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Main Title Empirical studies of the relationship between emissions and visibility in the Southwest /
Author Marians, Marilyn.
Other Authors
Author Title of a Work
Trijonis, John.
Bachmann, John.
Wilson, William E.
Ellestad, Thomas G.
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)
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EIAD  EPA-450/5-79-009 Region 2 Library/New York,NY 07/12/2002 DISPERSAL
EJBD ARCHIVE EPA 450-5-79-009 Headquarters Library/Washington,DC 06/24/2014
EKBD  EPA-450/5-79-009 Research Triangle Park Library/RTP, NC 01/26/2001
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.
Place Published Research Triangle Park, N.C.
Corporate Au Added Ent United States. Environmental Protection Agency. Office of Air Quality Planning and Standards.; Technology Service Corporation.
PUB Date Free Form 1979
NTIS Prices PC A06/MF A01
BIB Level m
Cataloging Source OCLC/T
OCLC Time Stamp 20130131192042
Language eng
Origin OCLC
OCLC Rec Leader 01425cam 2200361Ka 45020