| WANG Gang,QIAO Fangli,DAI Dejun,HOU Yijun. 2011. A possible generation mechanism of the strong current over the northwestern shelf of the South China Sea. Acta Oceanologica Sinica, (3):27－32 |
| A possible generation mechanism of the strong current over the northwestern shelf of the South China Sea |
| A possible generation mechanism of the strong current over the northwestern shelf of the South China Sea |
| Received:August 02, 2007 Revised:February 06, 2010 |
| DOI：10.1007/s13131-011-0116-5 |
| Key words:strong current internal waves Brunt-Väisälä frequency |
| 中文关键词: strong current internal waves Brunt-Väisälä frequency |
| 基金项目:the National Natural Science Foundation of China under contract Nos 41006018 and 40730842, The National Basic Research Program (973 Program) of China under contract No. 2011CB403502, the National High Technology Research and Development Program (863 Program) of China under contract No. 2008AA09A402, Open Fund of the Key Laboratory of Ocean Circulation and Waves, Chinese Academy of Sciences under contract No. KLOCAW0905. |
| Author Name | Affiliation | E-mail | | WANG Gang | Key laboratory of Data Analysis and Applications(LDAA), Key laboratory of Marine Science and Numerical Modeling(MASNUM), First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | | QIAO Fangli | Key laboratory of Data Analysis and Applications(LDAA), Key laboratory of Marine Science and Numerical Modeling(MASNUM), First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | qiaofl@fio.org.cn | | DAI Dejun | Key laboratory of Data Analysis and Applications(LDAA), Key laboratory of Marine Science and Numerical Modeling(MASNUM), First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | | HOU Yijun | Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China | |
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| Abstract: |
| Continuous observation in late April 2005 on the northwestern shelf of the South China Sea reveals vigorous strong currents, the maximum velocity of which exceeds 3.8 m/s. The strong currents occurred around spring tide period, when the internal tide waves were also expected to be vigorous. Analysis shows that the major peaks of the current power spectrum are in low frequency band. Using a numerical method applied to the actual ocean stratification, we find that the amplitude profiles of the strong current are similar to that of the currents induced by some low-mode internal waves (at diurnal or semi-diurnal frequency). It indicates that the temporal and spatial features of strong currents were possibly induced by low frequency internal waves. |
| 中文摘要: |
| Continuous observation in late April 2005 on the northwestern shelf of the South China Sea reveals vigorous strong currents, the maximum velocity of which exceeds 3.8 m/s. The strong currents occurred around spring tide period, when the internal tide waves were also expected to be vigorous. Analysis shows that the major peaks of the current power spectrum are in low frequency band. Using a numerical method applied to the actual ocean stratification, we find that the amplitude profiles of the strong current are similar to that of the currents induced by some low-mode internal waves (at diurnal or semi-diurnal frequency). It indicates that the temporal and spatial features of strong currents were possibly induced by low frequency internal waves. |
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