Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2019.104799 |
Classifying aerosol particles through the combination of optical and physical-chemical properties: Results from a wintertime campaign in Rome (Italy) | |
Valentini, S.1,2; Barnaba, F.3; Bernardoni, V1,2; Calzolai, G.4; Costabile, F.3; Di Liberto, L.3; Forello, A. C.1,2; Gobbi, G. P.3; Gualtieri, M.5; Lucarelli, F.4,6; Nava, S.4,6; Petralia, E.5; Valli, G.1,2; Wiedensohler, A.7; Vecchi, R.1,2 | |
2020-05-01 | |
发表期刊 | ATMOSPHERIC RESEARCH
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ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2020 |
卷号 | 235 |
文章类型 | Article |
语种 | 英语 |
国家 | Italy; Germany |
英文摘要 | The "Carbonaceous Aerosol in Rome and Environs" (CARE) experiment took place at a Mediterranean urban background site in Rome (Italy) deploying a variety of instrumentation to assess aerosol physical-chemical and optical properties with high-time resolution (from 1 min to 2 h). In this study, aerosol optical properties, chemical composition, and size distribution data were examined with a focus on the analysis of several intensive optical properties obtained from multi-wavelength measurements of aerosol scattering and absorption coefficients. The spectral behaviour of several quantities related to both aerosol composition and size was explored, analysing their high-time resolved temporal patterns and combining them in order to extract the maximum information from all the available data. A methodology to separate aerosol types using optical data only is here proposed and applied to an urban area characterised by a complex mixture of particles. A key is given to correctly disentangle cases that could not be distinguished observing only one or few parameters, but that can be clearly separated using a suitable ensemble of optical properties. The SSCAAE, i.e. the wavelength dependence of the Single Scattering co-albedo 1-SSA (where SSA is the Single Scattering Albedo) - that efficiently responds to both aerosol size and chemical composition - resulted to be the best optical intensive parameter to look at for the discrimination between episodes characterised by specific aerosol types (e.g. sea salt, Saharan dust) and more mixed conditions dominated by local emissions. However, this study also highlighted that it is necessary to combine temporal patterns of different optical parameters to robustly associate SSCAAE features to specific aerosol types. In addition, the complete chemical speciation and the high-time resolved size distribution were used to confirm the aerosol types identified via a combination of aerosol optical properties. Look-up tables with most suitable ranges of values for optical variables were produced; therefore, these pieces of information can be used at the same site or at locations with similar features to quickly identify the occurrence of aerosol episodes. Graphical frameworks (both from the literature and newly designed) are also proposed; for each scheme features, advantages, and limitations are discussed. |
英文关键词 | Intensive optical properties High time resolution Aerosol classification schemes |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000525322800009 |
WOS关键词 | SAHARAN DUST ; LIGHT-ABSORPTION ; BLACK CARBON ; AIR-QUALITY ; WAVELENGTH DEPENDENCE ; SCATTERING ; AETHALOMETER ; DESERT ; PM2.5 ; SIZE |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/278854 |
专题 | 地球科学 |
作者单位 | 1.Univ Milan, Dept Phys, I-20133 Milan, Italy; 2.INFN Milan, I-20133 Milan, Italy; 3.CNR, Inst Atmospher Sci & Climate, Via Fosso del Cavaliere 100, I-00133 Rome, Italy; 4.INFN Florence, I-50019 Sesto Fiorentino, Italy; 5.ENEA, SSPT, MET, Atmospher Pollut Lab INAT, Via Martiri di Monte Sole 4, I-40129 Bologna, Italy; 6.Univ Firenze, Dept Phys & Astron, I-50121 Florence, Italy; 7.Leibniz Inst Tropospher Res, Permoserstr 15, D-04318 Leipzig, Germany |
推荐引用方式 GB/T 7714 | Valentini, S.,Barnaba, F.,Bernardoni, V,et al. Classifying aerosol particles through the combination of optical and physical-chemical properties: Results from a wintertime campaign in Rome (Italy)[J]. ATMOSPHERIC RESEARCH,2020,235. |
APA | Valentini, S..,Barnaba, F..,Bernardoni, V.,Calzolai, G..,Costabile, F..,...&Vecchi, R..(2020).Classifying aerosol particles through the combination of optical and physical-chemical properties: Results from a wintertime campaign in Rome (Italy).ATMOSPHERIC RESEARCH,235. |
MLA | Valentini, S.,et al."Classifying aerosol particles through the combination of optical and physical-chemical properties: Results from a wintertime campaign in Rome (Italy)".ATMOSPHERIC RESEARCH 235(2020). |
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