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Estimation of Optical Properties for HULIS Aerosols at Anmyeon Island, Korea

Title
Estimation of Optical Properties for HULIS Aerosols at Anmyeon Island, Korea
Authors
Lee, Ji YiJung, Chang HoonKim, Yong Pyo
Ewha Authors
김용표
SCOPUS Author ID
김용표scopus
Issue Date
2017
Journal Title
ATMOSPHERE
ISSN
2073-4433JCR Link
Citation
vol. 8, no. 7
Keywords
humic-like substances (HULIS)optical propertiesradiative forcinghygroscopic growth factorlight absorption
Publisher
MDPI AG
Indexed
SCIE; SCOPUS WOS scopus
Abstract
In this study, the sensitivity of the optical properties of carbonaceous aerosols, especially humic-like substances (HULIS), are investigated based on a one-year measurement of ambient fine atmospheric particulate matter (PM2.5) at a Global Atmospheric Watch (GAW) station in South Korea. The extinction, absorption coefficient, and radiative forcing (RF) are calculated from the analysis data of water soluble (WSOC) and insoluble (WISOC) organic aerosols, elemental carbon (EC), and HULIS. The sensitivity of the optical properties on the variations of refractive index, hygroscopicity, and light absorption properties of HULIS as well as the polydispersity of organic aerosols are studied. The results showed that the seasonal absorption coefficient of HULIS varied from 0.09 to 11.64 Mm(-1) and EC varied from 0.11 to 3.04 Mm(-1) if the geometric mean diameter varied from 0.1 to 1.0 mu m and the geometric standard deviation varied from 1.1 to 2.0, with the imaginary refractive index (IRI) of HULIS varying from 0.006 to 0.3. Subsequently, this study shows that the RF of HULIS was larger than other constituents, which suggested that HULIS contributed significantly to radiative forcing.
DOI
10.3390/atmos8070120
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엘텍공과대학 > 화학신소재공학전공 > Journal papers
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