| Main Title |
Computational Aspects of the Air Quality Forecasting Version of CMAQ (Community Multiscale Air Quality) (CMAQ-F). |
| Author |
Wong, D. C. ;
Young, J. O. ;
|
| CORP Author |
Environmental Protection Agency, Research Triangle Park, NC. Office of Air Quality Planning and Standards. ;Lockheed Martin, Research Triangle Park, NC. |
| Publisher |
2004 |
| Year Published |
2004 |
| Report Number |
EPA/600/A-04/106 ;NERL-RTP-AMD-04-081; |
| Stock Number |
PB2005-101222 |
| Additional Subjects |
Computations ;
Air quality ;
Input output processing ;
Forecasting ;
Computer hardware ;
Parallel processing ;
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB2005-101222 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
one CD-ROM contains 4 page document |
| Abstract |
The air quality forecast version of the Community Modeling Air Quality (CMAQ) model (CMAQ-F) was developed from the public release version of CMAQ and is running operationally at the National Weather Service's National Centers for Environmental Prediction (NCEP). Most of the modifications to CMAQ focus on tailoring the model's performance to the operational hardware and the parallel computing environment at NCEP and effectively managing the parallel input and output (I/O) processes to achieve scalability. This has been accomplished by asynchronously overlapping computation with I/O writing to disk (WTD) by a dedicated processor. In this paper, we describe two different ways of placing the WTD processor. Benchmark results with regards to the WTD processor placement and an extension to more than one WTD processor are presented. In addition, a benchmark comparison between the I/O implementation in the CMAQ-F and the community version of CMAQ is provided. |
| Supplementary Notes |
This document is color dependent and/or in landscape layout. It is currently available on CD-ROM and paper only. CD-ROM contains a 4 page document. Prepared in cooperation with Lockheed Martin, Research Triangle Park, NC. |
| Availability Notes |
Available on CD-ROM or in paper copy. 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 |
68A; 62A |
| NTIS Prices |
AV$25.00 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
001800990 |
| Origin |
NTIS |
| Type |
CAT |
