Simulations of Internal Solitary Wave Interactions with Mesoscale Eddies in the Northeastern South China Sea
Simulations of Internal Solitary Wave Interactions with Mesoscale Eddies in the Northeastern South China Sea
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DOI：
10.1175/jpo-d-15-0029.1
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发表时间：
2015-11
影响因子：
3.5
通讯作者：
Jieshuo Xie;Yinghui He;Zhiwu Chen;Jiexin Xu;S. Cai
中科院分区：
文献类型：
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作者：
Jieshuo Xie;Yinghui He;Zhiwu Chen;Jiexin Xu;S. Cai
综合分析南海东北部海域合成孔径雷达图像和卫星高度计资料，发现海洋中尺度涡旋引起的长锋面内孤立波（ISW）畸变现象。受卫星观测的启发，作者利用完全非静力和非线性的MITgcm进行了数值试验，研究了孤立气旋或反气旋涡旋对ISW的扰动。结果表明，由于海洋涡旋两侧的减速和加速作用，使ISW锋发生畸变。沿波前的ISW能量沿着被聚焦到形成凹（凸）图案的波碎片上（从其散射），并且在ISW传播远离涡旋之后，在聚焦区域中先前累积的能量逐渐释放。由于能量沿锋面沿着重新分布，涡旋对ISW振幅有很大的调制作用。赛...
AbstractWith the combined analysis of synthetic aperture radar image and satellite altimeter data collected in the northeastern South China Sea (SCS), this study found one type of distorted phenomenon of internal solitary wave (ISW) with the long front caused by the oceanic mesoscale eddy. Motivated by these satellite observations, the authors carried out numerical experiments using the fully nonhydrostatic and nonlinear MITgcm to investigate the perturbation of ISWs by an isolated cyclonic or anticyclonic eddy. The results show that the ISW front is distorted by these oceanic eddies due to the retardation and acceleration effects at their two sides. The ISW energy along the front is focused onto (scattered from) the wave fragment where a concave (convex) pattern is formed, and the previously accumulated energy in the focusing region is gradually released after the ISW propagates away from the eddies. The ISW amplitude is modulated greatly by the eddies due to the energy redistribution along the front. Se...