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Chemical Composition Based Aerosol Optical Properties According to Size Distribution and Mixture Types during Smog and Asian Dust Events in Seoul, Korea

Title
Chemical Composition Based Aerosol Optical Properties According to Size Distribution and Mixture Types during Smog and Asian Dust Events in Seoul, Korea
Authors
Jung, Chang HoonLee, Ji YiUm, JunshikLee, Seung SooKim, Yong Pyo
Ewha Authors
김용표
SCOPUS Author ID
김용표scopus
Issue Date
2018
Journal Title
ASIA-PACIFIC JOURNAL OF ATMOSPHERIC SCIENCES
ISSN
1976-7633JCR Link1976-7951JCR Link
Citation
vol. 54, no. 1, pp. 19 - 32
Keywords
Aerosol optical propertiessmog and Asian dustaerosol mixturemass extinction efficiencywater soluble organic carbon
Publisher
KOREAN METEOROLOGICAL SOC
Indexed
SCIE; SCOPUS; KCI WOS scopus
Abstract
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.
DOI
10.1007/s13143-017-0053-0
Appears in Collections:
엘텍공과대학 > 화학신소재공학전공 > Journal papers
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