Nitric oxide in the equatorial Pacific boundary layer: SAGA 3 measurements

A. L. Torres, A. M. Thompson

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Overall, NO mixing ratios for measurements made beween 0800 and 1600 LT averaged 2.9 ± 0.1 parts per trillion by volume (pptv), where the uncertainties represent 95% confidence limits in the mean. Concentrations were generally highest near the equator: NO mixing ratios obtained between 0800 and 1600 LT averaged 4.0 ± 0.2 pptv in the 5°S-5°N latitude band and 2.1 ± 0.2 pptv in the 5°-15° bands north and south of the equator. In the equatorial band the average diurnal behavior was a steady rise in NO from early morning until local noon, reaching a peak of about 4.5 pptv that remained until late afternoon before beginning a rapid decline. In the 5°-15° bands north and south of the equator the average diurnal curve for NO was flat (within experimental uncertainties) at about 2 pptv from 0800 to 1600. The NO and O3 measured on SAGA 3 correspond to a loss rate of ozone of ~1 parts per billion by volume (ppbv) O3/day in a region where mean surface O3 is 10 ppbv. -from Authors

Original languageEnglish (US)
Pages (from-to)16,949-16,954
JournalJournal of Geophysical Research
Issue numberD9
StatePublished - 1993

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology


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