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DOI	10.5194/acp-21-2229-2021
	Insights into particulate matter pollution in the North China Plain during wintertime: local contribution or regional transport?
	Wu J.; Bei N.; Wang Y.; Li X.; Liu S.; Liu L.; Wang R.; Yu J.; Le T.; Zuo M.; Shen Z.; Cao J.; Tie X.; Li G.
发表日期	2021
ISSN	1680-7316
起始页码	2229
结束页码	2249
卷号	21 期号:3
英文摘要	Accurate identification and quantitative source apportionment of fine particulate matter (PM2:5) provide an important prerequisite for design and implementation of emission control strategies to reduce PM pollution. Therefore, a source-oriented version of the WRF-Chem model is developed in the study to conduct source apportionment of PM2:5in the North China Plain (NCP). A persistent and heavy haze event that occurred in the NCP from 5 December 2015 to 4 January 2016 is simulated using the model as a case study to quantify PM2:5contributions of local emissions and regional transport. Results show that local and nonlocal emissions contribute 36.3% and 63.7% of the PM2:5mass in Beijing during the haze event on average. When Beijing’s air quality is excellent or good in terms of hourly PM2:5concentrations, local emissions dominate the PM2:5mass, with contributions exceeding 50 %. However, when the air quality is severely polluted, the PM2:5contribution of nonlocal emissions is around 75 %. Nonlocal emissions also dominate Tianjin’s air quality, with average PM2:5contributions exceeding 65 %. The PM2:5level in Hebei and Shandong is generally controlled by local emissions, but in Henan, local and nonlocal emissions play an almost equivalent role in the PM2:5level, except when the air quality is severely polluted, with nonlocal PM2:5contributions of over 60 %. Additionally, the primary aerosol species are generally dominated by local emissions, with the average contribution exceeding 50 %. However, the source apportionment of secondary aerosols shows more evident regional characteristics. There fore except for cooperation with neighboring provinces to carry out strict emission mitigation measures, reducing primary aerosols is a priority to alleviate PM pollution in the NCP, especially in Beijing and Tianjin. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
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/168760
作者单位	Key Lab of Aerosol Chemistry and Physics, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, 710061, China; School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, 710049, China; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, United States
推荐引用方式 GB/T 7714	Wu J.,Bei N.,Wang Y.,et al. Insights into particulate matter pollution in the North China Plain during wintertime: local contribution or regional transport?[J],2021,21(3).
APA	Wu J..,Bei N..,Wang Y..,Li X..,Liu S..,...&Li G..(2021).Insights into particulate matter pollution in the North China Plain during wintertime: local contribution or regional transport?.Atmospheric Chemistry and Physics,21(3).
MLA	Wu J.,et al."Insights into particulate matter pollution in the North China Plain during wintertime: local contribution or regional transport?".Atmospheric Chemistry and Physics 21.3(2021).