Air pollution in a microclimate; the impact of different green barriers on the dispersion

Taleghani, M; Clark, AP; Swan, W; Mohegh, A

Abstract

This paper studies the impact of different green barriers on the dispersion of air pollution in
a neighbourhood. The study was performed with reference to air quality conditions in
Manchester, UK. Manchester experiences a high level of NO2. Measured results showed that
the average annual concentration level in 2018 was very close to the limit defined by
European Union legislation. Maximum and minimum NO2 concentrations occurred during
the winter and summer, respectively. Simulations of the dispersion of air pollution in a
hypothetical neighbourhood showed that NO2 level was decreased by the increase of air
temperature during the simulated day. In four perturbation scenarios, hedges and trees
with different heights were added to the neighbourhood as green barriers. Hedges
increased the pollution level near the street at the pedestrian level as a result of the
reduced wind speed. The simulations demonstrated that using the trees facilitated the
dispersion of pollution

Citation

Taleghani, M., Clark, A., Swan, W., & Mohegh, A. (2020). Air pollution in a microclimate; the impact of different green barriers on the dispersion. Science of the Total Environment, 711, 134649. https://doi.org/10.1016/j.scitotenv.2019.134649

• Journal Article Type: Article
• Acceptance Date: Sep 23, 2019
• Online Publication Date: Nov 25, 2019
• Publication Date: Apr 1, 2020
• Deposit Date: Nov 6, 2019
• Publicly Available Date: Nov 25, 2020
• Journal: Science of the Total Environment
• Print ISSN: 0048-9697
• Electronic ISSN: 1879-1026
• Publisher: Elsevier
• Volume: 711
• Pages: 134649
• DOI: https://doi.org/10.1016/j.scitotenv.2019.134649
• Publisher URL: https://doi.org/10.1016/j.scitotenv.2019.134649
• Related Public URLs: https://www.journals.elsevier.com/science-of-the-total-environment