佘山地震监测中心站重力固体潮海潮负荷效应分析  

Study of the ocean tide loading effects of gravity solid tide at Sheshan Seismic Monitoring Center Station

作　　者：叶青 方韬 钟卫星 倪友忠 朱国豪 任烨 YE Qing;FANG Tao;ZHONG Weixing;NI Youzhong;ZHU Guohao;REN Ye(Sheshan Seismic Monitoring Center Station,Shanghai 201602,China)

机构地区：[1]佘山地震监测中心站,上海201602

出　　处：《地震地磁观测与研究》2023年第2期127-133,共7页Seismological and Geomagnetic Observation and Research

基　　金：中国地震局地震监测、预报、科研三结合课题(项目编号:22030401);上海佘山地球物理国家野外科学观测研究站开放基金课题(项目编号:SSOP202109)。

摘　　要：佘山地震监测中心站重力固体潮汐观测受海潮负荷影响较大,选取2020年1月-2021年10月重力整点值数据,采用Eterna3.30标准潮汐分析软件获得重力潮汐参数,8个主波振幅因子中误差均在1%以内。选择8个全球海潮模型,对振幅较大的O_(1)、K_(1)和M_(2)波进行海潮负荷改正效应分析。结果表明,O_(1)、K_(1)和M_(2)波的重力海潮负荷振幅分布在4.6-5.4μGal,在经全球海潮模型负荷改正后,周日波O_(1)、K_(1)残差振幅大幅减小,其残差负荷改正平均有效性分别为55.90%和71.27%;而半日波M2振幅未得到有效改正,可能与未考虑区域海潮模型有关。The gravity solid tide observation at Sheshan Seismic Monitoring Center Station is greatly affected by the ocean tide load.This study selected the gravity observation data from January 2020 to November 2021 and obtained the gravity tide parameters,showing that the mean square errors of all 8 main wave amplitude factors are within 1%.By selecting 8 ocean tide models,the ocean tide load correction calculation is carried out for O_(1),K_(1),and M_(2) waves.The analysis results show that the amplitude of gravity ocean tide load of O1,K_(1),and M_(2) waves is distributed in 4.6-5.4μGal.After load correction,the residual amplitudes of diurnal waves O_(1) and K_(1) decrease significantly.Respectively,the average effectiveness of residual load correction is 55.90% and 71.27%.The amplitude of semidiurnal wave M_(2) is not effectively corrected,which may be related to the failure to consider the regional ocean tide model.

关 键 词：重力仪 海潮模型 海潮负荷 固体潮汐 

分 类 号：P315.7[天文地球—地震学]