Main Title |
Empirical studies of the relationship between emissions and visibility in the Southwest / |
Author |
Marians, Marilyn.
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Other Authors |
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CORP Author |
Technology Service Corp., Santa Fe, NM.;Environmental Protection Agency, Research Triangle Park, NC. Office of Air Quality Planning and Standards. |
Publisher |
U.S. Environmental Protection Agency, Office of Air, Noise and Radiation, Office of Air Quality Planning and Standards, |
Year Published |
1979 |
Report Number |
EPA 450/5-79-009; EPA-802815 |
Stock Number |
PB80-156136 |
OCLC Number |
45721531 |
Additional Subjects |
Air pollution ;
Visibility ;
Hydrocarbons ;
Nitrogen oxides ;
Sulfur oxides ;
Concentration(Composition) ;
Arizona ;
Colorado ;
Nevada ;
Utah ;
Southwest Region(United States)
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Internet Access |
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Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
EKBD |
EPA-450/5-79-009 |
|
Research Triangle Park Library/RTP, NC |
01/26/2001 |
ELBD ARCHIVE |
EPA 450-5-79-009 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
ERAD |
EPA 450/5-79-009 |
|
Region 9 Library/San Francisco,CA |
02/04/2013 |
ESAD |
EPA 450-5-79-009 |
|
Region 10 Library/Seattle,WA |
03/23/2010 |
NTIS |
PB80-156136 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
x, 108 p. : ill., maps ; 28 cm. |
Abstract |
Historical emission trends of SOx, NOx, and NMHC are determined year-by-year from 1948 to 1975 for four Southwestern states (Arizona, Colorado, Nevada, and Utah). Trends in visibility levels (medians and other percentiles) are documented for the period 1948-1976 at 12 airports in the Southwest. Two analyses are used to relate emission changes to variations in regional extinction levels. The first analysis examines the air quality changes associated with a 90% reduction of Southwestern SOx emissions during a nine-month copper strike and estimates the extinction produced by SOx emissions on various spatial scales. The second analysis involves regression studies relating historical extinction levels from 1948-1975. Because of limitations in the analytical methods, there is a high degree of uncertainty in many of the results. However, the studies do provide insights into the effects of aerosol precursor emissions on extinction at various distances from sources. In the case of mesoscale effects of SOx in the Southwest, quantitative coefficients are proposed which link emissions to regional extinction. |
Notes |
EPA project officers: John Bachmann, William E. Wilson, and Thomas G. Ellestad. Prepared by Technology Service Corporation. "September 1979." Interim report. Includes bibliographical references. "EPA-450/5-79-009." PB80-156136. |