HR: 1340h
AN: A23C-1479    [Abstracts]
TI: Evaluation of Bottom-Up Mobile Emissions Inventories in the Upper Midwest
AU: * Spak, S
EM: snspak@wisc.edu
AF: Center for Sustainability and the Global Environment, University of Wisconsin-Madison, 1710 University Avenue, Madison, WI 53726, United States
AU: Holloway, T
EM: taholloway@wisc.edu
AF: Center for Sustainability and the Global Environment, University of Wisconsin-Madison, 1710 University Avenue, Madison, WI 53726, United States
AU: Mednick, A
EM: mednick@wisc.edu
AF: Department of Urban and Regional Planning, University of Wisconsin-Madison, 925 Bascom Mall, Madison, WI 53706, United States
AU: Stone, B
EM: Brian.Stone@coa.gatech.edu
AF: City and Regional Planning Program, Georgia Institute of Technology, 247 4th Street, Atlanta, GA 30332-0155, United States
AB: The effects of mobile emissions inventories on regional ozone, fine particulate matter, nitrate, and secondary organic aerosol are investigated using the Community Multiscale Air Quality Model (CMAQ) and a bottom-up regional inventory. This inventory, developed for an EPA STAR-funded study, Projecting the Impact of Land Use and Transportation on Future Air Quality in the Upper Midwestern United States (PLUTO), use the Nationwide Personal Transportation Survey transferability framework's demographic and vehicle activity modeling to estimate vehicle trips and miles of travel (VMT) at the census tract level in response to four census variables: income, vehicle ownership, employment rate, and density. Once grouped into demographically homogenous clusters, average daily household vehicle travel rates are derived from the national travel survey respondents captured in each cluster and used to estimate tract level vehicle travel activity. Regional VMT and emissions estimates are compared with the US EPA's 2002 National Emissions Inventory onroad mobile inventory, developed with the National Mobile Inventory Model, which clusters by county. CMAQ is run in a 2002 annual simulation at 36 km x 36 km resolution over Illinois, Indiana, Michigan, Minnesota, Ohio, and Wisconsin. Impacts of mobile emissions inventories on air quality model performance are established through comparison with surface observations from AQS and STN networks. In evaluating mobile emissions inventories, this study provides insight into the sensitivity of simulated air quality to a range of mobile emissions estimates, and allows for an attribution of CMAQ error to uncertainty in mobile emissions.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 1632 Land cover change
DE: 3355 Regional modeling
DE: 6334 Regional planning (1880)
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting