| The characteristics of atmospheric brown carbon in Xi'an, inland China: sources, size distributions and optical properties | |
| Wu, Can1,2; Wang, Gehui1,2,3,4; Li, Jin2; Li, Jianjun2; Cao, Cong2; Ge, Shuangshuang1; Xie, Yuning1; Chen, Jianmin3,5; Li, Xingru1,6; Xue, Guoyan1; Wang, Xinpei1; Zhao, Zhuyu7; Cao, Fang7 | |
| Corresponding Author | Wang, Gehui(ghwang@geo.ecnu.edu.cn) |
| 2020-02-21 | |
| Source Publication | ATMOSPHERIC CHEMISTRY AND PHYSICS
 |
| ISSN | 1680-7316 |
| Volume | 20Issue:4Pages:2017-2030 |
| Abstract | To investigate the characteristics of atmospheric brown carbon (BrC) in the semiarid region of East Asia, PM2.5 and size-resolved particles in the urban atmosphere of Xi'an, inland China, during the winter and summer of 2017 were collected and analyzed for optical properties and chemical compositions. Methanol extracts (MeOH extracts) were more light-absorbing than water extracts (H2O extracts) in the optical wavelength of 300-600 nm and well correlated with nitrophenols, polycyclic aromatic hydrocarbons (PAHs) and oxygenated PAHs (r > 0.78). The light absorptions (abs(lambda=365 nm)) of H2O extracts and MeOH extracts in winter were 28 +/- 16 and 49 +/- 32Mm(-1), respectively, which are about 10 times higher than those in summer, mainly due to the enhanced emissions from biomass burning for house heating. Water-extracted BrC predominately occurred in the fine mode (< 2.1 mu m) during winter and summer, accounting for 81% and 65% of the total absorption of BrC, respectively. The light absorption and stable carbon isotope composition measurements showed an increasing ratio of abs(lambda=365 nm)-MeOH to abs(lambda=550 nm)-EC along with an enrichment of C-13 in PM2.5 during the haze development, indicating an accumulation of secondarily formed BrC (e.g., nitro-phenols) in the aerosol aging process. Positive matrix factorization (PMF) analysis showed that biomass burning, fossil fuel combustion, secondary formation, and fugitive dust are the major sources of BrC in the city, accounting for 55 %, 19 %, 16 %, and 10% of the total BrC of PM2.5, respectively. |
| DOI | 10.5194/acp-20-2017-2020 |
| WOS Keyword | POLYCYCLIC AROMATIC-HYDROCARBONS ; SECONDARY ORGANIC AEROSOL ; BIOMASS-BURNING AEROSOL ; LIGHT-ABSORPTION PROPERTIES ; CHEMICAL CHARACTERISTICS ; SOURCE APPORTIONMENT ; BLACK CARBON ; MOLECULAR CHARACTERIZATION ; SEASONAL-VARIATIONS ; POTENTIAL SOURCES |
| Indexed By | SCI ; SCI |
| Language | 英语 |
| Funding Project | National Nature Science Foundation of China[41773117] ; [2017YFC0210000] |
| WOS Research Area | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| Funding Organization | National Nature Science Foundation of China |
| WOS Subject | Environmental Sciences ; Meteorology & Atmospheric Sciences |
| WOS ID | WOS:000516713800004 |
| Publisher | COPERNICUS GESELLSCHAFT MBH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ieecas.cn/handle/361006/12743 |
| Collection | 粉尘与环境研究室 |
| Corresponding Author | Wang, Gehui |
| Affiliation | 1.East China Normal Univ, Sch Geog Sci, Minist Educ, Key Lab Geog Informat Sci, Shanghai 210062, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Phys & Chem, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 3.Inst Ecochongming, 3663 North Zhongshan Rd, Shanghai 200062, Peoples R China 4.Chinese Acad Sci, CAS Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China 5.Fudan Univ, Dept Environm Sci & Technol, Shanghai 200433, Peoples R China 6.Capital Normal Univ, Analyt & Testing Ctr, Dept Chem, Beijing 100048, Peoples R China 7.Nanjing Univ Informat Sci & Technol, Yale NUIST Ctr Atmospher Environm, Nanjing 210044, Peoples R China |
| Recommended Citation GB/T 7714 | Wu, Can,Wang, Gehui,Li, Jin,et al. The characteristics of atmospheric brown carbon in Xi'an, inland China: sources, size distributions and optical properties[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(4):2017-2030. |
| APA | Wu, Can.,Wang, Gehui.,Li, Jin.,Li, Jianjun.,Cao, Cong.,...&Cao, Fang.(2020).The characteristics of atmospheric brown carbon in Xi'an, inland China: sources, size distributions and optical properties.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(4),2017-2030. |
| MLA | Wu, Can,et al."The characteristics of atmospheric brown carbon in Xi'an, inland China: sources, size distributions and optical properties".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.4(2020):2017-2030. |
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