- 1Southern University of Science and Technology, College of Engineering , Environmental science and technology school, China (chenyy2020@mail.sustech.edu.cn)
- 2Department of Atmospheric and Oceanic Sciences & Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China
- 3Center for Sustainability Science and Strategy, Massachusetts Institute of Technology, Cambridge, MA, USA
- 4School of Chemistry, University of Bristol, Bristol, UK
- 5Commonwealth Scientific and Industrial Research Organisation – Environment, Aspendale, Victoria, Australia
- 6Coastal Atmosphere and Climate of the Greater Bay Area Observation and Research Station of Guangdong Province, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
- 7Shenzhen Key Laboratory of Precision Measurement and Early Warning Technology for Urban Environmental Health Risks, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, China
Sulfur hexafluoride (SF6), nitrogen trifluoride (NF3), and three types of perfluorocarbons (PFCs; PFC-14, PFC-116, and PFC-318) are perfluorinated greenhouse gases (PF-GHGs). PF-GHGs have long atmospheric lifetimes and global warming potentials thousands of times greater than carbon dioxide (CO2). Using high-frequency continuous in situ observations from the Xichong Monitoring station at Shenzhen, China and a Bayesian inversion framework, we assess the 2021-2023 PF-GHG emissions in southeastern China, a region featuring substantial growth in population and industries. We find a continued increase in emissions of all PF-GHGs. During 2021-2023, NF3 emissions show the highest annual growth rate of 40.38% yr-1, likely linked with the increasing demand in semiconductor industries in this region, while PFC-14 has the lowest of 5.87% yr-1. Regarding CO2-equivalent emissions, SF6 contributes the most to total PF-GHG growth (51.75%), followed by NF3 (30.86%). As for the seasonality in PF-GHG emissions in southeastern China, SF6 and PFC-116 emissions show significant seasonal variation. The seasonal variabilities in SF6 are likely associated with the high winter electricity demand, while the winter peaks in PFC-116 emissions may tie with semiconductor manufacturing. PFC-318 exhibits the largest seasonal variation, with a winter-to-spring and autumn emissions ratio of 5.10. The increased PFC-318 emissions in winter might be due to heightened HCFC-22 feedstock uses. The findings provide guidance for targeted mitigation strategies to address the rising emissions.
How to cite: Chen, Y., Yao, B., An, M., Ding, A., Liu, S., Li, X., Li, Y., O'Doherty, S., Krummel, P., and Zhu, L.: Inverse Modeling of High Global Warming Potential Perfluorinated Greenhouse Gases in Southeastern China, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-5703, https://doi.org/10.5194/egusphere-egu25-5703, 2025.
