Observed Near-Inertial Waves in the Northern South China Sea

doi:10.3390/rs13163223

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	Observed Near-Inertial Waves in the Northern South China Sea
	Yang, Bing 1,2,3,4; Hu, Po 1,2,3,4; Hou, Yijun 1,2,3,4
刊名	REMOTE SENSING
	2021-08-01
卷号	13 期号:16 页码:18
关键词	near-inertial waves near-inertial oscillations remote sensing mesoscale eddy South China Sea
DOI	10.3390/rs13163223
通讯作者	Hu, Po(hupo@qdio.ac.cn)
英文摘要	Characteristics of near-inertial waves (NIWs) induced by the tropical storm Noul in the South China Sea are analyzed based on in situ observations, remote sensing, and analysis data. Remote sensing sea level anomaly data suggests that the NIWs were influenced by a southwestward moving anticyclonic eddy. The NIWs had comparable spectral density with internal tides, with a horizontal velocity of 0.14-0.21 m/s. The near-inertial kinetic energy had a maximum value of 7.5 J/m(3) and propagated downward with vertical group speed of 10 m/day. Downward propagation of near-inertial energy concentrated in smaller wavenumber bands overwhelmed upward propagation energy. The e-folding time of NIWs ranged from 4 to 11 days, and the larger e-folding time resulted from the mesoscale eddies with negative vorticity. Modified by background relative vorticity, the observed NIWs had both red-shifted and blue-shifted frequencies. The upward propagating NIWs had larger vertical phase speeds and wavelengths than downward propagating NIWs. There was energy transfer from the mesoscale field to NIWs with a maximum value of 8.5 x 10(-9) m(2) s(-3) when total shear and relative vorticity of geostrophic currents were commensurate. Our results suggest that mesoscale eddies are a significant factor influencing the generation and propagation of NIWs in the South China Sea.
资助项目	Natural Key Research and Development Program of China[2016YFC1400104] ; National Natural Science Foundation of China[41706017]
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
语种	英语
出版者	MDPI
WOS记录号	WOS:000690163500001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/176251]
专题	海洋研究所_海洋环流与波动重点实验室
通讯作者	Hu, Po
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Ocean & Climate Dynam, Qingdao 266237, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Yang, Bing,Hu, Po,Hou, Yijun. Observed Near-Inertial Waves in the Northern South China Sea[J]. REMOTE SENSING,2021,13(16):18.
APA	Yang, Bing,Hu, Po,&Hou, Yijun.(2021).Observed Near-Inertial Waves in the Northern South China Sea.REMOTE SENSING,13(16),18.
MLA	Yang, Bing,et al."Observed Near-Inertial Waves in the Northern South China Sea".REMOTE SENSING 13.16(2021):18.