测绘学报 ›› 2016, Vol. 45 ›› Issue (1): 9-15.doi: 10.11947/j.AGCS.2016.20140447

• 大地测量学与导航 • 上一篇    下一篇

青藏高原及其周边地区水储量变化的独立成分分析

文汉江1, 黄振威1, 王友雷1, 刘焕玲2, 朱广彬3   

  1. 1. 中国测绘科学研究院, 北京 100830;
    2. 武汉大学测绘学院, 湖北 武汉 430079;
    3. 国家测绘地理信息局卫星测绘应用中心, 北京 101300
  • 收稿日期:2014-08-26 修回日期:2015-07-01 出版日期:2016-01-20 发布日期:2016-01-28
  • 作者简介:文汉江(1966—),男,研究员,博士生导师,研究方向为卫星重力、卫星测高等。
  • 基金资助:
    国家973计划(2013CB733302);国家自然科学基金(41274031;41404014);中国测绘科学研究院基本科研业务费(7771415)

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)

摘要: 采用2003年1月至2013年12月共132个月的GRACE卫星数据反演得到的水储量变化信息,利用独立成分分析方法将水储量变化信息分解成多个信号成分,然后与NOAH和WGHM两个水文模型的分析结果进行比较。成分对比结果表明,GRACE反演得到的水储量变化与NOAH和WGHM水文模型在第一个主成分方面符合很好,相关系数分别是0.884和0.877。说明GRACE反演的水储量变化和水文模型在青藏高原及其周边区域具有很强的一致性。从空间模式上看,GRACE反演水储量变化信号的强度比水文模型信号要大,可能与GRACE反演的水储量变化还包括地下水的变化情况等有关。

关键词: 独立成分分析, 水储量变化, GRACE, 水文模型

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

中图分类号: