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

CCPortal

DOI	10.1016/j.envpol.2019.113616
	Light absorption, fluorescence properties and sources of brown carbon aerosols in the Southeast Tibetan Plateau
	Wu G.; Wan X.; Ram K.; Li P.; Liu B.; Yin Y.; Fu P.; Loewen M.; Gao S.; Kang S.; Kawamura K.; Wang Y.; Cong Z.
发表日期	2020
ISSN	0169555X
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 m2 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. Optical properties and organic tracers demonstrate that BrC is derived from bioaerosols in summer, while biomass burning emissions in winter. © 2019 Elsevier Ltd
语种	英语
scopus关键词	Environmental Pollution
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158467
作者单位	Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences (CAS), Beijing, 100101, China; Institute of Environment and Sustainable Development, Banaras Hindu University, Varanasi, 221005, India; Chongqing Jinfo Mountain Field Scientific Observation and Research Station for Kaster Ecosystem, School of Geographical Sciences, Southwest University, Chongqing, 400715, China; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, CAS, Beijing, 100085, China; Institute of Surface-Earth System Science, Tianjin University, Tianjin, 300072, China; State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, CAS, Lanzhou, 730000, China; Chubu Institute for Advanced Studies, Chubu University, Kasugai, 487-8501, Japan; Center for Excellence in Tibetan Plateau Earth Sciences, CAS, Beijing, 100101, China; University of Chinese Academy of Scie...
推荐引用方式 GB/T 7714	Wu G.,Wan X.,Ram K.,et al. Light absorption, fluorescence properties and sources of brown carbon aerosols in the Southeast Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2020,257.
APA	Wu G..,Wan X..,Ram K..,Li P..,Liu B..,...&Cong Z..(2020).Light absorption, fluorescence properties and sources of brown carbon aerosols in the Southeast Tibetan Plateau.,257.
MLA	Wu G.,et al."Light absorption, fluorescence properties and sources of brown carbon aerosols in the Southeast Tibetan Plateau".257(2020).