@Article{egusphere-2025-2404,
AUTHOR = {Qu, K. and Wang, X. and Yan, Y. and Jin, X. and He, L.-Y. and Huang, X.-F. and Cai, X. and Shen, J. and Peng, Z. and Xiao, T. and Vrekoussis, M. and Kanakidou, M. and Brasseur, G. P. and Daskalakis, N. and Zeng, L. and Zhang, Y.},
TITLE = {Persisted PM$_{2.5}$ pollution in the Pearl River Delta, South China, in the 2015--2017 cold seasons: The dominant role of meteorological changes during the El Ni\~{n}o-to-La Ni\~{n}a transition over emission reduction},
JOURNAL = {EGUsphere},
VOLUME = {2025},
YEAR = {2025},
PAGES = {1--38},
URL = {https://egusphere.copernicus.org/preprints/2025/egusphere-2025-2404/},
DOI = {10.5194/egusphere-2025-2404}
}