Characteristics and temporal variations of near-bottom currents near the Dongsha Island in the northern South China Sea

doi:10.1007/s13131-019-1415-5

CORC > 自然资源部第一海洋研究所 > 自然资源部第一海洋研究所 > 业务部门 > 海洋环境与数值模拟研究室

	Characteristics and temporal variations of near-bottom currents near the Dongsha Island in the northern South China Sea
	Li, Dawei 1,2; Wei, Zexun 1,2; Wang, Yonggang 1,2; Li, Shujiang 1,2; Xu, Tengfei 1,2; Wang, Guanlin 1,2; Teng, Fei 1,2
刊名	ACTA OCEANOLOGICA SINICA
	2019-04
卷号	38 期号:4 页码:80-89
关键词	tidal currents South China Sea near-bottom currents mesoscale eddies
ISSN号	0253-505X
DOI	10.1007/s13131-019-1415-5
英文摘要	Near-bottom currents play important roles in the formation and dynamics of deep-water sedimentary systems. This study examined the characteristics and temporal variations of near-bottom currents, especially the tidal components, based on two campaigns (2014 and 2016) of in situ observations conducted southeast of the Dongsha Island in the South China Sea. Results demonstrated near-bottom currents are dominated by tidal currents, the variance of which could account for similar to 70% of the total current variance. Diurnal tidal currents were found stronger than semidiurnal currents for both barotropic and baroclinic components. The diurnal tidal currents were found polarized with predominantly clockwise-rotating constituents, whereas the clockwise and counterclockwise constituents were found comparable for semidiurnal tidal currents. It was established that diurnal tidal currents could induce strong current shear. Baroclinic tidal currents showed pronounced seasonal variation with large magnitude in winter and summer and weak magnitude in spring and autumn in 2014. The coherent components accounted for similar to 65% and similar to 50% of the diurnal and semidiurnal tidal current variances, respectively. The proportions of the coherent and incoherent components changed little in different seasons. In addition to tidal currents, it was determined that the passing of mesoscale eddies could induce strong nearbottom currents that have considerable influence on the deep circulation.
资助项目	China Postdoctoral Science Foundation[2017M622111]
WOS研究方向	Oceanography
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000465374700009
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/18364]
专题	业务部门_海洋环境与数值模拟研究室
通讯作者	Wei, Zexun
作者单位	1.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Sci & Numer Modeling, Qingdao 266061, Shandong, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Reg Oceanog & Numer Modeling, Qingdao 266237, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Li, Dawei,Wei, Zexun,Wang, Yonggang,et al. Characteristics and temporal variations of near-bottom currents near the Dongsha Island in the northern South China Sea[J]. ACTA OCEANOLOGICA SINICA,2019,38(4):80-89.
APA	Li, Dawei.,Wei, Zexun.,Wang, Yonggang.,Li, Shujiang.,Xu, Tengfei.,...&Teng, Fei.(2019).Characteristics and temporal variations of near-bottom currents near the Dongsha Island in the northern South China Sea.ACTA OCEANOLOGICA SINICA,38(4),80-89.
MLA	Li, Dawei,et al."Characteristics and temporal variations of near-bottom currents near the Dongsha Island in the northern South China Sea".ACTA OCEANOLOGICA SINICA 38.4(2019):80-89.