| DOI: | 10.1002/2015GL065625
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| 论文题名: | Tracing the Agulhas leakage with lead isotopes |
| 作者: | Paul M.; Van De Flierdt T.; Rehkämper M.; Khondoker R.; Weiss D.; Lohan M.C.; Homoky W.B.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9340
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| EISSN: | 1944-9071
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| 出版年: | 2015
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| 卷: | 42, 期:20 | | 起始页码: | 8515
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| 结束页码: | 8521
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| 语种: | 英语
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| 英文关键词: | Agulhas
; GEOTRACES
; lead
; Pb isotopes
; seawater
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| Scopus关键词: | Biogeochemistry
; Ecology
; Isotopes
; Oceanography
; Seawater
; Surface waters
; Trace elements
; Agulhas
; Biogeochemical cycle
; GEOTRACES
; Isotopic composition
; Meridional overturning circulations
; Pb concentration
; Pb isotopes
; Surface seawater
; Lead
; concentration (composition)
; lead isotope
; leakage
; meridional circulation
; overturn
; saline intrusion
; seawater
; surface water
; warm water
; Agulhas Current
; Atlantic Ocean
; Atlantic Ocean (South)
; Cape Basin
; Indian Ocean
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| 英文摘要: | The transport of warm and salty waters from the Indian Ocean to the South Atlantic by the Agulhas Current constitutes a key return route of the meridional overturning circulation. Despite the importance of the Agulhas Leakage on interoceanic exchange, its role on biogeochemical cycles is poorly documented. Here we present the first lead (Pb) concentration and isotope data for surface seawater collected during the GEOTRACES cruise D357 in the Agulhas current system. Lead in surface waters of the Cape Basin is described by three distinct end-members: the South African coast, open South Atlantic seawater, and Indian Ocean seawater. The latter stands out in its Pb isotopic composition and can be tracked within two distinct Agulhas rings. High Pb concentrations in the Agulhas rings further corroborate an Indian Ocean provenance of waters and suggest that the Agulhas Leakage represents a major conduit not only for heat but also for trace metals. Key Points Lead isotopes for Cape Basin surface waters record mixing between three distinct end-members Pb isotopes are able to track leakage of Indian Ocean seawater into the Atlantic via Agulhas rings The Agulhas Leakage is not only a key pathway for heat but also impacts biogeochemical cycles © 2015. The Authors. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946593740&doi=10.1002%2f2015GL065625&partnerID=40&md5=8ac574059f435cd6fcada3b0aec2d902
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8955
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Department of Earth Science and Engineering, Imperial College London, London, United Kingdom
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| Recommended Citation: | |
Paul M.,Van De Flierdt T.,Rehkämper M.,et al. Tracing the Agulhas leakage with lead isotopes[J]. Geophysical Research Letters,2015-01-01,42(20).
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