@Article{acp-2021-579,
AUTHOR = {Li, L. and Lu, C. and Chan, P.-W. and Lan, Z.-J. and Zhang, W.-H. and Yang, H.-L. and Wang, H.-C.},
TITLE = {Impact of the COVID-19 pandemic on the observed vertical distributions of PM$_{2.5}$, NO$_x$, and O$_3$ from a tower in the Pearl River Delta},
JOURNAL = {Atmospheric Chemistry and Physics Discussions},
VOLUME = {2021},
YEAR = {2021},
PAGES = {1--32},
URL = {https://acp.copernicus.org/preprints/acp-2021-579/},
DOI = {10.5194/acp-2021-579}
}