Research Area

Gases and particles in the atmosphere can both impact human health and modify the climate. The formation and destruction of the relevant substances is governed by the chemical processing of natural and human driven emissions. My interest within atmospheric chemistry is on the drivers of this chemical processing of the fuel of emissions. I’m especially interested in those substances which readily move between the gas and particulate phases and/or are otherwise recycled and play a catalytic role. At present I am focusing on nitrogen and halogens in this context.

Research Interests

• Atmospheric chemistry impacts on air quality and climate
• Multiphase Chemistry
• Nitrogen and Halogens

Recent Publications

• Cheng, Z., Qiu, X., Li, A., Chai, Q., Shi, X., Ge, Y., Koenig, T. K., Zheng, Y., Chen, S., Hu, M., Ye, C., Cheung, R. K. Y., Modini, R. L., Chen, Q., Shang, J., and Zhu, T.; Heterogeneous reactions significantly contribute to the atmospheric formation of nitrated aromatic compounds during the haze episode in urban Beijing. Sci. of the Tot. Env., 917, 170612, doi: 10.1016/j.scitotenv.2024.170612, 2024.
• Zheng, Y., Miao, R., Zhang, Q., Li, Y., Cheng, X., Liao, K., Koenig, T. K., Ge, Y., Tang, L., Shang, D., Hu, M., Chen, S., and Chen, Q.; Secondary Formation of Submicron and Supermicron Organic and Inorganic Aerosols in a Highly Polluted Urban Area. J. Geophys. Res. Atmos., 128, e2022JD037865, doi:10.1029/2022JD037865, 2023.
• Koenig, T. K., Volkamer, R., Apel, E. C., Bresch, J. F., Cuevas, C. A., Dix, B., Eloranta, E. W., Fernandez, R. P., Hall, S. R., Hornbrook, R. S., Pierce, R. B., Reeves, J. M., Saiz-Lopez, A., and Ullmann, K.: Ozone depletion due to dust release of iodine in the free troposphere, Science Advances, 7, 52, doi:10.1126/sciadv.abj6544, 2021.
• Koenig, T.K., Baidar S., Campuzano-Jost, P., Cuevas, C.A., Dix, B., Fernandez, R.P., Guo, H., Hall, S.R., Kinnison, D., Nault, B.A., Ullmann, K., Jimenez, J.L., Saiz-Lopez, A. and Volkamer R.: Quantitative Detection of Iodine in the Stratosphere, Proc. Nat. Acad. Sci., 117 (4), 1860-1866, doi:10.1073/pnas.1916828117, 2020.