气候变化领域集成服务门户(CCPortal): A two-pollutant strategy for improving ozone and particulate air quality in China

CCPortal

DOI	10.1038/s41561-019-0464-x
	A two-pollutant strategy for improving ozone and particulate air quality in China
	Li K.; Jacob D.J.; Liao H.; Zhu J.; Shah V.; Shen L.; Bates K.H.; Zhang Q.; Zhai S.
发表日期	2019
ISSN	17520894
卷号	12 期号:11
英文摘要	Fine particulate matter (PM2.5) decreased by 30–40% across China during 2013–2017 in response to the governmental Clean Air Action. However, surface ozone pollution worsened over the same period. Model simulations have suggested that the increase in ozone could be driven by the decrease in PM2.5, because PM2.5 scavenges hydroperoxy (HO2) and NOx radicals that would otherwise produce ozone. Here we show observational evidence for this effect with 2013–2018 summer data of hourly ozone and PM2.5 concentrations from 106 sites in the North China Plain. The observations show suppression of ozone pollution at high PM2.5 concentrations, consistent with a model simulation in which PM2.5 scavenging of HO2 and NOx depresses ozone concentrations by 25 ppb relative to PM2.5-free conditions. PM2.5 chemistry makes ozone pollution less sensitive to NOx emission controls, emphasizing the need for controlling emissions of volatile organic compounds (VOCs), which so far have not decreased in China. The new 2018–2020 Clean Air Action plan calls for a 10% decrease in VOC emissions that should begin to reverse the long-term ozone increase even as PM2.5 continues to decrease. Aggressive reduction of NOx and aromatic VOC emissions should be particularly effective for decreasing both PM2.5 and ozone. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	action plan; air quality; atmospheric pollution; concentration (composition); emission control; ozone; particulate matter; scavenging (chemistry); China; North China Plain
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124566
作者单位	Harvard-NUIST Joint Laboratory for Air Quality and Climate, Nanjing University of Information Science and Technology, Nanjing, China; Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States; Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, China; Department of Earth System Science, Tsinghua University, Beijing, China
推荐引用方式 GB/T 7714	Li K.,Jacob D.J.,Liao H.,et al. A two-pollutant strategy for improving ozone and particulate air quality in China[J],2019,12(11).
APA	Li K..,Jacob D.J..,Liao H..,Zhu J..,Shah V..,...&Zhai S..(2019).A two-pollutant strategy for improving ozone and particulate air quality in China.Nature Geoscience,12(11).
MLA	Li K.,et al."A two-pollutant strategy for improving ozone and particulate air quality in China".Nature Geoscience 12.11(2019).