Observation of internal tides and near-inertial motions in the upper 450 m layer of the northern South China Sea
Mooring ADCP current observations from August to November are used to study the barotropic tides, baroclinic tides and near-inertial motions in the upper 450 m layer of the northern South China Sea. The barotropic and baroclinic tides at the mooring station are all dominated by M2, K1, O1, P1, with the barotropic amplitudes being 7.8 cm·s-1, 7.0 cm·s-1, 5.4 cm·s-1 and 3.5 cm·s-1 respectively. The amplitudes of M2, K1, O1, P1 internal tides vary greatly, which are 12-15 cm·s-1 in the thermocline, and then decrease with increasing depth. The amplitude of the barotropic near-iner- tial motions is less than 1 cm·s-1, contributing little to the barotropic currents. However, that of the baroclinic near- inertial motions can be as large as 5 cm·s-1. The inclination of tidal ellipse tends to increase with increasing depth, implying upward propagation of energy, while that of the near-inertial ellipse tends to decrease with increasing depth, implying downward propagation of energy.
作 者： LIANG Xinfeng ZHANG Xiaoqian TIAN Jiwei 作者单位： Physical Oceanography Laboratory of Ocean University of China, Qingdao 266003, China 刊 名： 科学通报（英文版） SCI 英文刊名： CHINESE SCIENCE BULLETIN 年，卷(期)： 2005 50(24) 分类号： P7 关键词： tide internal tide near-inertial motion South China Sea