Seasonal and weekly pattern of ozone over the OTAG region
Conference
·
OSTI ID:679459
- Washington Univ., St. Louis, MO (United States). Center for Air Pollution Impact and Trend Analysis
Human activities follow a pronounced weekly and seasonal cycle which results in cyclic emissions of man-made ozone precursors. The results of this work confirm that April-September is the proper time window for the ozone season. About 95% of the OTAG-wide exceedances occur during this warm part of the year. This holds for both the 120 ppb and the proposed 80 ppb standard. The weekly emission cycle results in a weekly ozone cycle. Over the entire OTAG region, the 90th percentile ozone is reduced from 87 to 81 ppb from Friday to Sunday. The daily exceedances (>120 ppb) are reduced on Sundays to one third of the exceedances on Fridays. This analysis indicates that if the OTAG-wide weekday emissions would be reduced to the current weekend levels, then ozone exceedances would decline by at least factor of three.
- OSTI ID:
- 679459
- Report Number(s):
- CONF-980632--
- Country of Publication:
- United States
- Language:
- English
Similar Records
The AQA workgroup summary: Telling the OTAG ozone story with data
Spatial pattern of 1-hour and 8-hour daily maximum ozone over the OTAG region
A preliminary look at ambient NOx (oxides of nitrogen) concentration trends in the United States
Conference
·
Wed Dec 30 23:00:00 EST 1998
·
OSTI ID:361979
Spatial pattern of 1-hour and 8-hour daily maximum ozone over the OTAG region
Conference
·
Wed Dec 30 23:00:00 EST 1998
·
OSTI ID:361976
A preliminary look at ambient NOx (oxides of nitrogen) concentration trends in the United States
Conference
·
Tue Dec 30 23:00:00 EST 1997
·
OSTI ID:617794