| Mooring observations of internal solitary waves in the deep basin west of Luzon Strait |
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| 作者姓名： | HUANG Xiaodong ZHAO Wei TIAN Jiwei YANG Qingxuan |
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| 作者单位： | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China;Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China;Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China;Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China |
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| 基金项目： | The Program for New Century Excellent Talents in Universities of China under contract No. NCET-10-0764;the National High Technology Research and Development (863) Program of China under contract No. 2013AA09A502;the National Natural Science Foundation of China under contract Nos 41176010, 91028008, 40890153, 41176008 and 40776005. |
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| 摘 要： | A total of 137 internal solitary waves （ISWs） are captured during a field experiment conducted in the deep basin west of the Luzon Strait （LS） from March to August, 2010. Mooring observations reveal that a fully developed ISW owns a maximum westward velocity of more than 1.8 m/s and an amplitude of about 200 m. The ISWs in the South China Sea （SCS） are most active in July, which may be due to the strong stratification in summer. Most of the ISW episodes are detected around and after the 1st or 15th lunar day, indicating that the ISW in the SCS is triggered by astronomic tides. Half part of the observed ISWs were detected around 19：00 local time, which can be explained by the fact that type-a ISWs emerged in the evening at roughly the same time each day. The propagation direction of the ISWs and the astronomic tides in the LS show that the area south of the Batan Island is probably the main source region of the type-a ISWs, while the area south of Itbayat Island and south of the Batan Island is likely the main source region of the type-b ISWs observed at the mooring. Moreover, for the resonance of semidiurnal internal tides emitting from the double ridges in the LS, the underwater ridge south of the Itbayat Island and south of the Batan Island is believed to favor the generation of the energetic ISWs.
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| 关 键 词： | 吕宋海峡 内孤立波 锚泊 港池 天文潮汐 最大速度 中国南海 传播方向 |
| 收稿时间： | 2012/12/18 0:00:00 |
| 修稿时间： | 5/6/2013 12:00:00 AM |
Mooring observations of internal solitary waves in the deep basin west of Luzon Strait |
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| HUANG Xiaodong,ZHAO Wei,TIAN Jiwei,YANG Qingxuan.Mooring observations of internal solitary waves in the deep basin west of Luzon Strait[J].Acta Oceanologica Sinica,2014,33(3):82-89. |
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| Authors: | HUANG Xiaodong ZHAO Wei TIAN Jiwei and YANG Qingxuan |
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| Institution: | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, China |
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| Abstract: | A total of 137 internal solitary waves (ISWs) are captured during a field experiment conducted in the deep basin west of the Luzon Strait (LS) from March to August, 2010. Mooring observations reveal that a fully developed ISW owns a maximum westward velocity of more than 1.8 m/s and an amplitude of about 200 m. The ISWs in the South China Sea (SCS) are most active in July, which may be due to the strong stratification in summer. Most of the ISW episodes are detected around and after the 1st or 15th lunar day, indicating that the ISW in the SCS is triggered by astronomic tides. Half part of the observed ISWs were detected around 19:00 local time, which can be explained by the fact that type-a ISWs emerged in the evening at roughly the same time each day. The propagation direction of the ISWs and the astronomic tides in the LS show that the area south of the Batan Island is probably the main source region of the type-a ISWs, while the area south of Itbayat Island and south of the Batan Island is likely the main source region of the type-b ISWs observed at the mooring. Moreover, for the resonance of semidiurnal internal tides emitting from the double ridges in the LS, the underwater ridge south of the Itbayat Island and south of the Batan Island is believed to favor the generation of the energetic ISWs. |
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| Keywords: | internal solitary wave South China Sea observation nonlinear internal wave |
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