Measurement report: Large contribution of biomass burning and aqueous-phase processes to the wintertime secondary organic aerosol formation in Xi'an, Northwest China. - Duan, Jing; Huang, Ru-Jin; Gu, Yifang; Lin, Chunshui; Zhong, Haobin; Xu, Wei; Liu, Quan; You, Yan; Ovadnevaite, Jurgita; Ceburnis, Darius; Hoffmann, Thorsten; O'Dowd, Colin (Atmospheric Chemistry & Physics, 2022)