焦佳爽,张永志,尹鹏,南康康

• 1:长安大学地质工程与测绘学院

摘要(Abstract)：

针对青藏高原内陆地区存在的大范围未被合理解释的正质量变化信号问题,本文利用GRACE卫星观测资料定量研究了青藏高原北部地区2002—2015年间的地表质量变化趋势,并与水文模式和降水资料进行了比较分析。GRACE结果表明青藏高原北部地区存在等效水高为0.41cm/a的长期质量变化,水文模式得到的结果为0.12cm/a。长期信号显示两者虽在空间分布上存在较大差别,但在区域内具有相近极大值,且正信号均向研究区域的东南方向外延,体现出了较好的一致性。GRACE结果的周年振幅是水文模式的23%,这说明在研究区域内呈周期变化的土壤水信号并非是GRACE的优势信号,即水文模式无法给该研究区域质量长期变化以合理解释。此外,青藏高原北部地区的水文模式结果受降水影响较大。

关键词(KeyWords)： GRACE;青藏高原;质量变化;水文模式

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41374028);; 中央高校基本科研业务费项目(310826175018)

作者(Author): 焦佳爽,张永志,尹鹏,南康康

DOI: 10.16251/j.cnki.1009-2307.2018.07.008

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