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WANG Gang,ZHENG Quanan,LIN Min,DAI Dejun,QIAO Fangli. 2015. Three dimensional simulation of internal wave attractors in the Luzon Strait. Acta Oceanologica Sinica, 34(11):14-21
Three dimensional simulation of internal wave attractors in the Luzon Strait
吕宋海峡内波吸引子的三维数值模拟
Received:March 19, 2015  Revised:May 22, 2015
DOI:10.1007/s13131-015-0744-2
Key words:Internal wave attractor  non-hydrostatic  wave beam  Luzon Strait
中文关键词:  内波吸引子  非静压  波射线  吕宋海峡
基金项目:The National Basic Research Program (973 Program) of China under contract No. 2011CB403502; the Major National Scientific Research Projects of China under contract No. 2012CB957803; the National Natural Science Foundation of China under contract No 41476024; the National Natural Science Foundation of China-Shandong Joint Fund of Marine Science Research Centers of China under contract No. U1406404; the Foundation for Outstanding Young and Middle-aged Scientists in Shandong Province of China under contract No. BS2011HZ019.
Author NameAffiliationE-mail
WANG Gang Key Laboratory of Marine Science and Numerical Modeling (MASNUM), the First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
Key Laboratory of Data Analysis and Applications, the First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China 
wangg@fio.org.cn 
ZHENG Quanan Department of Atmospheric and Oceanic Science, University of Maryland, College Park, Maryland 20742, USA  
LIN Min Department of Mathematics, Ocean University of China, Qingdao 266100, China  
DAI Dejun Key Laboratory of Marine Science and Numerical Modeling (MASNUM), the First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
Key Laboratory of Data Analysis and Applications, the First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China 
 
QIAO Fangli Key Laboratory of Marine Science and Numerical Modeling (MASNUM), the First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China  
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Abstract:
      Internal waves propagate along wave beams that are inclined with respect to the horizontal plane. It is conjectured that the internal waves generated in the Luzon Strait may be confined between the double ridges in the strait and concentrate to a closed trajectory, the so-called internal wave attractor, due to the reflection of wave beams from the lateral boundaries, sea surface and bottom. This work carried out two experiments using a three dimensional non-hydrostatic general circulation model, MITgcm, to investigate the possibility that the ridges in the Luzon Strait allows for internal wave attractors. Baroclinic current in both of the experiments demonstrate the forming of ring-like patterns in some section around 20° and 21°N, indicating that the development of the internal wave attractors are allowed in the Luzon Strait. The different resolutions and initial conditions in the two experiments also reveal that the internal-wave-attractor phenomenon is robust in this region.
中文摘要:
      内波沿着与水平面形成一定夹角的波射线进行传播.吕宋海峡生成的内波在传播过程中,其波射线在海面、海底及双海脊区域会发生反射,从而波射线可能会陷于双海脊之间,并在反射中逐步收敛到一个闭合的轨道,即内波吸引子.本文利用海洋环流模式MITgcm进行了两个三维非静压数值试验,来探讨吕宋海峡双海脊区域生成内波吸引子现象的可能性.两个数值试验的分辨率、初始场、驱动场等条件具有明显差异,但两者的输出结果都在20°N和21°N附近的一些断面上发现了斜压流形成的环形结构.这表明吕宋海峡具备生成内波吸引子的条件,并且温盐场、背景潮流等因素的小扰动不会影响到该现象的存在性.
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