尼泊尔Mw7.8地震对珠峰区域内冰川形变及流速的影响

doi:10.13474/j.cnki.11-2246.2021.0139

测绘通报 ›› 2021, Vol. 0 ›› Issue (5): 43-48,101.doi: 10.13474/j.cnki.11-2246.2021.0139

尼泊尔Mw7.8地震对珠峰区域内冰川形变及流速的影响

何正枫^1,2,3,4, 张继贤⁵, 黄国满⁴, 盛辉军^4,6

1. 兰州交通大学测绘与地理信息学院, 甘肃兰州 730070;
2. 地理国情监测技术应用国家地方联合工程研究中心, 甘肃兰州 730070;
3. 甘肃省地理国情监测工程实验室, 甘肃兰州 730070;
4. 中国测绘科学研究院, 北京 100830;
5. 国家测绘产品质量检验测试中心, 北京 100830;
6. 江苏海洋大学海洋技术与测绘学院, 江苏连云港 222005

收稿日期:2021-02-22 修回日期:2021-03-23 发布日期:2021-05-28
通讯作者: 张继贤。E-mail:zhangjx@casm.ac.cn
作者简介:何正枫(1994-),女,硕士生,主要研究方向为微波遥感、雷达干涉测量。E-mail:hezfyeah@163.com
基金资助:
珠峰高程测量项目(A2001);国家重点研发计划(2018YFF0215303);兰州交通大学优秀平台支持(201806)

Influence of Nepal Mw7.8 earthquake on glacier deformation and velocity in the Everest region

HE Zhengfeng^1,2,3,4, ZHANG Jixian⁵, HUANG Guoman⁴, SHENG Huijun^4,6

1. Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, China;
2. National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring, Lanzhou 730070, China;
3. Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Lanzhou 730070, China;
4. Chinese Acadcmy of Surveying & Mapping, Beijing 100830, China;
5. National Quality Inspection and Testing Center for Surveying and Mapping Products, Beijing 100830, China;
6. School of Marine Technology and Surveying and Mapping, Jiangsu Ocean University, Lianyungang 222005, China

Received:2021-02-22 Revised:2021-03-23 Published:2021-05-28

摘要/Abstract

摘要： 本文以L波段的ALOS PALSAR-2数据为基础,采用长时间序列InSAR技术对2014年9月至2019年8月的青藏高原区域进行动态监测,结合偏移量追踪法获取部分冰川在尼泊尔地震前后分别在距离向、方位向和水平方向的冰川流速分布结果。结果表明:在监测时段内,研究区普遍存在沉降现象,仅在个别年份出现小幅度的抬升,研究区最大年平均形变速率可达-203.1 mm/a,认为此次地震对研究区的时序观测结果的波动有特殊影响;在研究时期内部分冰川流速在地震后的相当长的一段时间内大幅度增加,最大速度可达2.645 m/d,认为地震是导致冰川流速急剧增加的原因之一。

关键词: 合成孔径雷达干涉测量技术, 长时间序列, 偏移量追踪法, 冰川流速, 尼泊尔地震

Abstract: Based on the L-band ALOS PALSAR-2 data, this paper uses time series InSAR technology to dynamically monitor the Tibetan Plateau from September 2014 to August 2019 and combines the offset tracking method to obtain the difference of the results of the glacier flow velocity distribution in the distance, azimuth and horizontal directions some glaciers before and after the Nepal earthquake. It is found that during the monitoring period, there is a general phenomenon of subsidence in the study area, only a small range of uplift occurs in a few years, and the maximum annual average deformation rate can be achieved -203.1 mm/a during the monitoring period. it is believed that the earthquake has a special impact on the fluctuation of the time series observation results in the study area; during the study period, the velocity of some glaciers increased during a long period of time after the earthquake, and the maximum velocity can reach 2.645 m/d, it is believed that earthquake is the cause of the rapid increase in glacier velocity.

Key words: InSAR, time-serise, change offset-tracking, glacier velocity, Nepal earthquake

中图分类号:

P237

何正枫, 张继贤, 黄国满, 盛辉军. 尼泊尔Mw7.8地震对珠峰区域内冰川形变及流速的影响[J]. 测绘通报, 2021, 0(5): 43-48,101.

HE Zhengfeng, ZHANG Jixian, HUANG Guoman, SHENG Huijun. Influence of Nepal Mw7.8 earthquake on glacier deformation and velocity in the Everest region[J]. Bulletin of Surveying and Mapping, 2021, 0(5): 43-48,101.

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尼泊尔Mw7.8地震对珠峰区域内冰川形变及流速的影响

Influence of Nepal Mw7.8 earthquake on glacier deformation and velocity in the Everest region

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