Snow, Ice and Environment Over the Tibetan Plateau Zone I Versions ZH2
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A dataset of glacier surface motion distribution in Qinghai-Tibet Plateau region during 2019–2020 with GF-3 imagery
Dataset URL >>
: 2021 - 05 - 07
: 2021 - 05 - 14
: 2021 - 05 - 14
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Abstract & Keywords
Abstract: The Qinghai-Tibet Plateau, also known as the world’s “Third Pole”, is the largest modern glaciation region in the middle and low latitudes of the Northern Hemisphere, which plays an important role in the global climate system. It is of great significance to study the spatiotemporal changes of the glacier velocity for understanding the dynamic characteristics of glaciers and demonstrate the response of glaciers to climate change. Besides, the long-term monitoring of glacier activity on the Qinghai-Tibet Plateau is essential to promote ecological environment protection. Based on the SAR imagery of the Qinghai-Tibet Plateau region acquired by GF-3 from 2019 to 2020 along with an improved pixel-tracking algorithm, the distribution of ice surface motion is obtained. The accurate velocity of the glacier surface (GeoTiff format in 32-bit floating-point) was extracted by precisely removing the global deformation, the topographic-related offset and the effect of the high-frequency noise. And the spatial resolution of the final result is around 12 m by sampling interval of GF-3 with FSI imaging mode. An overall accuracy of about 0.5 m is given by the statistical analysis of the residual movement in the non-glacial region. The results demonstrate that the glacier velocity in the accumulation area is generally faster than that in the terminal or ablation part, some small and medium-sized glaciers have relatively strong activities. Generally, the ice velocity reveals a positive correlation with topography and climate. The dataset could serve as the basis in research of glacial mass balance in Qinghai-Tibet Plateau, providing statistical support to understand the relationship between ice and climate change in High Mountain Asia. Finally, this study could promote the application of domestic remote sensing data in glacier activity and climate change on a deeper level.
Keywords: Qinghai-Tibet Plateau; GF-3;; ice surface motion;  pixel-tracking
Dataset Profile
TitleA dataset of glacier surface motion distributionin Qinghai-Tibet Plateau region during 20192020 with GF-3 imagery
Data corresponding authorYAN Shiyong (yanshiyong@cumt.edu.cn)
Data author(s)ZHANG Qimin, LYU Mingyang, YAN Shiyong
Time range20192020
Geographical scopeGeographical scope 26°N–44°N, 70°E–100°E. Including: Hengduan Mountains, Himalaya Mountains, Tianshan Mountains and Pamirs regions.
Spatial resolution12m
Data volume5.85GB
Data format*.tif(GeoTIFF,32-bit float)
Data service system<http://www.sciencedb.cn/dataSet/handle/j00001.00253>
Source of fundingOpen Research Fund of National Earth Observation Data Center (No. NODAOP2020010)
Dataset compositionThe dataset consists of two data files: “Glacier Velocity” stores data of glacier surface velocity, and “Glacier Motion” stores of glacier displacement.
Article and author information
Zhang Qimin
主要承担工作:数据筛选,数据处理,论文撰写。
Lyu Mingyang
主要承担工作:数据筛选,论文撰写与修改。
Yan Shiyong
主要承担工作:SAR 数据处理整体方案设计,论文修改。
yanshiyong@cumt.edu.cn
Publication records
Released: May 14, 2021 ( VersionsZH2
References
中国科学数据
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