云南地壳垂直季节性形变的精确获取与机理分析

地壳垂直季节性形变的机理分析有助于地壳构造运动研究、参考框架维持等，GPS连续观测是精确获取垂直季节性形变的重要手段之一。随着GPS连续观测的大量增加和应用，对观测数据获取的精度要求不断提升，应用高精度垂向数据分析垂直季节性形变的特征和机理也日渐可行，一些以前关注不够、影响量级较小的因素，在数据的有效应用中显得愈加突出。为此，本项目以提升GPS连续观测地壳垂直季节性形变的精度和可靠性、应用高精度GPS垂向数据分析地壳垂直季节性形变的成因机理为目标，以具有较长观测时间、稳定的GPS连续观测的云南为研究区域，综合研究GPS获取的地壳垂直季节性形变所包含的系统误差和地球物理效应的特征和处理方法。采用最新的数据处理模型和解算策略消减系统误差，获取精确的地球物理效应并建立弹性负荷模型进行数值模拟分析，进而研究区域地壳垂直季节性形变的成因机理，为GPS连续观测的有效应用及垂直形变机理研究提供参考。

An understanding of seasonal vertical crustal deformation(SVCD) improves the study on crustal deformation, the stability of the terrestrial reference frame and so on, continuous GPS(cGPS) becomes an important measurement to estimate the SVCD precisely. With the increase of cGPS observation and its application, the accuracy of the acquisition is continuously increasing, the characteristics and mechanism of SVCD based on high-precision GPS data are becoming more and more feasible, factors with small magnitude appear to be more prominent in the effective application. Thus, this project aims to improve the accuracy and reliability of the SVCD and to analyze the mechanism of SVCD inferred by cGPS. Taking Yunnan and its neighboring areas as research area, in which a very dense cGPS monitoring network has been established with relatively long observing time, this project focus on the study of systematic errors and geophysical effects contained in SVCD obtained by cGPS. We use the latest data processing models and solving strategies to reduce systematic errors and obtain the geophysical effects precisely, then we establish an elastic load model to numerical analyze the geophysical effects. Furthermore, the mechanism of the SVCD in the research area will be analyzed to provide reference for the effective application of cGPS and the mechanism of vertical crustal deformation.