Science Service System

Summary of Proposal HYD2824

TitleIdentifying spatial-temporal patterns of glacier changes in the High Mountain Asia with TerraSAR-X data
Investigator Liming, Jiang - Chinese Academy of Sciences, Institute of Geodesy and Geophysics
Team Member
Prof. Lin, Hui - The Chinese University of Hong Kong, Institute of Space and Earth Information Science
Prof. Yi, Chaolu - Chinese Academy of Sciences, Institute of Tibetan Plateau Research
Prof. Chen, Fulong - Chinese Academy of Sciences, Institute of Remote Sensing and Digital Earth
Prof. Shen, Qiang - Chinese Academy of Sciences, Institute of Geodesy and Geophysics
Dr. Liu, Lin - Chinese Academy of Sciences, Institute of Geodesy and Geophysics
Dr. Li, Gang - The Chinese University of Hong Kong, Institute of Space and Earth Information Science
Dr. Sun, Yongling - Chinese Academy of Sciences, Institute of Geodesy and Geophysics
SummaryChanges of glaciers in High Mountain Asia seriouslyaffect the water supply of large Asian rivers like Ganges and Indus and thelivelihood of people who live in the catchments of these rivers. Therefore,monitoring variation of glacier area and velocity which are two fundamentalproxies to characterize the glacier status is necessary and required. Satelliteradar or optical remote sensing have been proven to be an effective means ofdetecting glacier outline and ice flow velocity with high accuracy. As anew-generation SAR sensor, TerraSAR-X can be operated in different modes andpolarizations, and provide high resolution SAR images for detailed analysis. Inthis project, we select several typical glacier regions in High Mountain Asia asour study regions. The primary research objective is to scientifically evaluatepotential of TerraSAR-X data used in monitoring glacier changes in High MountainAsia. Furthermore, we attempt to develop a method to estimate long-time recordsof glacier outlines and areas by synergistic use of optical feature information(i.e. multi-spectrum images) and SAR feature information (i.e. intensity,coherence and polarization images). In addition, an optimized technique ofglacier velocity calculation will be developed by applying a combination of SARinterferometric, speckle-tracking and optical cross-correlation algorithms. Finally,these records of glacier area and velocity will be assessed with fieldmeasurements and organized in chronology order to identify and analyze the spatial-temporalpatterns of glacier changes. It is expected that this study will provide a moredetailed and high-accurate picture of glacier status in the High Mountain Asia.

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DLR 2004-2016