Correlation of secondary organic aerosol with odd oxygen in Mexico City

被引：145

作者：

Herndon, Scott C. ^{[1
]}

Onasch, Timothy B. ^{[1
]}

Wood, Ezra C. ^{[1
]}

Kroll, Jesse H. ^{[1
]}

Canagaratna, Manjula R. ^{[1
]}

Jayne, John T. ^{[1
]}

Zavala, Miguel A. ^{[5
,7
]}

Knighton, W. Berk ^{[4
]}

Mazzoleni, Claudio ^{[8
]}

Dubey, Manvendra K. ^{[8
]}

Ulbrich, Ingrid M. ^{[9
]}

Jimenez, Jose L. ^{[9
]}

Seila, Robert ^{[6
]}

de Gouw, Joost A. ^{[3
]}

de Foy, Benjamin ^{[2
]}

Fast, Jerome ^{[10
]}

Molina, Luisa T. ^{[5
,7
]}

Kolb, Charles E. ^{[1
]}

Worsnop, Douglas R. ^{[1
]}

机构：

[1] Aerodyne Res Inc, Billerica, MA 01821 USA

[2] St Louis Univ, Dept Earth & Atmospher Sci, St Louis, MO 63103 USA

[3] NOAA, Earth Syst Res Lab, Boulder, CO 80305 USA

[4] Montana State Univ, Dept Chem & Biochem, Bozeman, MT 59717 USA

[5] Molina Ctr Energy & Environm, La Jolla, CA 92037 USA

[6] Natl Exposure Res Lab, Environm Protect Agcy, Res Triangle Pk, NC 27711 USA

[7] MIT, Cambridge, MA 02139 USA

[8] Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA

[9] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA

[10] Pacific NW Natl Lab, Richland, WA 99352 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2008年 / 35卷 / 15期

关键词：

D O I：

10.1029/2008GL034058

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

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-3 + NO2). The measured oxygenated-organic aerosol correlates with odd oxygen measurements with an apparent slope of (104-180) mu g m(-3) ppmv(-1) (STP) and r(2) > 0.9. The dependence of the observed proportionality on the gas-phase hydrocarbon profile is discussed. The observationally-based 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-phase 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-product of modeled O-3 production until more complete models of SOA formation become available.

引用

页数：6

共 23 条

[1] Chemical and microphysical characterization of ambient aerosols with the aerodyne aerosol mass spectrometer [J].