Characteristics of the NO-NO(2)-O(3) system in different chemical regimes during the MIRAGE-Mex field campaign. Shon, Z., -., Madronich, S., Song, S., -., Flocke, F., M., Knapp, D., J., Anderson, R., S., Shetter, R., E., Cantrell, C., A., Hall, S., R., & Tie, X. Atmospheric Chemistry and Physics, 8(23):7153-7164, 2008.
Characteristics of the NO-NO(2)-O(3) system in different chemical regimes during the MIRAGE-Mex field campaign [pdf]Paper  abstract   bibtex   
The NO-NO(2) system was analyzed in different chemical regimes/air masses based on observations of reactive nitrogen species and peroxy radicals made during the intensive field campaign MIRAGE-Mex (4 to 29 March 2006). The air masses were categorized into 5 groups based on combinations of macroscopic observations, geographical location, meteorological parameters, models, and observations of trace gases: boundary layer (labeled as ``BL''), biomass burning (''BB''), free troposphere (continental, ``FTCO'' and marine, ``FTMA''), and Tula industrial complex (''TIC''). In general, NO(2)/NO ratios in different air masses are near photostationary state. Analysis of this ratio can be useful for testing current understanding of tropospheric chemistry. The ozone production efficiency (OPE) for the 5 air mass categories ranged from 4.5 (TIC) to 8.5 (FTMA), consistent with photochemical aging of air masses exiting the Mexico City Metropolitan Area.

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