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Characteristics of long-lasting haze episodes observed in Seoul, South Korea, for 2009–2014

Title
Characteristics of long-lasting haze episodes observed in Seoul, South Korea, for 2009–2014
Authors
Lee H.-J.Kim J.E.Cha J.W.Song S.Ryoo S.-B.Kim Y.P.
Ewha Authors
김용표
SCOPUS Author ID
김용표scopus
Issue Date
2019
Journal Title
Theoretical and Applied Climatology
ISSN
0177-798XJCR Link
Citation
Theoretical and Applied Climatology vol. 136, no. 1-2, pp. 55 - 64
Keywords
Long-lasting hazePM 10 mass concentrationSeoul
Publisher
Springer-Verlag Wien
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
The meteorological, physical, chemical, and optical characteristics of long-lasting haze in Seoul were studied. Four episodes were observed between 2009 and 2014, all in winter. PM 10 mass concentration (PM 10 ), chemical species, and aerosol optical depth (AOD) were analyzed along with the synoptic meteorological conditions. During the episodes, the temporal variations of the PM 10 generally proceeded from the west along the Yellow Sea. The ground-based AOD was also high in Seoul and other sites. High AOD (MODIS) distributions were observed to move from China to Korea. The high sulfate concentration, along with the high sulfur oxidation ratio value of the third and fourth episodes (Eps. 3 and 4), respectively, corroborated the possible long-range transport of air pollutants. Stagnant meteorological conditions were a reason for the occurrence of long-lasting hazes. An anticyclone system had a dominant influence on the Korean peninsula during all episodes. The air mass over China was able to rise, and that over Korea was more stagnant in terms of climatology except Ep. 2. In addition to transport from outside, locally emitted air pollutants contributed to the PM 10 partly due to the stagnant conditions, during which diurnal variations in NO 2 and nitrates showed similar peak times during Eps. 3 and 4. Analysis of the episodes consistently showed that the long-lasting haze episodes were influenced by both the long-range transport of air pollutants from outside Seoul, mostly from China, and the accumulation of air pollutants that were locally emitted and transformed. © 2018, Springer-Verlag GmbH Austria, part of Springer Nature.
DOI
10.1007/s00704-018-2415-7
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엘텍공과대학 > 화학신소재공학전공 > Journal papers
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