@Article{acp-25-16983-2025,
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 = {Unexpectedly persistent 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 = {Atmospheric Chemistry and Physics},
VOLUME = {25},
YEAR = {2025},
NUMBER = {22},
PAGES = {16983--17007},
URL = {https://acp.copernicus.org/articles/25/16983/2025/},
DOI = {10.5194/acp-25-16983-2025}
}