Record Display for the EPA National Library Catalog


Main Title Calculation of selected photolytic rate constants over a diurnal range : a computer algorithm /
Author Schere, Kenneth L. ; Demerjian., Kenneth L.
Other Authors
Author Title of a Work
Schere, Kenneth L.
Demerjian, Kenneth L.
United States.
CORP Author Environmental Sciences Research Lab., Research Triangle Park, N.C. Meteorology and Assessment Div.
Publisher U.S. Environmental Protection Agency, Office of Research and Development, Environmental Sciences Research Laboratory,
Year Published 1977
Report Number EPA-600/4-77-015
Stock Number PB-266 739
OCLC Number 52757938
Additional Subjects Reaction kinetics ; Air pollution ; Atmospheric modeling ; Photochemical reactions ; Mathematical models ; Computerized simulation ; Computer programs ; Diurnal variations ; Smog ; Nitrogen dioxide ; Ozone ; Nitrous acid ; Nitric acid ; Formaldehyde ; Hydrogen peroxide ; Acetaldehyde ; Fortran ; Aerosols ; Algorithms ; Rate constants
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600-4-77-015 Headquarters Library/Washington,DC 03/26/2014
EKBD  EPA-600/4-77-015 Research Triangle Park Library/RTP, NC 08/01/2003
ELBD ARCHIVE EPA 600-4-77-015 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ESAD  EPA 600-4-77-015 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-266 739 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation viii, 63 p. : ill. ; 28 cm.
A computer program has been created and is described herein which employs the theoretical formulation of the photolytic rate constant to calculate these rate constants for specific chemical species over a diurnal time period in clear-sky conditions. A user of the program must specify the date, time and location for which the rate constants are desired. With this information and specific data on zenith angles, solar irradiance, and species characteristics of absorption cross-sections and primary quantum yields, which are provided in the program package, the computer program generates a diurnal range of photolytic rate constants for each species. The species included are NO2, O3, HONO, HONO2, H2CO, CH3CHO, and H2O2. The appendices to this report contain program and data listings as well as a User's Guide to program operation. The program-generated photolytic rate constants for NO2 are compared to direct measurements of this quantity as taken at Research Triangle Park, N.C. during April 1975. The two methods are generally in close agreement after the theoretically computed rate constants are scaled by a simplistic method for the compensation of solar radiation attention by clouds.
"March 1977." "EPA-600/4-77-015."