Kinematic inventory of rock glaciers in the Nyainqentanglha Range using the MT-InSAR method  

作　　者：Xuefei Zhang Min Feng Jinhao Xu Dezhao Yan Jing Wang Xiaoqing Zhou Tao Li Xiang Zhang 

机构地区：[1]Land Satellite Remote Sensing Application Center,Ministry of Natural Resources,Beijing,People’s Republic of China [2]Tibetan Plateau Data Center,State Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing,People’s Republic of China [3]Academy of Plateau Science and Sustainability,Qinghai Normal University,Xining,People’s Republic of China [4]University of Chinese Academy of Sciences,Beijing,People’s Republic of China [5]Research Institute of Intelligent Computing,Zhejiang Laboratory,Hangzhou,People’s Republic of China

出　　处：《International Journal of Digital Earth》2023年第1期3923-3948,共26页国际数字地球学报（英文）

基　　金：funded by the National Natural Science Foundation of China[grant number 4217011817];State Key Laboratory of Tibetan Plateau Earth System Environment and Resources(TPESER)Youth Innovation Key Program[grant number TPESER-QNCX2022ZD-04].

摘　　要：Rock glaciers are typical periglacial landforms with tongue or lobate morphological shapes and characterized by the distinct front,lateral margins,and often by ridge-and-furrow surface topography textures as well as kinematic characteristics,widely distributed in alpine environments.Multitemporal Synthetic aperture radar interferometry(MT-InSAR),is a remote sensing technique with demonstrated effectiveness for detecting landform kinematics.However,its application to rock glaciers is challenged by temporal decorrelation and atmospheric phase noises due to complex topography and snow cover.We designed a quadtree segmentation and parallel computing-based MT-InSAR method to improve the quality and efficiency of deformation measurement of rock glaciers.We applied the method to a rock glacier inventory of the Nyainqentanglha Range,China,derived from high-resolution Gaofen-2 images,to quantify the activity rate of each rock glacier.Results showed that 32.1%(6,389)of the identified rock glaciers exhibited slope-parallel deformation rates exceeding 100 mm/y.The activities of the rock glaciers exhibited strong correlations with their distance to glaciers,precipitation,freeze-thaw magnitude,and permafrost occurrence probability.The results demonstrate the effectiveness of the developed segmentation-parallel MT-InSAR method for monitoring rock glacier deformation over a large region.

关 键 词：Rock glacier MT-InSAR quadtree segmentation Nyaingentanglha KINEMATICS 

分 类 号：TG1[金属学及工艺—金属学]