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Project Number:
 
12-018
Title:
 
The Effects of Uncertainties in Fire Emissions Estimates on Predictions of Texas Air Quality
Lead PI:
 
Elena McDonald-Buller
Institution(s) Represented:
 
The University of Texas at Austin - Elena McDonald-Buller, ENVIRON International - Chris Emery
AQRP Project Manager:
 
Dave Sullivan
TCEQ Project Liaison:
 
Clint Harper
Awarded Amount:
 
$106,970.00

Abstract
The Effects of Uncertainties in Fire Emissions Estimates on Predictions of Texas Air Quality
 
Wildland fires and open burning can be substantial sources of nitrogen oxides (NOx), carbon monoxide (CO), and non-methane hydrocarbons (NMHCs), which are precursors to ozone formation, as well as particulate matter (PM), sulfur dioxide (SO2), and ammonia (NH3). Fire emissions are often transported over long distances and can contribute to exceedances of air quality standards at local and regional levels. Achieving attainment with the National Ambient Air Quality Standards (NAAQS) for ozone has been the primary focus of State Implementation Plans (SIPs) for Texas. Accurate characterization of fire events is necessary for understanding their influence on measured ambient concentrations, for providing a weight of evidence for exceptional event exclusions if necessary, and for conducting air quality modeling for planning and attainment demonstrations. In addition, if more stringent federal standards for ozone are considered in the future, emissions of its precursors from regional sources, such as fires in the Western U.S., Mexico, and Central America, that can contribute to background concentrations will become increasingly important for understanding the relative effectiveness of local and regional emissions control programs. This project examines the effects of uncertainties in fire emissions estimates on modeled ozone and particulate matter concentrations in Texas using the Fire INventory from NCAR (FINN) and the Comprehensive Air Quality Model with extensions (CAMx).




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