O3 and NO(y) relationships at a rural site

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Journal of Geophysical Research

OSTI ID:57449

Olszyna, K J; Bailey, E M; Simonaitis, R; Meagher, J F ^[1]

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1. Tennessee Valley Authority, Muscle Shoals, AL (United States)

Measurements of O3, NO, NO2, peroxyacetyl nitrate (PAN), HNO3, and NO(y) were made during a 6-week period in the summer of 1991 in Giles County, Tennessee. These data were analyzed to determine the factors controlling the relationship between O3 and NO(y) at this rural site. A strong association was observed between the O3 and NO(x) oxidation product (NO(z) = NO(y)) levels. The higher O3 levels were associated with air masses impacted by higher NO(x) emissions that had been photochemically processed. An analysis of the data indicates that the ultimate O3 production is about 10 molecules of O3 produced for each molecule of NO(x) emitted. The analysis results also suggest that O3 net production continues until about 70% of the NO(x) has been converted into NO(z). The PAN/HNO3 ratios observed suggest that the air masses in Giles County are composed of higher volatile organic carbon/NO(x) ratios than the air masses observed at other rural sites in eastern North America. A comparison of the data analysis results to model simulations and smog chamber experiments suggests that most of the time, Giles County is in an NO(x)-limited regime for O3 production.

• OSTI ID: 57449
• Journal Information: Journal of Geophysical Research, Journal Name: Journal of Geophysical Research Journal Issue: D7 Vol. 99; ISSN JGREA2; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
AIR QUALITY
EARTH ATMOSPHERE
MONITORING
NITROGEN OXIDES
OZONE
PHOTOCHEMICAL REACTIONS
RURAL AREAS