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冰川冻土 ›› 2017, Vol. 39 ›› Issue (4): 733-740.doi: 10.7522/j.issn.1000-0240.2017.0083

• 冰冻圈与全球变化 • 上一篇    下一篇

2000-2014年祁连山西段老虎沟12号冰川高程变化

张其兵1,2, 康世昌2,3, 王晶4   

  1. 1. 湖南文理学院 资源环境与旅游学院, 湖南 常德 415000;
    2. 中国科学院 西北生态环境资源研究院 冰冻圈科学国家重点实验室, 甘肃 兰州 730000;
    3. 中国科学院 青藏高原地球科学卓越创新中心, 北京 100101;
    4. 湖南文理学院 土木建筑工程学院, 湖南 常德 415000
  • 收稿日期:2017-08-24 修回日期:2017-09-27 出版日期:2017-08-25 发布日期:2017-11-15
  • 作者简介:张其兵(1976-),男,安徽安庆人,讲师,2015年1月在中国科学院青藏高原研究所获博士学位,从事冰川遥感研究.E-mail:2391512238@qq.com.
  • 基金资助:
    国家自然科学基金(41671065);湖南文理学院博士启动项目(2015BSQD);冰冻圈科学国家重点实验室开放基金(SKLCS-OP-2016-11);洞庭湖生态经济区建设与发展湖南省协同创新中心项目资助

Elevation change of the Laohugou Glacier No.12 in the western Qilian Mountains from 2000 to 2014

ZHANG Qibing1,2, KANG Shichang2,3, WANG Jing4   

  1. 1. College of Resource Environment and Tourism, Hunan University of Arts and Science, Changde 415000, Hunan, China;
    2. State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
    3. Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China;
    4. School of Cival Engineering, Hunan University of Arts and Science, Changde 415000, Hunan, China
  • Received:2017-08-24 Revised:2017-09-27 Online:2017-08-25 Published:2017-11-15

摘要: 祁连山冰川自1990s以来持续萎缩,冰川融水径流变化对邻近的干旱区水资源产生重要影响。以往遥感与实测研究显示祁连山西段老虎沟12号冰川面积减少、末端退缩、运动速度降低及平衡线高度升高。为了进一步验证老虎沟12号冰川变化规律,利用高分辨率TerraSAR-X/TanDEM-X微波影像数据,与SRTM-C DEM进行差分干涉,得出老虎沟12号冰川2000-2014年高程年平均变化值为(-0.29±0.09)m·a-1。为了验证遥感观测结果,利用RTK-GPS对老虎沟12号冰川表面进行测高,并与SRTM-C DEM上相应点的高程值进行比较,计算测量点的高程年变化值,结果显示两种方法获得的年平均变化值之间具有很好的正相关性,表明利用TerraSAR-X/TanDEM-X微波影像数据及差分干涉技术监测祁连山冰川高程变化具有较好的可行性。

关键词: 冰川高程变化, 老虎沟12号冰川, 遥感, TerraSAR-X/TanDEM-X

Abstract: Glaciers in the Qilian Mountains have retreated since the 1990s, and the glacier ablation has great effect on the water resources in the arid Hexi corridor. The past studies based on remote sensing technology and field investigation has showed that the glacierized area had decreased, with terminus shrink upward, flow velocity slowing down and the equilibrium line altitude rising. In order to investigate the glacier elevation change by remote sensing technology, the interferometric phase of TerraSAR-X/TanDEM-X (TSX/TDX) subtracted the interferometric phase simulated from the co-registered SRTM-C DEM using the satellite geometry and baseline model of the TSX/TDX, the resulted differential interferometric synthetic aperture radar (DInSAR) phase was converted to the height difference. The thinning rate of the Laohugou Glacier No.12 had been (0.29±0.09) m·a-1 from 2000 to 2014. In an expedition in 2016, the elevation of the ablation area was measured using the Real Time Kinematic Global Position System (RTK-GPS), and the change in elevation was calculated via comparisons with the elevation of the matching points on the SRTM-C DEM acquired in 2000. These values were used to validate the DInSAR results and found a correlation coefficient of 0.6. The microwave remote sensing images of TerraSAR-X/TanDEM-X and differential interferometry technology can be applied to study glacier elevation change in the western Qilian Mountains.

Key words: glacier elevation change, Laohugou Glacier No.12, remote sensing, TerraSAR-X/TanDEM-X

中图分类号: 

  • P343.6