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Main Title Diffusion in the Stably Stratified Atmospheric Boundary Layer.
Author Hunt, J. C. R. ;
CORP Author American Meteorological Society, Boston, MA. ;Cambridge Univ. (England). Dept. of Applied Mathematics and Theoretical Physics.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab.
Year Published 1985
Report Number EPA/600/J-85/329;
Stock Number PB86-171659
Additional Subjects Plumes ; Air pollution ; Transport properties ; Mathematical models ; Industrial wastes ; Reprints ; Air quality ; Lagrangian functions
Library Call Number Additional Info Location Last
NTIS  PB86-171659 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 12p
The assumptions, techniques and methods of improving Gaussian plume modeling are briefly reviewed. Then the statistical theory for the diffusion of a substance S into a turbulent flow in homogeneous and inhomogeneous flows, and neutral and stably stratified flows is introduced. In stably stratified flows the mixing of the temperature and the substance S between fluid elements is of critical importance in determining the growth of a plume, so that the plume's depth is not in general determined by the displacements of fluid elements through the source, not by the conventional Lagrangian statistics. But the plume depth, far downwind of the source, can be related to the local thermal diffusivity in the atmospheric boundary layer. The conditions are deduced under which this result can be used in stable conditions. The structure of turbulence in the stable boundary layer (SBL) is discussed.