Dispersion parameters mean plume concentrations

Conservation of mass suggests a relation between the product of the peak values of mean plume concentrations and the corresponding dispersion parameters (o-j., cr ) for all averaging times... 

Transport involves the mean wind speed and direction. Dispersion is produced primarily by atmospheric turbulence and is discussed in more detail below. Transformations of the pollutants are due to chemical reactions, deposition, and interactions with liquid water. These constitute separate problems treated elsewhere. Most air pollution arises from continuous emitting sources, such as stacks or highways. They may be groimd or elevated sources. An important parameter in the determination of concentration is the effective source height, which is the sum of physical source height and plume rise. 

---