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Investigation of a river-tunnel effect on PM2.5 concentrations in New York City subway stations
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2 2023
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Source: Transp Res D Transp Environ. 115
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Alternative Title:Transp Res D Transp Environ
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Description:It is well-documented that subway stations exhibit high fine particulate matter (PM|) concentrations. Little is known about the potential of river-tunnels to increase PM| concentrations in subways. We hypothesized a "river-tunnel" effect exists: Stations adjacent to poorly ventilated tunnels that travel beneath rivers exhibit higher PM| concentrations than more distant stations. Accordingly, the PM| concentrations were monitored at stations adjacent to and two- and three-stations distant from the river-tunnel. Multivariate linear regression analysis was conducted to disentangle how proximity to a river-tunnel and other factors (e.g., depth) influence concentrations. Stations adjacent to a river-tunnel had 80-130% higher PM| concentrations than more distant stations. Moreover, distance from a river-tunnel was the strongest PM|-influencing factor This distance effect was not observed at underground stations adjacent to a river-bridge. The "river-tunnel" effect explains some of the inter-station variability in subway PM| concentrations. These results support the need for improving ventilation systems in subways.
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Pubmed ID:36711192
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Pubmed Central ID:PMC9879276
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Volume:115
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[PDF-1.03 MB]
