https://scholars.lib.ntu.edu.tw/handle/123456789/571880
標題: | Seismic oceanography study of internal solitary waves in the northeastern South China Sea Basin [南海海盆?北部?孤立波的地震海洋?研究] | 作者: | Fan W Song H Zhang K Hsu H Gong Y Sun S. HO-HAN HSU |
關鍵字: | Curve fitting; Oceanography; Phase velocity; Seismology; Common mid points; Fitting curves; Internal solitary waves; Pre-stack migration; South China sea; South China Sea basin; Wave forms; Solitons; internal wave; linearity; oceanography; phase velocity; prestack migration; reflectivity; seismic data; seismic wave; solitary wave; wave propagation; Pacific Ocean; South China Sea | 公開日期: | 2020 | 卷: | 63 | 期: | 7 | 起(迄)頁: | 2644-2657 | 來源出版物: | Acta Geophysica Sinica | 摘要: | In previous work, the internal solitary waves (ISWs)discovered by seismic oceanography are mostly near the Dongsha Island. This paper uses the method of seismic oceanography to find the ISWs in the basin for the first time in the northeastern South China Sea. The pre-stack migration is used to examine the changes of the ISWs structure. It is found that the ISWs waveforms are stable overall during the acquisition period. The shallow reflection of the ISWs has a relatively larger change than the deep. By improving the methods of the predecessors, the ISWs apparent phase velocity is calculated by pre-stack migration profile using the Common Offset Gather (COG). The fitting curve of CMP (Common Mid-Point)-shot point pairs using this method has a better linearity than that using Common Offset Gather directly. The apparent phase velocity of this ISWs using the improved method is 0.82 m?s-1, and the apparent direction of the ISWs propagation is from NW to SE (172°N, 0° pointing north). ? 2020, Science Press. All right reserved. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85094175893&doi=10.6038%2fcjg2020N0358&partnerID=40&md5=4e96cfe6f31413eac36442c88ec1253c https://scholars.lib.ntu.edu.tw/handle/123456789/571880 |
ISSN: | 15733 | DOI: | 10.6038/cjg2020N0358 |
顯示於: | 海洋研究所 |
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