Grantee Research Project Results
2010 Progress Report: Evaluation of Mobile Source Emissions and Trends Using Detailed Chemical and Physical Measurements
EPA Grant Number: R834553Title: Evaluation of Mobile Source Emissions and Trends Using Detailed Chemical and Physical Measurements
Investigators: Harley, Robert A. , Goldstein, Allen H. , Wood, Ezra
Current Investigators: Harley, Robert A. , Goldstein, Allen H.
Institution: University of California - Berkeley , Aerodyne Research Inc.
Current Institution: University of California - Berkeley
EPA Project Officer: Chung, Serena
Project Period: April 1, 2010 through March 31, 2014
Project Period Covered by this Report: April 1, 2010 through March 31,2011
Project Amount: $500,000
RFA: Novel Approaches to Improving Air Pollution Emissions Information (2009) RFA Text | Recipients Lists
Research Category: Particulate Matter , Climate Change , Air
Objective:
The overall objective is to evaluate mobile source emissions and trends over time. Both gasoline and diesel engine emissions will be measured, and there will be special emphasis on characterizing emission factor distributions for pollutants emitted by heavy-duty diesel trucks. Also, exhaust particulate emissions will be characterized in much greater detail than has been reported previously. This research includes as a major element a 2010 field study to measure current on-road diesel and gasoline vehicle emission rates and exhaust composition profiles, featuring new instrumentation for enhanced characterization of emission factor distributions.
Progress Summary:
Field measurements of motor vehicle emissions were conducted during summer 2010 at the Caldecott tunnel in the San Francisco Bay area in California. Vehicle emissions from traffic driving uphill on a 4% grade were measured in two separate tunnel tubes: one set of lanes included a mix of light- and heavy-duty vehicles, and additional measurements were made in a separate bore where heavy-duty trucks were not allowed. Detailed characterization of both gas- and particle-phase emissions from vehicles was done in this study. Some measurements were at high time resolution (1 Hz), such that exhaust emission plumes associated with individual heavy-duty trucks could be analyzed.
Future Activities:
Further laboratory and data analysis; reporting of results.
Journal Articles:
No journal articles submitted with this report: View all 19 publications for this projectSupplemental Keywords:
gasoline, diesel, nitrogen oxides, particulate matter, carbon monoxide, formaldehyde, nitrogen dioxide, organic carbon speciation, black carbon, aerosol mass spectrometer, vehicle emissionsProgress and Final Reports:
Original AbstractThe perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.