Measurement report: size-resolved particle effective density measured by the AAC-SMPS and implications for chemical composition
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Le résumé fourni par la source
Abstract. The effective density (ρeff) is closely associated with the aging process and can serve as a tracer for chemical composition. Recently, studies investigating the effect of particle size on density have been limited. In this study, size-resolved ρeff was characterized with a tandem of an aerodynamic aerosol classifier (AAC) and a scanning mobility particle sizer (SMPS) system during one month of observation in Hangzhou. The results indicate that the ρeff values of the particles exhibit a unimodal distribution, with average values ranging from 1.47 g/cm3 to 1.63 g/cm3, increasing as the particle diameter increases. The diurnal variation is more pronounced for small particles (dae <350 nm), which generally exhibit lower density during the day and higher density at night. The relationship between ρeff and particle diameter varies under different pollution conditions due to differences in the chemical composition of the particles. additive explanations (SHAPs) revealed good relationships between ρeff and the bulk composition of particles with diameters smaller than 350 nm. Since the size-resolved chemical composition of particles is still challenging, a new method to investigate the size-resolved chemical composition was proposed, in which the size-resolved composition can be derived from the ρeff and fixed material density of secondary inorganic aerosols (SIAs), organic aerosols (OAs) and black carbon (BC).
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Measurement report: size-resolved particle effective density measured by the AAC-SMPS and implications for chemical composition
- Date Crossref
- 25/11/2024
- Éditeur
- Copernicus GmbH
- Type
- posted-content
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Zhejiang University pays non établi dans la noticeUniversité ou école supérieure
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Zhejiang Environmental Monitoring Center pays non établi dans la noticeUniversité ou école supérieure
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College of Environmental and Resource Sciences pays non établi dans la noticeUniversité ou école supérieure
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Ecological and Environmental Monitoring Center of Zhejiang Province pays non établi dans la noticeInstitution
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ZJU-Hangzhou Global Scientific and Technological Innovation Center pays non établi dans la noticeInstitution
Zhejiang University, Zhejiang Environmental Monitoring Center et College of Environmental and Resource Sciences, avec 2 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.