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Seasonal transition from NOx‐ to hydrocarbon‐limited conditions for ozone production over the eastern United States in September
Open accessAbstract
Concentrations of O 3, CO, NO, total reactive nitrogen oxides (NO y), H 2 O 2, and HCHO were measured from September 4 to October 1, 1990, at a mountain ridge site in Shenandoah National Park, Virginia. The data show evidence for a transition from NO x‐limited to hydrocarbon‐limited conditions for O 3 production over the course of September. The transition is diagnosed by large decreases of the H 2 O 2/(NO y‐NO x) and HCHO/NO y concentration ratios, weakening of the correlation between O 3 and NO y‐ NO x concentrations, and decrease of the slope ΔO 3/Δ(NO y‐NO x). A high‐O 3 episode occurring in late September was associated with only 0.34 ppbv H 2 O 2, indicative of hydrocarbon‐limited conditions. A seasonal transition in photochemical regime over the eastern United States in September would be expected from theory; the production rate of odd hydrogen radicals decreases by a factor of 2 over the course of the month, due to decreasing UV radiation and humidity, allowing HNO 3 production to become the dominant sink for odd hydrogen in the boundary layer and resulting in hydrocarbon‐limited conditions for O 3 production. Seasonal decline of isoprene emission can greatly accentuate the transition.
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Citations
Cited by
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Self-citationLefohn, A. S., Malley, C. S., Smith, L., Wells, B., Hazucha, M., Simon, H., Naik, V., Mills, G., Schultz, M. G., Paoletti, E., et al. (2018) · Elementa: Science of the Anthropocene · doi:10.1525/elementa.279 · Cited by 457
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Metadata
- Authors
- Jacob, D. J., Horowitz, L. W., Munger, J. W., Heikes, B. G., Dickerson, R. R., Artz, R. S., & Keene, W. C.
- Venue
- Journal of Geophysical Research: Atmospheres
- Publisher
- American Geophysical Union (AGU)
- Published
- 1995-05-20
- Volume
- 100
- Issue
- D5
- Pages
- 9315-9324
- ISSN
- 0148-0227 (ISSN-L)
- OpenAlex
- W2058894048
- Cited by
- 174
- References
- 0
- FWCI
- 8.33
- Type
- journal article
- Language
- en
- Open access
- green
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- CoChat. (2026). Citation check: Seasonal transition from NOx‐ to hydrocarbon‐limited conditions for ozone production over the eastern United States in September. https://app.cochat.ai/papers/10.1029/94jd03125
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- Jacob, D. J., Horowitz, L. W., Munger, J. W., Heikes, B. G., Dickerson, R. R., Artz, R. S., & Keene, W. C. (1995). Seasonal transition from NOx‐ to hydrocarbon‐limited conditions for ozone production over the eastern United States in September. Journal of Geophysical Research: Atmospheres. https://doi.org/10.1029/94jd03125
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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