environmental Research)
Sunwoo, Young (Department of Environmental Engineering, Konkuk University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.38, no.5, 2016 , pp. 269-278 More about this Journal
Abstract
In order to improve air quality in the Seoul Metropolitan Area (SMA), the "Special Act on Seoul Metropolitan Air Quality Improvement" has been enforced since 2005. The strategy has resulted in some reduction of air pollution, but there has not been much research into the quantitative impact analysis of each separate preventive countermeasure. Therefore, we analyzed nitrogen oxide reduction resulting from implementation of the emission control plan for on-road mobile sources. The MM5-SMOKE-CMAQ model system was employed for air quality prediction. Reduced $NO_x$ emissions for SMA was 16,561 ton, 4.7% of reduction rate, in 2007. One countermeasure, tighter acceptable standards for manufacturing vehicles, dominated other countermeasures for effective $NO_x$ emission control. Large spatial differences in reduced emissions, those for Seoul being twice that of Incheon and Gyeonggi, showed greater $NO_x$ emission reduction impact in the heart of the metropolitan complex. The $NO_2$ concentration decreased by 0.60 ppb (2.0%), 0.18 ppb (1.5%), and 0.22 ppb (1.7%) in Seoul, Incheon, and Gyeonggi, respectively. Concentration decreases in spring and winter were larger, 1.5~2.0 times, than summer and fall. However, the $NO_2$ reduction impact did not correspond directly to local $NO_x$ emission controls in the city area because of the natural flow and dispersion, both urban and downwind.
Keywords
On-road Mobile Source; CMAQ; $NO_x$; Special Act on Seoul Metropolitan Air Quality Improvement;
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