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Environ Pollut

Title:		Surface O(3) photochemistry over the South China Sea: Application of a near-explicit chemical mechanism box model
Author(s):		Wang Y; Guo H; Zou S; Lyu X; Ling Z; Cheng H; Zeren Y;
Address:		"Air Quality Studies, Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong. Air Quality Studies, Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong. Electronic address: ceguohai@polyu.edu.hk. School of Marine Sciences, Sun Yat-sen University, China. Electronic address: ceszsc@mail.sysu.edu.cn. School of Atmospheric Sciences, Sun Yat-sen University, China. Department of Environmental Engineering, School of Resource and Environmental Sciences, Wuhan University, China"
Journal Title:		Environ Pollut
Year:		2018
Volume:		20171122
Issue:
Page Number:		155 - 166
DOI:		10.1016/j.envpol.2017.11.001
ISSN/ISBN:		1873-6424 (Electronic) 0269-7491 (Linking)
Abstract:		"A systematic field measurement was conducted at an island site (Wanshan Island, WSI) over the South China Sea (SCS) in autumn 2013. It was observed that mixing ratios of O(3) and its precursors (such as volatile organic compounds (VOCs), nitrogen oxides (NO(x) = NO + NO(2)) and carbon monoxide (CO)) showed significant differences on non-episode days and episode days. Additional knowledge was gained when a photochemical box model incorporating the Master Chemical Mechanism (PBM-MCM) was applied to further investigate the differences/similarities of O(3) photochemistry between non-episode and episode days, in terms of O(3)-precursor relationship, atmospheric photochemical reactivity and O(3) production. The simulation results revealed that, from non-O(3) episode days to episode days, 1) O(3) production changed from both VOC and NO(x)-limited (transition regime) to VOC-limited; 2) OH radicals increased and photochemical reaction cycling processes accelerated; and 3) both O(3) production and destruction rates increased significantly, resulting in an elevated net O(3) production over the SCS. The findings indicate the complexity of O(3) pollution over the SCS"
Keywords:		"Air Pollutants/analysis/*chemistry Carbon Monoxide/analysis China Environmental Monitoring Islands *Models, Theoretical Nitrogen Oxides/analysis Oceans and Seas Ozone/analysis/*chemistry Photochemical Processes Photochemistry Volatile Organic Compounds/an;"
Notes:		"MedlineWang, Yu Guo, Hai Zou, Shichun Lyu, Xiaopu Ling, Zhenhao Cheng, Hairong Zeren, Yangzong eng England 2017/11/28 Environ Pollut. 2018 Mar; 234:155-166. doi: 10.1016/j.envpol.2017.11.001. Epub 2017 Nov 22"