SNREI地球形变理论模拟研究进展

获取固体地球在内外力驱动下的形变特征是认识地球内部结构和动力过程的关键,全球和区域形变的观测与研究是高精度时空基准建立和维持的重要内容之一。本文系统介绍了地球形变理论模拟研究的主要进展,重点介绍了大气、海洋、陆地水和热在地表的负荷效应,以及内部的地震位错产生的形变问题。内容涉及基本的地球(热)弹性变形的初边值理论,及其有效求解方法与计算过程中遇到的困难及解决方案。最后在弹性形变的基础上,结合现今观测精度不断提高和人类活动对环境影响的背景,展望了未来在地球形变理论上的发展需求与应用前景。

Progress in deformation modeling of an SNREI Earth

Acquiring the characteristics of the Earth's deformation induced by the internal and external forces is the key to recognizing the Earth's internal structure and dynamic processes. Observing and investigating the global and regional deformation is one of the important tasks for constructing and maintaining a high precision space-time reference. This paper introduces in details the main progress in the theoretical modeling of the Earth's deformation. The emphases are on the loading effects of the atmosphere, oceans, land water and heat, as well as the deformation caused by seismic dislocation. The main points involve the fundamental theory of (heat) elastic deformation, the efficient methods to the solution and the difficulties in the computation, as well as the solving strategies to these difficulties. Finally, on the basis of the elastic deformation, we prospect the requirements and potential applications of the Earth's deformation theories under the background that the accuracies of the instruments are more and more improved and human's activities intensively affect the global environment.