“…However, the total BSOA concentration in Mt. Gongga was lower than those in a forest site of Sapporo (35.4 ng/m 3 ), nine sites in Guangdong (73.9 ng/m 3 ), and central India (116 ng/m 3 ) (Haque et al., 2023; Nirmalkar et al., 2023; Zhang et al., 2019). The seasonal variation of total BSOA concentration followed the order of winter (39.4 ± 18.5 ng/m 3 ) > summer (33.6 ± 14.5 ng/m 3 ) > autumn (27.6 ± 15.8 ng/m 3 ) > spring (25.3 ± 10.4 ng/m 3 ).…”