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- Title
Meteorological Characteristics and Assessment of the Effect of Local Emissions during High PM<sub>10</sub> Concentration in the Seoul Metropolitan Area.
- Authors
Il-Soo Park; Hyeon-Kook Kim; Chang-Keun Song; Yu-Woon Jang; Sang-Heon Kim; Chang-Rae Cho; Owen, Jeffrey S.; Cheol-Hee Kim; Kyung-Won Chung; Moon-Soo Park
- Abstract
In this study, we investigate the meteorological characteristics and the effect of local emissions during high PM10 concentrations in the Seoul Metropolitan Area (SMA) by utilizing data from a high-resolution urban meteorological observation system network (UMS-Seoul) and The Air Pollution Model (TAPM). For a detailed analysis, days with PM10 concentrations higher than 80 µg m-3 for daily average PM10 concentration (classified as unhealthy by the Korean Ministry of Environment) in the Seoul Metropolitan Area (SMA) were classified into 3 Cases. Case I was defined as when the prevailing effect was from outside the SMA. Case II was defined as when the prevailing effect was a local effect with outside. Case III was defined as when the prevailing effect was local. Overall, high PM10 concentrations in the SMA mostly occurred under weak migratory anticyclone systems over the Korean Peninsula during warm temperatures. Prior to the PM10 concentration reaching the peak concentration, the pattern in each case was distinctive. After peak concentrations, however, the pattern for the 3 cases became less distinct. This study showed that nearly 50% of the high PM10 concentrations in the SMA occurred in spring and were governed by the conditions for Case II more than these for Cases I and III. In spring, the main sources of the high PM10 concentrations in the SMA were local emissions due to the predominance of weak winds and local circulation. The simulation showed that the non-SMA emissions were about 63 to 73% contribution to the spring high PM10 concentrations in the SMA. Specifically, local point sources including industrial combustion, electric utility, incineration and cement production facilities scattered around the SMA and could account for PM10 concentrations more than 10 µg m-3 in the SMA.
- Subjects
KOREA; METROPOLITAN areas; ATMOSPHERIC circulation; METEOROLOGICAL observations; AIR pollution; INCINERATION; CARBONACEOUS aerosols
- Publication
Asian Journal of Atmospheric Environment (AJAE), 2019, Vol 13, Issue 2, p117
- ISSN
1976-6912
- Publication type
Article
- DOI
10.5572/ajae.2019.13.2.117