Authors
Andrew P Grieshop, Eric M Lipsky, Natalie J Pekney, Satoshi Takahama, Allen L Robinson
Publication date
2006/1/1
Journal
Atmospheric Environment
Volume
40
Pages
287-298
Publisher
Pergamon
Description
In-use, fuel-based motor vehicle emission factors were determined using measurements made in a highway tunnel in Pittsburgh, Pennsylvania. Concentrations of PM2.5 mass, CO, CO2, and NOx were measured continuously. Filter-based measurements included PM2.5 mass, organic and elemental carbon (OC and EC), inorganic ions and metals. Fuel-based emission factors for each pollutant were calculated using a fuel-carbon balance. The weekday traffic volume and fleet composition varied in a consistent diurnal pattern with the estimated fraction of fuel consumed by heavy-duty diesel vehicle (HDDV) traffic ranging from 11% to 36%. The emission rate of most species showed a significant dependence on sample period. NOx, PM2.5, EC and OC emission factors were significantly larger during the early morning, truck-dominated period. Emissions of particulate metals associated with brake wear (Cu, Sb, Ba and …
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Scholar articles
AP Grieshop, EM Lipsky, NJ Pekney, S Takahama… - Atmospheric Environment, 2006