气候变化领域集成服务门户(CCPortal): Contrasting effects of emission control on air pollution in Central China during the 2019 Military World Games based on satellite and ground observations

CCPortal

DOI	10.1016/j.atmosres.2021.105657
	Contrasting effects of emission control on air pollution in Central China during the 2019 Military World Games based on satellite and ground observations
	Tao M.; Huang H.; Chen N.; Ma F.; Wang L.; Chen L.; Wang L.; Zhang L.; Xiang J.; Kong H.; Gui L.
发表日期	2021
ISSN	0169-8095
卷号	259
英文摘要	To ensure a good air quality during the 7th Military World Games (MWG) held in the megacity, Wuhan of central China, an unprecedented substantial emission reduction has been conducted during October 13–27, 2019. Here we present an observational overview on the effects of emission control measures as well as their implications by integrated satellite observations and surface measurements. Compared with air quality before control, there is a remarkable overall decline (~15–30%) in PM10 and SO2 concentration in control period. By contrast, NOx and O3 remain at high levels under persistent stagnant weather conditions since vehicle emission is not restricted. Despite high NOx (~100 μg/m3) in ground measurements, satellite column NO2 exhibits a considerable decline (~30–50%) over Wuhan, indicating that the large reduction of industrial emission from elevated chimneys has limited effects on changes of NOx near surface. The NO3− and NH4+ in PM2.5 reach peak values at the beginning of emergency control period, and then decrease steadily with a rising temperature. Meanwhile, OC and EC in PM2.5 have a continuous accumulation process on the premise of enhanced emission control, which can be caused by vehicle emissions. Generally, the stringent emission reduction focusing on industrial sources obviously mitigates particle pollution in Wuhan. Considering complicated relationship between atmospheric pollutants and their precursors, synchronized emission reduction measures based on their accurate roles are necessary in improving air quality effectively. © 2021 Elsevier B.V.
英文关键词	Air quality; Central China; Emission control; Satellite
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236713
作者单位	Key Laboratory of Regional Ecology and Environmental Change, School of Geography and Information Engineering, China University of Geosciences, Wuhan, 430074, China; The Ecology and Environment Monitoring Center of Hubei Province, Wuhan, 430070, China; The Ministry of Ecology and Environment Center for Satellite Application on Ecology and Environment, Beijing, 100094, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; State Key Laboratory of Remote Sensing Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, 100101, China
推荐引用方式 GB/T 7714	Tao M.,Huang H.,Chen N.,et al. Contrasting effects of emission control on air pollution in Central China during the 2019 Military World Games based on satellite and ground observations[J],2021,259.
APA	Tao M..,Huang H..,Chen N..,Ma F..,Wang L..,...&Gui L..(2021).Contrasting effects of emission control on air pollution in Central China during the 2019 Military World Games based on satellite and ground observations.Atmospheric Research,259.
MLA	Tao M.,et al."Contrasting effects of emission control on air pollution in Central China during the 2019 Military World Games based on satellite and ground observations".Atmospheric Research 259(2021).