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

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室

	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 1,2,3,6; Li, Jun 1,2,3,6; Zhong, Guangcai 1,2,3,6; Zhu, Sanyuan 1,2,3,6; Cheng, Zhineng 1,2,3,6; Tang, Jiao 1,2,3,6; Jiang, Hongxing 4; Jiang, Bin 1,2,3,6; Liao, Yuhong 1,2,3,6; Song, Jianzhong 1,2,3,6
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
	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
ISSN号	2169-897X
DOI	10.1029/2023JD039512
通讯作者	Li, Jun(junli@gig.ac.cn)
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.
WOS关键词	HUMIC-LIKE SUBSTANCES ; MOLECULAR-SIZE DISTRIBUTION ; DISSOLVED ORGANIC-MATTER ; BIOMASS BURNING AEROSOL ; OPTICAL-PROPERTIES ; ABSORPTION PROPERTIES ; MASS-SPECTROMETRY ; ELEMENTAL CARBON ; URBAN AEROSOLS ; HULIS
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
WOS记录号	WOS:001144128800001
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
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/34347]
专题	烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
通讯作者	Li, Jun
作者单位	1.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Prov Key Lab Environm Protect, Guangzhou, Peoples R China 2.CAS Ctr Excellence Deep Earth Sci, Guangzhou, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou, Peoples R China 4.Fudan Univ, Shanghai Key Lab Particle Pollut & Prevent LAP3, Dept Environm Sci & Engn, Shanghai, Peoples R China 5.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai, Peoples R China 6.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Hong Kong Macao Joint Lab Environm Pollu, Hong Kong, Guangdong, 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.