Skip to main content
eScholarship
Open Access Publications from the University of California

UC Davis

UC Davis Previously Published Works bannerUC Davis

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

  • Author(s): Jaeglé, L
  • Jacob, DJ
  • Brune, WH
  • Faloona, IC
  • Tan, D
  • Kondo, Y
  • Sachse, GW
  • Anderson, B
  • Gregory, GL
  • Vay, S
  • Singh, HB
  • Blake, DR
  • Shetter, R
  • et al.
Abstract

During October/November 1997, simultaneous observations of NO, HO 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(O ), and to examine the relationship between P(O ) and the concentrations of NO(x) (= NO + NO ) and HO(x) (= OH + peroxy) radicals. A positive correlation is found between P(O ) 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(O ) 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. 2 3 3 2 3 3

Many UC-authored scholarly publications are freely available on this site because of the UC's open access policies. Let us know how this access is important for you.

Main Content
Current View