| Activity and Formation of Sand Waves on Northern South China Sea Shelf | |
| Luan Xiwu1; Peng Xuechao2; Wang Yingmin3; Qiu Yan2 | |
| 2010-02-01 | |
| 发表期刊 | JOURNAL OF EARTH SCIENCE
 |
| 卷号 | 21期号:1页码:55-70 |
| 文章类型 | Article |
| 摘要 | Sand waves on the northern South China Sea shelf had been considered as stable relict bed form. For the industry use of sea bed between stations LF13-2 and LF13-1, a new round of explorations were conducted. The newly obtained data show that both spacings and amplitudes of sand waves are all systematically changing with water depth. Repeated observations since 2003 to 2004 showed that the sea bed is currently active. Due to strong erosion of surface sediment since Dongsha ((sic)) uplifting, there are almost no modern sediments on the shelf of Dongsha area. Sand materials in the study area mainly originate from the erosion of the bed sediment formation. The water depth increment revealed by repeated echo sounder data is mainly due to erosion. Bottom currents are quite complex in the area of Dongsha underwater plateaus. At site 9MKII, the southward ebb current is stronger than the northward flood current, while at site AEM-HR, the WNW-ward flood current is slightly stronger than the ESE-ward ebb current. At site 9MKII, the maximum bottom current speed is 48 cm/s, and 22% of the observed bottom current speeds are larger than 20 cm/s, which meet the minimum bottom current speed required for the creation of sand wave. This article points out that present-day oceanographic condition couples well with the sand-wave morphologies, and that the sand waves are to a great extent in equilibrium with the ongoing present-day oceanographic bottom current condition and active. |
| 关键词 | Sand Wave Northern South China Sea Shelf Activity Formation |
| DOI | 10.1007/s12583-010-0005-4 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000274142600005 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/32674 |
| 专题 | 海洋地质与环境重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China 2.Minist Land & Resources, Guangzhou Marine Geol Survey, Guangzhou 510760, Guangdong, Peoples R China 3.China Univ Petr, Basin & Reservoir Res Ctr, Beijing 102249, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Luan Xiwu,Peng Xuechao,Wang Yingmin,et al. Activity and Formation of Sand Waves on Northern South China Sea Shelf[J]. JOURNAL OF EARTH SCIENCE,2010,21(1):55-70. |
| APA | Luan Xiwu,Peng Xuechao,Wang Yingmin,&Qiu Yan.(2010).Activity and Formation of Sand Waves on Northern South China Sea Shelf.JOURNAL OF EARTH SCIENCE,21(1),55-70. |
| MLA | Luan Xiwu,et al."Activity and Formation of Sand Waves on Northern South China Sea Shelf".JOURNAL OF EARTH SCIENCE 21.1(2010):55-70. |
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