| Main Title |
Implementation of an Urban Canopy Parameterization in MM5 for Meso-Gamma-Scale Air Quality Modeling Applications. |
| Author |
Otte, T. L. ;
Lacser, A. ;
|
| CORP Author |
Environmental Protection Agency, Research Triangle Park, NC. National Exposure Research Lab. |
| Publisher |
2003 |
| Year Published |
2003 |
| Report Number |
EPA/600/A-03/041; |
| Stock Number |
PB2004-101301 |
| Additional Subjects |
Atmospheric models ;
Urban areas ;
Air pollution control ;
Air quality ;
Parameterization ;
Kinetic energy ;
Pollutants ;
Computerized simulation ;
Turbulence ;
Land use ;
Morphology ;
Implementation ;
Urban canopy ;
Mesoscale Model 5(MM5) ;
Community Multiscale Air Quality(CMAQ)
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB2004-101301 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
8p |
| Abstract |
The United States Environmental Protection Agency (U.S. EPA) is extending its Models-3/Community Air Quality (CMAQ) Modeling System to provide detailed gridded air quality concentration fields and sub-grid variability characterization at neighborhood scales and in urban areas. CMAQ is an advanced air quality modeling system that embodies a 'one-atmosphere,' multiple-pollutant philosophy. The meteorological model used with CMAQ in this application is the Pennsylvania State University/National Center for Atmospheric Research (PSU/NCAR) Mesoscale Model (MM5). For fine-scale urban simulations (approximately 1-km grid spacing), MM5 is being modified to include an urban canopy parameterization that accounts for the drag exerted by the urban structures on the flow, the enhancement of turbulent kinetic energy especially near the top of the buildings, and the energy budget at the street and roof levels. This refinement is targeted to provide CMAQ with the means to capture the details of the pollutant spatial distributions at these scales. One of the goals of this research is to demonstrate the capability of MM5 to simulate the effects of urban areas at the meso-gamma scale. Preliminary experiments with the 'off-the-shelf' MM5 were performed with various physics options in the coarser domains (e.g., 36, 12, and 4 km) to provide a baseline for comparing with the 1.33-km simulations. This paper will show sensitivities of the predicted meteorological variables to grid sizes and illustrate the utility of the urban canopy parameterization through comparisons with measurements. Ultimately, the urban canopy parameterization will be expanded to use more detailed land use databases than currently available in MM5, and it will include better-resolved urban morphology to identify urban terrain zones. |
| Supplementary Notes |
See also PB2004-101310 and PB2004-101312. |
| Availability Notes |
Also available on CD-ROM. Product reproduced from digital image. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
| Category Codes |
55; 68A |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/09 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
009700030 |
| Origin |
NTIS |
| Type |
CAT |
