The relationship between rotational wind patterns and ozone exceedances in Houston, Texas Public Deposited

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  • March 22, 2019
  • Christoph, Elizabeth Edith
    • Affiliation: Gillings School of Global Public Health, Department of Environmental Sciences and Engineering
  • The Houston-Galveston-Beaumont (HGB) area in southeast Texas has been designated as a non-attainment area for 0.08 ppm 8-hour ozone by the EPA. High ozone episodes in Houston have previously been related to circular wind patterns accompanying land-sea breezes. The direction the wind blew from during the day was divided into quadrants, and the number of quadrants the wind blew from was summed daily. The number of quadrants the wind blew from was highly correlated with ozone exceedances. This study found that 95% of all ozone exceedances occur on 3-quadrant or 4-quadrant days, but on 90% of 3-quadrant and 4-quadrant days, there were no ozone exceedances. The average wind speed and temperature of a day vary with the quadrant class of the day, but not significantly enough to dominate ozone production. This method is helpful in predicting high ozone, and selecting days for attainment demonstrations.
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  • In Copyright
  • Vizuete, William
Degree granting institution
  • University of North Carolina at Chapel Hill
  • Open access

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