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http://dx.doi.org/10.5572/KOSAE.2015.31.2.131

Physical, Chemical and Optical Properties of an Asian Dust and Haze Episodes Observed at Seoul in 2010  

Song, Seungjoo (Asian Dust Research Laboratory, National Institute of Meteorological Research)
Kim, Jeong Eun (Asian Dust Research Laboratory, National Institute of Meteorological Research)
Lim, Eunha (Asian Dust Research Laboratory, National Institute of Meteorological Research)
Cha, Joo-Wan (Asian Dust Research Laboratory, National Institute of Meteorological Research)
Kim, Jhoon (Department of Atmospheric Sciences, Yonsei University)
Publication Information
Journal of Korean Society for Atmospheric Environment / v.31, no.2, 2015 , pp. 131-142 More about this Journal
Abstract
This study investigated physicochemical and optical characteristics for three episodes of Asian dust, stagnant haze and long-range transport haze and for one clean day. $PM_{10}$ mass concentration during Asian dust and two haze days was increased by 2~9 times compared to that of clean episode. During Asian dust episode, coarse particle concentration was increased and the mass concentration of calcium in a coarse mode ($1.8{\sim}10{\mu}m$) was $5.4{\mu}g/m^3$ which was 7 times higher than that of clean episode. The calcium was presented as a form of $CaCO_3$ in a coarse mode. During the two haze episodes, fine particle (< $1.8{\mu}m$) concentration was increased and secondary inorganic pollutants such as sulfate, ammonium and nitrate composed of 90% of the total ions. $(NH_4)_2SO_4$ and $NH_4NO_3$ were dominant in a fine mode for stagnant haze episode. But they were the most dominant form in both fine mode and coarse mode for long-range transport haze episode. According to the optical properties for each episode (Asian dust, stagnant haze and long-range transport haze) were classified as dust, black carbon and mixture, respectively.
Keywords
Dust; Haze; Aerosol type; Fine particle; Coarse particle;
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Times Cited By KSCI : 8  (Citation Analysis)
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