@Article{egusphere-2026-3211,
AUTHOR = {Li, H. and Liu, X. and Chen, S. X.},
TITLE = {Nonlinear and regime-dependent precursor effects shape wintertime PM$_{2.5}$ formation in Beijing under calm conditions},
JOURNAL = {EGUsphere},
VOLUME = {2026},
YEAR = {2026},
PAGES = {1--23},
URL = {https://egusphere.copernicus.org/preprints/2026/egusphere-2026-3211/},
DOI = {10.5194/egusphere-2026-3211}
}