Evaluation and modeling of the size fractionated aerosol particle number concentration measurements nearby a major road in Helsinki – Part II: Aerosol measurements within the SAPPHIRE project

Hussein, T., Kukkonen, J., Korhonen, H., Pohjola, M., Pirjola, L., Wraith, Darren, Harkonen, J., Teinila, K., Koponen, I. K., Karppinen, A., Hillamo, R., & Kulmala, M. (2007) Evaluation and modeling of the size fractionated aerosol particle number concentration measurements nearby a major road in Helsinki – Part II: Aerosol measurements within the SAPPHIRE project. Atmospheric Chemistry and Physics, 7(15), pp. 4081-4094.

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Abstract

This study presents an evaluation and modeling exercise of the size fractionated aerosol particle number concentrations measured nearby a major road in Helsinki during 23 August–19 September 2003 and 14 January–11 February 2004. The available information also included electronic traffic counts, on-site meteorological measurements, and urban background particle number size distribution measurement. The ultrafine particle (UFP, diameter<100 nm) number concentrations at the roadside site were approximately an order of magnitude higher than those at the urban background site during daytime and downwind conditions. Both the modal structure analysis of the particle number size distributions and the statistical correlation between the traffic density and the UFP number concentrations indicate that the UFP were evidently from traffic related emissions. The modeling exercise included the evolution of the particle number size distribution nearby the road during downwind conditions. The model simulation results revealed that the evaluation of the emission factors of aerosol particles might not be valid for the same site during different time.

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ID Code: 15059
Item Type: Journal Article
Refereed: Yes
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ISSN: 1680-7324
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2007 (The authors)
Copyright Statement: © Author(s) 2007. This work is licensed under a Creative Commons Attribution 3.0 License - http://creativecommons.org/licenses/by/3.0/
Deposited On: 08 Oct 2008 00:00
Last Modified: 30 May 2016 23:51

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