| Main Title |
Relation of Urban Model Performance to Stability. |
| Author |
Turner, D. B. ;
Irwin, J. S. ;
|
| CORP Author |
Environmental Sciences Research Lab., Research Triangle Park, NC. |
| Year Published |
1983 |
| Report Number |
EPA-600/D-84-025; |
| Stock Number |
PB84-130418 |
| Additional Subjects |
Mathematical models ;
Air pollution ;
Sulfur dioxide ;
Concentration(Composition) ;
Comparison ;
Urban areas ;
Performance evaluation ;
Stability ;
Meteorology ;
Missouri ;
Saint Louis(Missouri)
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB84-130418 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
18p |
| Abstract |
The RAM model performance in estimating SO2 concentrations in St. Louis, MO for 1976 has been discussed in several previous papers by the authors. In these studies the model estimates were compared to the observed concentrations of SO2 at 13 sites in the St. Louis metropolitan area. An analysis is made evaluating the RAM model performance in estimating the infrequently occurring high concentration values. Previous comparisons have been criticized for not assuring that the modeled high concentration values occurred during similar meteorological conditions as when the high concentration values occurred during similar meteorological conditions as when the high concentrations were observed. To address these concerns, the data are sorted by stability class and wind speed before the comparison statistics are computed. This allows a meaningful comparison of average concentrations and high values for each data grouping. Results are displayed graphically and provide insight into the variation of model performance with both stability class and wind speed. The resulting comparisons suggest that the RAM model concentration estimates may have a bias towards underestimating concentrations during very unstable conditions and overestimating concentration values during very stable conditions. |
| PUB Date Free Form |
1983 |
| Category Codes |
13B; 68A; 91A |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/09 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
406249853 |
| Origin |
NTIS |
| Type |
CAT |
