Record Display for the EPA National Library Catalog


Main Title Calculated actinic fluxes (290-700 nm) for air pollution photochemistry applications /
Author Peterson, James T.,
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, Meteorology and Assessment Division, For sale by the National Technical Information Service.
Year Published 1976
Report Number EPA-600/4-76-025
Stock Number PB-255 819
OCLC Number 02379367
ISBN pbk.
Subjects Aerosols ; Air--Pollution--United States ; Photochemistry ; Solar radiation--United States
Additional Subjects Air pollution ; Solar radiation ; Atmospheric models ; Aerosols ; Numerical analysis ; Mathematical models ; Ozone ; Reaction kinetics ; Concentration(Composition) ; Radiant flux density ; Dissociation ; Rayleigh scattering ; Solar spectrum ; Albedo ; Nitrogen dioxide ; Aldehydes ; Photochemistry ; Photochemical dissociation
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600-4-76-025 c.1-2 Headquarters Library/Washington,DC 04/11/2014
ELBD ARCHIVE EPA 600-4-76-025 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD  EPA 600-4-76-025 AWBERC Library/Cincinnati,OH 11/21/2003
ESAD  EPA 600-4-76-025 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-255 819 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation viii, 55 pages : illustrations ; 28 cm.
Calculations are presented of the actinic (spherically integrated) solar flux from 290 to 700 nm at solar zenith angles between 0 and 86 degrees. The calculated values are obtained by using a radiative transfer program (developed by Dave) that accounts for molecular scattering, ozone absorption, and aerosol scattering and absorption. Input data consists of aerosol size distribution, aerosol number and ozone concentrations as a function of height, aerosol index of refraction, and the following as a function of wavelength: ozone absorption coefficient, molecular scattering coefficient, solar constant, and surface reflectivity. The calculated actinic flux values are evaluated for their dependence on variations of surface reflectivity, aerosol amount, ozone amount and station elevation. The variation of the actinic flux with altitude above the surface is discussed with emphasis on the change through the lowest kilometer of the atmosphere. Finally, the flux values presented here are compared to those of Leighton (1961); the differences in the methodology and input data between the two studies are illustrated. These calculated actinic flux data are useful for estimating photodissociation rate constants for application to photochemical air pollution problems.
Tables. Includes appendices. "June 1976." Includes bibliographical references (pages 45-49).