Optical characteristics and source apportionment of brown carbon in winter PM2.5 over Yulin in Northern China
文献类型：期刊论文
| 作者 | Sun, Jian2; Zhang, Qian2; Xu, Hongmei2; Wang, Linqing2; Wu, Jiamin2; Tian, Jie2; Lei, Yali1,2; Shen, Zhenxing1,2; Wang, Qiyuan1; Zhang, Tian2 |
| 刊名 | ATMOSPHERIC RESEARCH
 |
| 出版日期 | 2018-11-15 |
| 卷号 | 213期号:5页码:27-33 |
| 关键词 | Brown Carbon Coal Combustion Source Apportionment |
| DOI | 10.1016/j.atmosres.2018.05.018 |
| 文献子类 | Article |
| 英文摘要 | In this study, daily PM2.5 samples were collected at an urban site in Yulin of Northern China during a winter season. Eight carbon fractions, 13 kinds of polycyclic aromatic hydrocarbons (PAHs), and nine water-soluble ions in PM2.5 were measured. The light-absorption characteristics of brown carbon (BrC) both in water and in methanol extracts were evaluated and quantified. The total quantified PAHs exhibited high concentrations (228.4 +/- 52.6 ng m(-3)), contributing 0.2% of the PM2.5 mass. High indeno[1,2,3-cd]pyrene/(indeno[1,2,3-cd] pyrene + benzo[ghi]-perylene) ratio but low NO3-/SO42- ratio revealed the important contribution of coal combustion to PM2.5. The absorption coefficient (b(abs)) for methanol extracts measured at 365 nm averaged 27.5 +/- 12.0 Mm(-1). Light absorption by methanol extracts exhibited strong wavelength dependence, with an average absorption Angstrom exponent of 5.2 in the 330-400 nm range. The mass absorption cross section (for methanol extracts averaged 1.4 +/- 0.4 m(2)g(-1) by normalizing b(abs) measured at 365 nm to organic carbon mass. A relatively strong positive relationship between b(abs, methanol) and benzo[a]pyrene as well as with six carbon fractions indicated the important contribution of coal burning to BrC. Source apportionment based on the positive matrix factorization receptor model and multiple linear regression showed that residential coal combustion accounted for 37.4% of b(abs365,methanol). The estimated relative radiative forcing by methanol-soluble organic carbon relative to elemental carbon was 36.9% at 300-400 nm. |
| WOS关键词 | SOLUBLE ORGANIC-CARBON ; MASS ABSORPTION EFFICIENCY ; LIGHT-ABSORPTION ; PARTICULATE MATTER ; ELEMENTAL CARBON ; CHEMICAL CHARACTERISTICS ; VISIBILITY IMPAIRMENT ; SPECTRAL DEPENDENCE ; AEROSOL COMPOSITION ; SIZE DISTRIBUTION |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000442169800003 |
| 源URL | [http://ir.ieecas.cn/handle/361006/5115]  |
| 专题 | 地球环境研究所_粉尘与环境研究室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Key Lab Aerosol Chem & Phys, Xian 710049, Shaanxi, Peoples R China 2.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Jian,Zhang, Qian,Xu, Hongmei,et al. Optical characteristics and source apportionment of brown carbon in winter PM2.5 over Yulin in Northern China[J]. ATMOSPHERIC RESEARCH,2018,213(5):27-33. |
| APA | Sun, Jian.,Zhang, Qian.,Xu, Hongmei.,Wang, Linqing.,Wu, Jiamin.,...&Cao, Junji.(2018).Optical characteristics and source apportionment of brown carbon in winter PM2.5 over Yulin in Northern China.ATMOSPHERIC RESEARCH,213(5),27-33. |
| MLA | Sun, Jian,et al."Optical characteristics and source apportionment of brown carbon in winter PM2.5 over Yulin in Northern China".ATMOSPHERIC RESEARCH 213.5(2018):27-33. |
入库方式： OAI收割
来源：地球环境研究所
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