陕西省GPS基准站垂直形变的陆地水负荷效应  

Vertical displacement due to land water loading effects at GPS fiducial stations in Shaanxi Province

作　　者：郑增记 苏利娜[1] 范丽红[3] 翟宏光 张永奇[1] 韩美涛[1] ZHENG Zengji;SU Lina;FAN Lihong;ZHAI Hongguang;ZHANG Yongqi;HAN Meitao(Shaanxi Earthquake Agency,Xi’an 710068,China;Shanghai Astronomical Observatory,CAS,Shanghai 200030,China;School of Geology Engineering and Geomatics,Chang’an University,Xi’an 710054,China)

机构地区：[1]陕西省地震局,陕西西安710068 [2]中国科学院上海天文台,上海200030 [3]长安大学地质工程与测绘学院,陕西西安710054

出　　处：《测绘工程》2018年第9期6-10,共5页Engineering of Surveying and Mapping

基　　金：中国地震局监测;预测;科研三结合课题(CEA-JC/3JH-162705;CEA-JC/3JH-172703);陕西省地震局启航与创新基金资助项目(201401;201704);中央高校基本科研业务费(CHD310826165018)

摘　　要：基于GPS、GRACE以及GLDAS 3种数据从均方根、相关性、周年振幅和相位4个方面对陕西省22个GPS基准站的垂直负荷形变进行定量分析和研究,结果表明:陕西省GPS垂向形变时间序列中,陆地水负荷形变并不明显,其中GRACE的贡献值为11.7%,GLDAS的贡献值为11.0%;GPS与GRACE以及GPS与GLDAS的相关系数大于等于0.5的站点比例分别是63%和77%;对于振幅而言,GPS的振幅最大,GRACE的振幅其次,GLDAS的振幅最小。文中研究陕西省陆地水负荷形变的量值和特征,为获取更高精度的构造形变提供依据。Vertical loading deformation of 22 GPS fiducial stations in Shaanxi province are analyzed quantitatively and studied based on GPS,GLDAS and GRACE data from the root mean square,the correlation,the annual amplitude and phase.The result shows that land water loading deformation in vertical component of GPS time series in Shaanxi province is not significant,and the contributions of GRACE and GLDAS to GPS vertical deformation are 11.7 percent and 11.0 percent respectively.The ratios which correlation coefficients of GPS with GRACE and GPS with GLDAS greater than or equal to 0.5 are 63 percent and 77 percent respectively.For the amplitude,GPS is the largest,GRACE is the second,and GLDAS is the smallest.For the initial phase,GPS,GRACE and GLDAS are very consistent.The paper shows the magnitude and characteristics of land water loading deformation in Shaanxi Province,and provides the basis for obtaining more accurate structural deformation.

关 键 词：GPS基准站 垂直形变 陆地水负荷效应 GRACE GLDAS 

分 类 号：P227[天文地球—大地测量学与测量工程]