Record Display for the EPA National Library Catalog


Main Title Analysis of ensemble averaged concentrations and fluxes in a tracer puff /
Author Hutcheson, Main R.
Other Authors
Author Title of a Work
Demerjian, Kenneth L.
Hutcheson, Main R.
CORP Author Oklahoma Univ., Norman. School of Meteorology.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Publisher Environmental Sciences Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1979
Report Number EPA-600/4-79-002; EPA-804507
Stock Number PB-292 489
OCLC Number 53282514
Additional Subjects Air pollution ; Atmospheric diffusion ; Flux density ; Mathematical models ; Isotopic labeling ; Concentration(Composition) ; Revisions ; Krypton 85 ; Tracer studies ; Point sources ; Numerical solution ; Gaussian plume models
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600-4-79-002 Headquarters Library/Washington,DC 04/01/2014
EKBD  EPA-600/4-79-002 Research Triangle Park Library/RTP, NC 10/24/2003
ELBD ARCHIVE EPA 600-4-79-002 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD RPS EPA 600-4-79-002 repository copy AWBERC Library/Cincinnati,OH 10/17/2014
ESAD  EPA 600-4-79-002 Region 10 Library/Seattle,WA 09/12/2017
NTIS  PB-292 489 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation xiii, 97 pages : charts ; 28 cm.
Ensemble averaged fluxes and concentrations in a tracer puff diffusing in the atmospheric surface layer were analyzed. The analysis used radiation data published by the Battelle Memorial Institute. Fluxes that satisfy the diffusion equation for a Gaussian puff with an arbitrary diffusion rate were obtained from the gradient transfer hypothesis, using the proper diffusivities. These fluxes were used as estimates of the ensemble averaged fluxes in the surface layer. The radiation data, however, were too sparse to use alone in analyzing the tracer concentrations. Therefore, the data were combined with a modified Gaussian distribution in a variational technique to obtain concentration values. Since the ensemble averaged concentration distribution was more nearly normal than the distribution in an individual puff, the concentration estimates were obtained from a model using a Gaussian distribution in the horizontal, which constrained the estimates as close to the analyzed concentrations as possible. The concentration and flux estimates were combined with the diffusion equation in a variational technique. The analyzed fluxes and concentrations obtained were close to the estimates and satisfied the diffusion equation. The values are assumed to be the true ensemble averaged concentrations and fluxes for the puffs examined.
Project Officer: Kenneth L. Demerjian. School of Meteorology, University of Oklahoma Contract Number: 804507 "January 1979." "EPA-600/4-79-002."