联合GPS和GRACE数据分析陕甘宁地区地表垂直形变  

Analysis of Vertical Deformation in Shaanxi-Gansu-Ningxia Area by GPS and GRACE Data

作　　者：郭飞霄[1,2,3] 谷延超 崔阳 孙中苗 GUO Feixiao;GU Yanchao;CUI Yang;SUN Zhongmiao(School of Surveying and Mapping,Information Engineering University,62 Kexue Road,Zhengzhou 450001,China;State Key Laboratory of Geo-Information Engineering,1 Middle-Yanta Road,Xi’an 710054,China;Xi’an Research Institute of Surveying and Mapping,1 Middle-Yanta Road,Xi’an 710054,China;School of Civil Engineering and Geomatics,Southwest Petroleum University,8 Xindu Road,Chengdu 610500,China;Army Logistics University of PLA,20 Beiyi Road,Chongqing 401311,China)

机构地区：[1]信息工程大学地理空间信息学院,郑州市450001 [2]地理信息工程国家重点实验室,西安市710054 [3]西安测绘研究所,西安市710054 [4]西南石油大学土木工程与测绘学院,成都市610500 [5]陆军勤务学院,重庆市401311

出　　处：《大地测量与地球动力学》2020年第7期697-703,共7页Journal of Geodesy and Geodynamics

基　　金：国家重点基础研究发展计划(2013CB733303);国家自然科学基金(41674082,41804006);中国科学院测量与地球物理研究所大地测量与地球动力学国家重点实验室开放基金(SKLGED2017-3-2-E);重庆市自然科学基金(cstc2018jcyjAX0392)。

摘　　要：采用甘肃省CORS网和中国大陆构造环境监测网络中共48个台站的GPS观测数据,解算得到观测台站的垂直位移,并与GRACE时变重力场Mascon模型解CSR RL05M数据计算得到的垂直形变进行比较,分析区域地表垂直形变特征。结果表明,研究区内台站垂直形变存在局部特征,甘肃庆阳和平凉地区垂直形变与其他地区存在明显差异,相关系数、均方根减少量和周年信号减少量均高于其他地区;扣除趋势项后,观测台站GPS垂直位移与GRACE垂直形变时间序列相关系数均值为0.72,GPS和GRACE周年信号振幅均值分别为6.00 mm和3.70 mm,周年信号减少量和均方根误差减少量均值分别为0.51和0.29;研究区内GPS垂直位移和GRACE垂直形变时间序列一致性较强,GRACE垂直形变能有效解释50%以上的GPS垂直位移周年信号,GPS垂直位移时间序列包含的非构造形变中平均约29%来源于环境负载变化所引起的负荷形变。Based on GPS observation data from Gansu continuously operational reference system(CORS)and crustal movement observation network of China(CMONOC),we calculate the vertical deformation of 48 stations.We perform a comparative analysis between GPS vertical displacement and GRACE vertical deformation calculated by CSR RL05M data.The results show local characteristics of vertical deformation in the study area.There is significant difference between eastern Gansu province and the other areas.Correlation coefficient,RMS reduction,and annual amplitude reduction are larger than the other areas.The mean correlation coefficient of GPS and GRACE vertical deformation time series without trend term is 0.72.The mean annual amplitude of GPS and GRACE are 6.00 mm and 3.70 mm respectively.Mean annual amplitude reduction and RMS reduction are 0.51 and 0.29.The results indicate strong consistency.GRACE vertical deformation can explain more than 50%of the annual GPS vertical displacement signal.An average of about 29%of the crustal deformation contained in GPS vertical displacement time series is induced by environmental loading.

关 键 词：垂直形变 GPS GRACE 时间序列 环境负荷 

分 类 号：P228[天文地球—大地测量学与测量工程] P312[天文地球—测绘科学与技术]