The near-inertial waves observed east of the Philippines

IOCAS-IR

	The near-inertial waves observed east of the Philippines
	Shengming YUAN ; Xiaomei YAN ; Linlin ZHANG ; Bing YANG; Chongguang PANG ; Dunxin HU
发表期刊	Journal of Oceanology and Limnology
ISSN	2096-5508
	2022-09-15
出版年	2022
卷号	v.40 期号:05 页码:199-218
文献类型	CNKI期刊论文
摘要	Based on mooring observations from Aug.1,2016 to Dec.14,2017,the characteristics and underlying mechanisms of near-inertial waves(NIWs) observed east of the Philippines were studied.Three strong NIW events were investigated in detail.The NIWs in Event Ⅰ were induced by typhoon Lan and had the strongest magnitudes of 0.35 m/s.The maximum near-inertial kinetic energy(NIKE) was shown at the ocean surface.The NIW in Event Ⅱ was stimulated by a moderate cyclonic wind with the extreme NIKE located at about 110-m depth.The existence of a cyclonic eddy during Events Ⅰ and Ⅱ led to a blue shift of near-inertial frequencies.For Event Ⅲ,the surface near-inertial signals were also induced by local weak wind,whereas the real generation mechanisms for the subsurface NIWs remain unclear.In particular,during Event Ⅲ,there was a nonlinear wave-wave interaction between NIWs and semidiurnal(D_2) tides,which further induced strong D_2±f waves.Overall,the NIWs in the three events exhibited distinct vertical structures.The NIWs in Events Ⅰ and Ⅱ were dominated by lower mode s with elevated NIKE well confined to the upper 250 m and 270 m,respectively.In contrast,the NIW Event Ⅲ was dominated by higher modes and the NIWs penetrated downward beyond 360 m.Such deep penetration of NIWs could be attributed to the weak wind stress curl and positive sea level anomalies associated with an anticyclonic eddy.In addition,the three NIW events had e-folding timescales of less than 7 days.
关键词	near-inertial wave(NIW) generation mechanism dynamic characteristic
CNKI专辑号	A;
CNKI专辑名称	基础科学;
CNKI专题号	A010;
CNKI专题名称	海洋学;
分类号	P731.2
收录类别	中科院核心 ; 中科院扩展
语种	英文;
资助项目(基金）	Supported by the National Key Research and Development Program of China (No. 2020YFA0608801) ; the Scientific Instrument Developing Project of the Chinese Academy of Sciences (No. YJKYYQ20190047) ; the National Key Research and Development Program of China (Nos. 2016YFC0301203, 2017YFA0603202) ; the National Natural Science Foundation of China (No. 42122041) The TS Scholar Program ; Mooring and CTD data were collected onboard of R/V Kexue implementing the open research cruise NORC2021-09 supported by the NSFC Shiptime Sharing Project (No. 42049909)
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/187334
专题	中国科学院海洋研究所
作者单位	1.KeyLaboratoryofOceanCirculationandWaves,InstituteofOceanology,ChineseAcademyofSciences 2.CollegeofEarthScience,UniversityofChineseAcademyofSciences 3.PilotNationalLaboratoryforMarineScienceandTechnology(Qingdao) 4.CenterforOceanMega-Science,ChineseAcademyofSciences
推荐引用方式 GB/T 7714	Shengming YUAN,Xiaomei YAN,Linlin ZHANG,et al. The near-inertial waves observed east of the Philippines. 2022.