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• W3037974273 endingPage "115046" @default.
• W3037974273 startingPage "115046" @default.
• W3037974273 abstract "Conducting studies on sharp particulate matter (PM) gradients in Asian residential communities is difficult due to their complex building arrangements and various emission sources, particularly road traffic. In this study, a synthetic methodology, combining numerical simulations and minor field observations, was set up to investigate the dispersion of traffic-related PM in a typical Asian residential community and its contribution to PM exposure. A Lagrangian particle model (GRAL) was applied to estimate the spatiotemporal variation of the traffic-related PM increments within the community. A detailed topography dataset with 5 m horizontal resolution was used to simulate a micro-scale flow field. The model performance was comprehensively validated using both in-situ and mobile observations. The coefficient of determination (R2) of the simulated vs. observed PM2.5 reached 0.81 by an artery road, and 0.85 in alleys without significant road traffic. The maximum increments of kerbside PM exposure concentration contributed by road traffic during rush hour were found to be 38% (PM10) and 40% (PM2.5). This synthetic method was used to assess the impact of synoptic wind and canyon orientation on residents' PM2.5 exposure related to traffic exhaust. Perfect exponential decay curves of traffic-related PM2.5 were found within canyons. The decrease of road-traffic PM2.5 on five different floor levels, compared with that on kerbside levels, ranged between 42% and 100%. The results demonstrated that in complex Asian communities, Lagrangian particle models such as GRAL can simulate the spatial distribution of PM10 and PM2.5 and assess the residents' outdoor exposure." @default.
• W3037974273 created "2020-07-02" @default.
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• W3037974273 date "2020-11-01" @default.
• W3037974273 modified "2023-10-16" @default.
• W3037974273 title "Micro-scale particle simulation and traffic-related particle exposure assessment in an Asian residential community" @default.
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• W3037974273 doi "https://doi.org/10.1016/j.envpol.2020.115046" @default.
• W3037974273 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32791467" @default.
• W3037974273 hasPublicationYear "2020" @default.
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