Sediment resuspension in winter in an exceptional low suspended sediment concentration area off Qinhuangdao in the Bohai Sea

doi:10.1016/j.ecss.2020.106859

IOCAS-IR > 海洋环流与波动重点实验室

	Sediment resuspension in winter in an exceptional low suspended sediment concentration area off Qinhuangdao in the Bohai Sea
	Jiang, Man 1,2; Pang, Chongguang 1,3,4; Liu, Zhiliang 5; Jiang, Jingbo 1,3,4
	2020-10-30
发表期刊	ESTUARINE COASTAL AND SHELF SCIENCE
ISSN	0272-7714
卷号	245 页码:16
通讯作者	Pang, Chongguang([email protected])
摘要	Seawater with low suspended sediment concentration (SSC) and high salinity dominates the sea area off Qinhuangdao all year round, especially in winter, which is an exceptional case since most of the coastal waters in the Bohai Sea are turbid. Being one of the most famous coastal tourist resorts in the area, it is crucial to keep the seawater around Qinhuangdao clear and unpolluted. Three bottom-mooring systems were deployed in the low SSC region from February to March 2017 for up to 22 days to reveal the processes and mechanisms of local sediment resuspension. The observation results showed that during the strongest wind of the whole deployment period, the sediment resuspension process included a turbulent resuspension event that occurred in the high turbulent kinetic energy period, and a continuous resuspension event when the bed shear stress (BSS) was larger than critical. The turbulent resuspension event was characterised by high-turbidity resuspension of sediments near the bed in the form of pulsation, with a depth of influence not more than the thickness of the bottom boundary layer. It was found to be triggered by strong turbulence driven by storm winds. In contrast the continuous resuspension could be attributed to high wave-dominated BSS. During storm winds, high concentrations of suspended sediment in the upper and middle layers appeared to lag the wind speed by about 8-10 h. In contrast, the turbulent resuspension event occurred at the same time as the strong winds. In-situ measurements from all three moorings indicate that it is the local weak sediment resuspension, even under the influence of storm winds in winter, that causes the formation of the low SSC area off Qinhuangdao.
关键词	Turbulent resuspension event High turbulent kinetic energy Wave-dominated bed shear stress Bottom-mooring observation system Bohai sea
DOI	10.1016/j.ecss.2020.106859
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41576060]; National Key R&D Program of China[2019YFC1407903]; National Key R&D Program of China[2016YFC0301203]; Natural Science Foundation of China[U1406401]; Natural Science Foundation of Shandong Province[U1406401]; Hebei Science and Technology Project[19273301D]; Research Foundation for Advanced Talents[2019Y8020]
WOS研究方向	Marine & Freshwater Biology ; Oceanography
WOS类目	Marine & Freshwater Biology ; Oceanography
WOS记录号	WOS:000582677500005
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/169208
专题	海洋环流与波动重点实验室
通讯作者	Pang, Chongguang
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Ocean & Climate Dynam, Qingdao 266237, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 5.Hebei Normal Univ Sci & Technol, Inst Marine Sci & Technol, Qinhuangdao 066600, Hebei, Peoples R China
第一作者单位	海洋环流与波动重点实验室
通讯作者单位	海洋环流与波动重点实验室; 中国科学院海洋大科学研究中心
推荐引用方式 GB/T 7714	Jiang, Man,Pang, Chongguang,Liu, Zhiliang,et al. Sediment resuspension in winter in an exceptional low suspended sediment concentration area off Qinhuangdao in the Bohai Sea[J]. ESTUARINE COASTAL AND SHELF SCIENCE,2020,245:16.
APA	Jiang, Man,Pang, Chongguang,Liu, Zhiliang,&Jiang, Jingbo.(2020).Sediment resuspension in winter in an exceptional low suspended sediment concentration area off Qinhuangdao in the Bohai Sea.ESTUARINE COASTAL AND SHELF SCIENCE,245,16.
MLA	Jiang, Man,et al."Sediment resuspension in winter in an exceptional low suspended sediment concentration area off Qinhuangdao in the Bohai Sea".ESTUARINE COASTAL AND SHELF SCIENCE 245(2020):16.

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