气候变化领域集成服务门户(CCPortal): Measurement report: Long-emission-wavelength chromophores dominate the light absorption of brown carbon in aerosols over Bangkok: Impact from biomass burning

CCPortal

DOI	10.5194/acp-21-11337-2021
	Measurement report: Long-emission-wavelength chromophores dominate the light absorption of brown carbon in aerosols over Bangkok: Impact from biomass burning
	Tang J.; Wang J.; Zhong G.; Jiang H.; Mo Y.; Zhang B.; Geng X.; Chen Y.; Tang J.; Tian C.; Bualert S.; Li J.; Zhang G.
发表日期	2021
ISSN	1680-7316
起始页码	11337
结束页码	11352
卷号	21 期号:14
英文摘要	Chromophores represent an important portion of light-absorbing species, i.e., brown carbon. Yet knowledge of what and how chromophores contribute to aerosol light absorption is still sparse. To address this problem, we examined soluble independent chromophores in a set of year-round aerosol samples from Bangkok. The water-soluble fluorescent chromophores identified via excitation-emission matrix (EEM) spectroscopy and follow-up parallel factor analysis could be mainly assigned as humic-like substances and protein-like substances, which differed in their EEM pattern from that of the methanol-soluble fraction. The emission wavelength of fluorescent chromophores in environmental samples tended to increase compared with that of the primary combustion emission, which could be attributed to secondary formation or the aging process. Fluorescent indices inferred that these light-absorbing chromophores were not significantly humified and comprised a mixture of organic matter of terrestrial and microbial origin, which exhibited a different characteristic from primary biomass burning and coal-combustion results. A multiple linear regression analysis revealed that larger fluorescent chromophores that were oxygen-rich and highly aromatic with high molecular weights were the key contributors of light absorption, preferably at longer emission wavelengths (λmax>500 nm). Positive matrix factorization analysis further suggested that up to 50% of these responsible chromophores originated from biomass burning emissions. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	absorption; aerosol composition; aerosol formation; biomass burning; brown carbon; carbon emission; Bangkok; Central Region [Thailand]; Krung Thep Mahanakhon; Thailand
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246701
作者单位	State Key Lab. of Organ. Geochem. and Guangdong Key Lab. of Environ. Protect. and Rsrc. Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; CAS Center for Excellence in Deep Earth Science, Guangzhou, 510640, China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Department of Environmental Science and Engineering, Fudan University, Shanghai, 200092, China; Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, China; Faculty of Environment, Kasetsart University, Bangkok, 10900, Thailand
推荐引用方式 GB/T 7714	Tang J.,Wang J.,Zhong G.,et al. Measurement report: Long-emission-wavelength chromophores dominate the light absorption of brown carbon in aerosols over Bangkok: Impact from biomass burning[J],2021,21(14).
APA	Tang J..,Wang J..,Zhong G..,Jiang H..,Mo Y..,...&Zhang G..(2021).Measurement report: Long-emission-wavelength chromophores dominate the light absorption of brown carbon in aerosols over Bangkok: Impact from biomass burning.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(14).
MLA	Tang J.,et al."Measurement report: Long-emission-wavelength chromophores dominate the light absorption of brown carbon in aerosols over Bangkok: Impact from biomass burning".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.14(2021).