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RECORD NUMBER: 144 OF 536

OLS Field Name OLS Field Data
Main Title Continued Research in Mesoscale Air Pollution Simulation Modeling. Volume 5. Refinements in Numerical Analysis, Transport, Chemistry, and Pollutant Removal.
Author Killus, J. P. ; Meyer, J. P. ; Durran, D. R. ; Anderson, G. E. ; Jerskey, T. N. ;
CORP Author Systems Applications, Inc., San Rafael, CA.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Year Published 1984
Report Number EPA-68-02-2216; EPA/600/3-84/095A;
Stock Number PB85-137362
Additional Subjects Air pollution ; Mathematical models ; Atmospheric models ; Computerized simulation ; Transport properties ; Chemistry ; Air pollution control ; Aerosols ; Concentration(Composition) ; Ozone ; Nitrogen dioxide ; Sulfur dioxide ; Airshed model ; Numerical solution
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB85-137362 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 238p
Abstract Two numerical integration methods identified as having features that provided significant improvements over the technique originally embedded in the Airshed Model have been evaluated. Of particular concern was the treatment of horizontal transport. In the evaluation of the schemes, the predictions resulting from the SHASTA method differed no more than about 20 percent from those generated using the original method. In addition, SHASTA posseses the better blend of computational speed and minimum error propagation. An objective analysis technique for obtaining a gridded, time-varying, fully three-dimensional wind field for the Airshed Model from available measurements has been developed. The technique accounts for urban heat island effects and should be directly applicable to relatively flat areas. A 42-step chemical kinetic mechanism for describing the chemical transformations of organics, NOx, O3, and SO2 and the production of sulfate, nitrate, and organic aerosols is presented. A unique feature of this mechanism is the explicit consideration given to the carbon bonds making up each organic molecule. An algorithm that relates the effective deposition velocity to the stability of the atmosphere and the type of surface has been implemented in the Airshed Model. Surface removal processes may significantly affect the concentrations of O3, NO2, and SO2.
Supplementary Notes See also PB-257 529, and PB85-137370. Portions of this document are not fully legible.
NTIS Title Notes Final rept. Oct 79-Jul 82.
PUB Date Free Form Dec 84
Category Codes 13B; 68A
NTIS Prices PC A11/MF A01
Primary Description 600/09
Document Type NT
Cataloging Source NTIS/MT
Control Number 507411640
Origin NTIS
Type CAT