Brown Carbon Aerosol in Urban Xi'an, Northwest China: The Composition and Light Absorption Properties

doi:10.1021/acs.est.8b02386

	Brown Carbon Aerosol in Urban Xi'an, Northwest China: The Composition and Light Absorption Properties
	Huang, Ru-Jin 1; Yang, Lu 1; Cao, Junji 1; Chen, Yang2 ; Chen, Qi 3; Li, Yongjie 4; Duan, Jing 1; Zhu, Chongshu 1; Dai, Wenting 1; Wang, Kai 1,5
刊名	Environmental Science and Technology
	2018
卷号	52 期号:12 页码:6825-6833
ISSN号	0013936X
DOI	10.1021/acs.est.8b02386
英文摘要	Light-absorbing organic carbon (i.e., brown carbon or BrC) in the atmospheric aerosol has significant contribution to light absorption and radiative forcing. However, the link between BrC optical properties and chemical composition remains poorly constrained. In this study, we combine spectrophotometric measurements and chemical analyses of BrC samples collected from July 2008 to June 2009 in urban Xi'an, Northwest China. Elevated BrC was observed in winter (5 times higher than in summer), largely due to increased emissions from wintertime domestic biomass burning. The light absorption coefficient of methanol-soluble BrC at 365 nm (on average approximately twice that of water-soluble BrC) was found to correlate strongly with both parent polycyclic aromatic hydrocarbons (parent-PAHs, 27 species) and their carbonyl oxygenated derivatives (carbonyl-OPAHs, 15 species) in all seasons (r2> 0.61). These measured parent-PAHs and carbonyl-OPAHs account for on average ∼1.7% of the overall absorption of methanol-soluble BrC, about 5 times higher than their mass fraction in total organic carbon (OC, ∼0.35%). The fractional solar absorption by BrC relative to element carbon (EC) in the ultraviolet range (300-400 nm) is significant during winter (42 ± 18% for water-soluble BrC and 76 ± 29% for methanol-soluble BrC), which may greatly affect the radiative balance and tropospheric photochemistry and therefore the climate and air quality. © 2018 American Chemical Society.
电子版国际标准刊号	15205851
语种	英语
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/8049]
专题	中国科学院重庆绿色智能技术研究院
作者单位	1.Key Laboratory of Aerosol Chemistry and Physics, State Key Laboratory of Loess and Quaternary Geology, Institute of Earth and Environment, Chinese Academy of Sciences, Xi'an; 710061, China; 2.Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing; 400714, China; 3.State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing; 100871, China; 4.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Taipa, China; 5.Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, Mainz; 55128, Germany; 6.School of Physics and Centre for Climate and Air Pollution Studies, Ryan Institute, National University of Ireland Galway, University Road, Galway; H91CF50, Ireland; 7.RCE-TEA, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing; 100029, China; 8.Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), Villigen; 5232, Switzerland; 9.Centre for Isotope Research (CIO), Energy and Sustainability Research Institute Groningen (ESRIG), University of Groningen, Groningen AG; 9747, Netherlands
推荐引用方式 GB/T 7714	Huang, Ru-Jin,Yang, Lu,Cao, Junji,et al. Brown Carbon Aerosol in Urban Xi'an, Northwest China: The Composition and Light Absorption Properties[J]. Environmental Science and Technology,2018,52(12):6825-6833.
APA	Huang, Ru-Jin.,Yang, Lu.,Cao, Junji.,Chen, Yang.,Chen, Qi.,...&Dusek, Uli.(2018).Brown Carbon Aerosol in Urban Xi'an, Northwest China: The Composition and Light Absorption Properties.Environmental Science and Technology,52(12),6825-6833.
MLA	Huang, Ru-Jin,et al."Brown Carbon Aerosol in Urban Xi'an, Northwest China: The Composition and Light Absorption Properties".Environmental Science and Technology 52.12(2018):6825-6833.