气候变化领域集成服务门户(CCPortal): Impact of international shipping emissions on ozone and PM2.5 in East Asia during summer: The important role of HONO and ClNO2

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DOI	10.5194/acp-21-8747-2021
	Impact of international shipping emissions on ozone and PM2.5 in East Asia during summer: The important role of HONO and ClNO2
	Dai J.; Wang T.
发表日期	2021
ISSN	1680-7316
起始页码	8747
结束页码	8759
卷号	21 期号:11
英文摘要	Ocean-going ships emit large amounts of air pollutants such as nitrogen oxide (NOix/i) and particulate matter. NOix/i emitted from ships can be converted to nitrous acid (HONO) and nitryl chloride (ClNO2), which produce hydroxyl (OH) and chlorine (Cl) radicals and recycle NOix/i, thereby affecting the oxidative capacity and production of secondary pollutants. However, these effects have not been quantified in previous investigations of the impacts of ship emissions. In this study, a regional transport model (WRF-Chem) revised to incorporate the latest HONO and ClNO2 processes was used to investigate their effects on the concentrations of ROix/i (RO2 + HO2 + OH) radicals, ozone (O3), and fine particulate matter (PM2.5) in Asia during summer. The results show that the ship-derived HONO and ClNO2 increased the concentration of ROix/i radicals by approximately 2-3 times in the marine boundary layer. The enhanced radicals then increased the O3 and PM2.5 concentrations in marine areas, with the ship contributions increasing from 9 % to 21 % and from 7 % to 10 % respectively. The largest ROix/i enhancement was simulated over the remote ocean with the ship contribution increasing from 29 % to 50 %, which led to increases in ship-contributed O3 and PM2.5 from 21 % to 38 % and from 13 % to 19 % respectively. In coastal cities, the enhanced levels of radicals also increased the maximum O3 and averaged PM2.5 concentrations from 5 % to 11 % and from 4 %-8 % to 4 %-12 % respectively. These findings indicate that modelling studies that do not consider HONO and ClNO2 can significantly underestimate the impact of ship emissions on radicals and secondary pollutants. Therefore, it is important that these nitrogen compounds be included in future models of the impact of ship emissions on air quality. © Copyright:
语种	英语
scopus关键词	atmospheric pollution; chloride; chlorine; emission; hydroxide; nitrogen oxides; nitrous acid; ozone; particulate matter; shipping; summer; Far East
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246822
作者单位	Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, 999077, Hong Kong
推荐引用方式 GB/T 7714	Dai J.,Wang T.. Impact of international shipping emissions on ozone and PM2.5 in East Asia during summer: The important role of HONO and ClNO2[J],2021,21(11).
APA	Dai J.,&Wang T..(2021).Impact of international shipping emissions on ozone and PM2.5 in East Asia during summer: The important role of HONO and ClNO2.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(11).
MLA	Dai J.,et al."Impact of international shipping emissions on ozone and PM2.5 in East Asia during summer: The important role of HONO and ClNO2".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.11(2021).