10/20/2023 Which of the following provides a measure of the average speed of air molecules?Read Now![]() This chapter deals only with transport and dispersion.ĭuring the past decade, the complexities of transport and dispersion of airborne pollutants associated with vehicular emissions have been studied with elaborate field and modeling experiments. ![]() Deposition processes, including precipitation, scavenging, and sedimentation, cause downward movement of pollutants in the atmosphere, which ultimately remove the pollutants to the ground surface. ![]() Dispersion results from local turbulence, that is, motions that last less than the time used to average the transport. Transport is movement caused by a time-averaged wind flow. The movement of pollutants in the atmosphere is caused by transport, dispersion, and deposition.
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