极地研究

极地研究 ›› 2014, Vol. 26 ›› Issue (2): 238-243.DOI: 10.13679/j.jdyj.2014.2.238

• 研究论文 • 上一篇    下一篇

联合GNSS和GRACE数据分析南极跟踪站的径向形变

李伟伟1,2  鞠晓蕾1,2   沈云中1,2  张子占3   

  1.  
    1同济大学测绘与地理信息学院，上海  200092;
    2同济大学空间信息科学与及可持续发展应用中心，上海  200092;
    3中国科学院测量与地球物理研究所大地测量与地球动力学国家重点实验室，湖北 武汉  430077
  • 收稿日期:2013-03-26 修回日期:2013-07-25 出版日期:2014-06-30 发布日期:2014-06-30
  • 通讯作者: 李伟伟
  • 基金资助:

    国家重点基础研究计划;国家自然科学基金“行星冲击产生的高温高压相变反应：月球火星陨石中后成合晶的研究”

VERTICAL DEFORMATION ANALYSIS OF ANTARACTIC GNSS　STATIONS COMBINED USING GNSS AND GRACE DATA

Li Weiwei1, 2, Ju Xiaolei1, 2, Shen Yunzhong1, 2, Zhang Zizhan3   

  1.  
    1 College of Surveying and Geo-Informatics, Tongji University, Shanghai 200092, China;
    2 Center for Spatial Information Science and Sustainable Development, Shanghai 200092, China;
    3 State Key Laboratory of Geodesy and Earth's Dynamics, Institute of Geodesy and Geophysics, CAS, Wuhan 430077, China
  • Received:2013-03-26 Revised:2013-07-25 Online:2014-06-30 Published:2014-06-30
  • Contact: Wei-wei LI

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摘要： 本文利用南极大陆12个累积观测数据超过3年的GNSS跟踪站的监测序列，比较分析了其径向的形变趋势与GIA（Glacial Isostatic Adjustment）模型预测形变，并且与GRACE(Gravity Recovery and Climate Experiment)估计的径向位移结果进行相关性分析。GNSS结果显示跟踪站的径向形变多呈现上升趋势，少量出现下降的跟踪站多分布在东南极沿海区域，下降速度较小。与GRACE计算结果相比，两者的相关系数在0.241—0.663之间，表明两种观测手段得到的结果总体呈现较强的相关性。GNSS 形变趋势与最新的GIA 模型(W12a)预测形变趋势有一定的偏差，但总体吻合。

关键词: 南极大陆, GNSS监测序列, GRACE, 径向形变, 相关性, GIA

Abstract: The GNSS monitoring time series of 12 GNSS stations in Antarctica, each of which spans no less than 3 years, are analyzed to get their vertical deformations, and the results are compared with those predicted by GIA (Glacial Isostatic Adjustment). Besides, the correlations between GNSS and GRACE (Gravity Recovery and Climate Experiment) data are also computed. The results derived from GNSS data show that the vertical deformations of most stations are on the rise, and the stations with slowly descending rate locate along the coast of East Antarctica. The vertical deformations derived respectively from GNSS and GRACE data are significantly correlated with the correlation coefficients from 0.241 to 0.663. Although the biases exist in GNSS estimated deformation trend and GIA predicted trend, they are coincide with each other overall.

Key words: Antarctica, GNSS monitoring time series, GRACE, Vertical deformation, Correlation, GIA