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DOI	10.5194/acp-19-5791-2019
	Local and regional contributions to fine particulate matter in the 18 cities of Sichuan Basin; southwestern China
	Qiao X.; Guo H.; Tang Y.; Wang P.; Deng W.; Zhao X.; Hu J.; Ying Q.; Zhang H.
发表日期	2019
ISSN	16807316
起始页码	5791
结束页码	5803
卷号	19 期号:9
英文摘要	The Sichuan Basin (SCB) is one of the regions suffering from severe air pollution in China, but fewer studies have been conducted for this region than for the more developed regions in eastern and northern China. In this study, a source-oriented version of the Community Multiscale Air Quality (CMAQ) model was used to quantify contributions from nine regions to PM2.5 (i.e., particulate matter, PM, with an aerodynamic diameter less than 2.5 μm) and its components in the 18 cities within the SCB in the winter (December 2014 to February 2015) and summer (June to August 2015). In the winter, citywide average PM2.5 concentrations are 45-126 μg mĝ'3, with 21 %-51 % and 39 %-66 % being due to local and nonlocal emissions, respectively. In the summer, 15 %-45 % and 25 %-52 % of citywide average PM2.5 (14-31 μg mĝ'3) are due to local and nonlocal emissions, respectively. Compared to primary PM (PPM), the inter-region transport of secondary inorganic aerosols (SIA), including ammonia, nitrate, and sulfate ions ( ${NH}_{4}^{+}$ , ${NO}_{3}^{-}$ , and ${SO}_{4}^{2 -}$ , respectively), and their gas-phase precursors are greater. The region to the east of SCB (R7, including central and eastern China and others) is the largest contributor outside the SCB, and it can contribute approximately 80 % of PM2.5 in the eastern, northeastern, and southeastern rims of the SCB but only 10 % in other SCB regions in both seasons. Under favorable transport conditions, regional transport of air pollutants from R7 could account for up to 35-100 μg mĝ'3 of PM2.5 in each of the SCB cities in the winter. This study demonstrates that it is important to have joint emission control efforts among cities within the SCB and regions to the east in order to reduce PM2.5 concentrations and prevent high PM2.5 days for the entire basin. © Author(s) 2019.
语种	英语
scopus关键词	atmospheric modeling; concentration (composition); emission control; particulate matter; pollutant transport; seasonal variation; urban area; China; Sichuan Basin
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/144446
作者单位	Institute of New Energy and Low-carbon Technology, Sichuan University, No. 24, South Section One, First Ring Road, Chengdu, Sichuan, 610065, China; Healthy Food Evaluation Research Center, Sichuan University, No. 24, South Section One, First Ring Road, Chengdu, Sichuan, 610065, China; Department of Civil and Environmental Engineering, Louisiana State University, Baton Rouge, LA 70803, United States; College of Architecture and Environment, Healthy Food Evaluation Research Center, Sichuan University, Chengdu, 610065, China; Xinjiang Academy of Environmental Protection Science, Urumqi, 830011, China; Department of Epidemiology and Biostatistics, West China School of Public Health, Sichuan University, No. 17, Section 3, South Renmin Road, Chengdu, Sichuan, 610041, China; Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Engineering Technology Research Center of Environmental Cleaning Materials, Nanjing University of Information Science and Technology, Nanjing, 21004...
推荐引用方式 GB/T 7714	Qiao X.,Guo H.,Tang Y.,et al. Local and regional contributions to fine particulate matter in the 18 cities of Sichuan Basin; southwestern China[J],2019,19(9).
APA	Qiao X..,Guo H..,Tang Y..,Wang P..,Deng W..,...&Zhang H..(2019).Local and regional contributions to fine particulate matter in the 18 cities of Sichuan Basin; southwestern China.Atmospheric Chemistry and Physics,19(9).
MLA	Qiao X.,et al."Local and regional contributions to fine particulate matter in the 18 cities of Sichuan Basin; southwestern China".Atmospheric Chemistry and Physics 19.9(2019).