光谱学与光谱分析 |
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Spectral Features Analysis of Sea Ice in the Arctic Ocean |
KE Chang-qing1, XIE Hong-jie2, LEI Rui-bo3, LI Qun3, SUN Bo3 |
1. School of Geography and Oceanography, Nanjing University, Nanjing 210093, China 2. Department of Geological Sciences, University of Texas at San Antonio, Texas 78249, USA 3. Polar Research Institute of China, Shanghai 200136, China |
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Abstract Sea ice in the Arctic Ocean plays an important role in the global climate change, and its quick change and impact are the scientists’ focus all over the world. The spectra of different kinds of sea ice were measured with portable ASD FieldSpec 3 spectrometer during the long-term ice station of the 4th Chinese national Arctic Expedition in 2010, and the spectral features were analyzed systematically. The results indicated that the reflectance of sea ice covered by snow is the highest one, naked sea ice the second, and melted sea ice the lowest. Peak and valley characteristics of spectrum curves of sea ice covered by thick snow, thin snow, wet snow and snow crystal are very significant, and the reflectance basically decreases with the wavelength increasing. The rules of reflectance change with wavelength of natural sea ice, white ice and blue ice are basically same, the reflectance of them is medium, and that of grey ice is far lower than natural sea ice, white ice and blue ice. It is very significant for scientific research to analyze the spectral features of sea ice in the Arctic Ocean and to implement the quantitative remote sensing of sea ice, and to further analyze its response to the global warming.
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Received: 2011-08-08
Accepted: 2011-11-10
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Corresponding Authors:
KE Chang-qing
E-mail: kecq@nju.edu.cn
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