Fig. 1. Evolution diagram of aerosol mass concentration and meteorological element during a dust episode in Shouxian from January 14 to 16, 2021

Fig. 2. Temporal variation of aerosol number concentration. (a) Different particle size scales; (b) total number concentration

Fig. 3. Aerosol spectral distribution at different stages. (a) Number concentration; (b) surface area concentration; (c) volume concentration

Fig. 4. Temporal variation of aerosol scattering characteristics. (a) Total scattering coefficient; (b) backscattering ratio

Fig. 5. Vertical distribution of aerosol measured by three-wavelength polarization lidar. (a) 355 nm extinction coefficient; (b) 532 nm extinction coefficient; (c) 1064 nm extinction coefficient; (d) depolarization ratio; (e) Angstöm index; (f) optical properties of aerosol at 0.5 km height