Source apportionment and mechanistic analysis of PM2.5 nitrate: interplay of OH and N2O5 in spatial and temporal variations - Li-Ti Chou; Yan-Syuan Lin; Ta-Chih Hsiao; Pei-Ling Wang; Li-Hao Young; Kai-Hsien Chi; Stephen M. Griffith (Science of The Total Environment, 2025)