Deep-sea Sediment Resuspension by Internal Solitary Waves in the Northern South China Sea

doi:10.1038/s41598-019-47886-y

	Deep-sea Sediment Resuspension by Internal Solitary Waves in the Northern South China Sea
	Jia, Yonggang 1,2,7; Tian, Zhuangcai 1,2; Shi, Xuefa 2,3; Liu, J. Paul 4; Chen, Jiangxin 2,5; Liu, Xiaolei 1,2,7; Ye, Ruijie 2,6; Ren, Ziyin 1,2; Tian, Jiwei 2,6
刊名	SCIENTIFIC REPORTS
	2019-08-20
卷号	9
ISSN号	2045-2322
DOI	10.1038/s41598-019-47886-y
英文摘要	Internal solitary waves (ISWs) can cause strong vertical and horizontal currents and turbulent mixing in the ocean. These processes affect sediment and pollutant transport, acoustic transmissions and man-made structures in the shallow and deep oceans. Previous studies of the role of ISWs in suspending seafloor sediments and forming marine nepheloid layers were mainly conducted in shallow-water environments. In summer 2017, we observed at least four thick (70-140 m) benthic nepheloid layers (BNLs) at water depths between 956 and 1545 m over continental slopes in the northern South China Sea. We found there was a good correlation between the timing of the ISW packet and variations of the deepwater suspended sediment concentration (SSC). At a depth of 956 m, when the ISW arrived, the near-bottom SSC rapidly increased by two orders of magnitude to 0.62 mg/l at 8 m above the bottom. At two much deeper stations, the ISW-induced horizontal velocity reached 59.6-79.3 cm/s, which was one order of magnitude more than the seafloor contour currents velocity. The SSC, 10 m above the sea floor, rapidly increased to 0.10 mg/l (depth of 1545 m) and 1.25 mg/l (depth of 1252 m). In this study, we found that ISWs could suspend much more sediments on deepwater areas than previously thought. Specifically, we estimated that ISWs could induce and suspend 78.7 Mt/yr of sediment from shelf to deep-sea areas of the northern South China Sea. The total amount of sediment resuspended by shoaling ISWs was 2.7 times that of river-derived sediment reaching the northern South China Sea. This accounted for 6.1% of the global river-discharged sediment (16.4% of that from Asian rivers) transported to the sea.
资助项目	Natural Science Foundation of China for the Open Research Cruise of the northern South China Sea[NORC2017-05]
WOS关键词	NEPHELOID LAYERS ; SUSPENDED SEDIMENT ; BOTTOM ; GENERATION ; TRANSPORT ; SOLITONS ; OCEAN ; BASIN ; BORES
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000481747100037
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/30080]
专题	自然资源部第一海洋研究所
通讯作者	Tian, Jiwei
作者单位	1.Ocean Univ China, Shandong Prov Key Lab Marine Environm & Geol Engn, Qingdao 266100, Shandong, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Shandong, Peoples R China 3.State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Shandong, Peoples R China 4.North Carolina State Univ, Dept Marine Earth & Atmospher Sci, Raleigh, NC 27695 USA 5.Qingdao Inst Marine Geol, Key Lab Gas Hydrate, Minist Nat Resources, Qingdao 266071, Shandong, Peoples R China 6.Ocean Univ China, CIMST, Phys Oceanog Lab, Qingdao 266100, Shandong, Peoples R China 7.Minist Educ, Key Lab Marine Environm & Ecol, Qingdao 266100, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Jia, Yonggang,Tian, Zhuangcai,Shi, Xuefa,et al. Deep-sea Sediment Resuspension by Internal Solitary Waves in the Northern South China Sea[J]. SCIENTIFIC REPORTS,2019,9.
APA	Jia, Yonggang.,Tian, Zhuangcai.,Shi, Xuefa.,Liu, J. Paul.,Chen, Jiangxin.,...&Tian, Jiwei.(2019).Deep-sea Sediment Resuspension by Internal Solitary Waves in the Northern South China Sea.SCIENTIFIC REPORTS,9.
MLA	Jia, Yonggang,et al."Deep-sea Sediment Resuspension by Internal Solitary Waves in the Northern South China Sea".SCIENTIFIC REPORTS 9(2019).