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Proceedings Paper

Snow cover mapping over the Tibetan Plateau with MODIS and ASTER data
Author(s): Lina Xu; Ruiqing Niu; Yannan Zhao; Jiong Li; Ting Wu
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Paper Abstract

The Tibetan Plateau, called "the third pole" of the Earth by its highest altitude, is a very sensitive area for hydrological cycle and climatic change. To estimate and map the snow covered areas of the Tibetan Plateau is very important for the regional climatic change and hydrological cycle. The fractional snow cover of an image pixel is estimated with a linear mixture approach, where the reflectance of a "mixed" pixel is represented as sum of the reflectance of each pure land cover type weighted by their respective area proportion in the Instrument Field of View (IFOV). A method based on linear spectral unmixing using Moderate Resolution Imaging Spectroradiometer (MODIS) data in the Tibetan Plateau was presented and validated by Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) 15m data in this study. The change of the snow covers in the whole Tibetan Plateau was also analyzed. In the year of 2004 the area of the snow covers increased much from October to February of the following year. However, then declined to be a relatively small area until September of 2005. SRTM DEM data was applied to identify the relationship between snow distribution and terrain altitude.

Paper Details

Date Published: 9 October 2009
PDF: 8 pages
Proc. SPIE 7471, Second International Conference on Earth Observation for Global Changes, 747115 (9 October 2009); doi: 10.1117/12.836457
Show Author Affiliations
Lina Xu, China Univ. of Geosciences (China)
Wuhan Univ. (China)
Ruiqing Niu, China Univ. of Geosciences (China)
Yannan Zhao, China Univ. of Geosciences (China)
Jiong Li, China Univ. of Geosciences (China)
Ting Wu, China Univ. of Geosciences (China)


Published in SPIE Proceedings Vol. 7471:
Second International Conference on Earth Observation for Global Changes
Xianfeng Zhang; Jonathan Li; Guoxiang Liu; Xiaojun Yang, Editor(s)

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