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Upper ocean near-inertial response to 1998 Typhoon Faith in the South China Sea

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During the South China Sea monsoon experiment (SCSMEX), three autonomous temperature line acquisition system (ATLAS) buoys with acoustic Doppler current profiler (ADCP) were moored in the South China Sea to measure temperature, salinity and current velocity. Typhoon Faith passed through about 250 km south to one of the mooring buoys located at 12°58.5′N, 114°24.5′E from December 11 to 14, 1998. The data analysis indicates that the typhoon winds induce a great increase in the kinetic energy at near-inertial frequencies with two maxima in the mixed layer and thermocline. The near-inertial oscillations were observed at the upper 270 m in the wake of Typhoon Faith. The oscillations were originally excited in the sea surface layer and propagated downward. The amplitudes of the oscillations decrease with depth except in the thermocline. The near-inertial oscillation signals are also remarkable in temperature and salinity fields.

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Correspondence to Dongxiao Wang.

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Foundation item: The National Natural Science Foundation of China under contract Nos 40976013 (for Sun and Hu) and 40830851 (for Wang); the Knowledge Innovation Project for Distinguished Young Scholar of the Chinese Academy of Sciences No. KZCX2-EW-QN203 (for Sun); the National Basic Research Program (“973” Program) of China under contract No. 2011CB403504 (for Wang); and the National Science Foundation of the United States of America under contract No. AGS-1061998 (for Zheng).

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Sun, L., Zheng, Q., Tang, TY. et al. Upper ocean near-inertial response to 1998 Typhoon Faith in the South China Sea. Acta Oceanol. Sin. 31, 25–32 (2012).

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