Articles | Volume 24, issue 18
https://doi.org/10.5194/acp-24-10759-2024
https://doi.org/10.5194/acp-24-10759-2024
Research article
 | 
25 Sep 2024
Research article |  | 25 Sep 2024

Assessing the effectiveness of SO2, NOx, and NH3 emission reductions in mitigating winter PM2.5 in Taiwan using CMAQ

Ping-Chieh Huang, Hui-Ming Hung, Hsin-Chih Lai, and Charles C.-K. Chou

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Cited articles

Byun, D. and Schere, K. L.: Review of the Governing Equations, Computational Algorithms, and Other Components of the Models-3 Community Multiscale Air Quality (CMAQ) Modeling System, Appl. Mech. Rev., 59, 51–77, https://doi.org/10.1115/1.2128636, 2006. 
Chehade, G. and Dincer, I.: Progress in green ammonia production as potential carbon-free fuel, Fuel, 299, 120845, https://doi.org/10.1016/j.fuel.2021.120845, 2021. 
Chen, C.-L., Chen, T.-Y., Hung, H.-M., Tsai, P.-W., Chou, C. C. K., and Chen, W.-N.: The influence of upslope fog on hygroscopicity and chemical composition of aerosols at a forest site in Taiwan, Atmos. Environ., 246, 118150, https://doi.org/10.1016/j.atmosenv.2020.118150, 2021. 
Chen, Y., Shen, H., and Russell, A. G.: Current and Future Responses of Aerosol pH and Composition in the U.S. to Declining SO2 Emissions and Increasing NH3 Emissions, Environ. Sci. Technol., 53, 9646–9655, https://doi.org/10.1021/acs.est.9b02005, 2019. 
Cheng, F.-Y. and Hsu, C.-H.: Long-term variations in PM2.5 concentrations under changing meteorological conditions in Taiwan, Sci. Rep., 9, 6635, https://doi.org/10.1038/s41598-019-43104-x, 2019. 
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Short summary
Models were used to study ways to reduce particulate matter (PM) pollution in Taiwan during winter. After considering various factors, such as physical processes and chemical reactions, we found that reducing NOx or NH3 emissions is more effective at mitigating PM2.5 than reducing SO2 emissions. When considering both efficiency and cost, reducing NH3 emissions seems to be a more suitable policy for the studied environment in Taiwan.
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