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LIN Feilong, LIANG Chujin, HOU Yijun, LIU Yahao, LIU Ze, HU Po. Observation of interactions between internal tides and nearinertial waves after typhoon passage in the northern South China Sea[J]. Journal of Oceanology and Limnology, 2015, 33(5): 1279-1285 |
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Observation of interactions between internal tides and nearinertial waves after typhoon passage in the northern South China Sea |
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| LIN Feilong1,2, LIANG Chujin2, HOU Yijun1, LIU Yahao1, LIU Ze1, HU Po1 |
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1 Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;
2 State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Hangzhou 310012, China |
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| Abstract: |
| 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 highfrequency 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 NIWs.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 fD1 and fD2. |
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| Key words:
internal tides|near-inertial waves|typhoon|nonlinear interaction|South China Sea
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| Received: 2014-09-28 Revised: 2015-01-03 |
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