气候变化领域集成服务门户(CCPortal): Temporal Characteristics and Potential Sources of Black Carbon in Megacity Shanghai, China

CCPortal

DOI	10.1029/2019JD031827
	Temporal Characteristics and Potential Sources of Black Carbon in Megacity Shanghai, China
	Wei C.; Wang M.H.; Fu Q.Y.; Dai C.; Huang R.; Bao Q.
发表日期	2020
ISSN	2169897X
卷号	125 期号:9
英文摘要	Black carbon (BC) is a major light absorption material that acts as a climate change driver with high radiative forcing and as an air pollutant that reduces visibility and air quality. Thus, reducing the emission and ambient concentration of BC could help address climate change and improve air quality simultaneously. In this study, the mass concentration of atmospheric BC was continuously measured by an aethalometer in Shanghai in 2017. The annual BC concentration was 2.19 ± 1.28 μg/m3, with the highest loading in winter and the lowest loading in autumn. The BC concentrations varied with year and location when compared with previous studies in different locations in Shanghai. The hourly BC concentration had a bimodal distribution, with two peaks during the morning and evening traffic rush hours. Liquid fuels, biomass, and coal combustion contributed 65.7%, 21.5%, and 12.8%, respectively, of the total BC based on the advanced aethalometer model. The three sources varied in different seasons with a high contribution of liquid source in summer and more coal and biomass emissions in winter. High BC concentrations accumulated in the stable weather conditions in the four seasons and appeared when there were high wind speeds from the northwestern direction in winter. The Yangtze River Delta region was the most likely potential source region of high BC loading in the four seasons, and long-range transport from North China in winter was another likely source region based on the results of cluster analysis and potential source contribution function analysis of backward trajectories. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	back trajectory; black carbon; meteorological condition; source apportionment; temporal variation
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186030
作者单位	Shanghai Carbon Data Research Center, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China; Shanghai Environmental Monitoring Center, Shanghai, China
推荐引用方式 GB/T 7714	Wei C.,Wang M.H.,Fu Q.Y.,et al. Temporal Characteristics and Potential Sources of Black Carbon in Megacity Shanghai, China[J],2020,125(9).
APA	Wei C.,Wang M.H.,Fu Q.Y.,Dai C.,Huang R.,&Bao Q..(2020).Temporal Characteristics and Potential Sources of Black Carbon in Megacity Shanghai, China.Journal of Geophysical Research: Atmospheres,125(9).
MLA	Wei C.,et al."Temporal Characteristics and Potential Sources of Black Carbon in Megacity Shanghai, China".Journal of Geophysical Research: Atmospheres 125.9(2020).