Main Title |
Aerosol characteristics and visibility / |
Author |
Waggoner, Alan P. ;
Charlson., Robert J.
|
Other Authors |
|
CORP Author |
Washington Univ., Seattle. Dept. of Civil Engineering.;Environmental Sciences Research Lab., Research Triangle Park, N.C. |
Publisher |
Environmental Sciences Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, |
Year Published |
1977 |
Report Number |
EPA-600/3-77-072; EPA-R-800665; PB269944 |
Stock Number |
PB-269 944 |
OCLC Number |
52414059 |
Subjects |
Aerosols ;
Atmospheric chemistry ;
Atmospheric transparency ;
Visibility
|
Additional Subjects |
Aerosols ;
Air pollution ;
Visibility ;
Particles ;
Optical properties ;
Light scattering ;
Nephelometers ;
Concentration(Composition) ;
Particle size distribution ;
Samplers ;
Design criteria ;
Performance evaluation ;
Gas analysis ;
Chemical analysis ;
Atmospheric attenuation ;
Atmospheric chemistry ;
Air pollution detection
|
Internet Access |
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
EJBD |
EPA 600-3-77-072 |
c.1 |
Headquarters Library/Washington,DC |
03/10/2014 |
EKBD |
EPA-600/3-77-072 |
|
Research Triangle Park Library/RTP, NC |
07/11/2003 |
ELBD ARCHIVE |
EPA 600-3-77-072 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
ESAD |
EPA 600-3-77-072 |
|
Region 10 Library/Seattle,WA |
03/23/2010 |
NTIS |
PB-269 944 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
viii, [39] p. : ill. ; 28 cm. |
Abstract |
This report summarizes progress in measuring the optical properties of aerosols and in relating aerosol characteristics to visibility reduction made in the author's laboratory during the period 1965-1971. An instrument, the integrating nephelometer, which measures the scattering component of extinction, b(sp), was developed and used in several field studies. Measured b(sp) and observer visibility have been shown to be highly correlated and to follow the Koschmieder relation. Measured b(sp) is highly correlated (0.95 in Los Angeles) with suspended particle volume in the 0.1 to 1.0 micrometer size range. A useful correlation (0.56 to 0.92 at various sites) has been found between b(sp) and particle mass as collected on a filter. Techniques have been developed to measure b(sp) as a function of relative humidity for ambient and model aerosols. Water, absorbed by hygroscopic aerosols, as H2SO4, and/or deliquescent aerosols, as (NH4)2SO4, make a substantial contribution to visibility reduction. Techniques were also developed to measure the absorption component of extinction, b(sp); to measure the forward/backward scattering ratio; and to determine b(sp) as a function of wavelength. |
Notes |
"EPA-600/3-77-072" "July 1977." Includes bibliographical references (p. 33-35). |