气候变化领域集成服务门户(CCPortal): Modeled changes in source contributions of particulate matter during the COVID-19 pandemic in the Yangtze River Delta, China

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DOI	10.5194/acp-21-7343-2021
	Modeled changes in source contributions of particulate matter during the COVID-19 pandemic in the Yangtze River Delta, China
	Ma J.; Shen J.; Wang P.; Zhu S.; Wang Y.; Wang P.; Wang G.; Chen J.; Zhang H.
发表日期	2021
ISSN	1680-7316
起始页码	7343
结束页码	7355
卷号	21 期号:9
英文摘要	Within a short time after the outbreak of coronavirus disease 2019 (COVID-19) in Wuhan, Hubei, the Chinese government introduced a nationwide lockdown to prevent the spread of the pandemic. The quarantine measures have significantly decreased the anthropogenic activities, thus improving air quality. To study the impacts caused by the lockdown on specific source sectors and regions in the Yangtze River Delta (YRD), the Community Multiscale Air Quality (CMAQ) model was used to investigate the changes in source contributions to fine particulate matter (PM 2.5) from 23 January to 28 February 2020, based on different emission control cases. Compared to case 1 (without emission reductions), the total PM 2.5 mass for case 2 (with emission reductions) decreased by more than 20 % over the entire YRD, and the reduction ratios of its components were 15 %, 16 %, 20 %, 43 %, 34 %, and 35 % in primary organic aerosol (POA), elemental carbon (EC), sulfate, nitrate, ammonium, and secondary organic aerosol (SOA), respectively. The source apportionment results showed that PM 2.5 concentrations from transportation decreased by 40 %, while PM 2.5 concentrations from the residential and power sectors decreased by less than 10 % due to the lockdown. Although all sources decreased, the relative contribution changed differently. Contributions from the residential sector increased by more than 10 % to 35 %, while those in the industrial sector decreased by 33 %. Considering regional transport, the total PM 2.5 mass of all regions decreased 20 %-30 % in the YRD, with the largest decreased value of 5.0 μg m-3 in Henan, Hebei, Beijing, and Tianjin (Ha-BTH). In Shanghai, the lower contributions from local emissions and regional transmission (mainly Shandong and Ha-BTH) led to the reduced PM 2.5. This study suggests adjustments of control measures for various sources and regions. © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	air quality; concentration (composition); COVID-19; disease control; emission control; emission inventory; epidemic; pandemic; particulate matter; source apportionment; China; Henan; Jingjinji; Shanghai; Yangtze Delta; Coronavirus
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/246895
作者单位	Fudan Tyndall Center, Department of Environmental Science and Engineering, Fudan University, Shanghai, 200438, China; School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hong Kong, 99907, Hong Kong; Department of Civil and Environmental Engineering, Louisiana State University, Baton Rouge, LA 70803, United States; Key Laboratory of Geographic Information Science, Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai, 200241, China; Institute of Eco-Chongming (IEC), East China Normal University, Shanghai, 200062, China
推荐引用方式 GB/T 7714	Ma J.,Shen J.,Wang P.,et al. Modeled changes in source contributions of particulate matter during the COVID-19 pandemic in the Yangtze River Delta, China[J],2021,21(9).
APA	Ma J..,Shen J..,Wang P..,Zhu S..,Wang Y..,...&Zhang H..(2021).Modeled changes in source contributions of particulate matter during the COVID-19 pandemic in the Yangtze River Delta, China.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(9).
MLA	Ma J.,et al."Modeled changes in source contributions of particulate matter during the COVID-19 pandemic in the Yangtze River Delta, China".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.9(2021).