“…Hopner et al, 2018;Kaskaoutis et al, 2021). Several studies have examined the global and regional frequency distributions of various aerosol types according to their optical properties (e.g., Lin et al, 2022;Logothetis et al, 2020;Mok et al, 2017;Schmeisser et al, 2017), but these studies have limitations in terms of long-term variation.…”