气候变化领域集成服务门户(CCPortal): Significant reduction of PM2.5 in eastern China due to regional-scale emission control: Evidence from SORPES in 2011-2018

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DOI	10.5194/acp-19-11791-2019
	Significant reduction of PM2.5 in eastern China due to regional-scale emission control: Evidence from SORPES in 2011-2018
	Ding A.; Huang X.; Nie W.; Chi X.; Xu Z.; Zheng L.; Xu Z.; Xie Y.; Qi X.; Shen Y.; Sun P.; Wang J.; Wang L.; Sun J.; Yang X.-Q.; Qin W.; Zhang X.; Cheng W.; Liu W.; Pan L.; Fu C.
发表日期	2019
ISSN	16807316
起始页码	11791
结束页码	11801
卷号	19 期号:18
英文摘要	Haze pollution caused by PM2.5 is the largest air quality concern in China in recent years. Long-term measurements of PM2.5 and the precursors and chemical speciation are crucially important for evaluating the efficiency of emission control, understanding formation and transport of PM2.5 associated with the change of meteorology, and accessing the impact of human activities on regional climate change. Here we reported long-term continuous measurements of PM2.5, chemical components, and their precursors at a regional background station, the Station for Observing Regional Processes of the Earth System (SORPES), in Nanjing, eastern China, since 2011. We found that PM2.5 at the station has experienced a substantial decrease (-9.1%yr-1), accompanied by even a very significant reduction of SO2 (-16.7%yr-1), since the national "Ten Measures of Air" took action in 2013. Control of open biomass burning and fossil-fuel combustion are the two dominant factors that influence the PM2.5 reduction in early summer and winter, respectively. In the cold season (November-January), the nitrate fraction was significantly increased, especially when air masses were transported from the north. More NH3 available from a substantial reduction of SO2 and increased oxidization capacity are the main factors for the enhanced nitrate formation. The changes of year-to-year meteorology have contributed to 24% of the PM2.5 decrease since 2013. This study highlights several important implications on air pollution control policy in China. © Author(s) 2019.
语种	英语
scopus关键词	air quality; atmospheric pollution; climate change; concentration (composition); emission control; haze; particulate matter; pollution policy; seasonal variation; speciation (chemistry); China; Jiangsu; Nanjing [Jiangsu]
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/144140
作者单位	Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, Nanjing, 210023, China; Jiangsu Provincial Collaborative Innovation Center of Climate Change, Nanjing, 210023, China; Jiangsu Environmental Monitoring Center, Department of Ecology and Environment of Jiangsu Province, Nanjing, 210036, China; Department of Ecology and Environment of Jiangsu Province, Nanjing, 210036, China; Jiangsu Provincial Academy of Environmental Science, Department of Ecology and Environment of Jiangsu Province, Nanjing, 210036, China
推荐引用方式 GB/T 7714	Ding A.,Huang X.,Nie W.,et al. Significant reduction of PM2.5 in eastern China due to regional-scale emission control: Evidence from SORPES in 2011-2018[J],2019,19(18).
APA	Ding A..,Huang X..,Nie W..,Chi X..,Xu Z..,...&Fu C..(2019).Significant reduction of PM2.5 in eastern China due to regional-scale emission control: Evidence from SORPES in 2011-2018.Atmospheric Chemistry and Physics,19(18).
MLA	Ding A.,et al."Significant reduction of PM2.5 in eastern China due to regional-scale emission control: Evidence from SORPES in 2011-2018".Atmospheric Chemistry and Physics 19.18(2019).