Motor vehicles as sources of compounds important to tropospheric and stratospheric ozone

Technical Report · Fri Apr 01 04:00:00 EST 1988

OSTI ID:5003133

Black, F M

One of the most-rapidly growing human activities in the U.S. of importance to atmospheric ozone is the use of highway motor vehicles. Transportation sources are estimated to have been responsible for about 34% of 1985 U.S. anthropogenic hydrocarbon emissions, 70% of carbon monoxide emissions, 45% of nitrogen oxide emissions, 24% of nonaerosol chlorofluorocarbon emissions, and 14% of carbon dioxide emissions. Data are presented describing possible uninventoried transportation hydrocarbon emissions that could increase their estimated contribution to 45 - 50% of the anthropogenic total. Data is also presented suggesting motor vehicles to be relatively insignificant sources of anthropogenic nitrous oxide, but noting that these emissions are increased by the control technologies used to reduce hydrocarbon, carbon monoxide, and nitrogen oxides emissions. The sensitivity of motor-vehicle emission rates and compositions to such operating variables as ambient temperature, altitude, and average speed is discussed.

• Research Organization: Environmental Protection Agency, Research Triangle Park, NC (USA). Atmospheric Sciences Research Lab.
• OSTI ID: 5003133
• Report Number(s): PB-88-195219/XAB; EPA-600/D-88/067
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330700* -- Advanced Propulsion Systems-- Emission Control
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
EARTH ATMOSPHERE
EXHAUST GASES
FLUIDS
GASEOUS WASTES
GASES
HYDROCARBONS
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
OZONE
POLLUTION
PRODUCTION
STRATOSPHERE
TROPOSPHERE
WASTES