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Keywords = NORTRIP

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16 pages, 2762 KiB  
Article
Mitigation of Suspendable Road Dust in a Subpolar, Oceanic Climate
by Brian Charles Barr, Hrund Ólöf Andradóttir, Throstur Thorsteinsson and Sigurður Erlingsson
Sustainability 2021, 13(17), 9607; https://doi.org/10.3390/su13179607 - 26 Aug 2021
Cited by 12 | Viewed by 4019
Abstract
Tire and road wear particles (TRWP) are a significant source of atmospheric particulate matter and microplastic loading to waterways. Road wear is exacerbated in cold climate by the widespread use of studded tires. The goal of this research was to assess the anthropogenic [...] Read more.
Tire and road wear particles (TRWP) are a significant source of atmospheric particulate matter and microplastic loading to waterways. Road wear is exacerbated in cold climate by the widespread use of studded tires. The goal of this research was to assess the anthropogenic levers for suspendable road dust generation and climatic conditions governing the environmental fate of non-exhaust particles in a wet maritime winter climate. Sensitivity analyses were performed using the NORTRIP model for the Capital region of Reykjavík, Iceland (64.1° N). Precipitation frequency (secondarily atmospheric relative humidity) governed the partitioning between atmospheric and waterborne PM10 particles (55% and 45%, respectively). Precipitation intensity, however, increased proportionally most the drainage to waterways via stormwater collection systems, albeit it only represented 5% of the total mass of dust generated in winter. A drastic reduction in the use of studded tires, from 46% to 15% during peak season, would be required to alleviate the number of ambient air quality exceedances. In order to achieve multifaceted goals of a climate resilient, resource efficient city, the most important mitigation action is to reduce overall traffic volume. Reducing traffic speed may help speed environmental outcomes. Full article
(This article belongs to the Special Issue Air Quality Characterisation and Modelling)
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