CRUST 2.0模型在均衡位模型构建中的应用研究  

Application of CRUST 2.0 Global Crustal Model in Isostatic Potential Model Construction

作　　者：王凯 刘晓刚[3,4] 李鹃 毛莉 

机构地区：[1]总装备部工程设计研究总院 [2]63801部队 [3]西安测绘研究所 [4]武汉大学地球空间环境与大地测量教育部重点实验室 [5]61287部队

出　　处：《测绘学报》2013年第5期640-647,共8页Acta Geodaetica et Cartographica Sinica

基　　金：国家自然科学基金(41174026;41104047;41304022);地球空间环境和大地测量教育部重点实验室开放基金(11-01-03)

摘　　要：立足于面凝聚模型和Airy模型两种均衡补偿机制，研究CRUST2．0全球地壳模型在构建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36]～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。With spherical layer distribution and Airy compensation models, the application of CRUST 2. 0 in the establishment of isostatic potential model was studied here. Calculation models of the isostatic EGM were derived. Then, the contributions of CRUST 2. 0 and compensation depth towards the models were discussed. Numerical experiments show that 22. 97 km is not the best compensation depth, while 40 km is better than the others, and compensation depths do little help to the ultra-high-degree part of the original model. Besides, the crustal model could modify the ideal model between degree 361 and 1080. Finally, it is hard to figure out which one is better than the other when spherical layer distribution and Airy compensation model have the same compensation depth.

关 键 词：均衡理论 CRUST 2 0 均衡位模型 补偿深度 地球重力场模型 

分 类 号：P223[天文地球—大地测量学与测量工程]