气候变化领域集成服务门户(CCPortal): Effectiveness of emission control in reducing PM2.5 pollution in central China during winter haze episodes under various potential synoptic controls

CCPortal

DOI	10.5194/acp-21-3143-2021
	Effectiveness of emission control in reducing PM2.5 pollution in central China during winter haze episodes under various potential synoptic controls
	Yan Y.; Zhou Y.; Kong S.; Lin J.; Wu J.; Zheng H.; Zhang Z.; Song A.; Bai Y.; Ling Z.; Liu D.; Zhao T.
发表日期	2021
ISSN	1680-7316
起始页码	3143
结束页码	3162
卷号	21 期号:4
英文摘要	Currently, mitigating severe particle pollution in autumn and winter is the key to further improving the air quality of China. The source contributions and transboundary transport of fine particles (PM2.5) in pollution episodes are closely related to large-scale or synoptic-scale atmospheric circulation. How to effectively reduce emissions to control haze pollution under different synoptic conditions is rarely reported. In this study, we classify the synoptic conditions over central China from 2013 to 2018 by using Lamb-Jenkinson method and the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) Final (FNL) operational global analysis data. The effectiveness of emission control to reduce PM2.5 pollution during winter haze episodes under potential synoptic controls is simulated by GEOS-Chem model. Among the 10 identified synoptic patterns, four types account for 87 % of the total pollution days. Two typical synoptic modes are characterized by low surface wind speed and stable weather conditions or high relative humidity (A or C type) over central China due to a high-pressure system or a southwest trough and low-pressure system, blocking pollutants dispersion. Sensitivity simulations show that these two heavy pollution processes are mainly contributed by local emission sources with ∼82 % for A type and ∼85 % for C type, respectively. The other two patterns lead to pollution of transport characteristics affected by northerly or southerly winds (NW or SW type), carrying air pollution from northern or southern China to central China. The contribution of pollution transmission from northern and southern China is 36.9 % and 7.6 %, respectively of PM2.5, and local emission sources contribute 41 % and 69 %, respectively. We also estimate the effectiveness of emission reduction in these four typical severe pollution synoptic processes. By only reducing SO2 and NOx emission and not controlling NH3, the enhanced nitrate counteracts the effect of sulfate reduction on PM2.5 mitigation, with a less than 4 % decrease in PM2.5. In addition, to effectively mitigate haze pollution of NW- and SW-type synoptic-controlled episodes, local emission control actions should be in coordination with regional collaborative actions. © 2021 BMJ Publishing Group. All rights reserved.
语种	英语
scopus关键词	air quality; atmospheric circulation; atmospheric pollution; emission control; haze; particulate matter; pollutant transport; synoptic meteorology; China
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/247098
作者单位	Department of Atmospheric Sciences, School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China; Hubei Key Laboratory for Heavy Rain Monitoring and Warning Research, Institute of Heavy Rain, China Meteorological Administration, Wuhan, 430205, China; Department of Environmental Science and Engineering, School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China; Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, 100871, China; Department of Atmospheric Sciences, School of Earth Sciences, Zhejiang University, Hangzhou, 310058, China; School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, 210044, China
推荐引用方式 GB/T 7714	Yan Y.,Zhou Y.,Kong S.,et al. Effectiveness of emission control in reducing PM2.5 pollution in central China during winter haze episodes under various potential synoptic controls[J],2021,21(4).
APA	Yan Y..,Zhou Y..,Kong S..,Lin J..,Wu J..,...&Zhao T..(2021).Effectiveness of emission control in reducing PM2.5 pollution in central China during winter haze episodes under various potential synoptic controls.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(4).
MLA	Yan Y.,et al."Effectiveness of emission control in reducing PM2.5 pollution in central China during winter haze episodes under various potential synoptic controls".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.4(2021).