气候变化领域集成服务门户(CCPortal): Significant wintertime PM2.5 mitigation in the Yangtze River Delta, China, from 2016 to 2019: Observational constraints on anthropogenic emission controls

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DOI	10.5194/acp-20-14787-2020
	Significant wintertime PM2.5 mitigation in the Yangtze River Delta, China, from 2016 to 2019: Observational constraints on anthropogenic emission controls
	Wang L.; Yu S.; Li P.; Chen X.; Li Z.; Zhang Y.; Li M.; Mehmood K.; Liu W.; Chai T.; Zhu Y.; Rosenfeld D.; Seinfeld J.H.
发表日期	2020
ISSN	1680-7316
起始页码	14787
结束页码	14800
卷号	20 期号:23
英文摘要	Ambient fine particulate matter (PM2:5) mitigation relies strongly on anthropogenic emission control measures, the actual effectiveness of which is challenging to pinpoint owing to the complex synergies between anthropogenic emissions and meteorology. Here, observational constraints on model simulations allow us to derive not only reliable PM2:5 evolution but also accurate meteorological fields. On this basis, we isolate meteorological factors to achieve reliable estimates of surface PM2:5 responses to both longterm and emergency emission control measures from 2016 to 2019 over the Yangtze River Delta (YRD), China. The results show that long-Term emission control strategies play a crucial role in curbing PM2:5 levels, especially in the megacities and other areas with abundant anthropogenic emissions. The G20 summit hosted in Hangzhou in 2016 provides a unique and ideal opportunity involving the most stringent, even unsustainable, emergency emission control measures. These emergency measures lead to the largest decrease (35 ugm3, 59 %) in PM2:5 concentrations in Hangzhou. The hotspots also emerge in megacities, especially in Shanghai (32 ugm3, 51 %), Nanjing (27 ugm3, 55 %), and Hefei (24 ugm3, 44 %) because of the emergency measures. Compared to the long-Term policies from 2016 to 2019, the emergency emission control measures implemented during the G20 Summit achieve more significant decreases in PM2:5 concentrations (17 ugm3 and 41 %) over most of the whole domain, especially in Hangzhou (24 ugm3, 48 %) and Shanghai (21 ugm3, 45 %). By extrapolation, we derive insight into the magnitude and spatial distribution of PM2:5 mitigation potential across the YRD, revealing significantly additional room for curbing PM2:5 levels. © 2020 BMJ Publishing Group. All rights reserved.
语种	英语
scopus关键词	ambient air; anthropogenic source; megacity; particulate matter; spatial distribution; winter; Anhui; China; Hangzhou; Hefei; Jiangsu; Nanjing [Jiangsu]; Shanghai; Yangtze Delta; Zhejiang
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/247317
作者单位	Research Center for Air Pollution and Health, Key Laboratory of Environmental Remediation and Ecological Health, Ministry of Education, College of Environment and Resource Sciences, Zhejiang University, Hangzhou, Zhejiang, 310058, China; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, United States; College of Science and Technology, Hebei Agricultural University, Baoding, Hebei, 071000, China; Air Resources Laboratory, NOAA, Cooperative Institute for Satellite Earth System Studies (CISESS), University of Maryland, College Park, United States; Meteorological Institute of Shananxi Province, 36 Beiguanzhengjie, Xi'an, 710015, China; Institute of Earth Science, Hebrew University of Jerusalem, Jerusalem, Israel
推荐引用方式 GB/T 7714	Wang L.,Yu S.,Li P.,et al. Significant wintertime PM2.5 mitigation in the Yangtze River Delta, China, from 2016 to 2019: Observational constraints on anthropogenic emission controls[J],2020,20(23).
APA	Wang L..,Yu S..,Li P..,Chen X..,Li Z..,...&Seinfeld J.H..(2020).Significant wintertime PM2.5 mitigation in the Yangtze River Delta, China, from 2016 to 2019: Observational constraints on anthropogenic emission controls.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(23).
MLA	Wang L.,et al."Significant wintertime PM2.5 mitigation in the Yangtze River Delta, China, from 2016 to 2019: Observational constraints on anthropogenic emission controls".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.23(2020).