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 | |
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 |
2023-06-27 | |
卷号 | 128 |
ISSN号 | 2169-897X |
DOI | 10.1029/2023JD038565 |
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. |
资助项目 | National Key Ramp;D Plan programs[2018YFC0213105] ; National Natural Science Foundation of China[42175119] |
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 |
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 |
内容类型 | 期刊论文 |
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). |
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