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NARSTO Workshop on Innovative Methods for Emission Inventory Development and Evaluation University of Texas, Austin October 14-17, 2003 |
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Evaluating the Performance of a Comprehensive Regional Emissions Inventory Using Field Data
Cyril Durrenberger and David Allen
University of Texas at Austin,
Jim Price
Texas Commission on Environmental Quality
Data from the Texas Air Quality Study, conducted during the summer of 2000, have been used to evaluate emission inventories for southeast Texas. Other presentations in this meeting (if accepted) will report the details of performance evaluations for biogenic inventories, point source inventories, mobile source inventories, emissions from fires and emissions of secondary organic aerosol precursors.
Comparisons between modeling, based on current emission inventories, and field data suggest that current methods for estimating emissions of biogenics are reasonable, while emission inventories for point sources and mobile sources have significant problems in key emission categories. This presentation will provide an overview of the comparisons, focusing on the following questions:
1). Are the magnitudes of the emissions correct?
2). Are the emissions adequately and correctly speciated?
3). Are the emissions correctly distributed spatially? and
4). Are the emissions correctly distributed temporally?
This presentation will also describe the strengths and limitations of using field measurements to infer emission rates and the key uncertainties that need to be addressed to improve the inventories.