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Cho, Kyung Hwa
Water-Environmental Informatics Lab (WEIL)
Research Interests
  • Water Quality Monitoring and Modeling, Water Treatment Process Modeling

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When river water meets seawater: Insights into primary marine aerosol production

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Title
When river water meets seawater: Insights into primary marine aerosol production
Author
Park, JiyeonJang, JiyiYoon, Young JunKang, SujinKang, HyojinPark, KihongCho, Kyung HwaKim, Jung-HyunDall'Osto, ManuelLee, Bang Yong
Issue Date
2022-02
Publisher
ELSEVIER
Citation
SCIENCE OF THE TOTAL ENVIRONMENT, v.807, pp.150866
Abstract
The impact of inorganic salts and organic matter (OM) on the production of primary marine aerosols is still under debate. To constrain their impact, we investigated primary aerosols generated by a sea-spray generator chamber using surface water samples from rivers, estuaries, and seas that were collected along salinity gradients in two temperate Korean coastal systems and one Arctic coastal system. Salinity values showed an increasing trend along the river-estuary-coastal water transition, indicating the lowest amount of inorganic salts in the river but the highest amount in the sea. In river samples, the lowest number concentration of primary aerosol particles (1.01 x 10(3) cm(-3)) was observed at the highest OM content, suggesting that low salinity controls aerosol production. Moreover, the number concentration of primary aerosols increased drastically in estuarine (1.13 x 10(4) cm(-3)) and seawater (1.35 x 10(4) cm(-3)) samples as the OM content decreased. Our results indicate that inorganic salts associated with increasing salinity play a much larger role than OM in aerosol production in river-dominated coastal systems. Laboratory studies using NaCl solution supported the conclusion that inorganic salt is a critical factor in modulating the particles produced from river water and seawater. Accordingly, this study highlights that inorganic salts are a critical factor in modulating the production of primary marine aerosols. (C) 2021 The Authors. Published by Elsevier B.V.
URI
https://scholarworks.unist.ac.kr/handle/201301/54860
URL
https://www.sciencedirect.com/science/article/pii/S0048969721059441?via%3Dihub
DOI
10.1016/j.scitotenv.2021.150866
ISSN
0048-9697
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