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619355 
Journal Article 
Characteristics of the NO-NO2-O3 system in different chemical regimes during the MIRAGE-Mex field campaign 
Shon, ZH; Madronich, S; Song, SK; Flocke, FM; Knapp, DJ; Anderson, RS; Shetter, RE; Cantrell, CA; Hall, SR 
2008 
Yes 
Atmospheric Chemistry and Physics Discussions
ISSN: 1680-7367
EISSN: 1680-7375 
8 
1 
2275-2309 
English 
WOS:000262413000018 
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). In general, NO2/NO ratios, which can be used as an indicator to test current understanding of tropospheric chemistry mechanism, are near photostationary state. The air masses were categorized into 5 groups: boundary layer (labeled as "BL"), free troposphere (continental, "FTCO" and marine, "FTMA"), biomass burning ("BB"), and Tula industrial complex ("TIC"). The time- and air mass-dependent NO2/NO ratios ranged from 2.35 (TIC) to 5.18 (BB), while the NOx/NOy ratios varied from 0.17 (FTCO) to 0.54 (BL). The ozone production efficiency for the 5 air mass categories ranged from 5.0 (TIC) to 10.2 (BL), indicating photochemically young and reactive air masses. ABSTRACT FROM AUTHOR Copyright of Atmospheric Chemistry & Physics Discussions is the property of European Geosciences Union and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts) 
ATMOSPHERIC circulation; BOUNDARY layer (Meteorology); REFLECTION (Optics); FLUID dynamics; TROPOSPHERIC chemistry