Light absorption, fluorescence properties and sources of brown carbon aerosols in the Southeast Tibetan Plateau
文献类型：期刊论文
| 作者 | Wu, Guangming; Wan, Xin; Ram, Kirpa; Li, Peilin; Liu, Bin; Yin, Yongguang; Fu, Pingqing; Loewen, Mark; Gao, Shaopeng; Kang, Shichang |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2020-02 |
| 卷号 | 257页码:1-11 |
| ISSN号 | 0269-7491 |
| 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. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/44722]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 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]. ENVIRONMENTAL POLLUTION,2020,257:1-11. |
| 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,257,1-11. |
| MLA | Wu, Guangming,et al."Light absorption, fluorescence properties and sources of brown carbon aerosols in the Southeast Tibetan Plateau".ENVIRONMENTAL POLLUTION 257(2020):1-11. |
入库方式： OAI收割
来源：生态环境研究中心
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