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Sci Total Environ

Title:		Total hydroxyl radical reactivity measurements in a suburban area during AQUAS-Tsukuba campaign in summer 2017
Author(s):		Li J; Sakamoto Y; Kohno N; Fujii T; Matsuoka K; Takemura M; Zhou J; Nakagawa M; Murano K; Sadanaga Y; Nakashima Y; Sato K; Takami A; Yoshino A; Nakayama T; Kato S; Kajii Y;
Address:		"Graduate School of Global Environmental Studies, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan. Graduate School of Global Environmental Studies, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan; Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-Nihonmatsucho, Sakyo-ku, Kyoto 606-8316, Japan; Center for Regional Environmental Research, National Institute for Environmental Studies, Tsukuba City, Ibaraki 305-8506, Japan. Electronic address: sakamoto.yosuke.7a@kyoto-u.ac.jp. Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-Nihonmatsucho, Sakyo-ku, Kyoto 606-8316, Japan. Graduate School of Global Environmental Studies, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan; National Institute of Information and Communications Technology, 4-2-1 Nukui-kita, Koganei, Tokyo 184-8795, Japan. Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan. Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8538, Japan. Center for Regional Environmental Research, National Institute for Environmental Studies, Tsukuba City, Ibaraki 305-8506, Japan. Institute for Space-Earth Environmental Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan; Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14, Bunkyo-machi, Nagasaki 852-8521, Japan. Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan. Graduate School of Global Environmental Studies, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan; Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-Nihonmatsucho, Sakyo-ku, Kyoto 606-8316, Japan; Center for Regional Environmental Research, National Institute for Environmental Studies, Tsukuba City, Ibaraki 305-8506, Japan. Electronic address: kajii.yoshizumi.7e@kyoto-u.ac.jp"
Journal Title:		Sci Total Environ
Year:		2020
Volume:		20200610
Issue:
Page Number:		139897 -
DOI:		10.1016/j.scitotenv.2020.139897
ISSN/ISBN:		1879-1026 (Electronic) 0048-9697 (Linking)
Abstract:		"Missing hydroxyl radical (OH) reactivity from unknown/unmeasured trace species empirically accounts for 10%-30% of total OH reactivity and may cause significant uncertainty regarding estimation of photochemical ozone production. Thus, it is essential to unveil the missing OH reactivity for developing an effective ozone mitigation strategy. In this study, we conducted simultaneous observations of total OH reactivity and 54 reactive trace species in a suburban area as part of the Air QUAlity Study (AQUAS)-Tsukuba campaign for the summer of 2017 to gain in-depth insight into total OH reactivity in an area that experienced relatively high contributions of secondary pollutants. The campaign identified on average 35.3% of missing OH reactivity among total OH reactivity (12.9 s(-1)). In general, ozone-production potential estimation categorized ozone formation in this area as volatile organic compound (VOC)-limited conditions, and missing OH reactivity may increase ozone production potential 40% on average if considered. Our results suggest the importance of photochemical processes of both AVOCs and BVOCs for the production of missing OH reactivity and that we may underestimate the importance of reducing precursors in approach to suppressing ozone production if we ignore the contribution of their photochemical products"
Keywords:		Missing OH reactivity Ozone mitigation Ozone-production potential Ozone-production sensitivity Secondary products;
Notes:		"PubMed-not-MEDLINELi, Jiaru Sakamoto, Yosuke Kohno, Nanase Fujii, Tomihide Matsuoka, Kohei Takemura, Marina Zhou, Jun Nakagawa, Maho Murano, Kentaro Sadanaga, Yasuhiro Nakashima, Yoshihiro Sato, Kei Takami, Akinori Yoshino, Ayako Nakayama, Tomoki Kato, Shungo Kajii, Yoshizumi eng Netherlands 2020/06/22 Sci Total Environ. 2020 Oct 20; 740:139897. doi: 10.1016/j.scitotenv.2020.139897. Epub 2020 Jun 10"