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An irregularly shaped warm eddy observed by Chinese underwater gliders
Qiu, Chunhua1,5; Mao HB(毛华斌)2; Wang, Yanhui3; Yu JC(俞建成)4; Su, Danyi1; Lian, Shumin2
Department海洋机器人卓越创新中心
Source PublicationJOURNAL OF OCEANOGRAPHY
ISSN0916-8370
2019
Volume75Issue:2Pages:139-148
Indexed BySCI
WOS IDWOS:000458908000002
Contribution Rank4
Funding OrganizationNational Key RD Plan of China ; National Natural Science Foundation of China ; Natural Science Foundation of Guangdong Province ; Distinguished Young Teachers of Fundamental Research Funds for the Central Universities
KeywordIrregular shape Warm eddy Chinese underwater glider Oceanic current Eddy-current interaction
AbstractMesoscale eddies are important for transporting oceanic energy and matter. We investigated the three-dimensional structure of an irregularly shaped warm eddy using three Chinese underwater gliders and satellite data during May 2015 in the northern South China Sea. The warm eddy lasted for 2 months, remained quasi-steady, and had a mean radius of similar to 70 km from May 10 to May 31. The heat contents observed along the two glider tracks differed markedly, by 2 x 10(9) J/m(2), which reflected an imbalance in the geostrophic and tangential velocity distributions of the eddy. The geostrophic/tangential velocity decreased/increased with depth within the warm eddy. The maximum tangential velocities calculated using the datasets from the two gliders were 0.8 and 0.25 m/s, respectively, confirming that the shape of the warm eddy was horizontally asymmetrical. Large errors can arise when the heat, energy, and matter transport for an irregularly shaped eddy are estimated using a regular circular model. We suggest that more intersecting glider tracks should be used to retrieve the three-dimensional eddy structure, and that those tracks should be better designed. The irregular shape of the warm eddy was likely induced by oceanic currents such as the wind-induced Ekman current. Further study is needed to elucidate the eddy-current interactions and the mechanisms thereof.
Language英语
WOS SubjectOceanography
WOS KeywordANTICYCLONIC EDDY ; ROSSBY WAVES ; SOUTH ; KUROSHIO ; SEA ; VORTICES ; EDDIES
WOS Research AreaOceanography
Funding ProjectNational Key RD Plan of China[2017YFC0305804] ; National Key RD Plan of China[2017YFC0305904] ; National Natural Science Foundation of China[41776027] ; Natural Science Foundation of Guangdong Province[2015A030313151] ; Distinguished Young Teachers of Fundamental Research Funds for the Central Universities[17lgzd11]
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Document Type期刊论文
Identifierhttp://ir.sia.cn/handle/173321/24245
Collection海洋机器人卓越创新中心
Corresponding AuthorMao HB(毛华斌)
Affiliation1.The Center for Coastal Ocean Science and Technology, School of Marine Sciences, Sun Yat-sen University, Guangzhou 510275, China
2.State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
3.School of Mechanical Engineering, Tianjin University, Tianjin 300072, China
4.State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China
5.Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, School of Marine Sciences, Sun Yat-sen University, Guangzhou 510275, China
Recommended Citation
GB/T 7714
Qiu, Chunhua,Mao HB,Wang, Yanhui,et al. An irregularly shaped warm eddy observed by Chinese underwater gliders[J]. JOURNAL OF OCEANOGRAPHY,2019,75(2):139-148.
APA Qiu, Chunhua,Mao HB,Wang, Yanhui,Yu JC,Su, Danyi,&Lian, Shumin.(2019).An irregularly shaped warm eddy observed by Chinese underwater gliders.JOURNAL OF OCEANOGRAPHY,75(2),139-148.
MLA Qiu, Chunhua,et al."An irregularly shaped warm eddy observed by Chinese underwater gliders".JOURNAL OF OCEANOGRAPHY 75.2(2019):139-148.
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