IOCAS-IR  > 海洋环流与波动重点实验室
Spontaneous near-inertial wave generation from mesoscale eddy: Nonlinear forcing mechanism
Zhao, Bo1,2; Liu, Zhiliang1,2; Xu, Zhenhua3,4,5,6; Yin, Baoshu3,4,5,6; Zheng, Quanan7
2023-07-01
Source PublicationPHYSICS OF FLUIDS
ISSN1070-6631
Volume35Issue:7Pages:14
Corresponding AuthorLiu, Zhiliang(zhlliu3897@hevttc.edu.cn) ; Xu, Zhenhua(xuzhenhua@qdio.ac.cn)
AbstractThe spontaneous generation of near-inertial waves (NIWs) from quasi-geostrophic mesoscale eddies in a stratified fluid is investigated and the process and mechanism clarified by numerical modeling and a theoretical analysis. Mesoscale eddies, as slow balance flows, are inevitably accompanied by unbalanced near-inertial oscillations (NIOs) in their long period evolution. A mesoscale eddy supplies kinetic energy to NIOs through its interaction with perturbations, which exist universally in the world oceans. Afterward, NIWs are generated spontaneously via the nonlinear coupling of the eddy and NIOs. The baroclinicity of mesoscale eddies is an essential condition of this spontaneous NIW generation mechanism. The resonance of the NIWs and NIOs enables the internal wave continuum to be dominated by NIWs, which share the same horizontal wavenumbers with the eddy. After generation, the NIWs radiate energy toward the eddy center and remain stationary as a whole, relative to the propagating eddy. Generally, an anticyclonic mesoscale eddy can emit much stronger NIWs than does a cyclonic eddy. The NIW intensity strengthens exponentially with the Rossby number. The essence of this spontaneous NIW generation mechanism is the nonlinear interaction between slow balance flows and the accompanying fast motions. It represents an effective pathway for mesoscale eddy energy sinks and makes a non-negligible contribution to the global NIW energy. Published under an exclusive license by AIP Publishing.
DOI10.1063/5.0156176
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[92058202] ; National Natural Science Foundation of China[92258301] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB42000000] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA22050202] ; Shandong special funding for Qingdao Pilot National Laboratory for Marine Science and Technology[2022QNLM010302]
WOS Research AreaMechanics ; Physics
WOS SubjectMechanics ; Physics, Fluids & Plasmas
WOS IDWOS:001060308700009
PublisherAIP Publishing
WOS KeywordSOUTH CHINA SEA ; INTERNAL GRAVITY-WAVES ; KINETIC-ENERGY ; PART I ; VORTEX ; RADIATION ; DISSIPATION ; PROPAGATION ; CIRCULATION ; INSTABILITY
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/182084
Collection海洋环流与波动重点实验室
Corresponding AuthorLiu, Zhiliang; Xu, Zhenhua
Affiliation1.Hebei Normal Univ Sci & Technol, Marine Sci Res Ctr, Qinhuangdao 066004, Hebei, Peoples R China
2.Hebei Key Lab Ocean Dynam Resources & Environm, Qinhuangdao 066004, Hebei, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China
4.Pilot Natl Lab Marine Sci & Technol, Qingdao 266237, Peoples R China
5.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China
6.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
7.Univ Maryland, Dept Atmospher & Ocean Sci, College Pk, MD 27042 USA
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhao, Bo,Liu, Zhiliang,Xu, Zhenhua,et al. Spontaneous near-inertial wave generation from mesoscale eddy: Nonlinear forcing mechanism[J]. PHYSICS OF FLUIDS,2023,35(7):14.
APA Zhao, Bo,Liu, Zhiliang,Xu, Zhenhua,Yin, Baoshu,&Zheng, Quanan.(2023).Spontaneous near-inertial wave generation from mesoscale eddy: Nonlinear forcing mechanism.PHYSICS OF FLUIDS,35(7),14.
MLA Zhao, Bo,et al."Spontaneous near-inertial wave generation from mesoscale eddy: Nonlinear forcing mechanism".PHYSICS OF FLUIDS 35.7(2023):14.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhao, Bo]'s Articles
[Liu, Zhiliang]'s Articles
[Xu, Zhenhua]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhao, Bo]'s Articles
[Liu, Zhiliang]'s Articles
[Xu, Zhenhua]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhao, Bo]'s Articles
[Liu, Zhiliang]'s Articles
[Xu, Zhenhua]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.