TY - JOUR
T1 - Analysis of motor vehicle emissions during the Nashville/Middle Tennessee Ozone Study
AU - Harley, Robert A.
AU - McKeen, Stuart A.
AU - Pearson, James
AU - Rodgers, Michael O.
AU - Lonneman, William A.
PY - 2001/2/27
Y1 - 2001/2/27
N2 - On-road gasoline and diesel-powered vehicle emissions in Nashville, Tennessee, were characterized using fuel sales as a measure of vehicle activity, and emission factors derived from infrared remote sensing, ambient air concentration ratios, and roadway tunnel measurements. On-road vehicle emissions of carbon monoxide (CO), nonmethane hydrocarbons (NMHC), and oxides of nitrogen (NOx) on weekdays during summer 1995 were estimated to be 270 ± 60, 43 ± 13, and 53 ± 9 metric tons per day, respectively. Diesel engines were a minor source of CO and NMHC, but were responsible for ∼50% of NOx emissions from on-road vehicles. The Environmental Protection Agency's MOBILE 5B emission model predictions were similar to fuel-based estimates for all pollutants, except for NOx where the MOBILE model predicted a smaller contribution to total on-road vehicle emissions from diesel engines. Chemical composition profiles for hydrocarbon emissions were developed based on tunnel air and fuel samples collected in Nashville during summers 1995 and 1999. More than half of the tunnel NMHC mass was liquid fuel that escaped combustion; the remaining mass came from products of incomplete combustion such as ethane, acetylene, C2-C4 alkenes, and 1,3-butadiene. No major changes in the composition of vehicle-related NMHC emissions were observed between 1995 and 1999 in Nashville.
AB - On-road gasoline and diesel-powered vehicle emissions in Nashville, Tennessee, were characterized using fuel sales as a measure of vehicle activity, and emission factors derived from infrared remote sensing, ambient air concentration ratios, and roadway tunnel measurements. On-road vehicle emissions of carbon monoxide (CO), nonmethane hydrocarbons (NMHC), and oxides of nitrogen (NOx) on weekdays during summer 1995 were estimated to be 270 ± 60, 43 ± 13, and 53 ± 9 metric tons per day, respectively. Diesel engines were a minor source of CO and NMHC, but were responsible for ∼50% of NOx emissions from on-road vehicles. The Environmental Protection Agency's MOBILE 5B emission model predictions were similar to fuel-based estimates for all pollutants, except for NOx where the MOBILE model predicted a smaller contribution to total on-road vehicle emissions from diesel engines. Chemical composition profiles for hydrocarbon emissions were developed based on tunnel air and fuel samples collected in Nashville during summers 1995 and 1999. More than half of the tunnel NMHC mass was liquid fuel that escaped combustion; the remaining mass came from products of incomplete combustion such as ethane, acetylene, C2-C4 alkenes, and 1,3-butadiene. No major changes in the composition of vehicle-related NMHC emissions were observed between 1995 and 1999 in Nashville.
UR - http://www.scopus.com/inward/record.url?scp=0035086542&partnerID=8YFLogxK
U2 - 10.1029/2000JD900677
DO - 10.1029/2000JD900677
M3 - Article
AN - SCOPUS:0035086542
SN - 0148-0227
VL - 106
SP - 3559
EP - 3567
JO - Journal of Geophysical Research: Biogeosciences
JF - Journal of Geophysical Research: Biogeosciences
IS - D4
M1 - 2000JD900677
ER -