| Measurement report: Long-emission-wavelength chromophores dominate the light absorption of brown carbon in aerosols over Bangkok: impact from biomass burning | |
Tang, Jiao1,2,3,4; Wang, Jiaqi1,2,3,4,5; Zhong, Guangcai1,2,3,4; Jiang, Hongxing1,2,3,4,5; Mo, Yangzhi1,2,3,4; Zhang, Bolong1,2,3,4,5; Geng, Xiaofei1,2,3,4,5; Chen, Yingjun6; Tang, Jianhui7 ; Tian, Congguo7; Bualert, Surat8; Li, Jun1,2,3,4; Zhang, Gan1,2,3,4
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| Source Publication | ATMOSPHERIC CHEMISTRY AND PHYSICS
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| ISSN | 1680-7316 |
| 2021-07-28 | |
| Volume | 21Issue:14Pages:11337-11352 |
| DOI | 10.5194/acp-21-11337-2021 |
| Corresponding Author | Zhong, Guangcai(gczhong@gig.ac.cn) |
| Abstract | 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 (lambda(max) > 500 nm). Positive matrix factorization analysis further suggested that up to 50% of these responsible chromophores originated from biomass burning emissions. |
| Funding Organization | National Natural Science Foundation of China ; International Partnership Program of Chinese Academy of Sciences ; Guangdong Foundation for Program of Science and Technology Research ; China Postdoctoral Science Foundation |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | DISSOLVED ORGANIC-MATTER ; HUMIC-LIKE SUBSTANCES ; OPTICAL-PROPERTIES ; FLUORESCENCE SPECTROSCOPY ; MOLECULAR CHARACTERIZATION ; MATRIX SPECTROSCOPY ; FINE PARTICLES ; AIR-QUALITY ; WATER ; EXCITATION |
| WOS Research Area | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| WOS ID | WOS:000678715700003 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.yic.ac.cn/handle/133337/29622 |
| Collection | 中科院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室 中科院海岸带环境过程与生态修复重点实验室 |
| Corresponding Author | Zhong, Guangcai |
| Affiliation | 1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Key Lab Environm Protect & Resources Ut, Guangzhou 510640, Peoples R China 3.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Hong Kong Macao Joint Lab Environm Poll, Guangzhou 510640, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Fudan Univ, Dept Environm Sci & Engn, Shanghai 200092, Peoples R China 7.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China 8.Kasetsart Univ, Fac Environm, Bangkok 10900, Thailand |
| Recommended Citation GB/T 7714 | Tang, Jiao,Wang, Jiaqi,Zhong, Guangcai,et al. Measurement report: Long-emission-wavelength chromophores dominate the light absorption of brown carbon in aerosols over Bangkok: impact from biomass burning[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2021,21(14):11337-11352. |
| APA | Tang, Jiao.,Wang, Jiaqi.,Zhong, Guangcai.,Jiang, Hongxing.,Mo, Yangzhi.,...&Zhang, Gan.(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),11337-11352. |
| MLA | Tang, Jiao,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):11337-11352. |
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| Measurement report L（2762KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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