For studying the pollution by dust in winter season at Tonghua city in China, the measurements of spectral reflectance were carried out to estimate the concentration of dust in the snow deposited on the ground.
In this study, we found the characteristics of spectral reflectance of the snow surface contained with natural minerals and anthropogenic dust. The most effective indices of spectral reflectance for estimating the concentration (mg/cm3) of dust in the snow were dependent on reflectance of visible range (B1) which mean wavelength value of 450 nm, 475 nm and 500 nm. The regression equations for the relationship between BI and concentration (Y) of dust in the snow were expressed in the form of logarithmic expression (Y=a+b log (B1)). The correlation coefficients obtained from estimated formula were more than 0.89, and the standard errors of prediction were less than 1.44.
It can concluded that the spectral reflecance method is useful for estimating of the concentration of dust contained in the snow deposited on the ground during winter season in the range 0.5-6.0 mg/cm3 at this area.
