气候变化领域集成服务门户(CCPortal): Light absorption, fluorescence properties and sources of brown carbon aerosols in the Southeast Tibetan Plateau

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DOI	10.1016/j.envpol.2019.113616
	Light absorption, fluorescence properties and sources of brown carbon aerosols in the Southeast Tibetan Plateau
	Wu, Guangming; Wan, Xin; Ram, Kirpa; Li, Peilin; Liu, Bin; Yin, Yongguang; Fu, Pingqing; Loewen, Mark; Gao, Shaopeng; Kang, Shichang; Kawamura, Kimitaka; Wang, Yongjie; Cong, Zhiyuan
通讯作者	Cong, ZY (通讯作者)
发表日期	2020
ISSN	0269-7491
EISSN	1873-6424
卷号	257
英文摘要	Brown carbon (BrC) has been proposed as an important driving factor in climate change due to its light absorption properties. However, our understanding of BrC's chemical and optical properties are inadequate, particularly at remote regions. This study conducts a comprehensive investigation of BrC aerosols in summer (Aug. 2013) and winter (Jan. 2014) at Southeast Tibetan Plateau, which is ecologically fragile and sensitive to global warming. The concentrations of methanol-soluble BrC (MeS-BrC) are approximately twice of water-soluble BrC (WS-BrC), demonstrating the environmental importance of water-insoluble BrC are previously underestimated with only WS-BrC considered. The mass absorption efficiency of WS-BrC (0.27-0.86 m(2) g(-1)) is lower than those in heavily polluted South Asia, indicating a distinct contrast between the two sides of Himalayas. Fluorescence reveals that the absorption of BrC is mainly attributed to humic-like and protein-like substances, which broaden the current knowledge of BrC's chromophores. Combining organic tracer, satellite MODIS data and air-mass backward trajectory analysis, this study finds BrC is mainly derived from bioaerosols and secondary formation in summer, while long-range transport of biomass burning emissions in winter. Our study provides new insights into the optical and chemical properties of BrC, which may have implications for environmental effect and sources of organic aerosols. (C) 2019 Elsevier Ltd. All rights reserved.
关键词	SOLUBLE ORGANIC-CARBON ATMOSPHERIC FINE PARTICLES HUMIC-LIKE SUBSTANCES HIGH-ALTITUDE SITE MOLECULAR CHARACTERIZATION CHEMICAL-COMPOSITION BLACK CARBON OPTICAL-PROPERTIES SIZE DISTRIBUTION RECENT PROGRESS
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000514746800114
来源期刊	ENVIRONMENTAL POLLUTION
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260052
推荐引用方式 GB/T 7714	Wu, Guangming,Wan, Xin,Ram, Kirpa,et al. Light absorption, fluorescence properties and sources of brown carbon aerosols in the Southeast Tibetan Plateau[J]. 中国科学院青藏高原研究所,2020,257.
APA	Wu, Guangming.,Wan, Xin.,Ram, Kirpa.,Li, Peilin.,Liu, Bin.,...&Cong, Zhiyuan.(2020).Light absorption, fluorescence properties and sources of brown carbon aerosols in the Southeast Tibetan Plateau.ENVIRONMENTAL POLLUTION,257.
MLA	Wu, Guangming,et al."Light absorption, fluorescence properties and sources of brown carbon aerosols in the Southeast Tibetan Plateau".ENVIRONMENTAL POLLUTION 257(2020).