Airborne particulate matter at a bus station : concentration levels and governing parameters
Jamriska, Milan, Madl, Pierre, Morawska, Lidia, & Yip, Maricela (2005) Airborne particulate matter at a bus station : concentration levels and governing parameters. In Yang, X, Zhao, B, & Zhao, R (Eds.) Proceedings of the 10th International Conference on Indoor Air Quality and Climate (Indoor Air 2005), Tsinghua University Press, China, Beijing, pp. 1631-1635.
Traffic emissions are an important contributor to ambient air pollution, especially in large cities featuring extensive and high density traffic networks. Bus fleets represent a significant part of inner city traffic causing an increase in exposure to general public, passengers and drivers along bus routes and at bus stations. Limited information is available on quantification of the levels, and governing parameters affecting the air pollution exposure at bus stations. The presented study investigated the bus emissions-dominated ambient air in a large, inner city bus station, with a specific focus on submicrometer particles. The study’s objectives were (i) quantification of the concentration levels; (ii) characterisation of the spatio-temporal variation; (iii) identification of the parameters governing the emissions levels at the bus station and (iv) assessment of the relationship between particle concentrations measured at the street level (background) and within the bus station. The results show that up to 90% of the emissions at the station are ultrafine particles (smaller than 100 nm), with the concentration levels up to 10 times the value of urban ambient air background (annual) and up to 4 times the local ambient air background. The governing parameters affecting particle concentration at the station were bus flow rate and meteorological conditions (wind velocity). Particle concentration followed a diurnal trend, with an increase in the morning and evening, associated with traffic rush hours. Passengers’ exposure could be significant compared to the average outdoor and indoor exposure levels.
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|Item Type:||Conference Paper|
|Keywords:||Particles, Traffic, Emissions, Bus Station, Exposure|
|Subjects:||Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > ATMOSPHERIC SCIENCES (040100) > Atmospheric Sciences not elsewhere classified (040199)|
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Transport Engineering (090507)
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Science and Technology|
|Copyright Owner:||Copyright 2005 Please consult the authors.|
|Deposited On:||18 Jun 2009 00:35|
|Last Modified:||29 Feb 2012 23:17|
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