大连台重力固体潮受海潮负荷影响特征研究

Study on Ocean Tidal Loading Correction of Tidal Gravity at Dalian Station

大连台重力固体潮汐观测受海潮负荷影响较大,选取2015年1月1日~2019年8月14日的重力数据进行预处理,获得重力潮汐参数,基于选取的8个海潮模型对O1、K1和M2波进行海潮负荷改正及评价分析。数值分析结果表明,O1、K1和M2波的重力海潮负荷振幅分布频段在2.4~2.8μGal之间,3个主潮波的残差负荷改正有效性为43%~53%,8个海潮模型对大连台主潮波的海潮负荷改正差别较小。

The observation of gravity solid tide at Dalian station has been greatly affected by ocean tide load.In this paper,based on the selected ocean tide models,we select gravity data for preprocessing to obtain gravity tide parameters,to carry out ocean tide load correction and evaluation analysis on O1,K1,and M2 waves.The numerical analysis shows that the eight global ocean tide models have little difference in the effectiveness of the load correction of the main tidal waves.The gravitational ocean tide load amplitude distribution frequency bands of the O1,K1 and M2 waves are between 2.4 and 2.8μGal.The residual load correction effectiveness of the three main tide waves is 43%~53%,and the eight ocean tide models have relatively small differences in the correction of the main tide waves of Dalian station.