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

XU Song-yun; XU Hui-ping; GENG Ming-hui; GUAN Yong-xian

doi:10.3969/j.issn.1001-909X.2016.04.001

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

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

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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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XU Song-yun, XU Hui-ping, GENG Ming-hui, GUAN Yong-xian. Study on the form of internal solitary wave in Dongsha area of the South China Sea[J]. Journal of Marine Sciences. 2016, 34(4): 1-9 https://doi.org/10.3969/j.issn.1001-909X.2016.04.001

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