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남동권 초고농도 미세먼지 발생 특성과 비상저감조치 - 수도권과 비교연구 (II)
최다니엘,허국영,김철희,Choi, Daniel,Heo, Gook-Young,Kim, Cheol-Hee 한국환경과학회 2021 한국환경과학회지 Vol.30 No.10
This study analyzed the characteristics of high PM<sub>2.5</sub> episodes that meets the concentration criteria of Emergency Reduction Measures Plan (ERMP) in Busan during the 2015-2020, and compared with those in Seoul. As a first step, the CAPSS-2017 emission data was employed to analyze the emission differences between Busan and Seoul, and pointed out that Busan emission included the dominance of ship emissions (37.7%) among total PM<sub>2.5</sub> city emissions, whereas fugitive PM<sub>2.5</sub> emission was the highest in Seoul. These emission characteristics are indicating that the controlling action plan should be uniquely applied to cope with ERMP in each region. We selected extremely high PM<sub>2.5</sub> episode days that meet the criteria of ERMP levels. In Busan, Ulsan, and Gyeongnam region, 15, 16, and 8 days of extremely high PM<sub>2.5</sub> cases were found, respectively, whereas Seoul showed approximately doubling of occurrences with 37 cases. However, the occurrences in summer season indicated big differences between two cities: the proportion of summer-season occurrence was 13-25% in Busan, whereas no single case have occurred in Seoul. This is suggesting the needs of comprehensive summer emission reduction plan with focusing on sulfur reduction to effectively cope with the ERMP levels in summer in the southeastern region, including Busan.