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测绘学报  2013 

CRUST2.0模型在均衡位模型构建中的应用研究

, PP. 640-647

Keywords: 均衡理论,CRUST,2.0,均衡位模型,补偿深度,地球重力场模型

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Abstract:

基于均衡理论构制地球重力场模型中一个关键问题是扰动质量的确定,不同的地壳密度分布将得到不同的扰动质量。本文立足于面凝聚模型和Airy模型两种均衡补偿机制,研究了CRUST2.0全球地壳模型在构制高分辨率地球重力场模型中的应用,推导了顾及地球物理信息的两种均衡重力场模型构建公式,分别讨论了CRUST2.0模型和补偿深度在两种补偿机制中构建重力场模型的贡献。数值分析表明,地壳模型中Moho面深度的算术平均值22.97km不是最佳补偿深度,而40km相对最优,补偿深度的对模型超高阶部分影响较小;CRUST2.0模型能够在361-1080频段内较好地改善原模型;相同补偿深度的面凝聚模型和Airy模型在不同频段的优劣性不一致。

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