Internal solitary wave refraction at Dongsha Atoll, South China Sea
Internal solitary wave refraction at Dongsha Atoll, South China Sea
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DOI：
10.1002/grl.50614
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发表时间：
2013-06
影响因子：
5.2
通讯作者：
Xiaofeng Li;Christopher R. Jackson;W. Pichel
中科院分区：
文献类型：
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作者：
Xiaofeng Li;Christopher R. Jackson;W. Pichel
内孤立波（ISWs）在吕宋海峡有规律地产生，向西传播进入南海，持续4天以上后在大陆架上消散。东沙环礁位于其传播路径的中间，事件ISW在与环礁相互作用并经过环礁时分叉。当两臂在东沙西侧相遇时，它们产生了非线性内波相互作用的复杂图案。在这项研究中，提出了新的卫星观测资料，显示了在东沙环礁异常的ISW折射模式。在这些卫星图像中，入射波位于东沙的一侧，最靠近环礁的部分波继续绕环礁圆周传播，而臂的其余部分继续向西传播。利用ISW相速度与海洋深度的关系函数充分模拟了这一过程。
Internal solitary waves (ISWs) are regularly generated at the Luzon Strait, propagate westward into the South China Sea, and dissipate on the continental shelf after persisting for more than 4 days. The Dongsha Atoll stands in the middle of their propagation path and the incident ISW bifurcates as it interacts with, and passes the atoll. As the two arms meet on the western side of Dongsha, they produce complex patterns from nonlinear internal wave interactions. In this study, new satellite observations are presented that show unusual ISW refraction patterns at the Dongsha Atoll. In these satellite images the incident wave is located on one side of Dongsha, and the portion of the wave closest to the atoll continues to propagate around the atoll circularly, while the remaining portion of the arm continues its westward propagation. The process is adequately modeled using a function relating ISW phase speed to ocean depth.