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| Titel |
Atmospheric chemistry and physics in the atmosphere of a developed megacity (London): an overview of the REPARTEE experiment and its conclusions |
| VerfasserIn |
R. M. Harrison, M. Dall'Osto, D. C. S. Beddows, A. J. Thorpe, W. J. Bloss, J. D. Allan, H. Coe, J. R. Dorsey, M. Gallagher, C. Martin, J. Whitehead, P. I. Williams, R. L. Jones, J. M. Langridge, A. K. Benton, S. M. Ball, B. Langford, C. N. Hewitt, B. Davison, D. Martin, K. F. Petersson, S. J. Henshaw, I. R. White, D. E. Shallcross, J. F. Barlow, T. Dunbar, F. Davies, E. Nemitz, G. J. Phillips, C. Helfter, C. F. Marco, S. Smith |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 12, no. 6 ; Nr. 12, no. 6 (2012-03-30), S.3065-3114 |
| Datensatznummer |
250010951
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| Publikation (Nr.) |
 copernicus.org/acp-12-3065-2012.pdf |
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| Zusammenfassung |
| The REgents PARk and Tower Environmental Experiment (REPARTEE) comprised two
campaigns in London in October 2006 and October/November 2007. The experiment
design involved measurements at a heavily trafficked roadside site, two urban
background sites and an elevated site at 160–190 m above ground on the
BT Tower, supplemented in the second campaign by Doppler lidar measurements
of atmospheric vertical structure. A wide range of measurements of airborne
particle physical metrics and chemical composition were made as well as
measurements of a considerable range of gas phase species and the fluxes of
both particulate and gas phase substances. Significant findings include
(a) demonstration of the evaporation of traffic-generated nanoparticles during
both horizontal and vertical atmospheric transport; (b) generation of a large
base of information on the fluxes of nanoparticles, accumulation mode
particles and specific chemical components of the aerosol and a range of gas
phase species, as well as the elucidation of key processes and comparison
with emissions inventories; (c) quantification of vertical gradients in
selected aerosol and trace gas species which has demonstrated the important
role of regional transport in influencing concentrations of sulphate, nitrate
and secondary organic compounds within the atmosphere of London;
(d) generation of new data on the atmospheric structure and turbulence above
London, including the estimation of mixed layer depths; (e) provision of new
data on trace gas dispersion in the urban atmosphere through the release of
purposeful tracers; (f) the determination of spatial differences in aerosol
particle size distributions and their interpretation in terms of sources and
physico-chemical transformations; (g) studies of the nocturnal oxidation of
nitrogen oxides and of the diurnal behaviour of nitrate aerosol in the urban
atmosphere, and (h) new information on the chemical composition and source
apportionment of particulate matter size fractions in the atmosphere of
London derived both from bulk chemical analysis and aerosol mass spectrometry
with two instrument types. |
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