Regional classification of high PM10 concentrations in the Seoul metropolitan and Chungcheongnam-do areas, Republic of Korea
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Published:2023-08-24
Issue:9
Volume:195
Page:
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ISSN:0167-6369
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Container-title:Environmental Monitoring and Assessment
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language:en
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Short-container-title:Environ Monit Assess
Author:
Choi Woosuk,Song Min Young,Kim Jong Bum,Kim Kwanchul,Cho Chaeyoon
Abstract
AbstractSince the Seoul metropolitan area is a highly developed megacity, many people are often exposed to high concentrations of particulate matter (PM), with mean aerodynamic diameters equal to or less than 10 μm (PM10), in cold seasons. PM10 concentrations can be influenced by a combination of various factors, including meteorological conditions, anthropogenic emissions, atmospheric chemical reactions, transboundary transport, and geographic characteristics. However, the establishment of an efficient air quality management plan remains challenging due to the limited understanding of the regional PM concentration characteristics. Here, the Seoul metropolitan (Seoul, Gyeonggi-do, and Incheon) and Chungcheongnam-do (Chungcheongnam-do, Daejeon, and Sejong) areas were regionally classified to identify the spatiotemporal air quality in areas where megacities and emission sources are mixed. The four representative regions were determined using the K-means clustering method based on the temporal variations in the observed PM10 concentrations. The first cluster consisted of small cities in the southern and eastern parts of Gyeonggi-do and Chungcheongnam-do, respectively, while the second cluster consisted of Incheon, West Gyeonggi-do, and Seoul. In addition, the third and fourth clusters included West Chungcheongnam-do and East Gyeonggi-do, which are adjacent to the Yellow Sea and downstream area of the westerly wind, respectively. The characteristics of each cluster during the high PM10 concentration events are explainable by wind patterns and the local air pollutant emissions, including nitrogen oxides and sulfur oxides. The obtained regional classification was different from the provincial-level administrative division of South Korea. Therefore, the present study is expected to be a scientific basis for overcoming the limitations of air quality management in administrative districts.
Funder
Ministry of the Interior and Safety
Publisher
Springer Science and Business Media LLC
Subject
Management, Monitoring, Policy and Law,Pollution,General Environmental Science,General Medicine
Reference55 articles.
1. Aach, J., & Church, G. M. (2001). Aligning gene expression time series with time warping algorithms. Bioinformatics, 17(6), 495–508. 2. Aghabozorgi, S., Shirkhorshidi, A. S., & Wah, T. Y. (2015). Time-series clustering – A decade review. Information Systems, 53, 16–38. 3. Bae, C., Kim, B. U., Kim, H. C., Yoo, C., & Kim, S. (2019). Long-range transport influence on key chemical components of PM2.5 in the Seoul metropolitan area, South Korea, during the years 2012–2016. Atmosphere, 11(1), 48. 4. Bauer, S. E., Koch, D., Unger, N., Metzger, S. M., Shindell, D. T., & Streets, D. G. (2007). Nitrate aerosols today and in 2030: A global simulation including aerosols and tropospheric ozone. Atmospheric Chemistry and Physics, 7, 5043–5059. 5. Chang, C. T., & Tsai, C. J. (2003). A model for the relative humidity effect on the readings of the PM10 beta-gauge monitor. Journal of Aerosol Science, 34, 1685–1697.
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