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DOI | 10.5194/acp-20-2489-2020 |
A robust clustering algorithm for analysis of composition-dependent organic aerosol thermal desorption measurements | |
Li, Ziyue1; 39;Ambro, Emma L.2 | |
2020-03-02 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2020 |
卷号 | 20期号:4页码:2489-2512 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Finland; Peoples R China; Switzerland |
英文摘要 | One of the challenges of understanding atmospheric organic aerosol (OA) particles stems from its complex composition. Mass spectrometry is commonly used to characterize the compositional variability of OA. Clustering of a mass spectral dataset helps identify components that exhibit similar behavior or have similar properties, facilitating understanding of sources and processes that govern compositional variability. Here, we developed an algorithm for clustering mass spectra, the noise-sorted scanning clustering (NSSC), appropriate for application to thermal desorption measurements of collected OA particles from the Filter Inlet for Gases and AEROsols coupled to a chemical ionization mass spectrometer (FIGAERO-CIMS). NSSC, which extends the common density-based special clustering of applications with noise (DBSCAN) algorithm, provides a robust, reproducible analysis of the FIGAERO temperature-dependent mass spectral data. The NSSC allows for the determination of thermal profiles for compositionally distinct clusters of mass spectra, increasing the accessibility and enhancing the interpretation of FIGAERO data. Applications of NSSC to several laboratory biogenic secondary organic aerosol (BSOA) systems demonstrate the ability of NSSC to distinguish different types of thermal behaviors for the components comprising the particles along with the relative mass contributions and chemical properties (e.g., average molecular formula) of each mass spectral cluster. For each of the systems examined, more than 80% of the total mass is clustered into 9-13 mass spectral clusters. Comparison of the average thermograms of the mass spectral clusters between systems indicates some commonality in terms of the thermal properties of different BSOA, although with some system-specific behavior. Application of NSSC to sets of experiments in which one experimental parameter, such as the concentration of NO, is varied demonstrates the potential for mass spectral clustering to elucidate the chemical factors that drive changes in the thermal properties of OA particles. Further quantitative interpretation of the thermograms of the mass spectral clusters will allow for a more comprehensive understanding of the thermochemical properties of OA particles. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000518768800002 |
WOS关键词 | ALPHA-PINENE OZONOLYSIS ; MASS-SPECTROMETRY ; MOLECULAR COMPOSITION ; INITIATED OXIDATION ; URBAN-ENVIRONMENT ; VOLATILITY ; PARTICLES ; GAS ; SOA ; CLASSIFICATION |
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/278654 |
专题 | 地球科学 |
作者单位 | 1.Univ Calif Davis, Atmospher Sci Grad Grp, Davis, CA 95616 USA; 2.Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA; 3.Univ Washington, Dept Chem, Seattle, WA 98195 USA; 4.Univ Eastern Finland, Dept Appl Phys, Kuopio, Finland; 5.Pacific Northwest Natl Lab, Atmospher Sci & Global Change Div, Richland, WA 99352 USA; 6.Univ Calif Davis, Dept Civil & Environm Engn, Davis, CA 95616 USA; 7.Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, Shanghai, Minhang Distric, Peoples R China; 8.US EPA, Oak Ridge Inst Sci & Educ, Res Triangle Pk, NC 27711 USA; 9.Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, 4600 Rickenbacker Causeway, Miami, FL 33149 USA; 10.TofWerk AG, Thun, Switzerland; 11.Harbin Inst Technol, Sch Environm, Harbin, Heilongjiang, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Ziyue,39;Ambro, Emma L.. A robust clustering algorithm for analysis of composition-dependent organic aerosol thermal desorption measurements[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(4):2489-2512. |
APA | Li, Ziyue,&39;Ambro, Emma L..(2020).A robust clustering algorithm for analysis of composition-dependent organic aerosol thermal desorption measurements.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(4),2489-2512. |
MLA | Li, Ziyue,et al."A robust clustering algorithm for analysis of composition-dependent organic aerosol thermal desorption measurements".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.4(2020):2489-2512. |
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