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Mesoscale eddy characteristics in the interior subtropical southeast Indian Ocean, tracked from the Leeuwin Current system
Mao, Huabin3; Feng, Ming; Phillips, Helen E.; Lian, Shumin3
2019
Source PublicationDEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
ISSN0967-0645
Volume161Pages:52
AbstractTwo oppositely rotating mesoscale eddies, originating from the Leeuwin Current, were captured during a research cruise in the interior southeast Indian Ocean in August 2012, a few hundred kilometers off the west coast of Australia. The two eddies had different vertical structures: the anticyclonic eddy had stronger vertical shear above 200 m and a less stratified thermocline below the mixed layer, while the cyclonic eddy had a more barotropic structure in the upper 500 m. Compared with the same types of eddies sampled in 2003 close to the Australian coast, the 2012 anticyclonic eddy had a larger radius, deeper isothermal depths, and higher peak velocity; whereas the 2012 cyclonic eddy had a similar structure with the 2003 survey. We use an Argo float and three surface drifters deployed and trapped in the anticyclonic eddy to track its evolution over a 4-month period. The eddy was observed to propagate 1000 km further to the west, indicating that the Leeuwin Current properties of the eddy may be preserved for over 2000 km off the west coast of Australia. The eddy appeared to have experienced radial excursions relative to the eddy center, with periodicity of 4-6 days and 15 days, during their anticlockwise motions. The radial movements of the drifters appeared to be constrained by the radial momentum balance within the eddy. The importance of eddy distortions to ocean primary production in anticyclonic eddies in the southeast Indian Ocean warrants further studies.
DepartmentLTO
KeywordSouth Indian Ocean Leeuwin current Mesoscale eddies Eddy tracking
DOI10.1016/j.dsr2.2018.07.003
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17752
Collection热带海洋环境国家重点实验室(LTO)
Affiliation1.CSIRO Oceans & Atmosphere, Crawley, WA, Australia
2.Phillips, Helen E.] Univ Tasmania, IMAS, Hobart, Tas 7001, Australia
3.Phillips, Helen E.] ARC Ctr Excellence Climate Extremes, Hobart, Tas 7001, Australia
4.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Mao, Huabin,Feng, Ming,Phillips, Helen E.,et al. Mesoscale eddy characteristics in the interior subtropical southeast Indian Ocean, tracked from the Leeuwin Current system[J]. DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY,2019,161:52, 62.
APA Mao, Huabin,Feng, Ming,Phillips, Helen E.,&Lian, Shumin.(2019).Mesoscale eddy characteristics in the interior subtropical southeast Indian Ocean, tracked from the Leeuwin Current system.DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY,161,52.
MLA Mao, Huabin,et al."Mesoscale eddy characteristics in the interior subtropical southeast Indian Ocean, tracked from the Leeuwin Current system".DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY 161(2019):52.
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