DOI: 10.1002/2013GL058617
论文题名: Deep boundary current disintegration in Drake Passage
作者: Brearley J.A. ; Sheen K.L. ; Naveira Garabato A.C. ; Smeed D.A. ; Speer K.G. ; Thurnherr A.M. ; Meredith M.P. ; Waterman S.
刊名: Geophysical Research Letters
ISSN: 0094-10516
EISSN: 1944-10247
出版年: 2014
卷: 41, 期: 1 起始页码: 121
结束页码: 127
语种: 英语
英文关键词: boundary currents
; eddies
; overturning
; Southern Ocean
Scopus关键词: Antarctic Circumpolar Currents
; Anticyclonic eddies
; Boundary currents
; Continental slope
; eddies
; overturning
; Overturning circulation
; Southern ocean
; Earth sciences
; Geophysics
; Ocean currents
; anticyclone
; boundary current
; eddy
; overturn
; Rossby number
; salinity
; topography
; Drake Passage
; Pacific Ocean
; Pacific Ocean (Southeast)
; South America
英文摘要: The fate of a deep boundary current that originates in the Southeast Pacific and flows southward along the continental slope of South America is elucidated. The current transports poorly ventilated water of low salinity (a type of Pacific Deep Water, PDW), into Drake Passage. East of Drake Passage, the boundary current breaks into fresh anticyclonic eddies, nine examples of which were observed in mooring data from December 2009 to March 2012. The observed eddies appear to originate mainly from a topographic separation point close to 60°W, have typical diameters of 20-60 km and accompanying Rossby numbers of 0.1-0.3. These features are likely to be responsible for transporting PDW meridionally across the Antarctic Circumpolar Current, explaining the near homogenization of Circumpolar Deep Water properties downstream of Drake Passage. This mechanism of boundary current breakdown may constitute an important process in the Southern Ocean overturning circulation. Key Points Mid-depth eddies observed east of Drake Passage Eddies contain fresh Pacific Deep Water Eddies induce transport of water properties across the ACC ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896740298&doi=10.1002%2f2013GL058617&partnerID=40&md5=2c1b489996a1a1bb53ec2fb9b8259c57
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7780
Appears in Collections: 气候减缓与适应
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作者单位: National Oceanography Centre, University of Southampton, Southampton, United Kingdom
Recommended Citation:
Brearley J.A.,Sheen K.L.,Naveira Garabato A.C.,et al. Deep boundary current disintegration in Drake Passage[J]. Geophysical Research Letters,2014-01-01,41(1).