Accuracy assessment of recent ocean tide models
Accuracy assessment of recent ocean tide models
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DOI：
10.1029/97jc00445
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发表时间：
1997-11
影响因子：
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通讯作者：
C. Shum;P. Woodworth;O. Andersen;G. Egbert;O. Francis;C. King;S. Klosko;C. Provost;X. Li;J. Molines;M. E. Parke;R. Ray;M. Schlax;D. Stammer;Craig C. Tierney;P. Vincent;C. Wunsch
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文献类型：
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作者：
C. Shum;P. Woodworth;O. Andersen;G. Egbert;O. Francis;C. King;S. Klosko;C. Provost;X. Li;J. Molines;M. E. Parke;R. Ray;M. Schlax;D. Stammer;Craig C. Tierney;P. Vincent;C. Wunsch
自1994年以来，已经建立了20多个全球海洋潮汐模型，这主要是对TOPEX/POSEIDON的精确测高结果进行分析的结果，也是潮汐数值模拟和数据同化并行发展的结果。本文对10个这样的潮汐模型进行了精度评估，并讨论了它们在大地测量学、海洋学和地球物理学等多个领域的益处。各种检验表明，所有这些潮汐模型在深海2-3 cm的范围内都是一致的，它们比经典的Schwiderski 1980模型有了大约5 cm的RMS改进。因此，选择了两个潮汐模型用于1995年底TOPEX/Poseidon地球物理数据记录的再处理。目前的海洋潮汐模型允许使用卫星测高改进对深海表面动态地形的观测。其他重大贡献包括盗窃用于改进TOPEX/POSEIDON和其他大地测量卫星的轨道计算，准确预测地球自转激发，改进大地观测站的海洋负荷改正估计，并使天文潮汐与具有气象和地球物理根源的现象更好地分开。这些潮汐模型之间的最大差异出现在浅海，这表明目前的模型在这些地区仍然存在问题。随着更多高质量的高度计数据和将数据同化为高分辨率流体动力学模型的数值技术的进步，预计全球潮汐模型的未来将得到改进。
Over 20 global ocean tide models have been developed since 1994, primarily as a consequence of analysis of the precise altimetric measurements from TOPEX/POSEIDON and as a result of parallel developments in numerical tidal modeling and data assimilation. This paper provides an accuracy assessment of 10 such tide models and discusses their benefits in many fields including geodesy, oceanography, and geophysics. A variety of tests indicate that all these tide models agree within 2-3 cm in the deep ocean, and they represent a significant improvement over the classical Schwiderski 1980 model by approximately 5 cm rms. As a result, two tide models were selected for the reprocessing of TOPEX/POSEIDON Geophysical Data Records in late 1995. Current ocean tide models allow an improved observation of deep ocean surface dynamic topography using satellite altimetry. Other significant contributions include theft applications in an improved orbit computation for TOPEX/POSEIDON and other geodetic satellites, to yield accurate predictions of Earth rotation excitations and improved estimates of ocean loading corrections for geodetic observatories, and to allow better separation of astronomical tides from phenomena with meteorological and geophysical origins. The largest differences between these tide models occur in shallow waters, indicating that the current models are still problematic in these areas. Future improvement of global tide models is anticipated with additional high-quality altimeter data and with advances in numerical techniques to assimilate data into high-resolution hydrodynamic models.