Tracer concentration profiles measured in central London as part of the REPARTEE campaign

• Published in: Atmospheric chemistry and physics discussions Vol. 9; no. 6; pp. 25245 - 25274
• Main Authors: Martin, D, Petersson, K F, White, IR, Henshaw, S J, Nickless, G, Lovelock, A, Barlow, J F, Dunbar, T, Wood, C R, Shallcross, DE
• Format: Journal Article
• Language: English
• Published: 25.11.2009
• Subjects: British Isles, England, Greater London, London
• ISSN: 1680-7367; 1680-7375

There have been relatively few tracer experiments carried out that have looked at vertical plume spread in urban areas. In this paper we present results from cyclic perfluorocarbon tracer experiments carried out in 2006 and 2007 in central London centred on the BT Tower as part of the REPARTEE (Regent's Park and Tower Environmental Experiment) campaign. The height of the tower gives a unique opportunity to study dispersion over a large vertical gradient. These gradients are then compared with classical Gaussian profiles of the relevant stability classes over a range of distances as well as interpretation of data with reference to both anemometry and LIDAR measurements made. Data are then compared with an operational model and contrasted with data taken in central London as part of the DAPPLE campaign looking at dosage compared with non-dimensionalised distance from source. Such analysis illustrates the feasibility of the use of these empirical correlations over these prescribed distances in central London.