Cloud Forming Potential of Aerosol from Light-Duty Gasoline Direct Injection Vehicles

This project investigates the water-uptake of aerosols from gasoline direct injection (GDI) vehicles using a mobile environmental chamber that has been designed and constructed to characterize secondary emissions, or emissions that have undergone atmospheric transformations. The cloud condensation nuclei (CCN) ability of aged aerosols are compared to fresh measurements. The fresh and aged emissions are characterized for CCN properties for a total of six light-duty GDI vehicles. Testing includes GDI vehicles with low and high mileage, vehicles operated with ethanol blends, and vehicles retrofitted with prototype gasoline particle filters. The results of this study have important implications for the assessment of cloud-aerosol indirect effects of salt-seeded and black carbonaceous aerosol cores. The researchers concluded that in aerosol emissions from new generation GDI vehicles will have significant influence on the impacts of the secondary and primary aerosols on climate.

    Language

    • English

    Project

    • Status: Completed
    • Funding: $104324
    • Contract Numbers:

      DTRT13-G-UTC13

    • Sponsor Organizations:

      Office of the Assistant Secretary for Research and Technology

      University Transportation Centers Program
      Department of Transportation
      Washington, DC  United States  20590

      National Center for Sustainable Transportation

      University of California, Davis
      Davis, CA  United States 
    • Managing Organizations:

      National Center for Sustainable Transportation

      University of California, Davis
      Davis, CA  United States 
    • Project Managers:

      Iacobucci, Lauren

    • Performing Organizations:

      University of California, Riverside

      Center for Environmental Research and Technology
      900 University Avenue
      Riverside, CA  United States  92521-0425

      National Center for Sustainable Transportation

      University of California, Davis
      Davis, CA  United States 
    • Principal Investigators:

      Karavalakis, Georgios

    • Start Date: 20150701
    • Expected Completion Date: 20170401
    • Actual Completion Date: 20171201
    • USDOT Program: University Transportation Centers

    Subject/Index Terms

    Filing Info

    • Accession Number: 01578275
    • Record Type: Research project
    • Source Agency: National Center for Sustainable Transportation
    • Contract Numbers: DTRT13-G-UTC13
    • Files: UTC, RiP
    • Created Date: Oct 15 2015 5:23PM