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Marine seismic observation of internal solitary wave packets in the northeast South China Sea

Tang, Qunshu; Hobbs, Richard; Wang, Dongxiao; Sun, Longtao; Zheng, Chan; Li, Jiabiao; Dong, Chongzhi

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Authors

Qunshu Tang

Richard Hobbs

Dongxiao Wang

Longtao Sun

Chan Zheng

Jiabiao Li

Chongzhi Dong



Abstract

Recently the novel seismic oceanography method has been reported to be an effective way to study the energetic internal solitary waves (ISWs) in the northern South China Sea. An optimized seismic-oceanographic cruise was carried out to observe such near-surface ISWs on Dongsha Plateau in July 2014. Several soliton trains rather than single solitons were captured using the seismic technique. After seismic data processing, one prototypical rank-ordered ISW packet on northeast side of Dongsha Island was clearly identified for further analysis. This included waveforms, propagation velocities, and vertical velocities for individual solitons. In this study, an improved scheme was applied to derive the transient phase velocities from the seismic data which is verified from independent satellite and hydrographic data. Analytical predictions from Korteweg-de Vries equation fit better than the extended Korteweg-de Vries equation ignoring background currents. Our results show that the seismic method can be successfully used to image targets in shallow water below 40 m and that seismic oceanography is a promising technique for studying near-surface phenomena with high spatial resolution.

Citation

Tang, Q., Hobbs, R., Wang, D., Sun, L., Zheng, C., Li, J., & Dong, C. (2015). Marine seismic observation of internal solitary wave packets in the northeast South China Sea. Journal of Geophysical Research: Oceans, 120(12), 8487-8503. https://doi.org/10.1002/2015jc011362

Journal Article Type Article
Acceptance Date Dec 2, 2015
Online Publication Date Dec 9, 2015
Publication Date Dec 30, 2015
Deposit Date Jan 15, 2016
Publicly Available Date Mar 28, 2024
Journal Journal of Geophysical Research: Oceans
Print ISSN 2169-9291
Electronic ISSN 2169-9291
Publisher American Geophysical Union
Peer Reviewed Peer Reviewed
Volume 120
Issue 12
Pages 8487-8503
DOI https://doi.org/10.1002/2015jc011362
Keywords Internal solitary wave, South China Sea, Seismic oceanography.

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Copyright Statement
Qunshu Tang, Richard Hobbs, Dongxiao Wang, Longtao Sun, Chan Zheng, Jiabiao Li, Chongzhi Dong (2015), Marine seismic observation of internal solitary wave packets in the northeast South China Sea, Journal of geophysical research: Oceans, 120(12), 8487-8503, 10.1002/2015JC011362 (DOI). To view the published open abstract, go to http://dx.doi.org and enter the DOI.




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