| Interannual and seasonal variation of flow velocity in Koxkar Baxi Glacier from 2014 to 2020北大核心CSCD |
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| 引用本文： | 赵晋彪,张震,许杨杨,王荣军,蒋宗立.Interannual and seasonal variation of flow velocity in Koxkar Baxi Glacier from 2014 to 2020北大核心CSCD[J].冰川冻土,2022,44(6):1730-1739. |
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| 作者姓名： | 赵晋彪 张震 许杨杨 王荣军 蒋宗立 |
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| 作者单位： | 1.安徽理工大学 空间信息与测绘工程学院，安徽 淮南 232001;2.安徽理工大学 矿山采动灾害空天地协同监测与预警安徽普通高校重点实验室，安徽 淮南 232001;3.安徽理工大学 矿区环境与灾害协同监测煤炭行业工程研究中心，安徽 淮南 232001;4.中国科学院 西北 生态环境资源研究院 冰冻圈科学国家重点实验室，甘肃 兰州 730000;5.湖南科技大学 地球科学与空间信息工程学院，湖南 湘潭 411201 |
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| 基金项目： | 国家自然科学基金项目(42071085);冰冻圈科学国家重点实验室开放基金项目(SKLCS 2020-10) |
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| 摘 要： | Glacier flow is a key factor in understanding the nature of glaciers, and it is also one of the main research contents of glacier dynamics, which can provide basic support for rational utilization of glacier resources and early warning of glacier disasters. There are many mountain glaciers located in the west of China. The study on the spatiotemporal variation of surface velocity of glaciers also has great significance for the social and economic development of the western China. Koxkar Baxi Glacier, locates on the southern slopes of the Tomur Peak, is a typical dendritic glacier. In order to obtain the conditions of Koxkar Baxi Glacier’flow rates and its variation to further reveal the future of the variation of glacier, the spatiotemporal variability of glacier velocity was surveyed using correlation(COSI-Corr)method on Landsat imagery from 2014 to 2020. The results show that: (1)The average annual flow velocity of the Koxkar Baxi Glacier was 0. 04~0. 05 m·d-1 during 2014 to 2020. (2)The glacier reaches its maximum flow velocity near the center part, and the velocity decreased towards both lateral margins. In a longitudinal profile, ice flow velocity in the accumulation area increased down to the equilibrium line, while decreased towards the glacier terminal. The maximum velocity with 0. 17~ 0. 20 m·d-1 was found near the equilibrium line altitude. (3)The glacier flow velocity in warm seasons were 16. 67% faster than that in cold seasons. (4)The glacier flow velocity from 2014 to 2020 showed a slight decreasing trend, and the average flow velocity decreased 0. 01 m·d-1. (5)Temperature and precipitation had certain influence on the seasonal fluctuation and interannual variation of the flow velocity of the glacier. © 2022 Science Press (China). All rights reserved.
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| 关 键 词： | 冰川运动速度 遥感影像 科其喀尔巴西冰川 影像互相关 时空变化 |
| 收稿时间： | 2022-03-05 |
| 修稿时间： | 2022-07-15 |
Interannual and seasonal variation of flow velocity in Koxkar Baxi Glacier from 2014 to 2020 |
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| Jinbiao ZHAO,Zhen ZHANG,Yangyang XU,Rongjun WANG,Zongli JIANG.Interannual and seasonal variation of flow velocity in Koxkar Baxi Glacier from 2014 to 2020[J].Journal of Glaciology and Geocryology,2022,44(6):1730-1739. |
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| Authors: | Jinbiao ZHAO Zhen ZHANG Yangyang XU Rongjun WANG Zongli JIANG |
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| Abstract: | Glacier flow is a key factor in understanding the nature of glaciers， and it is also one of the main research contents of glacier dynamics， which can provide basic support for rational utilization of glacier resources and early warning of glacier disasters. There are many mountain glaciers located in the west of China. The study on the spatiotemporal variation of surface velocity of glaciers also has great significance for the social and economic development of the western China. Koxkar Baxi Glacier， locates on the southern slopes of the Tomur Peak， is a typical dendritic glacier. In order to obtain the conditions of Koxkar Baxi Glacier’ flow rates and its variation to further reveal the future of the variation of glacier， the spatiotemporal variability of glacier velocity was surveyed using correlation （COSI-Corr） method on Landsat imagery from 2014 to 2020. The results show that： （1） The average annual flow velocity of the Koxkar Baxi Glacier was 0.04~0.05 m·d-1 during 2014 to 2020. （2） The glacier reaches its maximum flow velocity near the center part， and the velocity decreased towards both lateral margins. In a longitudinal profile， ice flow velocity in the accumulation area increased down to the equilibrium line， while decreased towards the glacier terminal. The maximum velocity with 0.17~0.20 m·d-1 was found near the equilibrium line altitude. （3） The glacier flow velocity in warm seasons were 16.67% faster than that in cold seasons. （4） The glacier flow velocity from 2014 to 2020 showed a slight decreasing trend， and the average flow velocity decreased 0.01 m·d-1. （5） Temperature and precipitation had certain influence on the seasonal fluctuation and interannual variation of the flow velocity of the glacier. |
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| Keywords: | glacier flow velocity remote sensing Koxkar Baxi Glacier image cross-correlation spatiotemporal variation |
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