Monitoring elevation change of glaciers on Geladandong Mountain using TanDEM-X SAR interferometry Monitoring elevation change of glaciers on Geladandong Mountain using TanDEM-X SAR interferometry

最小化 最大化

Vol14 No.5: 859-869

Title】Monitoring elevation change of glaciers on Geladandong Mountain using TanDEM-X SAR interferometry

Author】LIU Guang 1*; FAN Jing-hui2; ZHAO Feng3; MAO Ke-biao4

Addresses】1 Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100094, China; 2 China Aero Geophysical Survey & Remote Sensing Center for Land and Resources, Beijing 100083, China; 3 School of Instrumentation Science and Opto-electronics Engineering, Beihang University, Beijing 100191, China; 4 Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China

Corresponding author】liuguang@radi.ac.cn

Citation】Liu G, Fan JH, Zhao F, et al. (2017) Monitoring elevation change of glaciers on Geladandong Mountain using TanDEM-X SAR interferometry. Journal of Mountain Science 14(5). DOI: 10.1007s11629-016-3992-5

DOI】10.1007s11629-016-3992-5

Abstract】Glaciers play an important role in the climate system. The elevation change of a glacier is an important parameter in studies of glacier dynamics. Only a few ground-based measurements of high mountain glaciers are available due to their remoteness, high elevation, and complex topography. The acquisition from the German TanDEM-X (TerraSAR-X add-on for Digital Elevation Measurement) SAR imaging configuration provides a reliable data sources for studying the elevation change of glaciers. In this study, the bistatic TanDEM-X data that cover the Geladandong Mountain on the Tibetan Plateau were processed with SAR interferometry technique and the elevation changes of the mountain's glaciers during 2000–2014 were obtained. The results indicated that although distinct positive and negative elevation changes were found for different glacier tongues, the mean elevation change was about -0.14±0.26 m a-1. Geoscience Laser Altimeter System (GLAS) data were obtained for comparison and verification. The investigation using GLAS data demonstrated the efficacy of the proposed method in determining glacier elevation change. Thus, the presented approach is appropriate for monitoring glacier elevation change and it constitutes a valuable tool for studies of glacier dynamics.

Keywords】Elevation change; Glacier; Synthetic aperture radar interferometry; TanDEM-X; Geladandong mountain;Tibetan Plateau