Non-assimilated tidal modeling of the South China Sea
Non-assimilated tidal modeling of the South China Sea
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DOI：
10.1016/j.dsr.2013.04.006
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发表时间：
2013-08-01
影响因子：
2.4
通讯作者：
David, Tomos W.
中科院分区：
文献类型：
--
作者：
Green, J. A. Mattias;David, Tomos W.
利用已建立的潮汐模式对南海潮汐进行了模拟，目的是评价非同化模式在该区域的可行性。对局部占主导地位的日（K-1）和半日（M-2）潮汐分量进行了模拟，结果表明，该模式在海拔高度和消散水平方面都提供了相当准确的结果。然而，只有当模型中包含了现实的潮汐转换参数化时才会出现这种情况，这表明潮汐转换在该地区的其他模型工作中是一个缺失的过程。与观测值相比，在整个区域积分时，模型的耗散水平略微高估，而在斜压潮汐波具有超临界坡度的地形上，模型的耗散水平要大得多。对超临界地形的潮汐转化率进行了粗略的经验校正，并在模型中实施，结果表明，在海拔高度和耗散率方面，模型结果都得到了改善。结果表明，所建立的模型适用于研究扰动（如未来海平面上升）对南海潮汐动力学的影响。(c) 2013 Elsevier Ltd.版权所有。
The tides in the South China Sea were simulated using an established tidal model, with the purpose to evaluate if non-assimilated modeling of the area is feasible. Simulations were done for the locally dominating diurnal (K-1) and semi-diurnal (M-2) tidal constituents, and the model was shown to provide reasonably accurate results in terms of both elevations and levels of dissipation. However, this was only the case when a realistic tidal conversion parameterization was included in the model, and it is suggested that tidal conversion is a missing process in other model efforts of the area. Compared to observations, the modeled dissipation levels were slightly overestimated when integrated over the entire domain, and far larger in the model at topography with a slope which is supercritical for the baroclinic tidal waves. A crude, empirical correction of the tidal conversion rates at supercritical topography is suggested and implemented in the model and shown to improve the model results in terms of both elevations and dissipation rates. It is concluded that the presented model set up is suitable for investigations of how perturbations, e.g., future sea-level rise, will affect the tidal dynamics in the South China Sea. (c) 2013 Elsevier Ltd. All rights reserved.