气候变化领域集成服务门户(CCPortal): Vital contribution of residential emissions to atmospheric fine particles (PM2.5) during the severe wintertime pollution episodes in Western China

CCPortal

DOI	10.1016/j.envpol.2018.11.027
	Vital contribution of residential emissions to atmospheric fine particles (PM2.5) during the severe wintertime pollution episodes in Western China
	Yang, Junhua; Kang, Shichang; Ji, Zhenming; Yang, Sixiao; Li, Chaoliu; Tripathee, Lekhendra
发表日期	2019
ISSN	0269-7491
EISSN	1873-6424
卷号	245
英文摘要	To mitigate severe wintertime pollution events in Western China, identifying the source of atmospheric fine particles with an aerodynamic diameter of <= 2.5 mu m (PM2.5) is a crucial step. In this study, we first analyzed the meteorological and emission factors that caused a considerable increase in the PM2.5 concentration in December 2016. This severe pollution episode was found to be related with unfavorable meteorological conditions and increased residential emissions. The WRF-Chem simulations were used to calculate the residential contribution to PM2.5 through a hybrid source apportionment method. From the validation that used grid data and in situ observations in terms of meteorological elements, PM2.5 and its compounds, the simulated results indicated that the residential sector was the largest single contributor to the PM2.5 concentration (60.2%), because of its predominant contributions to black carbon (BC, 62.1%) and primary organic aerosol (POA, 86.5%), with these two primary components accounting for 70.7% of the PM2.5 mass. Compared with the remote background (RB) region covering the central part of the Tibetan Plateau, the residential sector contributed 11.3% more to PM2.5 in the highly populated mega-city (HM) region, including the Sichuan and Guanzhong Basins, due to greater contribution to the concentrations of primary PM2.5 components. As the main emission source of sulfur dioxide (SO2), nitrogen oxides (NOx), and secondary organic aerosol (SOA), the industrial sector was the second largest contributor to the PM2.5 concentration in the HM region. However, in the RB region, the dominating emissions of NOx, SOA and BC were from the transport sector; thus, it was the next largest contributor to total PM2.5. An evaluation of the emission control experiment suggested that mitigation strategies that reduce emissions from residential sources can effectively reduce the PM2.5 concentration during heavy pollution periods. (C) 2018 Elsevier Ltd. All rights reserved.
关键词	Severe pollution Residential emissions Unfavorable weather PM2.5 Control strategies
学科领域	Environmental Sciences & Ecology
语种	英语
WOS研究方向	Environmental Sciences
来源期刊	ENVIRONMENTAL POLLUTION
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/112042
作者单位	Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 73000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Yang, Junhua,Kang, Shichang,Ji, Zhenming,et al. Vital contribution of residential emissions to atmospheric fine particles (PM2.5) during the severe wintertime pollution episodes in Western China[J]. 中国科学院西北生态环境资源研究院,2019,245.
APA	Yang, Junhua,Kang, Shichang,Ji, Zhenming,Yang, Sixiao,Li, Chaoliu,&Tripathee, Lekhendra.(2019).Vital contribution of residential emissions to atmospheric fine particles (PM2.5) during the severe wintertime pollution episodes in Western China.ENVIRONMENTAL POLLUTION,245.
MLA	Yang, Junhua,et al."Vital contribution of residential emissions to atmospheric fine particles (PM2.5) during the severe wintertime pollution episodes in Western China".ENVIRONMENTAL POLLUTION 245(2019).