Publications

Jeong, C.-H., Wong, Y. K., Trieu, N., & Evans, G. J. Urban contrasts in traffic-related PM_2.5 resolved through high-time-resolution analysis of exhaust and non-exhaust emissions. Atmospheric Environment, 382, 122178. https://doi.org/10.1016/j.atmosenv.2026.122178

Wong, Y. K., Liu, K. M., Yeung, C., Leung, K. K. M., & Yu, J. Z. Source apportionment of fine and coarse particulate matter in Hong Kong and its implications to PM₁₀ air quality management. Atmospheric Environment, 368, 121763. https://doi.org/10.1016/j.atmosenv.2025.121763

Edwards, T. D., Wong, Y. K., Jeong, C.-H., Wang, J. M., Su, Y., & Evans, G. J. Comparison of methods for resolving the contributions of local emissions to measured concentrations. Atmospheric Measurement Techniques, 18, 2201–2240. https://doi.org/10.5194/amt-18-2201-2025

Wong, Y. K., Chan, W. W., Gu, D. S., Yu, J. Z., & Lau, A. K. H. Tracking source variations of inhalation cancer risks and ozone formation potential in Hong Kong over two decades (2000−2020) using toxic air pollutant monitoring data. Environment and Health, 2, 411–421. https://doi.org/10.1021/envhealth.3c00209

Wong, Y. K., Chan, W. W., Gu, D. S., Wong, T. W., Chan, K. J. D., Yu, J. Z., & Lau, A. K. H. Characterization of toxic air pollutants in Hong Kong, China: Two-decadal trends and health risk assessments. Atmospheric Environment, 314, 120129. https://doi.org/10.1016/j.atmosenv.2023.120129

Yu, X., Wong, Y. K., & Yu, J. Z. Abundance and sources of organic nitrogen in fine (PM_2.5) and coarse (PM_2.5–10) particulate matter in urban Hong Kong. Science of the Total Environment, 165880. https://doi.org/10.1016/j.scitotenv.2023.165880

Lai, D. E., Wong, Y. K., Xu, R. S., Xing, S. N., Ng, S. I. M., Kong, L., Yu, J. Z., Huang, D. D., & Chan, M. N. Significant conversion of organic sulfur from hydroxymethanesulfonate to inorganic sulfate and peroxydisulfate ions upon heterogeneous OH oxidation. Environmental Science and Technology Letters, 10, 773–778. https://doi.org/10.1021/acs.estlett.3c00472

Xu, R. S., Ng, S. I. M., Chow, W. S., Wong, Y. K., Wang, Y. C., Lai, D. E., Yao, Z. P., So, P. K., Yu, J. Z., & Chan, M. N. Chemical transformation of α-pinene-derived organosulfate via heterogeneous OH oxidation: implications for sources and environmental fates of atmospheric organosulfates. Atmospheric Chemistry and Physics, 22, 5685–5700. https://doi.org/10.5194/acp-22-5685-2022

Wong, Y. K., Liu, K. M., Yeung, C., Leung, K. K. M., & Yu, J. Z. Measurement report: Characterization and source apportionment of coarse particulate matter in Hong Kong: Insights into the constituents of unidentified mass and source origins in a coastal city in southern China. Atmospheric Chemistry and Physics, 22, 5017–5031. https://doi.org/10.5194/acp-22-5017-2022

Wong, Y. K., Huang, X. H. H., Cheng, Y. Y., & Yu, J. Z. Estimating primary vehicular emission contributions to PM_2.5 using the Chemical Mass Balance model: Accounting for gas-particle partitioning of organic aerosols and oxidation degradation of hopanes. Environmental Pollution, 291, 118131. https://doi.org/10.1016/j.envpol.2021.118131

Wong, Y. K., Huang, X. H. H., Louie, P. K. K., Yu, A. L. C., Chan, D. H. L., & Yu, J. Z. Tracking separate contributions of diesel and gasoline vehicles to roadside PM_2.5 through online monitoring of volatile organic compounds and PM_2.5 organic and elemental carbon: A 6-year study in Hong Kong. Atmospheric Chemistry and Physics, 20, 9871–9882. https://doi.org/10.5194/acp-20-9871-2020

Wong, Y. K., Huang, X. H. H., & Yu, J. Z. Incorporating hopane degradation into chemical mass balance model: Improving accuracy of vehicular source contribution estimation. Atmospheric Environment, 210, 211–219. https://doi.org/10.1016/j.atmosenv.2019.04.055

Wong, Y. K., Huang, X. H. H., Cheng, Y. Y., Louie, P. K. K., Yu, A. L. C., Tang, A. W. Y., Chan, D. H. L., & Yu, J. Z. Estimating contributions of vehicular emissions to PM_2.5 in a roadside environment: A multiple approach study. Science of the Total Environment, 672, 776–788. https://doi.org/10.1016/j.scitotenv.2019.03.463

Wang, Q. Q., Huang, X. H. H., Tam, C. V. F., Zhang, X. X., Liu, K. M., Yeung, C., Feng, Y. M., Cheng, Y. Y., Wong, Y. K., Ng, W. M., Wu, C., Zhang, Q. Y., Zhang, T., Lau, N. T., Yuan, Z. B., Lau, K. H. A., & Yu, J. Z. Source apportionment of fine particulate matter in Macao, China with and without organic tracers: A comparative study using positive matrix factorization. Atmospheric Environment, 198, 183–193. https://doi.org/10.1016/j.atmosenv.2018.10.057

Wong, Y. K., Jeong, C.-H., Wang, J. M., Trieu, N., Jose, C., Wang, X., Su, Y., Celo, V., & Evans, G. J. Long-term characterization of non-exhaust particulate concentrations at two contrasting near-road sites: source contributions and real-world emission factors.

Jeong, C.-H., Wong, Y. K., Trieu, N., Jose, C., Wang, X., Xu, J., Saeedi, M., Su, Y., Charron, C., Chan, A., Hatzopoulou, M., & Evans, G. J. Spatial variations of non-exhaust emissions across seasons using fixed-site and mobile measurements.

Wong, Y. K., Lim, N. B. Y., Morris, E. A., Liu, X., Jeong, C.-H., Iorio, K., Wang, J. M., Edwards, T. D., Trieu, N., Jose, C., Wang, X., Roussy, S. S., Adams, M. D., Su, Y., Brook, J. R., & Evans, G. J. Recognizing and addressing the limitations of electrochemical sensors to resolve intra-city and localized spatiotemporal variability in atmospheric NO₂ and O₃.

Wong, Y. K., Morris, E. A., Liu, X., Jeong, C.-H., Wang, J. M., Su, Y., & Evans, G. J. Characterization of spatiotemporal variability of traffic-related air pollution in Toronto, Canada using a low-cost sensor network.

Evans, G. J., Jeong, C.-H., Wong, Y. K., Trieu, N., Wang, X., Jose, C., Roussy, S., Pay-Perez, M., Xu, J., Tu, R., Iorio, K., Adams, M., Chan, A., Franklin, M., Hatzopoulou, M. Improved assessment and characterization of traffic related particulate emissions (IMPACT). Research report submitted to U.S. Health Effects Institute.

Lau, A. K. H., Yu, J. Z., Gu, D. S., Wong, Y. K., Chan, W. W., Yeung, D., Wong, H. Y., & Wong, T. W. (2023). Review and integrated data analysis of toxic air pollutants over Hong Kong. Study report submitted to Hong Kong Environmental Protection Department.

Wong, Y. K. & Yu, J. Z. (2023). Speciation and source apportionment of particulate matter in Hong Kong. Study report submitted to Hong Kong Environmental Protection Department.

Wong, Y. K. & Yu, J. Z. (2021). Speciation and source apportionment of coarse particulate matter in Hong Kong. Study report submitted to Hong Kong Environmental Protection Department.

Yu, J. Z. & Wong, Y. K. (2018). Characterization of vehicle emission in selected roadside and ambient environment in Hong Kong. Study report submitted to Hong Kong Environmental Protection Department.

Wong, Y. K. & Yu, J. Z. (2022). West New Territories landfill fine particulate matter sampling and chemical analysis (2021–2022). Data report submitted to Hong Kong Environmental Protection Department.

Wong, Y. K. & Yu, J. Z. (2021). Gravimetric analysis and elemental speciation of particulate matter on samples from construction sites in Hong Kong. Data report submitted to Hong Kong Environmental Protection Department.

Wong, Y. K. & Yu, J. Z. (2021). West New Territories landfill fine particulate matter sampling and chemical analysis. Data report submitted to Hong Kong Environmental Protection Department.

Yu, J. Z., Wong, Y. K., & Zhang, T. (2020). Chemical speciation of PM_2.5 filter samples – January 1 through December 21, 2019. Data report submitted to Hong Kong Environmental Protection Department.