Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL081382 |
Observing the Local Emergence of the Southern Ocean Residual-Mean Circulation | |
Sevellec, F.1,2; Garabato, A. C. Naveira2; Vic, C.2; Ducousso, N.1 | |
2019-04-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:7页码:3862-3870 |
文章类型 | Article |
语种 | 英语 |
国家 | France; England |
英文摘要 | The role of mesoscale turbulence in maintaining the mean buoyancy structure and overturning circulation of the Southern Ocean is investigated through a 2-year-long, single-mooring record of measurements in Drake Passage. The buoyancy budget of the area is successively assessed within the Eulerian and the Temporal-Residual-Mean frameworks. We find that a regime change occurs on time scales of 1 to 100 days, characteristic of mesoscale dynamics, whereby the eddy-induced turbulent horizontal advection balances the vertical buoyancy advection by the mean flow. We use these diagnostics to reconstruct the region's overturning circulation, which is found to entail an equatorward downwelling of Antarctic Intermediate and Bottom Waters and a poleward upwelling of Circumpolar Deep Water. The estimated eddy-induced flow can be accurately parameterized via the Gent-McWilliams closure by adopting a diffusivity of similar to 2,000 m(2) s(-1) with a middepth increase to 2,500 m(2) s(-1) at 2,100 m, immediately underneath the maximum interior stratification. |
英文关键词 | Southern Ocean meridional overturning mesoscale turbulence residual-mean circulation Eulerian circulation mooring measurements |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000465836200031 |
WOS关键词 | ANTARCTIC CIRCUMPOLAR CURRENT ; VELOCITY |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/182379 |
专题 | 气候变化 |
作者单位 | 1.Univ Brest IRD Ifremer, CNRS, Lab Oceanog Phys & Spatiale, Brest, France; 2.Univ Southampton, Ocean & Earth Sci, Southampton, Hants, England |
推荐引用方式 GB/T 7714 | Sevellec, F.,Garabato, A. C. Naveira,Vic, C.,et al. Observing the Local Emergence of the Southern Ocean Residual-Mean Circulation[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(7):3862-3870. |
APA | Sevellec, F.,Garabato, A. C. Naveira,Vic, C.,&Ducousso, N..(2019).Observing the Local Emergence of the Southern Ocean Residual-Mean Circulation.GEOPHYSICAL RESEARCH LETTERS,46(7),3862-3870. |
MLA | Sevellec, F.,et al."Observing the Local Emergence of the Southern Ocean Residual-Mean Circulation".GEOPHYSICAL RESEARCH LETTERS 46.7(2019):3862-3870. |
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