Ozone production in the upper troposphere and the influence of aircraft during SONEX: Approach of NO(x)-saturated conditions

L. Jaeglé, D. J. Jacob, W. H. Brune, I. C. Faloona, D. Tan, Y. Kondo, G. W. Sachse, B. Anderson, G. L. Gregory, S. Vay, H. B. Singh, D. R. Blake, R. Shetter

Research output: Contribution to journalArticle

50 Scopus citations

Abstract

During October/November 1997, simultaneous observations of NO, HO2 and other species were obtained as part of the SONEX campaign in the upper troposphere. We use these observations, over the North Atlantic (40-60°N), to derive ozone production rates, P(O3), and to examine the relationship between P(O3) and the concentrations of NO(x) (= NO + NO2) and HO(x) (= OH + peroxy) radicals. A positive correlation is found between P(O3) and NO(x) over the entire data set, which reflects the association of elevated HO(x) with elevated NO(x) injected by deep convection and lightning. By filtering out this association we find that for NO(x)>70 pptv, P(O3) is nearly independent of NO(x), showing the approach of NO(x)-saturated conditions. Predicted doubling of aircraft emissions in the future will result in less than doubling of the aircraft contribution to ozone over the North Atlantic in the fall. Greater sensitivity to aircraft emissions would be expected in the summer.

Original languageEnglish (US)
Pages (from-to)3081-3084
Number of pages4
JournalGeophysical Research Letters
Volume26
Issue number20
DOIs
StatePublished - Oct 15 1999

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Jaeglé, L., Jacob, D. J., Brune, W. H., Faloona, I. C., Tan, D., Kondo, Y., Sachse, G. W., Anderson, B., Gregory, G. L., Vay, S., Singh, H. B., Blake, D. R., & Shetter, R. (1999). Ozone production in the upper troposphere and the influence of aircraft during SONEX: Approach of NO(x)-saturated conditions. Geophysical Research Letters, 26(20), 3081-3084. https://doi.org/10.1029/1999GL900451