Reflectance Analysis of Seasonal Snow Based on Field Measurement in Fuyun County, Xinjiang Province
LI Yun1,2, ZHAO Shu-he1,2*, FENG Xue-zhi1,2, XIAO Peng-feng1,2, LIANG Ji3, WANG Jian-geng1,2, LI Hong-xing3, YAN Li-li3
1. Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing 210093, China 2. Department of Geographic Information Science, Nanjing University, Nanjing 210093, China 3. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
Abstract：Seasonal snow reflectance in the spectral range 350～2 500 nm was collected by a portable spectroradiometer in the field. The experiments were carried out in Fuyun County, Xinjiang Province. Spectral characteristics of snow in the region were drawn by the contrast with ice. And the influence of solar elevation angle, slope, snow depth and contamination on snow reflectance was analyzed. The observations suggest that snow reflectance is high in visible light range and decreases gradually with increasing wavelength. As the solar elevation angle increases, snow reflectance decreases and the maximum variations are observed around 1 090 and 1 300 nm. For the existence of slope, snow reflectance rises significantly. As snow depth increases locally, snow reflectance increases and the maximum variations are observed around 400～500 and 1 250～1 320 nm. As contamination content increases, snow reflectance decreases and troughs and crests of spectral curve flatten. The measurement and analysis of seasonal snow reflectance are of great significance for monitoring and retrieval of snow characteristics.
Key words：Seasonal snow;Spectral analysis;Spectral measurement;Fuyun County of Xinjiang Province
李 云1, 2，赵书河1, 2*，冯学智1, 2，肖鹏峰1, 2，梁 继3，王剑庚1, 2，李红星3，彦立利3 . 基于实测数据的新疆富蕴季节性积雪光谱分析 [J]. 光谱学与光谱分析, 2013, 33(06): 1593-1597.
LI Yun1,2, ZHAO Shu-he1,2*, FENG Xue-zhi1,2, XIAO Peng-feng1,2, LIANG Ji3, WANG Jian-geng1,2, LI Hong-xing3, YAN Li-li3. Reflectance Analysis of Seasonal Snow Based on Field Measurement in Fuyun County, Xinjiang Province . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(06): 1593-1597.
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