A 2D-numerical modeling of the generation and propagation of internal solitary waves in the Luzon Strait

作     者：WANG Gang QIAO Fangli DAI Dejun WANG Gang1,QIAO Fangli1,DAI Dejun1 1 Key laboratory of Marine Science and Numerical Modeling (MASNUM),First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China

作者机构：Key laboratory of Marine Science and Numerical Modeling （MASNUM） First Institute of Oceanography State Oceanic Administration Qingdao 266061 China 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2010年第29卷第6期

页      面：1-11页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 08[工学] 081202[工学-计算机软件与理论] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：the National Natural Science Foundation of China under contract Nos 41006018 and 40730842 the National High Technology Research and Development Program (863 Program) of China under contract No.2008AA09A402 Open Fund of the Key Laboratory of Ocean Circulation and Waves,CAS under contract No.KLOCAW0905 Basic Natural Research Found of the First Institute of Oceanography,SOA under contract No.GY02-2009G08 

主　　题：internal solitary waves Luzon Strait Synthetic Aperture Radar 

摘      要：The wide presence of internal solitary waves （ISWs） in the northern South China Sea （SCS） has been confirmed by both Synthetic Aperture Radar （SAR） images and in situ *** ISWs are believed being generated over the varying topography in the Luzon *** typically propagate westwards into the SCS with a diurnal or semidiurnal *** generation sites are,however,not yet solidly *** obtain a clear picture of the ISWs,we designed numerical experiments to analyze the generation and propagation of the ISWs in the Luzon Strait using a 2-dimensional non-hydrostatic *** model current is forced by barotropic or baroclinic currents imposed at open *** experiments show that the tidal current serves as a kind of triggering force for the ISWs over the submarine ridges in the *** the forcing of tidal currents,depressions are formed near the *** ISWs then split from the depressions through a process different from lee-wave generation *** appearance of the ISWs is influenced by the strength and period of the forcing current： the ISWs are more likely to be generated by a stronger tidal *** is why the ISWs in the Luzon Strait are frequently observed during spring *** with diurnal tidal current,the ISWs generated by semidiurnal tidal current with the same amplitude is much more *** is partly because that the wave beams in diurnal frequency have a larger angle with the vertical direction,thus are more likely to be reflected by the topography *** impact of the Kuroshio to the ISWs is also analyzed by adding a vertical uniform or shear current at boundaries.A vertically uniform current may generate ISWs *** the other hand,a vertically shear current,which is more realistic to represent the Kuroshio branch,seems to have little influence on the generation process and radiating direction of the ISWs in the Luzon Strait.