Numerical simulations of generation and propagation of internal tides in the Andaman Sea
Numerical simulations of generation and propagation of internal tides in the Andaman Sea
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DOI：
10.3389/fmars.2022.1047690
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发表时间：
2022-11
期刊：
影响因子：
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通讯作者：
W. Wang;Y. Gong;Z. Wang;C. Yuan
中科院分区：
文献类型：
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作者：
W. Wang;Y. Gong;Z. Wang;C. Yuan
利用三维高分辨率数值模型研究了安达曼海内潮的产生和传播。利用4个主要的半日潮（M2、S2、N2和K2）、4个主要的日潮（K1、O1、P1和Q1）和8个主要潮（M2、S2、N2、K2、K1、O1、P1和Q1）驱动模式，设计了3类实验来检验正压潮的影响。结果表明，安达曼海以半日内潮为主，日正压潮对这一结果的调节作用可以忽略不计。这部分是由于该地区日正压潮的强度一般比半日正压潮的强度小一个数量级。灵敏度实验为这一观点提供了更坚实的基础。在内部潮汐能方面，在春潮和小潮期间，日正压潮驱动的实验分别比半日正压潮驱动的实验小3个数量级和1个数量级。此外，实验结果表明，安达曼海的正斜压能量总转换率在春潮期分别为29.15 GW（8次潮汐驱动）、29.24 GW（4次半日潮驱动）和0.05 GW（4日潮驱动），小潮期分别为3.08 GW、2.56 GW和0.31 GW。发现了四个潜在内潮生成区，其中三个在安达曼和尼科巴群岛，一个在安达曼海东北部。
The generation and propagation of internal tides in the Andaman Sea are investigated using a three-dimensional high-resolution numerical model. Three categories of experiments, including driving the model with four main semidiurnal tides (M2, S2, N2, and K2), four main diurnal tides (K1, O1, P1, and Q1), and eight main tides (M2, S2, N2, K2, K1, O1, P1, and Q1), are designed to examine the effects of barotropic tides. The results show that the semidiurnal internal tides are dominant in the Andaman Sea, and the inclusion of diurnal barotropic tides negligibly modulates this result. That is partly due to the strength of the diurnal barotropic tides is generally one order smaller than that of the semidiurnal barotropic tides in this region. The sensitivity experiments put this on a firmer footing. In terms of the internal tidal energy, the experiments driven by the diurnal barotropic tides are three orders and one order smaller than those driven by the semidiurnal barotropic tides, respectively, during the spring and neap tides. In addition, the experiments result in total barotropic-to-baroclinic energy conversion rates over the Andaman Sea 29.15 GW (driven by the eight tides), 29.24 GW (driven by the four semidiurnal tides), and 0.05 GW (driven by the fourdiurnal tides) in the spring tidal period and 3.08 GW, 2.56 GW, and 0.31 GW in the neap tidal period, respectively. Four potential generation regions of internal tides are found, three of which are in the Andaman and Nicobar Islands and one in the northeastern Andaman Sea.