Spatial pattern of 1-hour and 8-hour daily maximum ozone over the OTAG region
- Washington Univ., St. Louis, MO (United States). Center for Air Pollution Impact and Trend Analysis
The spatial pattern of daily 1-hour maximum summertime ozone over the OTAG region is elevated in the vicinity of populated metropolitan centers. A broad area of elevated ozone is also present over the industrial states from Illinois through Pennsylvania. The urban impact is virtually undetectable during clean days (10 percentile of the ozone concentration). However, the urban influence during high ozone levels (90th percentiles) is very pronounced, but confined to the vicinity (few hundred miles) of metropolitan areas. The overall shape of the exceedance pattern for 8-hour and 1-hour metric is rather similar. Switching from the 1-hour to the 8-hour exceedance metric yields some increase of the relative (to 1-hour) exceedances over the industrial Midwestern states from Illinois to Pennsylvania and a decrease of relative exceedances around Houston and New York City where the concentrations are highly variable.
- OSTI ID:
- 361976
- Report Number(s):
- CONF-980632--
- Country of Publication:
- United States
- Language:
- English
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