| DOI: | 10.1002/2014GL059278
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| 论文题名: | Quantitative estimate of the paleo-Agulhas leakage |
| 作者: | Caley T.; Peeters F.J.C.; Biastoch A.; Rossignol L.; Van Sebille E.; Durgadoo J.; Malaizé B.; Giraudeau J.; Arthur K.; Zahn R.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-10345
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| EISSN: | 1944-10076
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| 出版年: | 2014
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| 卷: | 41, 期:4 | | 起始页码: | 1238
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| 结束页码: | 1246
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| 语种: | 英语
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| 英文关键词: | numerical ocean model
; overturning circulation
; planktic foraminiferal
; quantitative palaeo Agulhas leakage
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| Scopus关键词: | Submarine geology
; Foraminiferal assemblages
; Glacial-interglacial cycles
; Global ocean circulation
; Numerical ocean modeling
; Overturning circulation
; planktic foraminiferal
; Quantitative estimates
; Quantitative estimation
; Mooring
; climate change
; glacial-interglacial cycle
; instrumentation
; leakage
; marine sediment
; paleoenvironment
; planktonic foraminifera
; quantitative analysis
; Atlantic Ocean
; Indian Ocean
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| 英文摘要: | The Indian-Atlantic water exchange south of Africa (Agulhas leakage) is a key component of the global ocean circulation. No quantitative estimation of the paleo-Agulhas leakage exists. We quantify the variability in interocean exchange over the past 640,000 years, using planktic foraminiferal assemblage data from two marine sediment records to define an Agulhas leakage efficiency index. We confirm the validity of our new approach with a numerical ocean model that realistically simulates the modern Agulhas leakage changes. Our results suggest that, during the past several glacial-interglacial cycles, the Agulhas leakage varied by ~10 sverdrup and more during major climatic transitions. This lends strong credence to the hypothesis that modifications in the leakage played a key role in changing the overturning circulation to full strength mode. Our results are instrumental for validating and quantifying the contribution of the Indian-Atlantic water leakage to the global climate changes. Key Points A quantitative index for the Agulhas leakage has been developed Paleo-Agulhas leakage over the past 640,000 years has been quantified We provide reference points for further analyses and interpretations ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84894288452&doi=10.1002%2f2014GL059278&partnerID=40&md5=1d8659374123c8cbf764c417a737f9c1
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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/7609
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Faculty of Earth and Life Sciences, Department of Earth Sciences, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
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| Recommended Citation: | |
Caley T.,Peeters F.J.C.,Biastoch A.,et al. Quantitative estimate of the paleo-Agulhas leakage[J]. Geophysical Research Letters,2014-01-01,41(4).
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