Hyperspectral analysis of snow reflectance to understand the effects of contamination and grain size

摘要: Reflectance data for contaminated and different grain-size snow were collected using a spectroradiometer ranging from 350 to 2500 nm. Contamination was predominantly due soil. The radiometer binned at 10 nm intervals by averaging, then principal component analysis, shape, size strength of the absorption peak, first second derivatives computed, providing information about effect grain contamination on reflectance. Relative showed distinct reverse pattern 1025 after continuum removal. Band depth an increase with increasing size, whereas band found decrease increased soil contamination. curve shape right asymmetric change left asymmetry in derivative reflectance visible region shift peak Soil significantly reduced albedo low level but little influence higher level. strength, characteristics have shown potential identify based metamorphism satellite-based hyperspectral remote sensing.