Sol Kaufman
ABSTRACT
Various mathematical modeling approaches have been developed over the years to simulate the transport and diffusion of small particle aerosols in the atmosphere. The roles played by some important factors/mechanisms are briefly discussed, including the mean and turbulent components of the wind field, boundary conditions, particle size distribution, mode of dissemination, evaporation, and deposition. Expected-value models generally predict integrated dosage, deposition density, and aerosol “cloud” dimensions as functions of downwind location. Instrumented field trials of aerosol releases under various meteorological and environmental conditions can be valuable in helping to assess model validity. A literature survey identified 65 documented small particle aerosol field tests, mostly under Department of Defense auspices. Review of these tests enabled initial development of an input-output data base for selected aerosol trials. The scope and some limitations of the test data documents reviewed to date are noted. Recommendations are made, including the need for further development of stochastic aerosol modeling, to capture the highly variable nature of experimental observations.
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- Aerosol transport and diffusion data
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