珠峰及周边地区强震影响垂直形变特征研究

党亚民, 程传录, 杨强, 蒋光伟, 孙洋洋

党亚民, 程传录, 杨强, 蒋光伟, 孙洋洋. 珠峰及周边地区强震影响垂直形变特征研究[J]. 武汉大学学报 ( 信息科学版), 2022, 47(1): 26-35. DOI: 10.13203/j.whugis20210545
引用本文: 党亚民, 程传录, 杨强, 蒋光伟, 孙洋洋. 珠峰及周边地区强震影响垂直形变特征研究[J]. 武汉大学学报 ( 信息科学版), 2022, 47(1): 26-35. DOI: 10.13203/j.whugis20210545
DANG Yamin, CHENG Chuanlu, YANG Qiang, JIANG Guangwei, SUN Yangyang. Vertical Deformation Characteristics Affected by Strong Earthquakes in Mount Qomolangma and Surrounding Areas[J]. Geomatics and Information Science of Wuhan University, 2022, 47(1): 26-35. DOI: 10.13203/j.whugis20210545
Citation: DANG Yamin, CHENG Chuanlu, YANG Qiang, JIANG Guangwei, SUN Yangyang. Vertical Deformation Characteristics Affected by Strong Earthquakes in Mount Qomolangma and Surrounding Areas[J]. Geomatics and Information Science of Wuhan University, 2022, 47(1): 26-35. DOI: 10.13203/j.whugis20210545

珠峰及周边地区强震影响垂直形变特征研究

基金项目: 

国家自然科学基金 41974010

中国测绘科学研究院基本科研业务费 AR2004

详细信息
    作者简介:

    党亚民,博士,研究员,主要研究方向为大地测量基准与地球动力学。dangym@casm.ac.cn

    通讯作者:

    杨强,博士,副研究员。yangqiang@casm.ac.cn

  • 中图分类号: P228

Vertical Deformation Characteristics Affected by Strong Earthquakes in Mount Qomolangma and Surrounding Areas

Funds: 

The National Natural Science Foundation of China 41974010

the Fundamental Scientific Research Funds of Chinese Academy of Surveying and Mapping AR2004

More Information
    Author Bio:

    DANG Yamin, PhD, professor, majors in geodetic datum and geodynamics. E-mail: dangym@casm.ac.cn

    Corresponding author:

    YANG Qiang, PhD, associate professor. E-mail: yangqiang@casm.ac.cn

  • 摘要: 2015年尼泊尔地震对珠穆朗玛峰高程的影响,近年一直受到全世界关注。2020年珠穆朗玛峰高程测量在珠穆朗玛峰及周边地区布设了高精度的全球导航卫星系统(global navigation satellite system, GNSS)形变监测网,收集了1999—2020年跨喜马拉雅山脉的32个连续运行参考站(continuously operating reference stations, CORS)的GNSS连续观测数据。利用GNSS数据监测了珠穆朗玛峰周边地区地壳三维形变特征,定量获取了2015年尼泊尔强震对珠穆朗玛峰周边CORS同震位移,以及地震对区域地壳三维形变长期趋势的影响,特别是对该地区垂直形变的影响。研究结果表明,该区域地壳垂直形变由南至北跨喜马拉雅山脉呈明显的阶梯型分布特征;震后印度板块与欧亚板块存在加速汇聚趋势,导致震后地壳隆升速率同步增大。
    Abstract:
      Objectives  The impact of the 2015 Nepal earthquake on the height of Mount Qomolangma has attracted worldwide attention in recent years. 2020 height measurement of Mount Qomolangma has set up a high-precision GNSS(global navigation satellite system) deformation monitoring network in Mount Qomolangma and its surrounding areas. In addition, we have collected the GNSS observation datum of 32 CORS(continuously operating reference stations) across the Himalayas during 1999 to 2020.
      Methods  We monitor the three-dimensional crustal deformation characteristics of Mount Qomolangma and surrounding areas, and quantitatively obtained the co-seismic displacement of the CORS around the Mount Qomolangma of the 2015 Nepal earthquake, as well as the impact of the earthquake on the long-term trend of regional three-dimensional crustal deformation, especially on the vertical deformation in this region.
      Results  The results show that the vertical crustal deformation in this area has obvious stepped distribution characteristics from south to north across the Himalayas. After the earthquake, there was an accelerated convergence trend between the Indian plate and the Eurasian plate, which led to the synchronous increase of the crustal uplift rate after the earthquake.
      Conclusions  The crustal rise in Mount Qomolangma and surrounding areas is the main trend. The 2015 Nepal earthquake caused the crustal decline in a short time, but did not change the long-term uplift trend.
  • 致谢: 感谢自然资源部第一大地测量队提供的2005年和2020年两次珠峰高程测量区域监测网GNSS数据,中国大陆构造环境监测网络提供的西藏CORS观测数据,美国卫星导航系统与地壳形变观测研究大学联合体提供的尼泊尔CORS观测数据;感谢GAMIT/GLOBK软件和GMT软件团队。
  • 图  1   CORS分布

    Figure  1.   Distribution of CORS

    图  2   CORS高程分布

    Figure  2.   Elevation Distribution of CORS

    图  3   CORS单天解时序

    Figure  3.   Time Series of CORS

    图  4   地震同震位移较大的站点

    Figure  4.   Stations with Large Coseismic Displacement

    图  5   在ITRF2014框架下CORS三维运动速率

    Figure  5.   3D Velocities of CORS in ITRF2014

    图  6   1999—2020年相对于位于印度板块和欧亚板块上的IGS站的垂直形变

    Figure  6.   Vertical Deformation Relative to Indian Plate and Eurasian Plate from 1999 to 2020

    图  7   CORS同震位移

    Figure  7.   Coseismic Displacement of CORS

    图  8   2015年尼泊尔地震前后CORS水平和垂直方向速率差异

    Figure  8.   Velocities Difference of Horizontal and Vertical Directions of CORS Before and After 2015 Nepal Earthquake

    图  9   2015年尼泊尔地震前后CORS N、E和高程方向运动速率差异

    Figure  9.   Velocities Difference of N, E and Height Directions of CORS Before and After the 2015 Nepal Earthquake

    图  10   1999—2015年应变率场(箭头表示主应变率)

    Figure  10.   Strain Rate Field of 1999 to 2015 (Arrow Indicates the Principal Strain Rate)

    图  11   2015-2020年应变率场

    Figure  11.   Strain Rate Field of 2015 to 2020

    图  12   2020年与2005年珠峰高程测量重合点高程差异

    Figure  12.   Elevation Difference of Coincidence Points of Everest Elevation Survey in 2020 and 2005

    表  1   单天解基线解算设置

    Table  1   Settings of Baseline Resolution

    参数 处理方式
    基线处理模式 RELAX
    观测值 LC+PC组合
    坐标框架 ITRF2014
    对流层延迟 GMF
    海潮改正 otl_FES2004
    固体潮模型 IERS2010
    光压模型 BERNE
    下载: 导出CSV
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  • 收稿日期:  2021-10-11
  • 发布日期:  2022-01-04

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