High ozone events and attainment demonstrations in Houston, Texas Public Deposited
- Last Modified
- March 20, 2019
- Creator
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Couzo, Evan Andrew
- Affiliation: Gillings School of Global Public Health, Department of Environmental Sciences and Engineering
- Abstract
- The Houston-Galveston-Brazoria area has had multiple decades of persistent high ozone (O3) values. We have analyzed ten years of ground-level measurements at 25 monitors in Houston and found that peak 1-h O3 concentrations were often associated with large hourly O3 increases. A non-typical O3 change (NTOC) - defined here as an increase of at least 40 ppb/hr or 60 ppb/2hrs - was measured 25% of the time when concentrations recorded at a monitor exceeded the 8-h O3 standard. CAMx model simulations were found to be limited in their ability to simulate NTOCs, under predicted maximum observed rates of O3 increases by more than 50 ppb/hr, and had difficulty simulating spatially isolated, high O3 events measured at monitors that routinely violate the 8-h O3 standard. Our results suggest that this modeling system will be unable to guide the selection of effective control strategies required to meet a more stringent federal 8-h O3 standard.
- Date of publication
- August 2010
- DOI
- Resource type
- Rights statement
- In Copyright
- Note
- "... in partial fulfillment of the requirements for the degree of Master of Science in the Environmental Sciences and Engineering."
- Advisor
- Vizuete, William
- Language
- Publisher
- Place of publication
- Chapel Hill, NC
- Access
- Open access
- Parents:
This work has no parents.
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High ozone events and attainment demonstrations in Houston, Texas | 2019-04-09 | Public |
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