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厦门台重力固体潮观测长期受海潮负荷影响.应用重力固体潮观测资料进行地震预报和地球物理研究时,需要对其海潮负荷的影响和改正进行研究.本文应用TSOFT软件对厦门台弹簧重力仪五年的连续观测数据进行预处理,并采用Venedikov调和分析方法获得重力固体潮潮汐参数.基于DTU10、EOT11a、HAMTIDE11a、GOT4.7、FES2004、NAO99b、TPXO7.2和TPXO7.2atlas八个较新的全球海潮模型,结合osu.chinasea.2010和NAO.99Jb两个区域海潮模型,研究了厦门台的重力海潮负荷特征并对其进行海潮负荷改正.数值结果表明,经过区域海潮模型修正后的厦门台海潮负荷为7.3μgal.八个全球海潮模型对主要潮波的负荷改正有效性的差异不大.应用NAO.99Jb区域海潮模型修正的M2波剩余残差值比osu.chinasea.2010小.观测残差负荷改正有效性大致在40%~70%.统计对比O1、K1、M2波的残差平方和结果表明,对厦门台进行海潮负荷改正时,应用经NAO.99Jb区域海潮模型改正的NAO.99b全球海潮模型残差结果最小,经NAO.99Jb区域海潮模型改正的DTU10全球海潮模型次之.这可能与NAO.99Jb模型考虑日本沿岸验潮站资料有关.考虑高精度近海海潮模型的构建和验潮站资料的弥补以及数据预处理方法的改进,可以进一步提高厦门台的海潮负荷的改正效果.
Xiamen taiwan gravity tide observations have long been affected by the tide load.The application of gravity tide observation data to earthquake prediction and geophysical research needs to study the influence and correction of tidal load.Using TSOFT software, Years of continuous observation data pretreatment, and using Venedikov harmonic analysis method to obtain gravity tide parameters of gravity tidal based on DTU10, EOT11a, HAMTIDE11a, GOT4.7, FES2004, NAO99b, TPXO7.2 and TPXO7.2atlas eight newer global The tide model of the oceanic tide, combined with the tide models of osu.chinasea.2010 and NAO.99Jb, studied the gravity tide load characteristics of Xiamen taiwan and corrected the tide load. The numerical results show that after the tide model of Xiamen tide is amended, The load of 7.3μgal.The eight global tide model for the main tidal wave load correction effectiveness is not significant.Applied NAO.99Jb regional tide model modified M2 residual wave residual value than osu.chinasea.2010 observed residual The effectiveness of the load correction is roughly 40% ~ 70%. Statistical comparison of the residual sum of squares of O1, K1, M2 wave results shows that the tidal load In the correction, the global residual tide model NAO.99b corrected with the NAO.99Jb regional tide model has the smallest residual, followed by the DTU10 global tide model corrected with the NAO.99Jb regional tide model, which may be related to the NAO.99Jb model Tidal gauge data.Considering the construction of high-precision offshore tidal model and tide gauge data to make up and data pretreatment methods to improve, you can further improve the Xiamen station tidal load correction.