Assessment of Air Quality Model Predictions of Ozone Concentrations Characterized by Large Hourly Changes in Houston, Texas Public Deposited

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Last Modified
  • March 20, 2019
Creator
  • Olatosi, Adeola O.
    • Affiliation: Gillings School of Global Public Health, Department of Environmental Sciences and Engineering
Abstract
  • The Houston-Galveston-Brazoria (HGB) area has been shown to be affected by two types of ozone formation. The 'typical' ozone formation, common in most parts of Houston and other urban areas, depicted by a gradual rise in hourly ozone concentration. The other type of ozone formation is depicted by a rapid rise in ozone formation defined as either [greater than or equal to] 40 ppb/hr or [greater than or equal to] 60 ppb/2hr change in hourly ozone concentration. These rapid ozone formation or 'non- typical ozone formation' (NTOC) have been shown to affect attainment metric by as much as 10 ppb. We have evaluated the regulatory Air Quality Model's (AQM) ability to accurately simulate the observed rapid ozone formation peculiar to this region using the two major emission inventories and have compared it with observations from days that corresponded with the modeling period. Results show that the model lacks the ability to predict observed maximum one hour and two hour changes.
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  • In Copyright
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  • "... in partial fulfillment of the requirements for the degree of Master of Science in the Department of Environmental Science and Engineering."
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  • Vizuete, William
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  • Chapel Hill, NC
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  • Open access
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M326m288h?file=thumbnail Assessment of air quality model predictions of ozone concentrations characterized by large hourly changes in Houston, Texas. 2019-04-12 Public