| DOI: | 10.1007/s00382-012-1366-4
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| Scopus记录号: | 2-s2.0-84868696359
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| 论文题名: | Interdecadal North-Atlantic meridional overturning circulation variability in EC-EARTH |
| 作者: | Wouters B.; Drijfhout S.; Hazeleger W.
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| 刊名: | Climate Dynamics
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| ISSN: | 9307575
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| 出版年: | 2012
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| 卷: | 39, 期:11 | | 起始页码: | 2695
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| 结束页码: | 2712
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| 语种: | 英语
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| 英文关键词: | Coupled model
; Decadal variability North Atlantic Ocean
; Meridional overturning circulation
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| 英文摘要: | The Atlantic meridional overturning circulation (AMOC) in a 600 years pre-industrial run of the newly developed EC-EARTH model features marked interdecadal variability with a dominant time-scale of 50-60 years. An oscillation of approximately 2 Sverdrup (1 Sv = 106 m3 s-1) is identified, which manifests itself as a monopole causing the overturning to simultaneously strengthen (/weaken) and deepen (/shallow) as a whole. Eight years before the AMOC peaks, density in the Labrador-Irminger Sea region reaches a maximum, triggering deep water formation. This density change is caused by a counterclockwise advection of temperature and salinity anomalies at lower latitudes, which we relate to the north-south excursions of the subpolar-subtropical gyre boundary and variations in strength and position of the subpolar gyre and the North Atlantic Current. The AMOC fluctuations are not directly forced by the atmosphere, but occur in a delayed response of the ocean to forcing by the North Atlantic Oscillation, which initiates "intergyre"-gyre fluctuations. Associated with the AMOC is a 60-year sea surface temperature variability in the Atlantic, with a pattern and timescale showing similarities with the real-world Atlantic Multidecadal Variability. This good agreement with observations lends a certain degree of credibility that the mechanism that is described in this article could be seen as representative of the real climate system. © 2012 Springer-Verlag. |
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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/55292
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| Appears in Collections: | 过去全球变化的重建
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作者单位: | Wilhelminaln 10, 3732 GK De Bilt, Netherlands
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| Recommended Citation: | |
Wouters B.,Drijfhout S.,Hazeleger W.. Interdecadal North-Atlantic meridional overturning circulation variability in EC-EARTH[J]. Climate Dynamics,2012-01-01,39(11)
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