Simulations of organic aerosol concentrations in Mexico City using the WRF-CHEM model during the MCMA-2006/MILAGRO campaign by Molina, Luisa Tan, Li, Guohui, Lei, Wenfang, Zavala, M., Tsimpidi, A. P., Karydis, V. A., Pandis, S. N., Canagaratna, M. R.

“…Including the non-OH feedback and the contribution of glyoxal and methylglyoxal, the non-traditional SOA model can explain up to 83% of the observed SOA in the urban area, and the underestimation during late morning and early afternoon is reduced to 0.9 μg m[superscript −3] or 6% on average. …”
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Impact of primary formaldehyde on air pollution in the Mexico City Metropolitan Area by Lei, Wenfang, de Foy, B., Molina, Mario J., Molina, Luisa Tan, Zavala-Perez, Miguel Angel, Volkamer, R. A.

“…While primary HCHO contributes predominantly to the ambient HCHO concentration between nighttime and morning rush hours, significant influence on the radical budget and O3 production starts early in the morning, peaks at mid-morning and is sustained until early afternoon.…”
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Aerosol effects on the photochemistry in Mexico City during MCMA-2006/MILAGRO campaign by Li, Guohui, Molina, Luisa Tan, Bei, Naifang, Tie, Xuexi

“…In general, the photolysis rates are reduced due to the absorption by carbonaceous aerosols, particularly in the early morning and late afternoon hours with a long aerosol optical path. However, with the growth of aerosol particles and the decrease of the solar zenith angle around noontime, aerosols can slightly enhance photolysis rates when ultraviolet (UV) radiation scattering dominates UV absorption by aerosols at the lower-most model layer. …”
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Measurements of Volatile Organic Compounds Using Proton Transfer Reaction - Mass Spectrometry during the MILAGRO 2006 Campaign by Fortner, E. C., Zheng, J., Zhang, R., Knighton, W. Berk, Molina, Luisa Tan, André, M., Volkamer, R. A., Sheehy, P. M.

“…Diurnal profiles of weekday and weekend/holiday aromatic VOC concentrations showed the influence of vehicular traffic during the morning rush hours and during the afternoon hours. Plumes including elevated toluene as high as 216 parts per billion (ppb) and ethyl acetate as high as 183 ppb were frequently observed during the late night and early morning hours, indicating the possibility of significant industrial sources of the two compounds in the region. …”
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Mexico City Aerosol Analysis During Milagro Using High Resolution Aerosol Mass Spectrometry at the Urban Supersite (T0) - Part 1: Fine Particle Composition and Organic Source Appor... by Aiken, A. C., Foy, B. de, Wiedinmyer, C., Ulbrich, I. M., Wehrli, M. N., Szidat, S., Prevot, A. S. H., Noda, J., Wacker, L., Volkamer, R., Fortner, E. C., Wang, J., Laskin, A., Shutthanandan, V., Zheng, J., Zhang, R., Paredes-Miranda, G., Arnott, W. P., Molina, Luisa Tan, Sosa, G., Querol, X., Jimenez, J. L., DeCarlo, P. F.

“…The ambient BBOA/ΔCH3CN ratio is much higher in the afternoon when the wildfires are most intense than during the rest of the day. …”
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Evaluation of the volatility basis-set approach for the simulation of organic aerosol formation in the Mexico City metropolitan area by Tsimpidi, A. P., Karydis, V. A., Zavala-Perez, Miguel Angel, Lei, Wenfang, Molina, Luisa Tan, Ulbrich, I. M., Jimenez, J. L., Pandis, S. N.

“…The small OA underprediction during the rush hour periods and overprediction in the afternoon suggest potential improvements to the description of fresh primary organic emissions and the formation of the oxygenated organic aerosols respectively, although they may also be due to errors in the simulation of dispersion and vertical mixing. …”
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