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Title:CityFlux perfluorocarbon tracer experiments
Authors:ID Petersson, Fredrik K, School of Chemistry, University of Bristol, Bristol, United Kingdom (Author)
ID Martin, Damien, School of Chemistry, University of Bristol, Bristol, United Kingdom (Author)
ID White, Iain R., School of Chemistry, University of Bristol, Bristol, United Kingdom (Author)
ID Henshaw, Stephen J, School of Chemistry, University of Bristol, Bristol, United Kingdom (Author)
ID Nickless, Graham, School of Chemistry, University of Bristol, Bristol, United Kingdom (Author)
ID Longley, Ian, SEAS, University of Manchester, Manchester, United Kingdom (Author)
ID Percival, Carl J, SEAS, University of Manchester, Manchester, United Kingdom (Author)
ID Gallagher, Martin, SEAS, University of Manchester, Manchester, United Kingdom (Author)
ID Shallcross, Dudley E., School of Chemistry, University of Bristol, Bristol, United Kingdom (Author)
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Language:English
Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:In June 2006, two perfluorocarbon tracer experiments were conducted in central Manchester UK as part of the CityFlux campaign. The main aim was to investigate vertical dispersion in an urban area during convective conditions, but dispersion mechanisms within the street network were also studied. Paired receptors were used in most cases where one receptor was located at ground level and one at roof level. One receptor was located on the roof of Portland Tower which is an 80m high building in central Manchester. Source receptor distances in the two experiments varied between 120 and 600 m. The results reveal that maximum concentration was sometimes found at roof level rather than at ground level implying the effectiveness of convective forces on dispersion. The degree of vertical dispersion was found to be dependent on source receptor distance as well as on building height in proximity to the release site. Evidence of flow channelling in a street canyon was also found. Both a Gaussian profile and a street network model were applied and the results show that the urban topography may lead to highly effective flow channelling which therefore may be a very important dispersion mechanism should the right meteorological conditions prevail. The experimental results from this campaign have also been compared with a simple urban dispersion model that was developed during the DAPPLE framework and show good agreement with this. The results presented here are some of the first published regarding vertical dispersion. More tracer experiments are needed in order to further characterise vertical concentration profiles and their dependence on, for instance, atmospheric stability. The impact of urban topography on pollutant dispersion is important to focus on in future tracer experiments in order to improve performance of models as well as for our understanding of the relationship between air quality and public health.
Keywords:air quality, atmospheric chemistry, concentration (composition), convective system, dispersion, public health, street canyon, tracer, urban area
Year of publishing:2010
Number of pages:5991-5997
Numbering:13, 10
PID:20.500.12556/RUNG-4634-3c9be217-88d3-f314-03dc-09076120e5c7 New window
COBISS.SI-ID:5418235 New window
DOI:10.5194/acp-10-5991-2010 New window
NUK URN:URN:SI:UNG:REP:FXTHXVOP
Publication date in RUNG:18.07.2019
Views:2930
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Record is a part of a journal

Title:Atmospheric Chemistry and Physics
Shortened title:Atmos. Chem. Phys.
Publisher:Copernicus
Year of publishing:2010
ISSN:16807316

Licences

License:CC BY-SA 4.0, Creative Commons Attribution-ShareAlike 4.0 International
Link:http://creativecommons.org/licenses/by-sa/4.0/
Description:This Creative Commons license is very similar to the regular Attribution license, but requires the release of all derivative works under this same license.
Licensing start date:17.07.2019

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