Characteristics of the NO-NO2-O3 system in different chemical regimes during the MIRAGE-Mex field campaign Z.-H. Shon1, S. Madronich2, S.-K. Song3, F. M. Flocke2, D. J. Knapp2, R. S. Anderson2, R. E. Shetter2, C. A. Cantrell2, S. R. Hall2, and X. Tie2 1Department of Environmental Engineering, Dong-Eui University, 995 Eomgwangno, Busan 614-714, Republic of Korea 2Atmospheric Chemistry Division, National Center for Atmospheric Research, P.O. Box 3000 Boulder, CO 80307, USA 3Devision of Earth Environmental System, Pusan National University, 30 Jang Jeon Dong, Geum Jeong Gu, Busan 609-735, Republic of Korea
Abstract. The NO-NO2 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, NO2/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.
Citation: Shon, Z.-H., Madronich, S., Song, S.-K., Flocke, F. M., Knapp, D. J., Anderson, R. S., Shetter, R. E., Cantrell, C. A., Hall, S. R., and Tie, X.: Characteristics of the NO-NO2-O3 system in different chemical regimes during the MIRAGE-Mex field campaign, Atmos. Chem. Phys., 8, 7153-7164, doi:10.5194/acp-8-7153-2008, 2008.