Upper tropospheric ozone production following mesoscale convection during STEP/EMEX

K. E. Pickering, A. M. Thompson, Tao Wei-Kuo Tao, T. L. Kucsera

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51 Scopus citations

Abstract

Model simulations of the EMEX 9 convective system indicate lower tropospheric air relatively rich in CO and low in NOx exiting in cloud outflow, slightly depressing the rate of O3 formation in the middle and upper troposphere. Other convective complexes, 800-900 km upstream, caused even greater perturbations to measured profiles of CO, NOx, O3, and H2O and implied a 15-20% reduction in the rate of O3 production from 14.5 to 17 km. The greatest factor affecting O3 formation in the upper troposphere in the STEP/EMEX flight might have been lightning-produced NOx. We estimate that O3 production from 12 to 17 km is 2-3 times more rapid than it would be with no lightning. Earlier in the convective season, the chemical consequences of a single episode might have been more substantial. -from Authors

Original languageEnglish (US)
Pages (from-to)8737-8749
Number of pages13
JournalJournal of Geophysical Research
Volume98
Issue numberD5
DOIs
StatePublished - Jan 1 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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