Generation and evolution of internal solitary waves in the southern Taiwan Strait
Generation and evolution of internal solitary waves in the southern Taiwan Strait
复制标题
台湾海峡南部内孤立波的产生与演化
DOI：
10.1080/03091929.2019.1590568
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发表时间：
2019-03
影响因子：
1.3
通讯作者：
Baoshu Yin
中科院分区：
文献类型：
--
作者：
Wenjia Min;Qun Li;Peiwen Zhang;Zhenhua Xu;Baoshu Yin
摘要利用一个高分辨率非静力数值模式，结合实际背景条件，研究了台湾海峡南部内孤立波的生成过程和潜在能量来源。两种主要类型的ISW被澄清，根据其不同的能源。一种是由吕宋海峡的远程内潮的非线性分解产生的，另一种是由当地的潮汐地形相互作用在大陆坡产生。这两种ISW的基本性质和演化过程不同。在吕宋海峡的远程内潮起源的波的振幅与以前的现场观测。相反，本地产生的ISW比观测到的波弱得多，即使在稳定的离岸背景流的存在下，这加剧了陆上ISW的产生。由远程生成的M2内潮引起的ISW比由K1内潮引起的ISW更强，并且传输到陆架上的内波能量的分数不受远程生成的内潮强度的显著影响。
ABSTRACT The generation processes and potential energy sources of internal solitary waves (ISWs) in the southern Taiwan Strait are investigated by driving a high resolution non-hydrostatic numerical model with realistic background conditions. Two main types of ISWs are clarified according to their different energy sources. One is generated by the nonlinear disintegration of remote internal tides emanating from Luzon Strait, and the other type is generated by local tide-topography interaction at the continental slope. The basic properties and evolution processes differ between these two kinds of ISWs. The waves originated from the remote internal tides at Luzon Strait have amplitudes comparable to previous field observations. In contrast, the ISWs generated locally are much weaker than observed waves, even in the presence of a steady offshore background current, which intensifies the generation of onshore ISWs. The ISWs induced by remotely generated M2 internal tides are stronger than those induced by K1 internal tides, and the fraction of internal wave energy transmitted onto the shelf is not significantly influenced by the intensity of remotely generated internal tides.
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