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Insights on the combination of off-line and on-line measurement approaches for source apportionment studies.
Forello, Alice C; Cunha-Lopes, Inés; Almeida, Susana M; Alves, Célia A; Tchepel, Oxana; Crova, Federica; Vecchi, Roberta.
Affiliation
  • Forello AC; Department of Physics, Università degli Studi di Milano, Milan 20133, Italy; National Institute of Nuclear Physics INFN-Milan, Milan 20133, Italy.
  • Cunha-Lopes I; Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, 2695-066 Bobadela-LRS, Portugal.
  • Almeida SM; Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, 2695-066 Bobadela-LRS, Portugal.
  • Alves CA; Centre of Environmental and Marine Studies, Department of Environment, University of Aveiro, 3810-193 Aveiro, Portugal.
  • Tchepel O; CITTA, Faculty of Sciences and Technology, University of Coimbra, 3004-531 Coimbra, Portugal.
  • Crova F; Department of Physics, Università degli Studi di Milano, Milan 20133, Italy; National Institute of Nuclear Physics INFN-Milan, Milan 20133, Italy.
  • Vecchi R; Department of Physics, Università degli Studi di Milano, Milan 20133, Italy; National Institute of Nuclear Physics INFN-Milan, Milan 20133, Italy. Electronic address: roberta.vecchi@unimi.it.
Sci Total Environ ; 900: 165860, 2023 Nov 20.
Article in En | MEDLINE | ID: mdl-37516189
ABSTRACT
This paper presents a source apportionment study performed on a dataset collected at a trafficked site in Coimbra (Portugal) during the period December 2018-June 2019. The novelty of this work consists in the methodological approach used and the sensitivity study carried out to give hints to potential future applications. Indeed, a multi-time resolution and multi-parameter study was performed joining together aerosol data from 24-h chemically characterized samples and high-time resolution multi-wavelength absorption coefficients retrieved by an Aethalometer. A detailed sensitivity study on the most suitable combination of time resolution and uncertainties was carried out to obtain reliable physical and stable solutions over all analyses. In parallel, a regular EPA-PMF source apportionment study using chemical and optical variables averaged on 24 h is presented and discussed in comparison to the more complex multi-time and multi-parameter approach. Apart from results pertaining to the identification and relevance of different sources in Coimbra, the methodological results shown here can give guidance for readers who want to implement optical variables jointly with chemical ones in the same model run.
Key words

Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Prognostic_studies Language: En Journal: Sci Total Environ Year: 2023 Document type: Article Affiliation country: Italy

Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Prognostic_studies Language: En Journal: Sci Total Environ Year: 2023 Document type: Article Affiliation country: Italy