Effect of chemical kinetics uncertainties on calculated constituents in a tropospheric photochemical model

A. M. Thompson, R. W. Stewart

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Abstract

We have evaluated uncertainties in tropospheric concentrations calculated with a one-dimensional photochemical model, using a Monte Carlo technique to introduce random uncertainty into the model rate coefficients. The most critical reactions turn out to be the primary photodissociations of O3 and NO2, which initiate ozone destruction and formation, respectively. The reaction between OH and methane is critical, as is the rate of nitric acid formation, which removes both odd nitrogen (NOx) and odd hydrogen (HOx). Species-species correlations reveal anticorrelation between HOx and NOx and positive correlation between OH and peroxides, acids, and aldehydes. Several experimental strategies for optimizing the deduction of OH are described, including one based on measurement of the HO2 radical. -from Authors

Original languageEnglish (US)
Pages (from-to)13,089-13,108
JournalJournal of Geophysical Research
Volume96
Issue numberD7
DOIs
StatePublished - 1991

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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