Three-Dimensional Monitoring of Zelongnong Glacier, China, with the PO-MSBAS Technique
High-precision monitoring of glacier motion provides crucial information for a thorough understanding of the dynamic characteristics and development patterns of glaciers, which serves as a scientific basis for the prevention and management of glacier-related disasters. Zelongnong Glacier, located in...
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MDPI AG
2024-11-01
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| author | Xinyi Zhai Chaoying Zhao Bin Li Wenpei Wang Xiaojie Liu |
| author_facet | Xinyi Zhai Chaoying Zhao Bin Li Wenpei Wang Xiaojie Liu |
| author_sort | Xinyi Zhai |
| collection | DOAJ |
| description | High-precision monitoring of glacier motion provides crucial information for a thorough understanding of the dynamic characteristics and development patterns of glaciers, which serves as a scientific basis for the prevention and management of glacier-related disasters. Zelongnong Glacier, located in Tibet, China, has experienced glacier surges, collapse, and hazard chains four times in the last 70 years. On 10 September 2020, a major glacier hazard chain occurred in this region. To reveal the influencing factors of the glacier motion, we monitor the Zelongnong Glacier motions with 65 scenes of TerraSAR/PAZ images from 2022 to 2023, where the Pixel Offset Multidimensional Small Baseline Subset (PO-MSBAS) method is employed for three-dimensional time series inversion. As the registration window size directly affects the matching success rate, deformation accuracy, and signal-to-noise ratio (SNR) during the offset tracking processing, we adopt a variable window-weighted cross-correlation strategy. The strategy balances the advantages of different window sizes, effectively reducing noise while preserving certain details in the offset results. The standard deviation in stable areas is also significantly lower than that obtained using smaller window sizes in conventional methods. The results reveal that the velocity of the southern glacier tributary was larger than the one in the northern tributary. Specifically, the maximum velocity in the northern tributary reached 45.07 m/year in the horizontal direction and −7.45 m/year in the vertical direction, whereas in the southern tributary, the maximum velocity was 50.15 m/year horizontally and 50.66 m/year vertically. The southern tributary underwent two bends before merging with the mainstream, leading to a more complex motion pattern. Lastly, correlation reveals that the Zelongnong Glacier was affected by the combined influence of temperature and precipitation with a common period of around 90 days. |
| format | Article |
| id | doaj-art-94653ce0c7fd478785666e7ff75c2a4e |
| institution | DOAJ |
| issn | 2072-4292 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
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| series | Remote Sensing |
| spelling | doaj-art-94653ce0c7fd478785666e7ff75c2a4e2025-08-20T02:50:40ZengMDPI AGRemote Sensing2072-42922024-11-011623446210.3390/rs16234462Three-Dimensional Monitoring of Zelongnong Glacier, China, with the PO-MSBAS TechniqueXinyi Zhai0Chaoying Zhao1Bin Li2Wenpei Wang3Xiaojie Liu4School of Geological Engineering and Geomatics, Chang’an University, Xi’an 710054, ChinaSchool of Geological Engineering and Geomatics, Chang’an University, Xi’an 710054, ChinaInstitute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, ChinaChina Institute of Geo-Environment Monitoring, China Geological Survey, Beijing 100081, ChinaSchool of Civil Engineering in Surveying and Mapping, Lanzhou University of Technology, Lanzhou 730050, ChinaHigh-precision monitoring of glacier motion provides crucial information for a thorough understanding of the dynamic characteristics and development patterns of glaciers, which serves as a scientific basis for the prevention and management of glacier-related disasters. Zelongnong Glacier, located in Tibet, China, has experienced glacier surges, collapse, and hazard chains four times in the last 70 years. On 10 September 2020, a major glacier hazard chain occurred in this region. To reveal the influencing factors of the glacier motion, we monitor the Zelongnong Glacier motions with 65 scenes of TerraSAR/PAZ images from 2022 to 2023, where the Pixel Offset Multidimensional Small Baseline Subset (PO-MSBAS) method is employed for three-dimensional time series inversion. As the registration window size directly affects the matching success rate, deformation accuracy, and signal-to-noise ratio (SNR) during the offset tracking processing, we adopt a variable window-weighted cross-correlation strategy. The strategy balances the advantages of different window sizes, effectively reducing noise while preserving certain details in the offset results. The standard deviation in stable areas is also significantly lower than that obtained using smaller window sizes in conventional methods. The results reveal that the velocity of the southern glacier tributary was larger than the one in the northern tributary. Specifically, the maximum velocity in the northern tributary reached 45.07 m/year in the horizontal direction and −7.45 m/year in the vertical direction, whereas in the southern tributary, the maximum velocity was 50.15 m/year horizontally and 50.66 m/year vertically. The southern tributary underwent two bends before merging with the mainstream, leading to a more complex motion pattern. Lastly, correlation reveals that the Zelongnong Glacier was affected by the combined influence of temperature and precipitation with a common period of around 90 days.https://www.mdpi.com/2072-4292/16/23/4462InSARPO-MSBASglacier motionthree dimensional time series monitoringTerraSAR/PAZ |
| spellingShingle | Xinyi Zhai Chaoying Zhao Bin Li Wenpei Wang Xiaojie Liu Three-Dimensional Monitoring of Zelongnong Glacier, China, with the PO-MSBAS Technique Remote Sensing InSAR PO-MSBAS glacier motion three dimensional time series monitoring TerraSAR/PAZ |
| title | Three-Dimensional Monitoring of Zelongnong Glacier, China, with the PO-MSBAS Technique |
| title_full | Three-Dimensional Monitoring of Zelongnong Glacier, China, with the PO-MSBAS Technique |
| title_fullStr | Three-Dimensional Monitoring of Zelongnong Glacier, China, with the PO-MSBAS Technique |
| title_full_unstemmed | Three-Dimensional Monitoring of Zelongnong Glacier, China, with the PO-MSBAS Technique |
| title_short | Three-Dimensional Monitoring of Zelongnong Glacier, China, with the PO-MSBAS Technique |
| title_sort | three dimensional monitoring of zelongnong glacier china with the po msbas technique |
| topic | InSAR PO-MSBAS glacier motion three dimensional time series monitoring TerraSAR/PAZ |
| url | https://www.mdpi.com/2072-4292/16/23/4462 |
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