Sound Speed Structure Models of Seafloor Sediments in the Southern South China Sea

	Sound Speed Structure Models of Seafloor Sediments in the Southern South China Sea
	Wang Jingqiang 1; Han Guozhong 1; Xie Qiuhong 1; Guo Changsheng 2; Hou Zhengyu 2; Liu Baohua 3
	2016
关键词	seafloor sediment sound speed structure model the south Southern China Sea physical property
英文摘要	The various sedimentary environments and the several sediment sources indicate that seafloor sediments in the southern South China Sea have unique acoustic research significance. The direct sound speed measurements of seafloor sediments are particularly valuable for this study sea, which lacks acoustic data. In order to characterize and develop the sound speed structure models locally depending on sedimentary environment and sediment texture in the southern South China Sea, sound speeds and physical parameters of 21 sediment cores were measured, and vertical distributions of sound speeds and physical properties were obtained. The vertical variations of physical properties and sound speeds indicate that there were obvious differences among the seafloor sediments in Sunda Shelf, in the continental slope and in the Nansha Trough. The sound speed structure models were classified in several categories according to the vertical variations of sound speed, texture parameter and stratified structure of sediments. The categories included: the trough-stratified model; trough-unstratified model; slope-stratified model; slope-unstratified model; shelf-stratified model; and, shelf-unstratified model. The comparison of results indicates that the clay-silt sediments have smaller vertical variation gradient, while the silt-clay and sand-silt sediments have larger variation gradient. These sound speed structure models can reveal the unique acoustic environment significance of surface sediments - at the interface of seawater and the seafloor - and will really be of great help to determine the acoustic properties of seafloor sediments and to populate data relating to the study sea area.
会议录	2016 IEEE/OES CHINA OCEAN ACOUSTICS SYMPOSIUM (COA)
会议录出版者	IEEE
会议录出版地	345 E 47TH ST, NEW YORK, NY 10017 USA
语种	英语
WOS研究方向	Acoustics ; Engineering
WOS记录号	WOS:000390300800001
WOS关键词	IN-SITU ; MARINE-SEDIMENTS ; ACOUSTIC PROPERTIES ; EEL RIVER ; VELOCITY ; CALIFORNIA ; SHELF ; OCEAN
内容类型	会议论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/26806]
专题	自然资源部第一海洋研究所
通讯作者	Wang Jingqiang
作者单位	1.SOA, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China 3.State Ocean Adm, Natl Deep Sea Ctr, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Wang Jingqiang,Han Guozhong,Xie Qiuhong,et al. Sound Speed Structure Models of Seafloor Sediments in the Southern South China Sea[C]. 见:.