气候变化领域集成服务门户(CCPortal): Intra-regional transport of black carbon between the south edge of the North China Plain and central China during winter haze episodes

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DOI	10.5194/acp-19-4499-2019
	Intra-regional transport of black carbon between the south edge of the North China Plain and central China during winter haze episodes
	Zheng H.; Kong S.; Wu F.; Cheng Y.; Niu Z.; Zheng S.; Yang G.; Yao L.; Yan Q.; Wu J.; Zheng M.; Chen N.; Xu K.; Yan Y.; Liu D.; Zhao D.; Zhao T.; Bai Y.; Li S.; Qi S.
发表日期	2019
ISSN	16807316
起始页码	4499
结束页码	4516
卷号	19 期号:7
英文摘要	Black carbon (BC), which is formed from the incomplete combustion of fuel sources (mainly fossil fuel, biofuel and open biomass burning), is a chemically inert optical absorber in the atmosphere. It has significant impacts on global climate, regional air quality and human health. During transportation, its physical and chemical characteristics as well as its sources change dramatically. To investigate the properties of BC (i.e., mass concentration, sources and optical properties) during intra-regional transport between the southern edge of the North China Plain (SE-NCP) and central China (CC), simultaneous BC observations were conducted in a megacity (Wuhan-WH) in CC, in three borderline cities (Xiangyang-XY, Suixian-SX and Hong'an-HA; from west to east) between the SE-NCP and CC, and in a city (Luohe-LH) in the SE-NCP during typical winter haze episodes. Using an Aethalometer, the highest equivalent BC (eBC) mass concentrations and the highest aerosol absorption coefficients (σabs) were found in LH in the SE-NCP, followed by the borderline cities (XY, SX and HA) and WH. The levels, sources, optical properties (i.e., σabs and absorption Angström exponent, AAE) and geographic origins of eBC were different between clean and polluted periods. Compared with clean days, higher eBC levels (26.4 %-163% higher) and σabs (18.2 %-236% higher) were found during pollution episodes due to the increased combustion of fossil fuels (increased by 51.1 %-277 %), which was supported by the decreased AAE values (decreased by 7.40 %-12.7 %). The conditional bivariate probability function (CBPF) and concentration-weighted trajectory (CWT) results showed that the geographic origins of biomass burning (BCbb) and fossil fuel (BCff) combustionderived BC were different. Air parcels from the south dominated for border sites during clean days, with contributions of 46.0 %-58.2 %, whereas trajectories from the northeast showed higher contributions (37.5 %-51.2 %) during pollution episodes. At the SE-NCP site (LH), transboundary influences from the south (CC) exhibited a more frequent impact (with air parcels from this direction comprising 47.8% of all parcels) on the ambient eBC levels during pollution episodes. At WH, eBC was mainly from the northeast transport route throughout the observation period. Two transportation cases showed that the mass concentrations of eBC, BCff and σabsall increased, from upwind to downwind, whereas AAE decreased. This study highlights that intra-regional prevention and control for dominant sources at each specific site should be considered in order to improve the regional air quality. © 2019 Author(s). This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	aerosol; atmospheric transport; black carbon; concentration (composition); haze; particulate matter; pollutant transport; seasonal variation; source apportionment; China; North China Plain
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/144511
作者单位	Department of Atmospheric Science, School of Environmental Sciences, China University of Geosciences, Wuhan, 430074, China; Department of Environmental Science and Technology, School of Environmental Sciences, China University of Geosciences, Wuhan, 430074, China; Hubei Provincial Environmental Monitoring Centre, Wuhan, 430072, China; Department of Atmospheric Sciences, School of Earth Sciences, Zhejiang University, Hangzhou, 310058, China; Beijing Weather Modification Office, Beijing, 100089, China; School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Hubei Key Laboratory for Heavy Rain Monitoring and Warning Research, Institute of Heavy Rain, China Meteorological Administration, Wuhan, 430205, China
推荐引用方式 GB/T 7714	Zheng H.,Kong S.,Wu F.,et al. Intra-regional transport of black carbon between the south edge of the North China Plain and central China during winter haze episodes[J],2019,19(7).
APA	Zheng H..,Kong S..,Wu F..,Cheng Y..,Niu Z..,...&Qi S..(2019).Intra-regional transport of black carbon between the south edge of the North China Plain and central China during winter haze episodes.Atmospheric Chemistry and Physics,19(7).
MLA	Zheng H.,et al."Intra-regional transport of black carbon between the south edge of the North China Plain and central China during winter haze episodes".Atmospheric Chemistry and Physics 19.7(2019).