| DOI: | 10.1002/grl.50243
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| 论文题名: | Anthropogenic impact on Agulhas leakage |
| 作者: | Biastoch A.; Böning C.W.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9229
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| EISSN: | 1944-8960
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| 出版年: | 2013
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| 卷: | 40, 期:6 | | 起始页码: | 1138
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| 结束页码: | 1143
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| 语种: | 英语
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| 英文关键词: | Agulhas leakage
; Atlantic Meridional Overturning
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| Scopus关键词: | Anthropogenic impacts
; Atlantic Meridional Overturning
; Atlantic meridional overturning circulations
; Dynamic adjustment
; High-resolution ocean model
; Ocean circulation
; Potential effects
; Southern Hemisphere
; Global warming
; Wind stress
; Oceanography
; air-sea interaction
; anthropogenic effect
; climate modeling
; gyre
; leakage
; meridional circulation
; oceanic circulation
; Southern Hemisphere
; thermocline
; twenty first century
; Atlantic Ocean
; Atlantic Ocean (South)
; Indian Ocean
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| 英文摘要: | Recent work suggests that changes of the Southern Hemisphere (SH) winds led to an increase in Agulhas leakage and a corresponding salinification of the Atlantic. Climate model projections for the 21st century predict a progressive southward migration and intensification of the SH westerlies. The potential effects on the ocean circulation of such an anthropogenic trend in wind stress are studied here with a high-resolution ocean model forced by a step-function change in SH wind stress that involves a 7% increase in westerlies strength and a 2° shift in the zero wind stress curl. The model simulation suggests a rapid dynamic adjustment of Agulhas leakage by 4.5 Sv, about a third of its original value, after a few years. The change in leakage is reflected in a concomitant change in the transport of the South Atlantic subtropical gyre, but leads only to a small increase in the Atlantic Meridional Overturning Circulation (AMOC) of O(1 Sv) after three decades. A main effect of the increasing inflow of Indian Ocean waters with potential long-term ramifications for the AMOC is the salinification and densification of upper-thermocline waters in the South Atlantic, which extends into the North Atlantic within the first three decades. Key Points Agulhas leakage increases under global warming The increase in Agulhas leakage increases the supergyre The increase in Agulhas leakage transports additional salt into the Atlantic. ©2013 American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876888844&doi=10.1002%2fgrl.50243&partnerID=40&md5=94383ebd7d4b5ddcecceb4ae7baf48e3
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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/6493
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| Appears in Collections: | 气候减缓与适应
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作者单位: | GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Düsternbrooker Weg 20, 24105 Kiel, Germany
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| Recommended Citation: | |
Biastoch A.,Böning C.W.. Anthropogenic impact on Agulhas leakage[J]. Geophysical Research Letters,2013-01-01,40(6).
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