Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1029/2018JD028602 |
Microscopic Observations of Core-Shell Particle Structure and Implications for Atmospheric Aerosol Remote Sensing | |
Unga, Florin1,2; Choel, Marie2; Derimian, Yevgeny1; Deboudt, Karine3; Dubovik, Oleg1; Goloub, Philippe1 | |
通讯作者 | Unga, Florin ; Derimian, Yevgeny |
来源期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
![]() |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:24页码:13944-13962 |
英文摘要 | Although atmospheric aerosol particles can have complex heterogeneous microstructure, simplified homogeneous particle models are often used in remote sensing applications. In this study, the internal structure of individual atmospheric particles was imaged with the aim of parameterizing particle structural heterogeneity. To this end, ambient urban pollution, desert dust, and biomass burning particles were sampled in northern Europe and western Africa and analyzed by transmission electron microscopy coupled with energy dispersive X-ray spectroscopy. Among 8,441 observed particles, about 60% of urban and 20% of desert dust particles presented residuals of coating compounds in the form of a halo surrounding a solid core. Graphic outlining of core and halo areas by image analysis revealed a dependence between halo and core dimensions as well as a greater ratio of halos thickness to total particle diameter (core plus halo) for smaller cores than for larger ones. In the case of urban pollution, the mean ratio for submicrometer and supermicrometer size fractions was 0.25 and 0.19, respectively. The corresponding mean values in the desert dust case were somewhat lower (0.22 and 0.14, respectively), but show a similar decreasing trend. Under the assumption that the halo dimension is proportional to the thickness of the particle shell, the obtained core versus shell dependencies were implemented in numerical calculations of aerosol optical characteristics. Different scenarios of the core-shell dependencies were analyzed with respect to the influence on aerosol optical characteristics, bringing insights into sensitivity to parameterization of the core-shell particle model in remote sensing algorithms. |
英文关键词 | optical properties of core-shell aerosol particles core-shell aerosols parameterization in remote sensing algorithms microphysical properties and chemical composition of aerosols urban pollution desert dust TEM EDX |
类型 | Article |
语种 | 英语 |
国家 | France |
收录类别 | SCI-E |
WOS记录号 | WOS:000455876300018 |
WOS关键词 | ATOMIC-FORCE MICROSCOPY ; MINERAL DUST PARTICLES ; OPTICAL-PROPERTIES ; BLACK-CARBON ; INDIVIDUAL-PARTICLE ; MIXING STATE ; CHEMICAL-COMPOSITION ; LIGHT-SCATTERING ; HETEROGENEOUS CHEMISTRY ; HYGROSCOPIC PROPERTIES |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/210990 |
作者单位 | 1.Univ Lille, CNRS, UMR 8518, LOA, Lille, France; 2.Univ Lille, CNRS, UMR 8516, LASIR,Lab Spectrochim Infrarouge & Raman, Lille, France; 3.Univ Littoral Cote dOpale, CNRS, EA 4493, LPCA, Dunkerque, France |
推荐引用方式 GB/T 7714 | Unga, Florin,Choel, Marie,Derimian, Yevgeny,et al. Microscopic Observations of Core-Shell Particle Structure and Implications for Atmospheric Aerosol Remote Sensing[J],2018,123(24):13944-13962. |
APA | Unga, Florin,Choel, Marie,Derimian, Yevgeny,Deboudt, Karine,Dubovik, Oleg,&Goloub, Philippe.(2018).Microscopic Observations of Core-Shell Particle Structure and Implications for Atmospheric Aerosol Remote Sensing.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(24),13944-13962. |
MLA | Unga, Florin,et al."Microscopic Observations of Core-Shell Particle Structure and Implications for Atmospheric Aerosol Remote Sensing".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.24(2018):13944-13962. |
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。