HR: 1340h
AN: A33D-1537    [Abstracts]
TI: Chemical Processing in a Polluted Forest Canopy: a Model Comparison of the Regional Atmospheric Chemistry Mechanism, Version 2 and SAPRC07
AU: * Goliff, W
EM: wendyg@dri.edu
AF: Desert Research Institute, 2215 Raggio Parkway, Reno, NV 89512, United States
AU: Stockwell, W R
EM: wstockwell@howard.edu
AF: Department of Chemistry, Howard University, 525 College Street, NW, Washington, DC 20059, United States
AU: Fuentes, J D
EM: jf6s@virginia.edu
AF: Department of Environmental Sciences, University of Virginia, 291 McCormick Road, Charlottesville, VA 22904, United States
AB: In this study, we present a comparison of modeled chemical processing in polluted forest canopies using the Regional Atmospheric Chemistry Mechanism, Version 2 and SAPRC07. The comparison involves a number of field studies, one, for example, was conducted at a forested site near Oak Ridge, TN during the summer of 1999. The sites were under the influence of nitrogen oxide and hydrocarbon emissions from suburban automobile traffic. Air chemistry measurements (e.g., ozone, NOx and VOC) and meteorological measurements were collected within and above the forest canopies. A comparison of the degree of chemical processing by HO and NO3 radicals and O3 for biogenic compounds, and the amount of HOx formation between the two mechanisms is presented.
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0317 Chemical kinetic and photochemical properties
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting