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GROUND-LEVEL CONCENTRATIONS DUE TO FUMIGATION INTO AN ENTRAINING MIXED LAYER
Citation:
Deardorff, J. AND G. Willis. GROUND-LEVEL CONCENTRATIONS DUE TO FUMIGATION INTO AN ENTRAINING MIXED LAYER. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-82/191 (NTIS PB82248055), 1981.
Description:
Laboratory measurements on fumigation into a convectively mixed layer indicate how the near surface concentration behaves with time. For two categories of entrainment rate, slow and fast, the experiments indicate how the ensemble-averaged concentration near the surface reaches a greater maximum in less time for the more rapid entrainment. For the two categories of entrainment studied, graphs are presented showing how the maximum time-averaged near-surface concentration in the horizontally homogeneous situation depends on averaging time and upon the angle between the wind velocity inside the mixed layer and just above. In the steady lake-breeze situation the maximum mean value found in the laboratory is an upper limit to the maximum time-averaged value inland of the shoreline because of the absence of downstream diffusion in the laboratory experiments.