Observed near-inertial kinetic energy in the northwestern South China Sea

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	Observed near-inertial kinetic energy in the northwestern South China Sea
	[Chen, Gengxin ; Xue, Huijie ; Wang, Dongxiao ; Xie, Qiang] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China ; [Xue, Huijie] Univ Maine, Sch Marine Sci, Orono, ME USA ; [Xie, Qiang] Chinese Acad Sci, Sanya Inst Deep Sea Sci Engn, Sanya, Peoples R China
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
	2013
卷号	118 期号:10 页码:4965-4977
关键词	inertial kinetic energy South China Sea storm eddy
ISSN号	2169-9275
通讯作者	hxue@maine.edu
中文摘要	Based on more than 3 years of moored current-meter records, this study examined seasonal variability of near-inertial kinetic energy (NIKE) as well as all large (greater than one standard deviation from the mean) NIKE events related to storms and eddies in the northwestern South China Sea. The NIKE in the subsurface layer (30-450 m) exhibited obvious seasonal variability with larger values in autumn (herein defined as August, September, and October). All large NIKE events during the observation period were generated by passing storms. Most of the NIKE events had an e-folding timescale longer than 7 d. The phase velocity, vertical wavelength, and frequency shift of these events were examined. The maximum NIKE, induced by typhoon Neoguri, was observed in April 2008. Normal mode analysis suggested that the combined effects of the first four modes determined the vertical distribution of NIKE with higher NIKE below 70 m but lower NIKE from 30 to 70 m. Another near-inertial oscillation event observed in August 2007 had the longest e-folding timescale of 13.5 d. Moreover, the NIKE propagated both upward and downward during this event. A ray-tracing model indicated that the smaller Brunt-Vaisala frequency and the stronger vertical shear of horizontal currents in an anticyclonic eddy and the near-inertial wave with larger horizontal scale facilitated the unusual propagation of the NIKE and the long decay timescale. Although the NIKE originated from wind, the water column structure affected by diverse oceanographic processes contributed substantially to its complex propagation and distribution.
学科主题	Oceanography
资助信息	Insightful comments from Willi Rath and another anonymous reviewer are very helpful in improving the work. This work is supported by National Basic Research Program of China (grant 2011CB403504 and 2011CB403503), the Guangzhou City Project for the Pearl River New Star in Science and Technology (grant 2013J2200087), and National Natural Science Foundation of China (grant 41106027 and 41206008).
原文出处	AMER GEOPHYSICAL UNION
语种	英语
WOS记录号	WOS:000327380100015
公开日期	2015-01-14
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/10877]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
推荐引用方式 GB/T 7714	[Chen, Gengxin,Xue, Huijie,Wang, Dongxiao,et al. Observed near-inertial kinetic energy in the northwestern South China Sea[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2013,118(10):4965-4977.
APA	[Chen, Gengxin,Xue, Huijie,Wang, Dongxiao,Xie, Qiang] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China,[Xue, Huijie] Univ Maine, Sch Marine Sci, Orono, ME USA,&[Xie, Qiang] Chinese Acad Sci, Sanya Inst Deep Sea Sci Engn, Sanya, Peoples R China.(2013).Observed near-inertial kinetic energy in the northwestern South China Sea.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,118(10),4965-4977.
MLA	[Chen, Gengxin,et al."Observed near-inertial kinetic energy in the northwestern South China Sea".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 118.10(2013):4965-4977.