| 尼泊尔Mw7.8地震对珠峰区域内冰川形变及流速的影响 |
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| 引用本文： | 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. |
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| 作者姓名： | 何正枫 张继贤 黄国满 盛辉军 |
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| 作者单位： | 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 |
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| 基金项目： | 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) |
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| 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。
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| 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 |
| 收稿时间： | 2021-02-22 |
| 修稿时间： | 2021-03-23 |
Influence of Nepal Mw7.8 earthquake on glacier deformation and velocity in the Everest region |
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| 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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| Authors: | HE Zhengfeng ZHANG Jixian HUANG Guoman SHENG Huijun |
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| 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. |
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| Keywords: | InSAR time-serise change offset-tracking glacier velocity Nepal earthquake |
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