HR: 08:45h
AN: A51A-04 INVITED     [PDF]
TI: Emission Rates of PM Constituents from Highly Time-Resolved Ambient Concentration Measurements: A New Paradigm in Air Pollution Management
AU: * Ondov, J
EM: jondov@wam.umd.edu
AF: University of Maryland, Department of Chemistry and Biochemistry, College Park, MD 20742 United States
AU: Pancras, P
EM: patrick@wam.umd.edu
AF: University of Maryland, Department of Chemistry and Biochemistry, College Park, MD 20742 United States
AU: Park, S S
EM: sspark@wam.umd.edu
AF: University of Maryland, Department of Chemistry and Biochemistry, College Park, MD 20742 United States
AU: Poor, N
EM: npoor@hsc.usf.edu
AF: USF college of Public Health, 13201 Bruce B. Downs Blvd., Tampa, FL 33612 United States
AB: Highly-time resolved metals measurements were made in the Bay Regional Atmospheric Chemistry Experiment and at four other urban locations using the University of Maryland Semicontinuous Elements in Aerosol Sampler. Aerosol slurry samples were collected at 30-minute intervals, i.e., at periods short relative to changes in wind direction, and analyzed off-line by mutli-element graphite furnace Atomic Absorption Spectroscopy for up to 12 elements useful as markers of primary particle emissions of high-temperature combustion sources. At this resolution, the plumes of individual sources, including coal- and oil-fired power plants, and a battery recycling plant, were readily observed as excursions in time series profiles of the concentrations of the various marker elements. Over the scale of 40 km, wind and source angles are nearly identical when the former are relatively constant during the time required for plume transport. Herein, ambient data collected at the Sydney site were combined with available stack emission measurements of SO2, along with meteorological data in a pseudo deterministic least squares model in which ambient concentrations are reconclied with the products of emission rates and dispersion factors for known sources. The model encompasses horrizontal and vertical gaussian dispersion terms as constraints and is used to estimate estimate emission rates of the various species from the known sources. Ambient ground-level measurements made in the vicinity of the Sydney site will be presented along with some the model estimates of emission rates from various sources.
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0345 Pollution--urban and regional (0305)
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting