Long-range propagation and associated variability of internal tides in the South China Sea
Long-range propagation and associated variability of internal tides in the South China Sea
复制标题
南海内潮汐的远距离传播和相关变化
DOI：
10.1002/2016jc012105
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发表时间：
2016-11
期刊：
影响因子：
--
通讯作者：
Li Qun
中科院分区：
文献类型：
--
作者：
XU Zhen Hua;Liu Kun;Yin Bao Shu;Zhao Zhong Xiang;Wang Yang;Li Qun
利用一个高分辨率数值模式，研究了南海内潮在产生和长期传播过程中的变化。本文阐明了全日内潮和半日内潮在产生、传播和耗散过程上的显著差异。南海内潮有多个源点，其中吕宋海峡是主要的源点，对M2和K1的斜压能量贡献分别约为90%和74%。在吕宋海峡以西，南海K1内潮的本地生成比M2内潮更活跃。吕宋海峡的全日和半日内潮辐射到南海，呈现南北不对称性，但由于双脊系统的复杂性，辐射型也有所不同。潮梁可以穿越深盆，最终到达1000-1500多公里外的越南海岸和南沙群岛。在传播过程中，M2内潮保持西南方向，而K1表现出复杂的波场，因为从本地源和岛屿散射效应的波的叠加。在吕宋海峡内的显着消散后，剩余的能量进入南海，并减少了90%以上的距离超过1000公里。在南海内部，K1型内潮波峰长、波束角小，受海底地形影响较大，沿整个路径沿着发生明显的消散，而M2型内潮在到达中沙岛后才发生明显的消散。本文受版权保护。All rights reserved.
The variability of internal tides during their generation and long-range propagation in the South China Sea (SCS) is investigated by driving a high-resolution numerical model. The present study clarifies the notably different processes of generation, propagation and dissipation between diurnal and semidiurnal internal tides. Internal tides in the SCS originate from multiple source sites, among which the Luzon Strait is dominant, and contributes approximately 90% and 74% of the baroclinic energy for M2 and K1, respectively. To the west of the Luzon Strait, local generation of K1 internal tides inside the SCS is more energetic than the M2 tides. Diurnal and semidiurnal internal tides from the Luzon Strait radiate into the SCS in a north-south asymmetry but with different patterns because of the complex two-ridge system. The tidal beams can travel across the deep basin and finally arrive at the Vietnam coast and Nansha Island more than 1000-1500 km away. During propagation, M2 internal tides maintain a southwestward direction, whereas K1 exhibit complicated wave fields because of the superposition of waves from local sources and island scattering effects. After significant dissipation within the Luzon Strait, the remaining energy travels into the SCS and reduces by more than 90% over a distance of ∼1000 km. Inside the SCS, the K1 internal tides with long crests and flat beam angles are more influenced by seafloor topographical features and thus undergo apparent dissipation along the entire path, whereas the prominent dissipation of M2 internal tides only occurs after their arrival at Zhongsha Island. This article is protected by copyright. All rights reserved.
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影响因子：
--
作者：
M. Chiou;S. Jan;Joe Wang;R. Lien;Hwa Chien
通讯作者：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
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