Determination of cm level ocean tide models with TOPEX/POSEIDON Altimetry data

1)利用TOPEX/POSEIDON高程资料和日本气象厅（JMA）的GANL资料，开发了估算海洋对潮汐势和大气波动响应的软件。利用TOPEX/POSEIDON资料进行了Mf海潮的探测，并利用观测到的海潮和水动力方程进行了同化工作。2)利用南极Syowa站超导重力仪一年的观测资料，获得了与卫星测高无关的海潮信息。3)建立了精确的日、半日海潮（cm级）模型，并对超导重力仪观测潮汐的海洋项进行校正，确定了固体地球的能量耗散。这一成果是这项研究工作的显著成果之一。4)我们讨论了利用TOPEX/POSEIDON和大气数据计算亚毫米水平的全球海洋动力学的可能性和一些策略。5)结合卫星测高资料和超导重力仪，成功估算了海平面变化对章动和重力潮的影响。

1) A software was developed to estimate the ocean response to the tidal potential and the atmospheric fluctuation using TOPEX/POSEIDON altimetry data and GANL (JMA,Japan) data. Mf ocean tide was detected from the TOPEX/POSEIDON data and then assimilation works were made using this observed tide and hydrodynamic equations.2) We investigated one year observations of a superconducting gravimeter at Syowa Station, Antarctica and obtained the informations on ocean tide which are independent of the satell-ite altimetry.3) Precise models of diunal and semidiurnal ocean tides (cm level) were establised and then the energy dissipation of the solid Earth was determined after correction of oceanic terms for observed tides given by superconducting gravimeters. This result is one of the remarkable products of this research work.4) We discussed possibilities and some strategies to work out the global ocean dynamics up to sub mm level depending on TOPEX/POSEIDON and atmospheric data.5) We succeeded to estimate the effect of sea level variation to the nutation and the gravity tides by combining the satellite altimetry data and the superconducting gravimeters.