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首页> 外文期刊>Continental Shelf Research: A Companion Journal to Deep-Sea Research and Progress in Oceanography >Assimilating TOPEX/POSEIDON derived tides in a primitive equation model over the Newfoundland Shelf
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Assimilating TOPEX/POSEIDON derived tides in a primitive equation model over the Newfoundland Shelf

机译：在纽芬兰大陆架上的原始方程模型中吸收TOPEX / POSEIDON派生的潮汐

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摘要

M2 semidiurnal tidal elevations and currents over the Newfoundland Shelf are derived by combining tidal analyses of TOPEX/POSEIDON altimeter data and a regional hydrodynamic model in an assimilation scheme based on optimal linear interpolation. The model is governed by three-dimensional nonlinear primitive equations for homogeneous fluids and a turbulence closure scheme for vertical eddy viscosity. The results are compared with a complementary Baseline model forced by boundary conditions derived from earlier work, independent of the altimetrically derived tides, In situ sea level and current measurements provide a second independent check of the Assimilation model results, Tidal heights from the Assimilation model agree with both the Baseline model and the observations within the expected in situ errors. Useful results in a coastal setting were thus achieved with TOPEX/POSEIDON derived tides as the only external input. A comparison of model and observed current fields shows greater differences: the model flow fields are sensitive to differences in tidal elevation that are still at the noise level in presently available altimetric and in situ measurements. (C) 1999 Elsevier Science Ltd. All rights reserved. [References: 26]
机译：通过将TOPEX / POSEIDON高度计数据的潮汐分析与基于最优线性插值的同化方案中的区域水动力模型相结合，得出纽芬兰大陆架上的M2半日潮汐高度和洋流。该模型由用于均质流体的三维非线性本原方程和用于垂直涡流粘度的湍流闭合方案控制。将结果与由早期工作得出的边界条件强迫的补充基准线模型进行比较，而不受海拔高度潮汐的影响。原位海平面和海流测量值再次提供了对同化模型结果的独立检查，同化模型的潮汐高度一致基线模型和观测值均在预期的原位误差范围内。因此，使用TOPEX / POSEIDON衍生的潮汐作为唯一的外部输入，可以在沿海地区获得有用的结果。模型流场和观测流场的比较显示出更大的差异：模型流场对潮汐高程的差异敏感，潮汐高程的差异仍处于当前可用的高度测量和现场测量中的噪声水平。 （C）1999 Elsevier ScienceLtd。保留所有权利。 [参考：26]

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