Acta Geodaetica et Cartographica Sinica ›› 2016, Vol. 45 ›› Issue (1): 9-15.doi: 10.11947/j.AGCS.2016.20140447

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Independent Component Analysis of Water Storage Changes Interpretation over Tibetan Plateau and Its Surrounding Areas

WEN Hanjiang1, HUANG Zhenwei1, WANG Youlei1, LIU Huanling2, ZHU Guangbin3   

  1. 1. Chinese Academy of Surveying and Mapping, Beijing 100830, China;
    2. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;
    3. Satellite Surveying and Mapping Application Center, NASG, Beijing 101300, China
  • Received:2014-08-26 Revised:2015-07-01 Online:2016-01-20 Published:2016-01-28
  • Supported by:
    The National Basic Research Program of China(973 Program)(No.2013CB733302);The National Natural Science Foundation of China (Nos.41274031;41404014);Chinese Academy of Surveying and Mapping Fundamental Scientific Research Expenses (No.7771415)

Abstract: We first use the independent component analysis (ICA) method to decompose the water storage changes derived from 132 months (2003-01—2013-12) gravity recovery and climate experiment (GRACE) measurements, and then compare the results with those from NOAH and WGHM hydrological models. The comparison results of components show that the first principal components from the water storage changes and hydrological models agree well, and the correlation coefficients are 0.884 and 0.877 respectively. It shows that GRACE derived water storage changes and hydrological models over Tibetan Plateau and its surrounding areas have a strong consistency. For spatial pattern, the amplitudes of GRACE-derived water storage changes are larger than that of hydrological models, which may be caused by the groundwater changes included in the GRACE-derived water storage changes.

Key words: independent component analysis, water storage changes, GRACE, hydrological models

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