双站InSAR和ICESat-2测高相结合的西昆仑山近20年冰川物质平衡变化监测

doi:10.11947/j.AGCS.2023.20210213

测绘学报 ›› 2023, Vol. 52 ›› Issue (6): 917-931.doi: 10.11947/j.AGCS.2023.20210213

双站InSAR和ICESat-2测高相结合的西昆仑山近20年冰川物质平衡变化监测

李涛^1,2, 李超¹, 沈翔¹, 江利明^1,2, 汪汉胜¹, 李刚³, 林珲⁴

1. 中国科学院精密测量科学与技术创新研究院大地测量与地球动力学国家重点实验室, 湖北武汉 430077;
2. 中国科学院大学, 北京 100049;
3. 中山大学测绘科学与技术学院, 广东珠海 519000;
4. 江西师范大学地理与环境学院, 江西南昌 330027

收稿日期:2021-04-26 修回日期:2023-03-13 发布日期:2023-07-08
通讯作者: 江利明 E-mail:jlm@whigg.ac.cn
作者简介:李涛(1998-),女,硕士,研究方向为利用卫星激光测高与DEM等技术监测冰面高程变化。E-mail:lilitao@apm.ac.cn
基金资助:
国家自然科学基金(42174046;42171443);国家重点研发计划(2017YFA0603103);第二次青藏高原综合科学考察研究(No. 2019QZKK0905);中国科学院A类战略性先导科技专项(XDA19070104)

Monitoring glacier mass balance of the West Kunlun Mountains over the past 20 years by bistatic InSAR and ICESat-2 altimetry measurements

LI Tao^1,2, LI Chao¹, SHEN Xiang¹, JIANG Liming^1,2, WANG Hansheng¹, LI Gang³, LIN Hui⁴

1. State Key Laboratory of Geodesy and Earth's Dynamics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430077, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. School of Geospatial Engineering and Science, Sun Yat-Sen University, Zhuhai 519000, China;
4. School of Geography and Environment, Jiangxi Normal University, Nanchang 330027, China

Received:2021-04-26 Revised:2023-03-13 Published:2023-07-08
Supported by:
The National Natural Science Foundation of China (Nos. 42174046; 42171443); The National Key Research and Development Program of China (No. 2017YFA0603103); The Second Tibetan Plateau Scientific Expedition and Research (STEP) Program (No. 2019QZKK0905); The Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDA19070104)

摘要/Abstract

摘要： 山地冰川物质平衡是研究冰川变化的重要参数。自21世纪初,全球气候变暖背景下大部分山地冰川消融加速,而青藏高原西昆仑山冰川却呈现稳定甚至冰量增加趋势,被认为是“喀喇昆仑异常”的中心,但该地区近年来冰量变化是否仍延续正平衡趋势还存在一些争论。因此,本文利用新近发布的ICESat-2卫星测高和TanDEM-X 90m DEM数据,定量估算了2013—2019年间西昆仑山冰川厚度变化和物质平衡,并结合SRTM DEM、冰流速资料和Landsat光学影像分别分析了该地区近20 a冰川物质平衡变化趋势、冰川跃动情况和冰川面积变化。结果表明:①2013—2019年间,西昆仑山大部分冰川仍处于积累或平衡状态,物质积累速率为0.228±0.055 m w.e./a;②近20 a内,冰川整体呈正平衡趋势,但2013—2019年冰川物质年均积累速率大于2000—2013年(0.173±0.014 m w.e./a);③2013年后,冰川跃动仍广泛分布,发现5Y641F0046冰川首次发生跃动,西昆仑冰川东支和5Y641F0073冰川近20 a内一直处于活跃期,中峰冰川由2013年前的活跃状态转为静止且冰量开始增加。

关键词: ICESat-2, 双站InSAR, 西昆仑山, 冰川物质平衡, 冰川跃动

Abstract: The ice mass balance of mountain glaciers is an important parameter of glacier changes research. Since the beginning of the 21st century, ice melting of most mountain glaciers has accelerated accompanying climate warming, but glaciers over the West Kunlun Mountains in the Qinghai-Tibet Plateau have shown a trend of stability and even an increase in ice mass, which is considered as the center of the “Karakoram anomaly”. However, there are still some debates about whether the ice mass changes in this region are still accumulated in recent years. Therefore, this paper uses the newly released ICESat-2 satellite altimetry and TanDEM-X 90m DEM data to quantitatively estimate the ice thickness changes and mass balance of the glaciers in the West Kunlun Mountains from 2013 to 2019. Moreover, the mass changes during the past 20 years, glacier surges and area changes were also analyzed with SRTM DEM, ice velocity data and Landsat images. The results show that: ① From 2013 to 2019, most of the glaciers over the West Kunlun Mountains still showed accumulation or stability, with the mass balance of 0.228±0.055 m w.e./a; ② Over the past 20 years, the glaciers have shown a positive trend in total, but the mass accumulation rate during 2013—2019 was higher than that in 2000—2013 (0.173±0.014 m w.e./a); ③ Glacier surges were still widely distributed after 2013. It was found that the 5Y641F0046 Glacier surged for the first time. The eastern branch of the West Kunlun Glacier and the 5Y641F0073 Glacier have been in an active phase for the past 20 years. The Zhongfeng Glacier changed from an active phase before 2013 to a quiescent phase and showed a trend of mass accumulation.

Key words: ICESat-2, bistatic InSAR, West Kunlun Mountains, glacier mass balance, glacier surging

中图分类号:

P227

李涛, 李超, 沈翔, 江利明, 汪汉胜, 李刚, 林珲. 双站InSAR和ICESat-2测高相结合的西昆仑山近20年冰川物质平衡变化监测[J]. 测绘学报, 2023, 52(6): 917-931.

LI Tao, LI Chao, SHEN Xiang, JIANG Liming, WANG Hansheng, LI Gang, LIN Hui. Monitoring glacier mass balance of the West Kunlun Mountains over the past 20 years by bistatic InSAR and ICESat-2 altimetry measurements[J]. Acta Geodaetica et Cartographica Sinica, 2023, 52(6): 917-931.

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双站InSAR和ICESat-2测高相结合的西昆仑山近20年冰川物质平衡变化监测

Monitoring glacier mass balance of the West Kunlun Mountains over the past 20 years by bistatic InSAR and ICESat-2 altimetry measurements

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