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 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 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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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), and the NSFC-Shandong Joint Fund for Marine Science Research Centers (No. U1406401)
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Lin, F., Liang, C., Hou, Y. et al. Observation of interactions between internal tides and near-inertial waves after typhoon passage in the northern South China Sea. Chin. J. Ocean. Limnol. 33, 1279–1285 (2015). https://doi.org/10.1007/s00343-015-4253-0
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DOI: https://doi.org/10.1007/s00343-015-4253-0