气候变化领域集成服务门户(CCPortal): A black carbon peak and its sources in the free troposphere of Beijing induced by cyclone lifting and transport from central China

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DOI	10.5194/acp-21-15555-2021
	A black carbon peak and its sources in the free troposphere of Beijing induced by cyclone lifting and transport from central China
	Wang Z.; Zhu B.; Kang H.; Lu W.; Yan S.; Zhao D.; Zhang W.; Gao J.
发表日期	2021
ISSN	1680-7316
起始页码	15555
结束页码	15567
卷号	21 期号:20
英文摘要	Observations suggest that the vertical distributions of air pollutants, such as black carbon (BC), present as various types depending on the emission sources and meteorological diffusion conditions. However, the formation process and source appointment of some special BC profiles are not fully understood. In this paper, by using the Weather Research and Forecasting model coupled with Chemistry (WRF-Chem) with a BC-tagging technique, we investigate the formation mechanism and regional sources of a BC peak in the free troposphere observed by an aircraft flight in Beijing (BJ) on 5 May 2018. The results show that the contribution rate of the Beijing-Tianjin-Hebei (BTH) region to the surface BC of BJ exceeded 80 % in this case. Local sources dominated BC in BJ from the surface to approximately 700 m (78.5 %), while the BC peak in the free troposphere (∼4000 m) was almost entirely imported from external sources (99.8 %). Combining BC tracking and process analysis, we find that horizontal advection (HADV) and vertical advection (VADV) processes played an important role in the convergent and upward movement and the transport of BC. The BC originating from the surface in central provinces, including Shanxi (SX), Henan (HN), and Hebei (HB), had been uplifted through a cyclone system 16 h previously, was transported to a height of approximately 3000 m above BJ, and was then lifted by the VADV process to approximately 4000 m. At the surface, BJ and its surroundings were under the control of a weak pressure gradient, leading to the accumulation of BC within the boundary layer. Our results indicate that cyclone systems can quickly lift air pollutants, such as BC, up to the free troposphere, as well as extend their lifetimes and further affect the regional atmospheric environment and climate. © 2021 Zhenbin Wang et al.
语种	英语
scopus关键词	atmospheric chemistry; atmospheric pollution; black carbon; cyclone; formation mechanism; pollutant source; troposphere; vertical distribution; weather forecasting; Beijing [China]; China; Hebei; Tianjin
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/246494
作者单位	Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Key Laboratory of Meteorological Disaster (KLME), Ministry of Education, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Joint International Research Laboratory of Climate and Environment Change (ILCEC), Nanjing University of Information Science and Technology, Nanjing, 210044, China; Beijing Weather Modification Office, Beijing, 100089, China; College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao, 266100, China; Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, 610225, China
推荐引用方式 GB/T 7714	Wang Z.,Zhu B.,Kang H.,et al. A black carbon peak and its sources in the free troposphere of Beijing induced by cyclone lifting and transport from central China[J],2021,21(20).
APA	Wang Z..,Zhu B..,Kang H..,Lu W..,Yan S..,...&Gao J..(2021).A black carbon peak and its sources in the free troposphere of Beijing induced by cyclone lifting and transport from central China.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(20).
MLA	Wang Z.,et al."A black carbon peak and its sources in the free troposphere of Beijing induced by cyclone lifting and transport from central China".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.20(2021).