| Main Title |
Analysis of ensemble averaged concentrations and fluxes in a tracer puff / |
| Author |
Hutcheson, Main R.
|
| Other Authors |
|
| 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 |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| 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. |
| Abstract |
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. |
| Notes |
Project Officer: Kenneth L. Demerjian. School of Meteorology, University of Oklahoma Contract Number: 804507 "January 1979." "EPA-600/4-79-002." |
