Record Display for the EPA National Library Catalog


Main Title Dependence of nephelometer scattering coefficients on relative humidity : evolution of aerosol bursts /
Author Griffing, George W.
CORP Author Environmental Sciences Research Lab., Research Triangle Park, NC.
Publisher U.S. Environmental Protection Agency, Office of Research and Development, Health Effects Research Laboratory,
Year Published 1981
Report Number EPA-600/4-81-030
Stock Number PB81-198293
OCLC Number 703638359
Subjects Aerosols--Measurement. ; Hygrometry. ; Moisture meters.
Additional Subjects Nephelometers ; Humidity ; Aerosols ; Weather ; Light(Visible radiation) ; Scattering ; Solar radiation ; Gases ; Aerosol burst ; Anticyclonic weather ; NTISEPAORD
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EKBD  EPA-600/4-81-030 Research Triangle Park Library/RTP, NC 02/28/2011
NTIS  PB81-198293 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation vii, 29 p. : charts ; 28 cm.
Observations on the temporal dependence of the nephelometer scattering coefficient on relative humidity are presented and discussed for four different cases. For each case, the weather at the Research Triangle Park, North Carolina was dominated by an anticyclonic weather system. By taking simultaneous nephelometer scattering coefficient observation at two different relative humidities, it was possible to conclude that with nocturnal stable atmospheric conditions: In general, the scattering coefficient increases from sundown to sunup due to aerosol growth and an increasing trend of the aerosol number density: In general, the relatively rapid increase and subsequent decrease of the scattering coefficient during a 2 to 3 hour period after sunup is due to a relatively rapid aerosol growth and shrinkage. The latter behavior of the scattering coefficient was called an aerosol burst.
"March 1981." Includes bibliographical references (p.28-29) "EPA-600/4-81-030."