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Open Access Green as soon as Postprint is submitted to ZB.
Seasonal and diurnal variation of PM2.5 apparent particle density in urban air in Augsburg, Germany.
Environ. Sci. Technol. 42, 5087-5093 (2008)
The apparent particle density of particulate matter with aerodynamic diameter < 2.5 microm (rho2.5) was determined at an urban site in Augsburg, Germany and its correlation with chemical composition and meteorological conditions was investigated. rho2.5 showed strong day-to-day variation from 1.05 to 2.36 g cm(-3) (5 to 95% percentile), and nearly 64% of the daily variability could be explained by a multiple variable regression model. A minimum in the morning and afternoon (about 1.5 g cm(-3)), and a maximum (near 1.8 g cm(-3)) during midday was observed. The minima represent fresh primary aerosol emissions, which were related to traffic soot particles with low density due to their agglomerate structure, especially observed in the early morning hours of weekdays. The maximum is likely due to increased secondary particle production and the presence of more aged particles with the built-up of the convectively mixed boundary layer. rho2.5 has the potential to serve as a crude tracer for chemical composition and atmospheric processing and might play an important role when considering the associations between health effects and ambient particles.
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Publication type
Article: Journal article
Document type
Scientific Article
ISSN (print) / ISBN
0013-936X
e-ISSN
1520-5851
Quellenangaben
Volume: 42,
Issue: 14,
Pages: 5087-5093
Publisher
ACS
Publishing Place
Washington, DC
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Institute of Lung Biology (LHI)
Institute of Epidemiology (EPI)
Institute of Ecological Chemistry (IOEC)
Institute of Epidemiology (EPI)
Institute of Ecological Chemistry (IOEC)