Spectrum Measurement and Analysis of Snow Cover/Melt in Miyaluo District in Northwest of Sichuan Province
JIAN Ji1, 2, JIANG Hong1, 3*, JIANG Zi-shan4
1. International Institute for Earth System Science, Nanjing University, Nanjing 210093, China 2. Institute of RS and GIS, Chengdu University of Technology, Chengdu 610059, China 3. State Key Laboratory of Subtropical Forest Science & Zhejiang Provinical Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China 4. Department of Earth and Environment Science, University of British Columbia, British Columbia, Canada
Abstract：Mountainous ice sheet and snow cover play an important role in water balance in many area, and the measurement of it in large area is mainly depending on remote sensing. In order to retrieve the storage volume of snow cover in an area with remote sensing, knowing the spectral feature is prerequisite. In the present paper, the Miyaluo district in northwest of Sichuan province was selected as the study area, twenty four measurement points were laid in study area, and the ASD FieldSpec Pro Ⅲ was selected as the spectral measurement instrument to collect the reflectance spectra of the snow on 21—22, January 2007. Then, the spectrum feature of the snow in the study area was analyzed. The result indicates that 1 026，1 256，1 493 and 1 990 nm are the characteristic absorption valleys, the snow reflectance on the surface has some relation with the snow depth, and also the snow reflectance varies with the depth in the study area.
Key words：Northwest of Sichuan province;Snow cover/snow melt;Spectrum measurement;Spectrum analysis
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