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Article
Some Simple Statistical Models For Relative And Absolute Dispersion
Observations of the dispersion of a contaminant plume in the atmospheric boundary layer, obtained using a Lidar, are analysed in the coordinate frame relative to the instantaneous centre of mass of the plume, ...
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Article
A Concentration pdf for the Relative Dispersion of a Contaminant Plume in the Atmosphere
Observations of the dispersion of a contaminant plume in theatmospheric boundary layer, obtained using a Lidar, are analysedin a coordinate frame relative to the instantaneous centre of massof the plume. To im...
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Article
The High Concentration Tails Of The Probability Density Function Of A Dispersing Scalar In The Atmosphere
The distribution function for concentrations of a scalar pollutant dispersing in the turbulent atmosphere has a finite domain that is bounded above and below. Three methods, based on extreme value statistics, ...
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Article
Dosages from instantaneous releases of dense gases in wind tunnels and into a neutrally stable atmosphere
We study the doses generated by instantaneously released dense gas clouds. The dose is of practical importance since it is widely used as a measure of the harmful effect of an exposure. We take the doses from ...
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Article
Fluctuations in dense gas concentrations measured in a wind-tunnel
Concentration time series from FID (flame ionisation detector) sensors and catharometers downstream of an instantaneous release of dense gas contaminants are analysed by statistical methods. For each experimen...
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Article
The pitfalls of thresholding atmospheric dispersion data
Atmospheric dispersion data are invariably corrupted by random noise and perhaps baseline drift giving rise to unreal negative values. This paper shows that the indiscriminate use of thresholding can give rise...
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Article
The treatment of atmospheric dispersion data in the presence of noise and baseline drift
Recently large quantities of data from many different field experiments have become available to facilitate the examination of various proposed models of atmospheric dispersion. However, these data sets are in...
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Article
The structure and magnitude of concentration fluctuations
This paper is concerned with the science of turbulent diffusion and not, except incidentally, with its numerous practical applications. It discusses some recent research, particularly that by the authors and t...
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Chapter and Conference Paper
The Incorporation of Wind Shear Effects into Box Models of Heavy Gas Dispersion
Box models are widely used in predicting the potential hazards associated with the accidental release of heavy gas clouds, and this paper discusses whether, and how, such models should be amended to incorporat...