| Glacier variations in the Caucasus Mountains from 1960 to 2020北大核心CSCD |
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| 引用本文： | 侯姗姗,王宁练,李志杰.Glacier variations in the Caucasus Mountains from 1960 to 2020北大核心CSCD[J].冰川冻土,2022,44(3):885-899. |
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| 作者姓名： | 侯姗姗 王宁练 李志杰 |
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| 作者单位： | 1.陕西省地表系统与环境承载力重点实验室，陕西 西安 710127;2.西北大学 城市与环境学院 地表系统与灾害研究院，陕西 西安 710127;3.中国科学院 青藏高原研究所，北京 100101 |
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| 基金项目： | 中国科学院战略性先导科技专项(XDA20060201);国家自然科学基金项目(42130516) |
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| 摘 要： | Glacial meltwater is an important freshwater resource in the Caucasus and is important for regional irrigation and hydroelectricity generation. This paper analyses the spatial and temporal patterns of glacier change in the Caucasus Mountains from 1960 to 2020 based on Landsat images, coherence images from Sentinel-1 image pairs, GLIMS glacier inventory and WGMS glacier mass balance data. The results of the study show that in 2020 there were 1912 glaciers in the Caucasus Mountains, with a total area of（1 087. 36±66. 44）km2. The total glacier area shrank by（587. 36±98. 66）km2（35. 07±5. 89%）between 1960 and 2020, with an average annual shrinkage rate of（0. 58±0. 10%）·a-1. The area shrinkage rates of Caucasian glaciers for 1960-1986, 1986-2000 and 2000-2020 are（0. 44±0. 20%）·a-1, （0. 66±0. 77%）·a-1 and（0. 96±0. 31%）·a-1, respectively, indicating that Caucasian glaciers in a state of accelerated retreat over the last 60 years. Analysis of mass balance information shows that both the Djankuat and Garabashi glaciers in the Caucasus have been in a strong negative equilibrium for nearly 60 years, with a significant acceleration of mass deficit after 2000. Analysis of climate data suggests that the strong warming is the main reason for the accelerated retreat of glaciers in the Caucasus mountains in recent decades. © 2022 The authors.
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| 关 键 词： | 高加索山脉 冰川变化 物质平衡 气候变化 |
| 收稿时间： | 2022-03-23 |
| 修稿时间： | 2022-05-21 |
Glacier variations in the Caucasus Mountains from 1960 to 2020 |
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| Shanshan HOU,Ninglian WANG,Zhijie LI.Glacier variations in the Caucasus Mountains from 1960 to 2020[J].Journal of Glaciology and Geocryology,2022,44(3):885-899. |
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| Authors: | Shanshan HOU Ninglian WANG Zhijie LI |
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| Institution: | 1.Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, Xi’an 710127, China;2.Institute of Earth Surface System and Hazards, College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, China;3.Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China |
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| Abstract: | Glacial meltwater is an important freshwater resource in the Caucasus and is important for regional irrigation and hydroelectricity generation. This paper analyses the spatial and temporal patterns of glacier change in the Caucasus Mountains from 1960 to 2020 based on Landsat images， coherence images from Sentinel-1 image pairs， GLIMS glacier inventory and WGMS glacier mass balance data. The results of the study show that in 2020 there were 1912 glaciers in the Caucasus Mountains， with a total area of （1 087.36±66.44） km2. The total glacier area shrank by （587.36±98.66） km2 （35.07±5.89%） between 1960 and 2020， with an average annual shrinkage rate of （0.58±0.10%）·a-1. The area shrinkage rates of Caucasian glaciers for 1960—1986， 1986—2000 and 2000—2020 are （0.44±0.20%）·a-1， （0.66±0.77%）·a-1 and （0.96±0.31%）·a-1， respectively， indicating that Caucasian glaciers in a state of accelerated retreat over the last 60 years. Analysis of mass balance information shows that both the Djankuat and Garabashi glaciers in the Caucasus have been in a strong negative equilibrium for nearly 60 years， with a significant acceleration of mass deficit after 2000. Analysis of climate data suggests that the strong warming is the main reason for the accelerated retreat of glaciers in the Caucasus mountains in recent decades. |
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| Keywords: | Caucasus Mountains glacier changes mass balance climate change |
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