Exposure to ultrafine particles and PM2.5 in four Sydney transport modes

Knibbs, Luke D. and de Dear, Richard J. (2010) Exposure to ultrafine particles and PM2.5 in four Sydney transport modes. Atmospheric Environment, 44 26: 3224-3227. doi:10.1016/j.atmosenv.2010.05.026

Author Knibbs, Luke D.
de Dear, Richard J.
Title Exposure to ultrafine particles and PM2.5 in four Sydney transport modes
Journal name Atmospheric Environment   Check publisher's open access policy
ISSN 1352-2310
Publication date 2010-08-01
Sub-type Article (original research)
DOI 10.1016/j.atmosenv.2010.05.026
Open Access Status Not Open Access
Volume 44
Issue 26
Start page 3224
End page 3227
Total pages 4
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Language eng
Abstract Concentrations of ultrafine (<0.1 μm) particles (UFPs) and PM2.5 (<2.5 μm) were measured whilst commuting along a similar route by train, bus, ferry and automobile in Sydney, Australia. One trip on each transport mode was undertaken during both morning and evening peak hours throughout a working week, for a total of 40 trips. Analyses comprised one-way ANOVA to compare overall (i.e. all trips combined) geometric mean concentrations of both particle fractions measured across transport modes, and assessment of both the correlation between wind speed and individual trip means of UFPs and PM2.5, and the correlation between the two particle fractions. Overall geometric mean concentrations of UFPs and PM2.5 ranged from 2.8 (train) to 8.4 (bus) × 104 particles cm-3 and 22.6 (automobile) to 29.6 (bus) μg m-3, respectively, and a statistically significant difference (p < 0.001) between modes was found for both particle fractions. Individual trip geometric mean concentrations were between 9.7 × 103 (train) and 2.2 × 105 (bus) particles cm-3 and 9.5 (train) to 78.7 (train) μg m-3. Estimated commuter exposures were variable, and the highest return trip mean PM2.5 exposure occurred in the ferry mode, whilst the highest UFP exposure occurred during bus trips. The correlation between fractions was generally poor, and in keeping with the duality of particle mass and number emissions in vehicle-dominated urban areas. Wind speed was negatively correlated with, and a generally poor determinant of, UFP and PM2.5 concentrations, suggesting a more significant role for other factors in determining commuter exposure.
Keyword Commuter
Ultrafine particles
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Public Health Publications
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 39 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 46 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Mon, 07 Jan 2013, 19:01:51 EST by Luke Knibbs on behalf of Examinations