Articles | Volume 17, issue 2
https://doi.org/10.5194/tc-17-591-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-17-591-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
08 Feb 2023
Research article |
| 08 Feb 2023
| 08 Feb 2023
Lake volume and potential hazards of moraine-dammed glacial lakes – a case study of Bienong Co, southeastern Tibetan Plateau
Hongyu Duan
College of Geography and Environment Science, Northwest Normal
University, Lanzhou, 730070, China
Xiaojun Yao
CORRESPONDING AUTHOR
College of Geography and Environment Science, Northwest Normal
University, Lanzhou, 730070, China
Yuan Zhang
College of Geography and Environment Science, Northwest Normal
University, Lanzhou, 730070, China
Huian Jin
Gansu Forestry Polytechnic, Tianshui, 741020, China
Qi Wang
China Renewable Energy Engineering Institute, Power China, Beijing, 100038, China
Zhishui Du
Northwest Engineering Corporation Limited, Power China, Xi'an, 710065,
China
Jiayu Hu
College of Geography and Environment Science, Northwest Normal
University, Lanzhou, 730070, China
Bin Wang
Xinjiang Transport Planning Survey and Design Institute Company
Limited, Urumqi, 830006, China
Qianxun Wang
Capital Urban Planning and Design Consulting Development Company
Limited, Beijing, 100038, China
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The available remote-sensing data are increasingly abundant, and the efficient and rapid acquisition of glacier boundaries based on these data is currently a frontier issue in glacier research. In this study, we designed a complete solution to automatically extract glacier outlines from the high-resolution images. Compared with other methods, our method achieves the best performance for glacier boundary extraction in parts of the Tanggula Mountains, Kunlun Mountains and Qilian Mountains.
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In this study, first we generated inventories which allowed us to systematically detect glacier change patterns in the Karakoram range. We found that, by the 2020s, there were approximately 10 500 glaciers in the Karakoram mountains covering an area of 22 510.73 km2, of which ~ 10.2 % is covered by debris. During the past 30 years (from 1990 to 2020), the total glacier cover area in Karakoram remained relatively stable, with a slight increase in area of 23.5 km2.
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In this study, we presented a nearly complete inventory of glacier mass change dataset across the eastern Tibetan Plateau by using topographical maps, which will enhance the knowledge on the heterogeneity of glacier change before 2000. Our dataset, in combination with the published results, provide a nearly five decades mass balance to support hydrological simulation, and to evaluate the contribution of mountain glacier loss to sea level.
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The available remote-sensing data are increasingly abundant, and the efficient and rapid acquisition of glacier boundaries based on these data is currently a frontier issue in glacier research. In this study, we designed a complete solution to automatically extract glacier outlines from the high-resolution images. Compared with other methods, our method achieves the best performance for glacier boundary extraction in parts of the Tanggula Mountains, Kunlun Mountains and Qilian Mountains.
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For understanding the occurrence mechanism of surging glaciers in High Mountain Asia, it is essential to ascertain their amounts, distribution and periodicity. Based on images from Landsat satellite from 1986–2021, we identified 244 surging glaciers with high confidence and 2802 events of glacier surge. We also analyzed the periodicity of 36 glaciers which experienced two or more surges. The findings will benefit to enrich dataset and provide basic information of surging glaciers in HMA.
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Research on ice-dammed glacier lake outburst floods (GLOFs) tackles the growing global threat. Identifying field-based key factors and promoting and establishing a 95 % accurate empirical model unveils the relationship between lake volume and glacier surge, which controls lake size and level. Critical findings, including GLOF likelihood, triggering depth, and risk zones, provide insights for global early warning systems, highlighting the need to address cryospheric risks and protect communities.
Andreas Kääb and Luc Girod
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Following the detachment of the 130 × 106 m3 Sedongpu Glacier (south-eastern Tibet) in 2018, the Sedongpu Valley underwent massive large-volume landscape changes. An enormous volume of in total around 330 × 106 m3 was rapidly eroded, forming a new canyon of up to 300 m depth, 1 km width, and almost 4 km length. Such consequences of glacier change in mountains have so far not been considered at this magnitude and speed.
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Adrien Gilbert, Silvan Leinss, Jeffrey Kargel, Andreas Kääb, Simon Gascoin, Gregory Leonard, Etienne Berthier, Alina Karki, and Tandong Yao
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Short summary
We conducted a comprehensive investigation of Bienong Co, a moraine-dammed glacial lake on the southeastern Tibetan Plateau (SETP), to assess its potential hazards. The maximum lake depth is ~181 m, and the lake volume is ~102.3 × 106 m3. Bienong Co is the deepest known glacial lake with the same surface area on the Tibetan Plateau. Ice avalanches may produce glacial lake outburst floods that threaten the downstream area. This study could provide new insight into glacial lakes on the SETP.
We conducted a comprehensive investigation of Bienong Co, a moraine-dammed glacial lake on the...
