Chemical Composition Based Aerosol Optical Properties According to Size Distribution and Mixture Types during Smog and Asian Dust Events in Seoul, Korea
- 주제(키워드) Aerosol optical properties , smog and Asian dust , aerosol mixture , mass extinction efficiency , water soluble organic carbon
- 주제(기타) Meteorology & Atmospheric Sciences
- 설명문(일반) [Jung, Chang Hoon] Kyungin Womens Univ, Dept Hlth Management, 63 Gyeyangsan Ro, Incheon 21041, South Korea; [Lee, Ji Yi] Chosun Univ, Dept Environm Engn, Gwangju, South Korea; [Um, Junshik] Univ Illinois, Dept Atmospher Sci, Urbana, IL USA; [Lee, Seung Soo] Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA; [Kim, Yong Pyo] Ewha Womans Univ, Dept Chem Engn & Mat Sci, Seoul, South Korea
- 등재 SCIE, SCOPUS, KCI등재
- 발행기관 KOREAN METEOROLOGICAL SOC
- 발행년도 2018
- URI http://www.dcollection.net/handler/ewha/000000160162
- 본문언어 영어
- Published As http://dx.doi.org/10.1007/s13143-017-0053-0
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
This study investigated the optical properties of aerosols involved in different meteorological events, including smog and Asian dust days. Carbonaceous components and inorganic species were measured in Seoul, Korea between 25 and 31 March 2012. Based on the measurements, the optical properties of aerosols were calculated by considering composition, size distribution, and mixing state of aerosols. To represent polydisperse size distributions of aerosols, a lognormal size distribution with a wide range of geometric mean diameters and geometric standard deviations was used. For the optical property calculations, the Mie theory was used to compute single-scattering properties of aerosol particles with varying size and composition. Analysis of the sampled data showed that the water-soluble components of organic matter increased on smog days, whereas crustal elements increased on dust days. The water content significantly influenced the optical properties of aerosols during the smog days as a result of high relative humidity and an increase in the water-soluble component. The absorption coefficients depended on the aerosol mixture type and the aerosol size distributions. Therefore, to improve our knowledge on radiative impacts of aerosols, especially the regional impacts of aerosols in East Asia, accurate measurements of aerosols, such as size distribution, composition, and mixture type, under different meteorological conditions are required.
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