Contrasting trends of PM2.5 and surface-ozone concentrations in China from 2013 to 2017

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 大气污染控制中心

	Contrasting trends of PM2.5 and surface-ozone concentrations in China from 2013 to 2017
	Wang, Yonghong; Gao, Wenkang; Wang, Shuai; Song, Tao; Gong, Zhengyu; Ji, Dongsheng; Wang, Lili; Liu, Zirui; Tang, Guiqian; Huo, Yanfeng
刊名	NATIONAL SCIENCE REVIEW
	2020-08
卷号	7 期号:8 页码:1331-1339
关键词	air pollution clean-air action particulate matter surface ozone China chemical composition
ISSN号	2095-5138
英文摘要	Although much attention has been paid to investigating and controlling air pollution in China, the trends of air-pollutant concentrations on a national scale have remained unclear. Here, we quantitatively investigated the variation of air pollutants in China using long-term comprehensive data sets from 2013 to 2017, during which Chinese government made major efforts to reduce anthropogenic emission in polluted regions. Our results show a significant decreasing trend in the PM2.5 concentration in heavily polluted regions of eastern China, with an annual decrease of similar to 7% compared with measurements in 2013. The measured decreased concentrations of SO2, NO2 and CO (a proxy for anthropogenic volatile organic compounds) could explain a large fraction of the decreased PM2.5 concentrations in different regions. As a consequence, the heavily polluted days decreased significantly in corresponding regions. Concentrations of organic aerosol, nitrate, sulfate, ammonium and chloride measured in urban Beijing revealed a remarkable reduction from 2013 to 2017, connecting the decreases in aerosol precursors with corresponding chemical components closely. However, surface-ozone concentrations showed increasing trends in most urban stations from 2013 to 2017, which indicates stronger photochemical pollution. The boundary-layer height in capital cities of eastern China showed no significant trends over the Beijing-Tianjin-Hebei, Yangtze River Delta and Pearl River Delta regions from 2013 to 2017, which confirmed the reduction in anthropogenic emissions. Our results demonstrated that the Chinese government was successful in the reduction of particulate matter in urban areas from 2013 to 2017, although the ozone concentration has increased significantly, suggesting a more complex mechanism of improving Chinese air quality in the future.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44539]
专题	生态环境研究中心_大气污染控制中心
推荐引用方式 GB/T 7714	Wang, Yonghong,Gao, Wenkang,Wang, Shuai,et al. Contrasting trends of PM2.5 and surface-ozone concentrations in China from 2013 to 2017[J]. NATIONAL SCIENCE REVIEW,2020,7(8):1331-1339.
APA	Wang, Yonghong.,Gao, Wenkang.,Wang, Shuai.,Song, Tao.,Gong, Zhengyu.,...&Zhang, Yuanhang.(2020).Contrasting trends of PM2.5 and surface-ozone concentrations in China from 2013 to 2017.NATIONAL SCIENCE REVIEW,7(8),1331-1339.
MLA	Wang, Yonghong,et al."Contrasting trends of PM2.5 and surface-ozone concentrations in China from 2013 to 2017".NATIONAL SCIENCE REVIEW 7.8(2020):1331-1339.