Articles | Volume 19, issue 14
Atmos. Chem. Phys., 19, 9641–9661, 2019
https://doi.org/10.5194/acp-19-9641-2019
Atmos. Chem. Phys., 19, 9641–9661, 2019
https://doi.org/10.5194/acp-19-9641-2019
Research article
31 Jul 2019
Research article | 31 Jul 2019

Seasonal differences in formation processes of oxidized organic aerosol near Houston, TX

Qili Dai et al.

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Cited articles

Allen, D. T. and Fraser, M.: An overview of the Gulf Coast Aerosol Research and Characterization Study: The Houston Fine Particulate Matter Supersite, J. Air Waste Manage., 56, 456–466, https://doi.org/10.1080/10473289.2006.10464514, 2006. 
Atkinson, D. B., Massoli, P., O'Neill, N. T., Quinn, P. K., Brooks, S. D., and Lefer, B.: Comparison of in situ and columnar aerosol spectral measurements during TexAQS-GoMACCS 2006: testing parameterizations for estimating aerosol fine mode properties, Atmos. Chem. Phys., 10, 51–61, https://doi.org/10.5194/acp-10-51-2010, 2010. 
Bates, T. S., Quinn, P. K., Coffman, D., Schulz, K., Covert, D. S., Johnson, J. E., Williams, E. J., Lerner, B. M., Angevine, W. M., Tucker, S. C., Brewer, W. A., and Stohl, A.: Boundary layer aerosol chemistry during TexAQS/GoMACCS 2006: Insights into aerosol sources and transformation processes, J. Geophys. Res., 113, D00F01, https://doi.org/10.1029/2008jd010023, 2008. 
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The formation processes of secondary organic aerosol remain to be fully understood. We reported the measurement data from two field campaigns within Houston, TX, to investigate the effects of aqueous-phase chemistry and photochemistry in processing oxygenated organic aerosol (OOA) in winter and summer. Both photochemistry and aqueous-phase processing appear to facilitate more-oxidized OOA formation. The processing mechanism of less-oxidized OOA apparently depended on relative humidity.
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