Evolution of secondary organic aerosol under extremely high humidity conditions in urban areas of southwestern China: Formation and scavenging - Yifan Zhao; Zhier Bao; Xin Long; Yiliang Liu; Yan Han; Lingshuo Meng; Xiaoling Zeng; Lijuan Li; Xin Qi; Zhanliang Li; Chao Peng; Liuyi Zhang; et al. (Atmospheric Research, 2026)