Wavelength dependency of aerosol optical properties in seoul

In this study, wavelength dependency of aerosol was investigated using the correlation between Single scattering albedo (SSA) and Angstrom exponent (AE), the time series of SSA difference in accordance with wavelength, and the relationship between SSA and AE ratio which defined AE at longer wavelength pair over AE at shorter wavelength pair. All used data in this study are daily mean values. The positive correlation between SSA and AE becomes clear as the wavelength pair of AE becomes longer, however negative correlation with AE at shorter wavelength pair also cannot be neglected. Accordingly, the correlation is well negative between SSA at longer wavelength (LW-SSA) and AE at shorter wavelength pair (SW-AE), opposite to the well positive correlation between SSA at shorter wavelength (SW-SSA) and AE at longer wavelength pair (LW-AE). SSA also shows the interesting relationship with AE ratio. In this study, AE ratio is defined as AE at 675-1020 nm over AE at 340-675 nm. Their relation shows the quadratic correlated shape, and the part of this relationship can be distributed distinctly by the size of aerosol. Time series of SSA difference between two wavelengths can show the properties of dominant related to the information of aerosol size or type.