Poleward propagation of parametric subharmonic instability-induced inertial waves

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)

	Poleward propagation of parametric subharmonic instability-induced inertial waves
	Xie, Xiaohui; Liu, Qian; Shang, Xiaodong; Chen, Guiying; Wang, Dongxiao
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
	2016
卷号	121 期号:3 页码:1881-1895
通讯作者	Xie, XH ; Shang, XD (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China.
中文摘要	This study presents two sets of current records obtained from the South China Sea and satellite altimeter data, and it suggests that near-inertial waves induced by parametric subharmonic instability (PSI) associated with internal tides can be transported poleward beyond their critical latitude phi(c) by background geostrophic flow (BGF). The two mooring locations were poleward of phi(c) (approximate to 14 degrees N) for diurnal subharmonics (0.5D(1); half diurnal frequency D-1); however, both of the current records revealed clear signals at 0.5D(1). The enhanced subinertial motion at 0.5D(1) exhibited a fortnightly spring-neap cycle but did not agree with that of D-1, indicating that it may not be generated via PSI associated with the local D-1. Observations from the altimeter data and a ray-tracing simulation suggested that these nonlocally generated 0.5D(1) waves may be excited near their phi(c), after which they propagated poleward under the role of the BGF to the observation site with a latitude higher than phi(c). The poleward propagation of near-inertial waves can produce elevated vertical shears; thus, it may play an important role in enhancing the local turbulent mixing.
学科主题	Oceanography
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/15555]
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	Xie, Xiaohui,Liu, Qian,Shang, Xiaodong,et al. Poleward propagation of parametric subharmonic instability-induced inertial waves[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2016,121(3):1881-1895.
APA	Xie, Xiaohui,Liu, Qian,Shang, Xiaodong,Chen, Guiying,&Wang, Dongxiao.(2016).Poleward propagation of parametric subharmonic instability-induced inertial waves.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,121(3),1881-1895.
MLA	Xie, Xiaohui,et al."Poleward propagation of parametric subharmonic instability-induced inertial waves".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 121.3(2016):1881-1895.