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Faraday Discuss

Title:		"OH reactivity in urban and suburban regions in Seoul, South Korea - an East Asian megacity in a rapid transition"
Author(s):		Kim S; Sanchez D; Wang M; Seco R; Jeong D; Hughes S; Barletta B; Blake DR; Jung J; Kim D; Lee G; Lee M; Ahn J; Lee SD; Cho G; Sung MY; Lee YH; Kim DB; Kim Y; Woo JH; Jo D; Park R; Park JH; Hong YD; Hong JH;
Address:		"Department of Earth System Science, University of California, Irvine, Irvine CA 92697, USA. saewungk@uci.edu. Department of Chemistry, University of California, Irvine, Irvine CA 92697, USA. The Division of Metrology for Quality of Life, Korea Research Institute of Standards and Science, Daejeon, South Korea 34113. Department of Environmental Engineering, Kunsan National University, Kunsan, South Korea 573-701. Department of Environmental Sciences, Hankuk University of Foreign Studies, Yongin, South Korea 449-791. Department of Earth and Environmental Sciences, Korea University, Seoul, South Korea 02841. Department of Climate and Air Quality, National Institute of Environmental Research, Incheon, South Korea 22689. Division of Interdisciplinary Studies, Konkuk University, Seoul, South Korea 05025. School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea 08826"
Journal Title:		Faraday Discuss
Year:		2016
Volume:		189
Issue:
Page Number:		231 - 251
DOI:		10.1039/c5fd00230c
ISSN/ISBN:		1364-5498 (Electronic) 1359-6640 (Linking)
Abstract:		"South Korea has recently achieved developed country status with the second largest megacity in the world, the Seoul Metropolitan Area (SMA). This study provides insights into future changes in air quality for rapidly emerging megacities in the East Asian region. We present total OH reactivity observations in the SMA conducted at an urban Seoul site (May-June, 2015) and a suburban forest site (Sep, 2015). The total OH reactivity in an urban site during the daytime was observed at similar levels ( approximately 15 s(-1)) to those previously reported from other East Asian megacity studies. Trace gas observations indicate that OH reactivity is largely accounted for by NOX ( approximately 50%) followed by volatile organic compounds (VOCs) ( approximately 35%). Isoprene accounts for a substantial fraction of OH reactivity among the comprehensive VOC observational dataset (25-47%). In general, observed total OH reactivity can be accounted for by the observed trace gas dataset. However, observed total OH reactivity in the suburban forest area cannot be largely accounted for ( approximately 70%) by the trace gas measurements. The importance of biogenic VOC (BVOCs) emissions and oxidations used to evaluate the impacts of East Asian megacity outflows for the regional air quality and climate contexts are highlighted in this study"
Keywords:
Notes:		"PubMed-not-MEDLINEKim, Saewung Sanchez, Dianne Wang, Mark Seco, Roger Jeong, Daun Hughes, Stacey Barletta, Barbara Blake, Donald R Jung, Jinsang Kim, Deugsoo Lee, Gangwoong Lee, Meehye Ahn, Joonyoung Lee, Sang-Deok Cho, Gangnam Sung, Min-Young Lee, Yong-Hwan Kim, Dan Bi Kim, Younha Woo, Jung-Hun Jo, Duseong Park, Rokjin Park, Jeong-Hoo Hong, You-Deog Hong, Ji-Hyung eng Research Support, Non-U.S. Gov't England 2016/05/04 Faraday Discuss. 2016 Jul 18; 189:231-51. doi: 10.1039/c5fd00230c"