联合GNSS和GRACE数据分析华北平原地表垂直形变  

ANALYSIS OF SURFACE VERTICAL DEFORMATION IN NORTH CHINA PLAIN BY COMBINING GNSS AND GRACE DATA

作　　者：魏仁杰 王迪晋[1] 董培育[1] 王东振[1,2] 施贺青 赵斌 WEI Ren-Jie;WANG Di-Jin;DONG Pei-Yu;WANG Dong-Zhen;SHI He-Qing;ZHAO Bin(Institute of seismology of China Earthquake Administration,Wuhan 430071,Hubei,China;Wuhan Gravity and Solid Tide National Field Scientific Observation and Research Station,Wuhan 430071,Hubei,China)

机构地区：[1]中国地震局地震研究所,湖北武汉430071 [2]武汉引力与固体潮国家野外科学观测研究站,湖北武汉430071

出　　处：《内陆地震》2024年第1期42-53,共12页Inland Earthquake

基　　金：武汉引力与固体潮国家野外科学观测研究站开放研究基金资助课题(WHYMZ202113);湖北省自然基金(2021CFB504)。

摘　　要：为了分析华北平原陆地水储量变化等环境因素对GNSS非线性垂向时间序列产生的影响,结合GRACE数据和GNSS数据以水井水位数据为补充对华北平原进行研究。研究结果表明,华北平原地区GNSS垂向位移时间序列与GRACE负荷形变具有较好的相关性,改正后的GNSS观测与GRACE负荷形变的相关性有较大程度地减少。基于水井静水位资料对结果的可靠性进行了验证,扣除GRACE负荷形变影响后的GNSS垂向位移时间序列与水井静水位观测之间的相关系数相较于扣除前降低了40%~96.7%。将GRACE观测得到的负荷形变从GNSS时间序列中扣除,可以有效降低包括陆地水储量变化在内的环境因素导致的负荷形变对GNSS观测造成的非构造运动影响。研究结果为获取华北平原及其周边地区更为精确的垂向构造运动变形提供了科学参考。In order to analyze the impact of environmental factors such as changes in terrestrial water storage in the North China Plain on GNSS nonlinear vertical time series,the North China Plain was studied with GRACE data and GNSS data supplemented by well water level data.The results show that the GNSS vertical displacement time series in the North China Plain has a good correlation with the GRACE load deformation,and the correlation between the corrected GNSS observation and the GRACE load deformation is greatly reduced.The reliability of the results is verified based on the static water level data of the well.The correlation coefficient between the GNSS vertical displacement time series after deducting the influence of GRACE load deformation and the static water level observation of the well is reduced by 40%~96.7%compared with that before deducting.Deducting the load deformation observed by GRACE from the GNSS time series can effectively reduce the impact of load deformation caused by environmental factors,including changes in terrestrial water reserves,on the non-tectonic movement caused by GNSS observations.The research results provide a scientific reference for obtaining more accurate vertical tectonic deformation in the North China Plain and its surrounding areas.

关 键 词：GRACE数据 GNSS数据 GEEMDAN 负荷形变 相位改正 

分 类 号：P315.7[天文地球—地震学]