Comparison of source apportionment targeting hot-spot concentration and average population exposure

IF 8.2 1区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Science of the Total Environment Pub Date : 2025-02-21 DOI:10.1016/j.scitotenv.2025.178857

Philippe Thunis , Enrico Pisoni , Stefano Zauli-Sajani , Alexander de Meij

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Abstract

Source apportionment (SA) is an essential first step in supporting the design of air quality plans. However, SA results can strongly be influenced by the choice of setting parameters, such as the indicator used. In this study, we assess how different choices of indicator for PM_2.5 (hot spot concentrations, average population exposure and average concentration) impact the SA results. Our analysis reveals that, in general, there is a good correlation between results obtained with these three indicators. The correlation is higher for sectors that are well-distributed spatially at city scale, such as residential and traffic, and lower for sectors characterized by important local emissions, such as waste and shipping. In most cases, results based on average indicators (average population exposure and average concentration) underestimates those based on the concentration hot spot location. Interestingly, we find that the choice of indicator has a strong impact on the estimation of the local contribution to air pollution in the city, but the relative share of the sectors is generally preserved across indicators. In other words, the priority sector remains similar, but the resulting scale of action can differ in some cities.

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来源期刊

Science of the Total Environment 环境科学-环境科学

CiteScore

17.60

自引率

10.20%

发文量

8726

审稿时长

2.4 months

期刊介绍： The Science of the Total Environment is an international journal dedicated to scientific research on the environment and its interaction with humanity. It covers a wide range of disciplines and seeks to publish innovative, hypothesis-driven, and impactful research that explores the entire environment, including the atmosphere, lithosphere, hydrosphere, biosphere, and anthroposphere. The journal's updated Aims & Scope emphasizes the importance of interdisciplinary environmental research with broad impact. Priority is given to studies that advance fundamental understanding and explore the interconnectedness of multiple environmental spheres. Field studies are preferred, while laboratory experiments must demonstrate significant methodological advancements or mechanistic insights with direct relevance to the environment.