The Sources and Atmospheric Processes of Strong Light-Absorbing Components in Water Soluble Brown Carbon: Insights From a Multi-Proxy Study of PM<sub>2.5</sub> in 10 Chinese Cities

doi:10.1029/2023JD039512

	The Sources and Atmospheric Processes of Strong Light-Absorbing Components in Water Soluble Brown Carbon: Insights From a Multi-Proxy Study of PM_2.5 in 10 Chinese Cities
	Mo, Yangzhi 1,2,3,4; Li, Jun 1,2,3,4; Zhong, Guangcai 1,2,3,4; Zhu, Sanyuan 1,2,3,4; Cheng, Zhineng 1,2,3,4; Tang, Jiao 1,2,3,4; Jiang, Hongxing 5; Jiang, Bin 1,2,3,4; Liao, Yuhong 1,2,3,4; Song, Jianzhong 1,2,3,4; Tian, Chongguo6 ; Chen, Yingjun 5; Zhao, Shizhen 1,2,3,4; Zhang, Gan 1,2,3,4
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN	2169-897X
	2024-01-28
卷号	129 期号:2 页码:17
关键词	atmospheric humic-like substances water-soluble brown carbon dual carbon isotopes recalcitrant coal combustion aromatic components
DOI	10.1029/2023JD039512
通讯作者	Li, Jun([email protected])
英文摘要	Humic-like substances (HULIS) are significant contributor to the light absorption of water-soluble brown carbon (WSBrC), which contains certain strong light-absorbing chemical components that are not well understood, impeding the assessment of WSBrC's climate impact. China as the hotspot regions with high loading of WSBrC characterized by high light-absorbing capacity, here, we investigated the sources and atmospheric processes (delta C-13-Delta C-14), molecular composition (Fourier transform ion cyclotron resonance mass spectrometry), and light absorption properties (UV spectrophotometry) of HULIS in PM2.5 from 10 Chinese cities. HULIS-C was major contributor to the light absorption coefficient (70.5 +/- 6.6%) of WSBrC at 365 nm, which was more enriched with fossil sources (48.0 +/- 9.0% vs. 30.3 +/- 13.9%) but depleted in C-13 (delta C-13: -25.6 +/- 0.9 parts per thousand vs. -22.4 +/- 1.0 parts per thousand) relative to non-HULIS-C. This suggests that the fossil components in HULIS are more recalcitrant to oxidative aging and exhibit higher light-absorbing capacity, while the non-fossil organic carbon is more likely to be oxidatively bleached into small, colorless, and highly polar molecules (i.e., non-HULIS). Aromatic components are the major strong light-absorbing fossil components in HULIS, dominantly originating from coal combustion (>77%). Non-negative matrix factorization model showed that aromatic molecules from coal combustion have higher molecular weight and lower oxidation levels than biomass burning, potentially making them to be photo-recalcitrant compounds. Our finding that coal combustion-derived BrC maybe more persistent in the atmosphere and has greater long-term impact on climate than BrC derived from biomass burning is an important consideration in climate models and mitigation policies.
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of China ; Alliance of International Science Organizations ; Guangdong Basic and Applied Basic Research Foundation ; China Scholarship Council
收录类别	SCI
语种	英语
关键词[WOS]	HUMIC-LIKE SUBSTANCES ; MOLECULAR-SIZE DISTRIBUTION ; DISSOLVED ORGANIC-MATTER ; BIOMASS BURNING AEROSOL ; OPTICAL-PROPERTIES ; ABSORPTION PROPERTIES ; MASS-SPECTROMETRY ; ELEMENTAL CARBON ; URBAN AEROSOLS ; HULIS
研究领域[WOS]	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001144128800001
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/34348
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学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
通讯作者	Li, Jun
作者单位	1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Prov Key Lab Environm Protect, Guangzhou, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Hong Kong Macao Joint Lab Environm Pollu, Hong Kong, Guangdong, Peoples R China 4.CAS Ctr Excellence Deep Earth Sci, Guangzhou, Peoples R China 5.Fudan Univ, Shanghai Key Lab Particle Pollut & Prevent LAP3, Dept Environm Sci & Engn, Shanghai, Peoples R China 6.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai, Peoples R China
推荐引用方式 GB/T 7714	Mo, Yangzhi,Li, Jun,Zhong, Guangcai,et al. The Sources and Atmospheric Processes of Strong Light-Absorbing Components in Water Soluble Brown Carbon: Insights From a Multi-Proxy Study of PM_2.5 in 10 Chinese Cities[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2024,129(2):17.
APA	Mo, Yangzhi.,Li, Jun.,Zhong, Guangcai.,Zhu, Sanyuan.,Cheng, Zhineng.,...&Zhang, Gan.(2024).The Sources and Atmospheric Processes of Strong Light-Absorbing Components in Water Soluble Brown Carbon: Insights From a Multi-Proxy Study of PM_2.5 in 10 Chinese Cities.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,129(2),17.
MLA	Mo, Yangzhi,et al."The Sources and Atmospheric Processes of Strong Light-Absorbing Components in Water Soluble Brown Carbon: Insights From a Multi-Proxy Study of PM_2.5 in 10 Chinese Cities".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 129.2(2024):17.