Chinese Journal of Polar Research

ADVANCES IN POLAR SCIENCE ›› 2014, Vol. 26 ›› Issue (2): 238-243.DOI: 10.13679/j.jdyj.2014.2.238

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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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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