| CHEN Ju,WANG Dongxiao,SHI Ping,DU Yan. 2007. A survey of baroclinic tides in the Beibu Gulf in the South China Sea. Acta Oceanologica Sinica, (4):7－19 |
| A survey of baroclinic tides in the Beibu Gulf in the South China Sea |
| A survey of baroclinic tides in the Beibu Gulf in the South China Sea |
| Received:December 12, 2006 Revised:May 14, 2007 |
| DOI： |
| Key words:vertical structure baroclinic tidal current Beibu Gulf |
| 中文关键词: vertical structure baroclinic tidal current Beibu Gulf |
| 基金项目: |
| Author Name | Affiliation | E-mail | | CHEN Ju | Key Laboratory of Tropical Marine and Environmental Dynamics, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | jchen@scsio.ac.cn | | WANG Dongxiao | Key Laboratory of Tropical Marine and Environmental Dynamics, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | | | SHI Ping | Key Laboratory of Tropical Marine and Environmental Dynamics, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | | | DU Yan | Key Laboratory of Tropical Marine and Environmental Dynamics, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | |
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| Abstract: |
| The principal characteristics of the tides are investigated by a shipborne acoustic Doppler current Profiler at a fixed station located in the Beibu Gulf from 4 to 14 April 2003. Data analysis indicates that the diurnal tidal currents dominate local current variations at the observing site. Except the barotropic M2 constituent, four principal tides comprise both back-and-forth barotropic and baroclinic tidal currents. The baroclinic tidal ellipse parameters vary with depth, showing complicate features, rather than monotonous features being figured. For baroclinic tidal constituents, vertical modes are different to each other. Similarly, the semi-major axes of the tidal constituents vary with depth. In the lower layer, a nonlinear regression approach is used to calculate and obtain the SEMA profiles of diurnal tidal constituents. Results show that in the thin bottom boundary layer, all of the parameters vary drastically with depth, totally distinguished from the vertical profiles above. |
| 中文摘要: |
| The principal characteristics of the tides are investigated by a shipborne acoustic Doppler current Profiler at a fixed station located in the Beibu Gulf from 4 to 14 April 2003. Data analysis indicates that the diurnal tidal currents dominate local current variations at the observing site. Except the barotropic M2 constituent, four principal tides comprise both back-and-forth barotropic and baroclinic tidal currents. The baroclinic tidal ellipse parameters vary with depth, showing complicate features, rather than monotonous features being figured. For baroclinic tidal constituents, vertical modes are different to each other. Similarly, the semi-major axes of the tidal constituents vary with depth. In the lower layer, a nonlinear regression approach is used to calculate and obtain the SEMA profiles of diurnal tidal constituents. Results show that in the thin bottom boundary layer, all of the parameters vary drastically with depth, totally distinguished from the vertical profiles above. |
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