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Continuous Measurement and Molecular Compositions of Atmospheric Water-Soluble Brown Carbon in the Nearshore Marine Boundary Layer of Northern China: Secondary Formation and Influencing Factors

文献类型：期刊论文

作者Li, Hao5; Qin, Xiaofei5; Chen, Jia5; Wang, Guochen5; Liu, Chengfeng5; Lu, Da5; Zheng, Haitao4; Song, Xiaoquan3; Gao, Qianqian5; Xu, Jian5
刊名JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
出版日期2023-06-27
卷号128
ISSN号2169-897X
DOI10.1029/2023JD038565
通讯作者Huang, Kan(huangkan@fudan.edu.cn)
英文摘要Understanding the evolution of brown carbon (BrC) in the atmosphere is essential for investigating its climate effects. This study deployed a novel in-situ BrC continuous observation system to firstly measure water-soluble BrC absorption (Abs(WS-BrC)) in an offshore island over the Bohai Sea in the winter of 2020. The Abs(WS-BrC) abundance before the cold wave (BCW) was more than twice higher than that after the cold wave (ACW). This was mainly ascribed to the substantially suppressed formation of secondary WS-BrC (WS-BrCsec). Diurnal patterns of Abs(WS-BrC) exhibited nighttime peaks, which derived from enhanced primary emissions and strong aqueous-phase processes. Photochemical processes bleached daytime WS-BrC during BCW, while daytime peaks of WS-BrCsec emerged during ACW due to the weakened photobleaching effect. Statistical analysis indicated ambient temperature and relative humidity as well as total oxidized nitrogen (NO2 + NO3-) and reduced nitrogen (NH4+ + NH3) were the dominant factors promoting WS-BrCsec. Moderate aerosol pH (>2.5) also facilitated the formation of WS-BrCsec while no obvious dependences of WS-BrCsec on gas-particle partitioning of ammonia, O-3, and sulfur precursors were found. At the molecular level, BrC chromophores with the identified compositions, carbon oxidation state, O/C, H/C, and absorption spectra were compared between the two periods. Characteristics of water-soluble CHO- and CHON-BrC were more of secondary origin during BCW, while primary emissions contributed significantly to BrC chromophores during ACW. This study highlights the advantage of high resolution BrC measurement in probing its dynamic evolution and influencing factors.
WOS关键词ORGANIC AEROSOL FORMATION ; THERMODYNAMIC-EQUILIBRIUM MODEL ; LIGHT-ABSORPTION PROPERTIES ; BIOMASS-BURNING AEROSOL ; OPTICAL-PROPERTIES ; BLACK CARBON ; REACTIVE UPTAKE ; LIQUID WATER ; ABSORBING PROPERTIES ; AROMATIC-COMPOUNDS
资助项目National Key Ramp;D Plan programs[2018YFC0213105] ; National Natural Science Foundation of China[42175119]
WOS研究方向Meteorology & Atmospheric Sciences
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:001022731400001
资助机构National Key Ramp;D Plan programs ; National Natural Science Foundation of China
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/132461]  
专题中国科学院合肥物质科学研究院
通讯作者Huang, Kan
作者单位1.Fudan Univ, IRDR ICoE Risk Interconnect & Governance Weather C, Shanghai, Peoples R China
2.Inst Ecochongming, Shanghai, Peoples R China
3.Ocean Univ China, Coll Marine Technol, Fac Informat Sci & Engn, Qingdao, Peoples R China
4.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Hefei Inst Phys Sci, Key Lab Environm Opt & Technol, Hefei, Peoples R China
5.Fudan Univ, Dept Environm Sci & Engn, Shanghai Key Lab Atmospher Particle Pollut & Preve, Natl Observat & Res Stn Wetland Ecosyst Yangtze Es, Shanghai, Peoples R China
推荐引用方式
GB/T 7714		 Li, Hao,Qin, Xiaofei,Chen, Jia,et al. Continuous Measurement and Molecular Compositions of Atmospheric Water-Soluble Brown Carbon in the Nearshore Marine Boundary Layer of Northern China: Secondary Formation and Influencing Factors[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2023,128.
APA Li, Hao.,Qin, Xiaofei.,Chen, Jia.,Wang, Guochen.,Liu, Chengfeng.,...&Huang, Kan.(2023).Continuous Measurement and Molecular Compositions of Atmospheric Water-Soluble Brown Carbon in the Nearshore Marine Boundary Layer of Northern China: Secondary Formation and Influencing Factors.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,128.
MLA Li, Hao,et al."Continuous Measurement and Molecular Compositions of Atmospheric Water-Soluble Brown Carbon in the Nearshore Marine Boundary Layer of Northern China: Secondary Formation and Influencing Factors".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 128(2023).

入库方式： OAI收割

来源：合肥物质科学研究院

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