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Atmosphere 2017, 8(7), 120; doi:10.3390/atmos8070120

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

Department of Environmental Engineering, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju 501-759, Korea
Department of Health Management, Kyungin Women’s University, 101 Gesan-gil, Gyeyang-gu, Incheon 407-740, Korea
Department of Chemical Engineering and Materials Science, Ewha Womans University, 11-1 Daehyun-dong, Seodaemun-gu, Seoul 120-750, Korea
Author to whom correspondence should be addressed.
Received: 8 May 2017 / Revised: 29 June 2017 / Accepted: 4 July 2017 / Published: 7 July 2017
(This article belongs to the Special Issue Carbonaceous Aerosols in Atmosphere)
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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 µm 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. View Full-Text
Keywords: humic-like substances (HULIS); optical properties; radiative forcing; hygroscopic growth factor; light absorption humic-like substances (HULIS); optical properties; radiative forcing; hygroscopic growth factor; light absorption

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Lee, J.Y.; Jung, C.H.; Kim, Y.P. Estimation of Optical Properties for HULIS Aerosols at Anmyeon Island, Korea. Atmosphere 2017, 8, 120.

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