Fig. 1. Schematic diagram of study area (the ocean area within the red box)

Fig. 2. Flow chart of data processing process

Fig. 3. ShadedErrorBar diagrams of optical characteristics and relative humidity from 2007 to 2016. (a) 532 nm total backscattering coefficient; (b) 532 nm extinction coefficient; (c) depolarization ratio

Fig. 4. ShadedErrorBar diagrams of optical properties and relative humidity in the four seasons from 2007 to 2016, and the proportion of various types of aerosols in the sea area in the four seasons. (a) 532 nm total backscattering coefficient; (b) 532 nm extinction coefficient; (c) depolarization ratio; (d) proportion chart of various types of aerosols

Fig. 5. Four seasons boxplot of the relationship between 532 nm total backscattering coefficient and relative humidity of aerosols in the sea area from 2007 to 2016. (a) Spring; (b) summer; (c) autumn; (d) winter

Fig. 6. Four seasons boxplot of the relationship between 532 nm extinction coefficient and relative humidity of aerosols in the sea area from 2007 to 2016. (a) Spring; (b) summer; (c) autumn; (d) winter

Fig. 7. Four seasons boxplot of the relationship between depolarization ratio and relative humidity of aerosols in the sea area from 2007 to 2016. (a) Spring; (b) summer; (c) autumn; (d) winter

Fig. 8. ShadedErrorBar diagrams of optical characteristics and relative humidity corresponding to annual segmentation in 2007–2016. (a) 532 nm total backscattering coefficient; (b) 532 nm extinction coefficient; (c) depolarization ratio

Fig. 9. ShadedErrorBar diagram of 532 nm backscattering coefficient and relative humidity of aerosols in each sea area from 2007 to 2016. (a) Spring; (b) summer; (c) autumn; (d) winter

Fig. 10. ShadedErrorBar diagram of 532 nm extinction coefficient and relative humidity of aerosols in each sea area from 2007 to 2016. (a) Spring; (b) summer; (c) autumn; (d) winter

Fig. 11. ShadedErrorBar diagram of depolarization ratio and relative humidity of aerosols in each sea area from 2007 to 2016.(a) Spring; (b) summer; (c) autumn; (d) winter

Fig. 12. Proportion of aerosol species distribution in each sea area from 2007 to 2016

Fig. 13. Aerosol optical properties and altitude distribution error bar chart of each sea area in 2007–2016.(a) 532 nm total backscattering coefficient; (b) 532 nm extinction coefficient; (c) depolarization ratio

Fig. 14. Distribution of aerosol species in each sea area and the proportion of the altitude layer in 2007–2016.(a) The Bohai Sea and Yellow Sea; (b) the East China Sea; (c) the South China Sea