Journal of Marine Sciences ›› 2016, Vol. 34 ›› Issue (4): 1-9.DOI: 10.3969/j.issn.1001-909X.2016.04.001

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Study on the form of internal solitary wave in Dongsha area of the South China Sea

XU Song-yun1, XU Hui-ping2, GENG Ming-hui1, GUAN Yong-xian3   

  1. 1. State Key Laboratory of Marine Geology,School of Ocean and Earth Science,Tongji University, Shanghai 200092,China;
    2. Institute of Deep-sea Science and Engineering,Chinese Academy of Sciences,Sanya 572000,China;
    3. Key Laboratory of Marine Mineral Resource,Ministry of Land and Resources,Guangzhou Marine Geological Survey,Guangzhou 510760,China
  • Received:2016-09-24 Revised:2016-11-24 Online:2016-12-15 Published:2022-11-24

Abstract: Based on multi-channel seismic profiles and MODIS images, the form of internal solitary wave (ISW) packets in Dongsha area of the South China Sea was studied. There are two polar waves: elevation and depression wave, and internal solitary waves can be divided into “bell shape”, “flat shape” and “bowl shape” according to the waveforms. The shape of wave trough is associated with amplitude. Influenced by various factors, the solitions will develop into packets within the propagation process. Two typical wave packets are observed at different locations in Dongsha area: rank-ordered ISW packet and more complex ISW packet, and combined with their locations and propagation, they are considered to be two stages of the propagation process from deep sea to shelf. A rank-ordered wave packet is influenced by submarine topography, Dongsha Reef and wave-wave interaction after Dongsha Island, then turns into a more complex wave packet.

Key words: Dongsha Reef, internal solitary wave packet, waveform, propagation process

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