Fig. 1. Structural diagram of Raman-Mie LiDAR system

Fig. 2. Flowchart for retrieving aerosol LiDAR ratio based on Raman-Mie data

Fig. 3. Comparison of signal denoising results based on different wavelet basis functions. (a) 20240103T23:00; (b) 20240104T22:01;

Fig. 4. Comparison of signal denoising results based on different wavelet decomposition layer numbers. (a) 20240103T23:00; (b) 20240104T22:01; (c) 20240105T23:00; (d) 20240106T19:30; (e) 20240110T21:24; (f) 20240111T20:00; (g) 20240112T19:00; (h) 20240113T01:24

Fig. 5. Aerosol backscatter coefficients and PBLHs retrieved from Raman LiDAR and Mie LiDAR. (a) 20240103T23:00; (b) 20240104T22:01; (c) 20240105T23:00; (d) 20240106T19:30; (e) 20240110T21:24; (f) 20240111T20:00; (g) 20240112T19:00; (h) 20240113T01:24

Fig. 6. Deviation of aerosol backscatter coefficients retrieved from Raman LiDAR and Mie LiDAR under different LiDAR ratios. (a) 20240103T23:00; (b) 20240104T22:01; (c) 20240105T23:00; (d) 20240106T19:30; (e) 20240110T21:24; (f) 20240111T20:00; (g) 20240112T19:00; (h) 20240113T01:24

Fig. 7. Aerosol extinction coefficients based on Mie LiDAR data. (a) 20240103T23:00; (b) 20240104T22:01; (c) 20240105T23:00; (d) 20240106T19:30; (e) 20240110T21:24; (f) 20240111T20:00; (g) 20240112T19:00; (h) 20240113T01:24

Fig. 8. Time series. (a) Aerosol extinction coefficient and boundary layer height; (b) aerosol backscatter coefficient and boundary layer height; (c) aerosol depolarization ratio

Fig. 9. Temporal variations of ground-level PM_2.5 and PM₁₀ mass concentrations and their ratio. (a) Ground-level PM_2.5 and PM₁₀ mass concentrations; (b) ratio of ground-level PM_2.5 mass concentration to PM₁₀ mass concentration

Fig. 10. Aerosol extinction coefficients at 0.69 km above ground level and PM_2.5 mass concentrations

Fig. 11. Temporal variations of surface wind direction, wind speed, temperature, and humidity

Fig. 12. Spatial distribution of WCWT from January 6 to January 10, 2024