非构造形变对中国大陆GNSS基准站垂向周期运动的影响  

Effects of Non-Tectonic Deformation on the Vertical Periodic Motion of GNSS Reference Stations in China

作　　者：梁洪宝[1] 刘志广[1] 黄立人[1] 占伟[1] 

机构地区：[1]中国地震局第一监测中心,天津市耐火路7号300180

出　　处：《大地测量与地球动力学》2015年第4期589-593,共5页Journal of Geodesy and Geodynamics

基　　金：中国地震局地震行业科研专项(201308009);中国地震局地震科技星火计划(XH15060Y);中国地震局青年震情跟踪课题(2014020205);中国地震局"三结合"课题(143301)

摘　　要：解算陆态网络2011～2013年GNSS基准站,获取其坐标时间序列,并定量计算非潮汐海洋、大气、积雪和土壤湿度对测站产生的非构造形变,以修正GNSS垂向时间序列。修正后,GNSS垂向序列特性发生显著变化：周年运动振幅和初相均发生明显变化,振幅明显缩小（个别站增大）,缩小幅度因不同区域而存在差异;修正前相位与修正后存在一定的系统偏差,大约滞后2～3个月,这种系统偏差可能是GNSS测站对地球物理因素＂迟钝反应＂的综合表现;半周年运动的变化主要体现在振幅上,缩小幅度在1mm左右。We get the coordinate time series by solving CMONOC GNSS reference stations during 2011-2013 and calculate the non-tectonic deformation on sites produced by non-tidal ocean, atmospheric conditions, snow, and soil moisture. The GNSS vertical series has significant changes corrected by non-tectonic deformation： the amplitude and initial phase of annual motion present significant changes, and the amplitude reduced （individual sites increasing） and the narrow margin varies in different regions. The initial phase has a systematic bias before and after correction, with about 2-3 months lag, such that the systematic biases may be the effect of the GNSS sites＇ overall ＂slow response＂ to geophysical factors. The change of semi-annual motion reflects principally on the amplitude, with a narrow margin of about 1mm.

关 键 词：非构造形变 中国大陆 GNSS基准站 周年运动 半周年运动 

分 类 号：P227[天文地球—大地测量学与测量工程]