Atmospheric conditions not only specify the path taken by the air from pollution source to affected target but determine the extent to which the pollutant becomes diluted or chemically altered by the time it reaches the target. The atmosphere’s role as transporter of pollution is obvious but perhaps the wide variation in its power to dilute is not so well appreciated. Reflect for a moment on the fact that on a day when a large metropolitan area is enjoying sparkling clear air, unlimited visibility, deep blue sky--on that day there probably is just as much aerial contamination being injected into the atmosphere as on the most smoggy day on record. This vast difference in dilution can be ascribed simply to a difference in atmospheric configuration. Our purpose here is to examine the basic relationships between the structure and motion of the lowest layers of the atmosphere and the transport and dilution of introduced contaminants.
KeywordsBuoyancy Force Eddy Diffusion Inversion Layer Cyclonic Storm Strong Inversion
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