{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T18:19:22Z","timestamp":1783534762181,"version":"3.55.0"},"reference-count":23,"publisher":"American Geophysical Union (AGU)","issue":"15","license":[{"start":{"date-parts":[[2008,8,5]],"date-time":"2008-08-05T00:00:00Z","timestamp":1217894400000},"content-version":"vor","delay-in-days":4,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Geophysical Research Letters"],"published-print":{"date-parts":[[2008,8]]},"abstract":"<jats:p>Photochemically processed urban emissions were characterized at a mountain top location, free from local sources, within the Mexico City Metropolitan Area. Analysis of the Mexico City emission plume demonstrates a strong correlation between secondary organic aerosol and odd oxygen (O<jats:sub>3<\/jats:sub> + NO<jats:sub>2<\/jats:sub>). The measured oxygenated\u2010organic aerosol correlates with odd oxygen measurements with an apparent slope of (104\u2013180) <jats:italic>\u03bc<\/jats:italic>g m<jats:sup>\u22123<\/jats:sup> ppmv<jats:sup>\u22121<\/jats:sup> (STP) and r<jats:sup>2<\/jats:sup> &gt; 0.9. The dependence of the observed proportionality on the gas\u2010phase hydrocarbon profile is discussed. The observationally\u2010based correlation between oxygenated organic aerosol mass and odd oxygen may provide insight into poorly understood secondary organic aerosol production mechanisms by leveraging knowledge of gas\u2010phase ozone production chemistry. These results suggest that global and regional models may be able to use the observed proportionality to estimate SOA as a co\u2010product of modeled O<jats:sub>3<\/jats:sub> production until more complete models of SOA formation become available.<\/jats:p>","DOI":"10.1029\/2008gl034058","type":"journal-article","created":{"date-parts":[[2008,8,4]],"date-time":"2008-08-04T20:00:32Z","timestamp":1217880032000},"source":"Crossref","is-referenced-by-count":174,"title":["Correlation of secondary organic aerosol with odd oxygen in Mexico City"],"prefix":"10.1029","volume":"35","author":[{"given":"Scott C.","family":"Herndon","sequence":"first","affiliation":[{"name":"Aerodyne Research, Inc.  Billerica Massachusetts USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Timothy B.","family":"Onasch","sequence":"additional","affiliation":[{"name":"Aerodyne Research, Inc.  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