Can Tidal Forcing Alone Generate a GM-Like Internal Wave Spectrum?

doi:10.1029/2019GL086338

GSTDTAP

DOI	10.1029/2019GL086338
	Can Tidal Forcing Alone Generate a GM-Like Internal Wave Spectrum?
	Chen, Zhiwu 1,2; Chen, Shaomin 1,3; Liu, Zhiyu 4,5; Xu, Jiexin 1,2; Xie, Jieshuo 1,2; He, Yinghui 1,2; Cai, Shuqun 1,2,6
	2019-12-30
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
EISSN	1944-8007
出版年	2019
文章类型	Article;Early Access
语种	英语
国家	Peoples R China
英文摘要	An idealized two-dimensional numerical model is utilized to study internal wave generation by tide-topography interaction and wind forcing. Previous studies suggest that the quasi-universal Garrett-Munk (GM) internal wave spectrum can be generated and maintained only when energy is supplied from both the wind and the tides, while the present study shows that M-2 tidal forcing alone is sufficient to generate a GM-like spectrum in a latitude band roughly between 17 degrees and 29 degrees, with the steepness parameter epsilon > 1, N(0)h(0)/u(0) > 1 (N-0 is buoyancy frequency, h(0) topographic height, and u(0) tidal amplitude), and a finite excursion parameter. The key lies in the generation of near-inertial waves (NIWs) by breaking internal tides and triadic resonant interactions around supercritical topography. Remarkably, in the northern South China Sea, tidal forcing can contribute a comparable amount of near-inertial energy as that contributed by the summer wind and thus is an important NIW generation mechanism.
英文关键词	internal waves near-inertial waves GM spectrum parametric subharmonic instability internal wave breaking northern South China Sea
领域	气候变化
收录类别	SCI-E
WOS记录号	WOS:000504765100001
WOS关键词	OCEAN ; MODEL ; DISSIPATION ; INSTABILITY ; TOPOGRAPHY ; ENERGY ; BEAMS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/225268
专题	环境与发展全球科技态势
作者单位	1.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China; 2.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou, Guangdong, Peoples R China; 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China; 4.Xiamen Univ, Coll Ocean & Earth Sci, State Key Lab Marine Environm Sci, Xiamen, Fujian, Peoples R China; 5.Xiamen Univ, Coll Ocean & Earth Sci, Dept Phys Oceanog, Xiamen, Fujian, Peoples R China; 6.Chinese Acad Sci, Inst South China Sea Ecol & Environm Engn, Guangzhou, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Chen, Zhiwu,Chen, Shaomin,Liu, Zhiyu,et al. Can Tidal Forcing Alone Generate a GM-Like Internal Wave Spectrum?[J]. GEOPHYSICAL RESEARCH LETTERS,2019.
APA	Chen, Zhiwu.,Chen, Shaomin.,Liu, Zhiyu.,Xu, Jiexin.,Xie, Jieshuo.,...&Cai, Shuqun.(2019).Can Tidal Forcing Alone Generate a GM-Like Internal Wave Spectrum?.GEOPHYSICAL RESEARCH LETTERS.
MLA	Chen, Zhiwu,et al."Can Tidal Forcing Alone Generate a GM-Like Internal Wave Spectrum?".GEOPHYSICAL RESEARCH LETTERS (2019).