OZONE TRENDS AND CHARACTERISTICS OF OZONE EPISODES IN CORPUS CHRISTI, TEXAS

摘要

Overall there seems to be an increasing trend in the 8-hour average ozone concentration and a decreasing trend in the 1-hour average ozone concentration in Corpus Christi. Ozone levels at CAMS04 seem to be very close to the 8-hour NAAQS and this is a certainly a matter of great concern. Abatement measures necessary to control the emissions of ozone precursors in Corpus Christi needs be continued so that ozone levels remain below the NAAQS. Weekdays are more polluted than weekends. Highest level of ozone is generally found during September. Winds from north and northeast during the morning hours and from the east during the afternoon hours dominate on high ozone days compared to south-southeasterly wind on low ozone days. A significant percentage of back trajectories come from the North and East directions suggesting possible contribution of ozone from those areas.