Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-19-2917-2019 |
Accounting for the effects of nonideal minor structures on the optical properties of black carbon aerosols | |
Teng, Shiwen1,2; Liu, Chao1,2; Schnaiter, Martin3; Chakrabarty, Rajan K.4; Liu, Fengshan5 | |
2019-03-07 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
![]() |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2019 |
卷号 | 19期号:5页码:2917-2931 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Germany; USA; Canada |
英文摘要 | Black carbon (BC) aerosol is the strongest sunlight-absorbing aerosol, and its optical properties are fundamental to radiative forcing estimations and retrievals of its size and concentration. BC particles exist as aggregate structures with small monomers and are widely represented by the idealized fractal aggregate model. In reality, BC particles possess complex and nonideal minor structures besides the overall aggregate structure, altering their optical properties in unforeseen ways. This study introduces the parameter "volume variation" to quantify and unify different minor structures and develops an empirical relationship to account for their effects on BC optical properties from those of ideal aggregates. Minor structures considered are as follows: the polydispersity of monomer size, the irregularity and coating of the individual monomer, and necking and overlapping among monomers. The discrete dipole approximation is used to calculate the optical properties of aggregates with these minor structures. Minor structures result in scattering cross-section enhancement slightly more than that of absorption cross section, and their effects on the angle-dependent phase matrix as well as asymmetry factor are negligible. As expected, the effects become weaker with the increase in wavelength. Our results suggest that a correction ratio of 1.05 is necessary to account for the mass or volume normalized absorption and scattering of nonideal aggregates in comparison to ideal ones, which also applies to aggregates with multiple minor structures. In other words, the effects of minor structures are mainly contributed by their influence on particle volume/mass that cannot be ignored, and a relative difference of approximately 5% is noticed after removing the volume effects. Thus, accurate knowledge and evaluation of BC volume/mass are more important than those of the minor structures themselves. Most importantly, the simulations of optical properties of nonideal aggregates are greatly simplified by applying the empirical relationship because they can be directly obtained from those of the corresponding ideal aggregates, a volume/mass difference parameter, and the correction factor, i.e., 1.05, not the detailed minor structure information. We expect this convenient treatment to find wide applications for the accounting for the effects of nonideal minor structures on BC optical properties. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000460516700003 |
WOS关键词 | DISCRETE-DIPOLE APPROXIMATION ; PRIMARY PARTICLE-SIZE ; RADIATIVE PROPERTIES ; LIGHT-SCATTERING ; MIXING STATE ; SOOT AEROSOLS ; BROWN CARBON ; ABSORPTION ; MORPHOLOGY ; DISTRIBUTIONS |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27300 |
专题 | 地球科学 |
作者单位 | 1.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing 210044, Jiangsu, Peoples R China; 2.Nanjing Univ Informat Sci & Technol, Sch Atmospher Phys, Key Lab Aerosol Cloud Precipitat, China Meteorol Adm, Nanjing 210044, Jiangsu, Peoples R China; 3.Karlsruhe Inst Technol, Inst Meteorol & Climate Res, D-76021 Karlsruhe, Germany; 4.Washington Univ, Ctr Aerosol Sci & Engn, Dept Energy Environm & Chem Engn, St Louis, MO 63130 USA; 5.CNR, Measurement Sci & Stand, Black Carbon Metrol, Ottawa, ON K1A 0R6, Canada |
推荐引用方式 GB/T 7714 | Teng, Shiwen,Liu, Chao,Schnaiter, Martin,et al. Accounting for the effects of nonideal minor structures on the optical properties of black carbon aerosols[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(5):2917-2931. |
APA | Teng, Shiwen,Liu, Chao,Schnaiter, Martin,Chakrabarty, Rajan K.,&Liu, Fengshan.(2019).Accounting for the effects of nonideal minor structures on the optical properties of black carbon aerosols.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(5),2917-2931. |
MLA | Teng, Shiwen,et al."Accounting for the effects of nonideal minor structures on the optical properties of black carbon aerosols".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.5(2019):2917-2931. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论