Articles | Volume 24, issue 7
https://doi.org/10.5194/acp-24-3953-2024
https://doi.org/10.5194/acp-24-3953-2024
Research article
 | 
03 Apr 2024
Research article |  | 03 Apr 2024

Chemical properties and single-particle mixing state of soot aerosol in Houston during the TRACER campaign

Ryan N. Farley, James E. Lee, Laura-Hélèna Rivellini, Alex K. Y. Lee, Rachael Dal Porto, Christopher D. Cappa, Kyle Gorkowski, Abu Sayeed Md Shawon, Katherine B. Benedict, Allison C. Aiken, Manvendra K. Dubey, and Qi Zhang

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Subject: Aerosols | Research Activity: Field Measurements | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
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Cited articles

Ahmed, M., Rappenglück, B., Das, S., and Chellam, S.: Source apportionment of volatile organic compounds, CO, SO2 and trace metals in a complex urban atmosphere, Environ. Adv., 6, 100127, https://doi.org/10.1016/j.envadv.2021.100127, 2021. 
Allan, J. D., Delia, A. E., Coe, H., Bower, K. N., Alfarra, M. R., Jimenez, J. L., Middlebrook, A. M., Drewnick, F., Onasch, T. B., Canagaratna, M. R., Jayne, J. T., and Worsnop, D. R.: A generalised method for the extraction of chemically resolved mass spectra from Aerodyne aerosol mass spectrometer data, J. Aerosol Sci., 35, 909–922, https://doi.org/10.1016/j.jaerosci.2004.02.007, 2004. 
Al-Naiema, I. M., Hettiyadura, A. P. S., Wallace, H. W., Sanchez, N. P., Madler, C. J., Cevik, B. K., Bui, A. A. T., Kettler, J., Griffin, R. J., and Stone, E. A.: Source apportionment of fine particulate matter in Houston, Texas: insights to secondary organic aerosols, Atmos. Chem. Phys., 18, 15601–15622, https://doi.org/10.5194/acp-18-15601-2018, 2018. 
Anastasopolos, A. T., Sofowote, U. M., Hopke, P. K., Rouleau, M., Shin, T., Dheri, A., Peng, H., Kulka, R., Gibson, M. D., Farah, P., and Sundar, N.: Air quality in Canadian port cities after regulation of low-sulphur marine fuel in the North American Emissions Control Area, Sci. Total Environ., 791, 147949, https://doi.org/10.1016/j.scitotenv.2021.147949, 2021. 
Andreae, M. O.: Soot carbon and excess fine potassium: Long-range transport of combustion-derived aerosols, Science, 220, 1148–1151, https://doi.org/10.1126/science.220.4602.1148, 1983. 
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Short summary
The black carbon aerosol composition and mixing state were characterized using a soot particle aerosol mass spectrometer. Single-particle measurements revealed the major role of atmospheric processing in modulating the black carbon mixing state. A significant fraction of soot particles were internally mixed with oxidized organic aerosol and sulfate, with implications for activation as cloud nuclei.
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