The characteristics of spontaneous near-inertial wave generation from an anticyclonic mesoscale eddy

IOCAS-IR

	The characteristics of spontaneous near-inertial wave generation from an anticyclonic mesoscale eddy
	Bo ZHAO; Zhenhua XU ; Qun LI ; Wenjia MIN ; Yang WANG; Baoshu YIN
发表期刊	Journal of Oceanology and Limnology
ISSN	2096-5508
	2022-03-15
出版年	2022
卷号	v.40 期号:02 页码:29-43
文献类型	CNKI期刊论文
摘要	The generation and propagation characteristics of near-inertial waves(NIWs) generated spontaneously from a quasi-geostrophic anticyclonic mesoscale eddy in a rotating and stratified fluid were investigated by three-dimensional numerical modeling. NIWs are generated over a long time interval as a forced response to balanced baroclinic mesoscale eddies. For such eddies, NIW generation from balanced flow is an inevitable result as the evolution of eddies. Moreover, the baroclinicity of mesoscale eddies is an essential condition for this NIW generation mechanism. The spontaneously generated NIWs radiate horizontally toward the eddy center and propagate upward in vertical direction. The forcing of the NIWs moves downward along the eddy axis from the location of maximum temperature anomaly of the mesoscale eddy. The moving speed of the forcing is independent on the balanced mesoscale eddies but is determined by the ratio of buoyancy to inertial frequency. When the forcing reaches the bottom of the mesoscale eddy, the spontaneous NIW generation process terminates. NIW intensity in this spontaneous generation process is strengthened with the increase of the Rossby and Froude numbers. Further research to gain a solid understanding of the role of the Rossby and Froude numbers is necessary for the parameterization of spontaneous NIW generation from quasi-geostrophic mesoscale eddies in general circulation model.
关键词	near-inertial waves(NIWs) anticyclonic mesoscale eddy spontaneous generation
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 Strategic Priority Research Program of Chinese Academy of Sciences (Nos. XDA22050202, XDB42000000) ; the National Natural Science Foundation of China (Nos. 92058202, 91858103) ; the National Key Research and Development Program of China (Nos. 2017YFA0604102, 2016YFC1401404) ; the CAS Key Research Program of Frontier Sciences (No. QYZDB-SSW-DQC024) ; the Key Deployment Project of Centre for Ocean Mega-Research of Science,Chinese Academy of Sciences (No. COMS2020Q07) ; jointly supported by the Chinese Academy of Sciences (CAS) and Commonwealth Scientific and Industrial Research Organisation (CSIRO)(No. 133244KYSB20190031)
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/187478
专题	中国科学院海洋研究所
作者单位	1.CASKeyLaboratoryofOceanCirculationandWaves,InstituteofOceanologyChineseAcademyofSciences 2.CenterforOceanMega-Science,ChineseAcademyofSciences 3.CollegeofEarthandPlanetarySciences,UniversityofChineseAcademyofSciences 4.PilotNationalLaboratoryforMarineScienceandTechnology(Qingdao) 5.CASEngineeringLaboratoryforMarineRanching,InstituteofOceanology,ChineseAcademyofSciences 6.PolarResearchInstituteofChina
推荐引用方式 GB/T 7714	Bo ZHAO,Zhenhua XU,Qun LI,et al. The characteristics of spontaneous near-inertial wave generation from an anticyclonic mesoscale eddy. 2022.