||National and regional trends in VOC and NOx emissions from 1900 to 1987 /
Gschwandtner, Gerhard. ;
Husar, R. B. ;
Mobley, J. D.
||Pechan (E.H.) and Associates, Inc., Durham, NC. ;Washington Univ., St. Louis, MO.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
|| U.S. Environmental Protection Agency, Office of Research and Development, Air and Energy Engineering Research Laboratory,
||EPA/600/D-89/186; AEERL-P-555; EPA-68-02-4271
Nitrogen oxides ;
United States ;
Air pollution ;
Exhaust emissions ;
Combustion products ;
Industrial wastes ;
Waste disposal ;
Spatial distribution ;
National government ;
Volatile organic compounds ;
Emission inventories ;
Atmospheric chemistry ;
Regional analysis ;
||Some EPA libraries have a fiche copy filed under the call number shown.
||14 pages : illustrations ; 28 cm
The paper gives estimates of historic emissions of VOC and NOx for each state of the contiguous U.S. The emissions were estimated for anthropogenic source categories which included transportation sources, external combustion sources, industrial processes, solid waste disposal, and miscellaneous other sources. From 1900 to the present, NOx emissions have increased steadily throughout the U.S. VOC emissions have historically been higher but, in recent years, the total emissions are nearly the same as for NOx. The reasons for these changes and source category contributions are presented. As a result of these changes, the ratio of VOC/NOx has decreased from 5.1 to 1.2 on a national basis from 1900 to 1985, and from about 20 to less than 2 in certain states. The ratio of VOC/NOx emissions is important in modeling photochemical atmospheric reactions, especially ozone. The paper presents a basis for understanding the temporal and spatial emissions trends.
"Contract no. 68-02-4271." "EPA/600/D-89/186." Includes bibliographical references. "Presented at APCA meeting, Anaheim, CA., 6/25-30, 1989." "J. David Mobley, project officer." Microfiche.