Atmospheric chemistry and physics in the atmosphere of a developed megacity (London): An overview of the REPARTEE experiment and its conclusions
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.
2012
2019-07-17 22:15:45
1033
megacity, trace gas, urban atmosphere, atmospheric transport, chemical composition, aerosol
r6
Roy M
Harrison
70
Manuel
DallOsto
70
David C S
Beddows
70
Alistair J
Thorpe
70
William J
Bloss
70
James D
Allan
70
Hugh
Coe
70
James R
Dorsey
70
Martin W
Gallagher
70
Claire
Martin
70
John
Whitehead
70
Paul I
Williams
70
Roderick L
Jones
70
Justin M
Langridge
70
A K
Benton
70
Stephen M
Ball
70
Ben
Langford
70
C Nicholas
Hewitt
70
Brian
Davison
70
Damien
Martin
70
K Fredrik
Peterson
70
Stephen J
Henshaw
70
Iain R.
White
70
Dudley E
Shallcross
70
Janet F
Barlow
70
Tyrone
Dunbar
70
Fay
Davies
70
Eiko
Nemitz
70
Gavin J
Phillips
70
Carole
Helfter
70
Chiara F
Di Marco
70
Steven
Smith
70
COBISS_ID
3
5420539
DOI
15
10.5194/acp-12-3065-2012
NUK URN
18
URN:SI:UNG:REP:FYJRX4G9
acp-12-3065-2012.pdf
4890438
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2019-07-18 11:19:26
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Izvorni URL
2019-07-18 11:19:34