IOCAS-IR  > 海洋环流与波动重点实验室
Footprints of obliquely incident internal solitary waves and internal tides near the shelf break in the northern South China Sea
Ma, Xiaochuan1,2; Yan, Jun1; Hou, Yijun3; Lin, Feilong4; Zheng, Xufeng5
2016-12-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
Volume121Issue:12Pages:8706-8719
SubtypeArticle
AbstractA mooring system and two sites of bottom currents were deployed over the slope and near the shelf break on the propagating paths of internal solitary waves (ISWs), west off Dongsha Atoll in the northern South China Sea. Data indicated that energetic ISWs obliquely shoaled onto the shelf west off Dongsha Atoll in an approximately 290 degrees direction, causing strong reversing currents (some exceeding 80 cm/s) near the bottom. Two types of sandwaves and short scour channels are discernible on the seafloor near the shelf break, which have reasonable correlations with the obliquely incident ISWs and internal tides. Type 1 sandwaves, featured by ISWs at the depths of 130-150 m, have flat crests interacting with the isobaths at an angle of nearly 45 degrees which slightly incline and migrate upslope. Type 2 sandwaves are associated with internal tides, which have crests parallel to the isobaths and distinctly incline and migrate downslope. Short channels are parallel to the depth contours and truncate the strata, which could be formed and maintained by along-slope currents that are probably produced by the obliquely ISWs on a large gradient (gamma>0.8 degrees). The ISWs can move coarse grains or suspend fine grains but do not change the long-term trend of sediment transport on the seabed with larger gradients (gamma/c>1), which is dominated by internal tides. These features are likely widespread near the shelf break in the northern South China Sea and other seas but are limited on mild slopes where ISWs do not break.
DOI10.1002/2016JC012009
Indexed BySCI
Language英语
WOS IDWOS:000393140400016
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/136313
Collection海洋环流与波动重点实验室
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
4.SOA, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou, Zhejiang, Peoples R China
5.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou, Guangdong, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Ma, Xiaochuan,Yan, Jun,Hou, Yijun,et al. Footprints of obliquely incident internal solitary waves and internal tides near the shelf break in the northern South China Sea[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2016,121(12):8706-8719.
APA Ma, Xiaochuan,Yan, Jun,Hou, Yijun,Lin, Feilong,&Zheng, Xufeng.(2016).Footprints of obliquely incident internal solitary waves and internal tides near the shelf break in the northern South China Sea.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,121(12),8706-8719.
MLA Ma, Xiaochuan,et al."Footprints of obliquely incident internal solitary waves and internal tides near the shelf break in the northern South China Sea".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 121.12(2016):8706-8719.
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