Record Display for the EPA National Library Catalog


Main Title Effects of atmospheric aerosols on infrared irradiance at the earth's surface in a nonurban environment /
Author Riches, M. R., ; Riches, Michael R.
Other Authors
Author Title of a Work
Peterson, James T.,
Flowers, Edwin C.,
CORP Author North Carolina State Univ., Raleigh. Dept. of Geosciences.;National Environmental Research Center, Research Triangle Park, N.C. Meteorology Lab.
Publisher Environmental Protection Agency, Office of Research and Development ;
Year Published 1975
Report Number EPA-650/4-75-017; EPA-ROAP-26AAS
Stock Number PB-243 635
OCLC Number 01891446
Subjects Aerosols ; Infrared radiation
Additional Subjects Air pollution ; Aerosols ; Atmospheric attenuation ; Solar radiation ; Turbidity ; Light transmission ; Temperature ; Humidity ; Radiometers ; Detectors ; Infrared radiation ; Least squares method ; Regression analysis ; Earth surface ; Air pollution detection ; Atmospheric transmissivity
Internet Access
Description Access URL
Local Library Info
Library Local Subject Local Note
EKB Errata ([1] leaf) laid in.
Library Call Number Additional Info Location Last
EJBD  EPA 650-4-75-017 c.1 Headquarters Library/Washington,DC 05/07/2013
EKBD  EPA-650/4-75-017 Research Triangle Park Library/RTP, NC 09/11/2012
ELBD ARCHIVE EPA 650-4-75-017 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD  EPA 650-4-75-017 AWBERC Library/Cincinnati,OH 06/22/2006
NTIS  PB-243 635 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation vi, 36 pages ; 27 cm
This report describes a study designed to measure hemispheric infrared downward-directed irradiance at the earth's surface and ambient aerosol concentrations at Research Triangle Park, North Carolina. A Funk-type net radiometer (with a blackened cavity on the underside) was used to measure the incident all-wave energy. From the value obtained, the observed solar radiation was subtracted to determine the infrared component. The expected incident infrared irradiance was calculated from prevailing atmospheric conditions. Six methods were used for these calculations: four empirical equations based on surface conditions, the Yamamoto chart, and a radiative transfer program using vertical profiles of temperature and moisture. The observed-minus-calculated downwelling irradiances were then compared to concurrent measurements of turbidity obtained with a Volz sunphotometer, nephelometer-indicated atmospheric extinction coefficient, and a relative humidity. These measurements were analyzed by least-squares regression to determine the extent to which incident hemispheric infrared radiation is affected by varying amounts of atmospheric aerosols and relative humidity.
"Prepared for Environmental Protection Agency, Office of Research and Development." "Program Element No. lAA009; ROAP No. 26AAS." "May 1975." Includes bibliographical references (pages 32-35).