Observation of interactions between internal tides and near-inertial waves after typhoon passage in the northern South China Sea

作     者：蔺飞龙 梁楚进 侯一筠 刘亚豪 刘泽 胡珀 

作者机构：Key Laboratory of Ocean Circulation and WavesInstitute of OceanologyChinese Academy of Sciences State Key Laboratory of Satellite Ocean Environment DynamicsSecond Institute of Oceanography 

出 版 物：《Chinese Journal of Oceanology and Limnology》 (中国海洋湖沼学报（英文版）)

年 卷 期：2015年第33卷第5期

页      面：1279-1285页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 

基　　金：Supported by the National Natural Science Foundation of China(Nos.U1133001,41030855,41376027) the National High Technology Research and Development Program of China(863 Program)(No.2013AA09A502) the NSFC-Shandong Joint Fund for Marine Science Research Centers(No.U1406401) 

主　　题：internal tides near-inertial waves typhoon nonlinear interaction South China Sea 

摘      要：During the observational period of our study, Typhoon Hagupit passed over the mooring site and induced strong near-inertial waves （NIWs）, which provided an opportunity to investigate the interactions between internal tides （ITs） and NIWs. Based on the mooring data, we compared the current spectra during the typhoon period and non-typhoon period in the northern South China Sea, and found that the high- frequency waves （fD1 and fD2） were evident during the former. Moreover, the observations of the current revealed that fD1 and fD2 occurred near the depth of strong vertical shear in the NlWs. In order to confirm the generation mechanism of fD1 and fD2, we compared the positions of strong vertical shear in the NIWs and strong vertical velocity in the ITs. It was established that the vertical shear of the horizontal current of the NIWs and the vertical current of the ITs contributed to the generation of fDt and fD2.