| DOI: | 10.1002/2015GL066238
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| 论文题名: | Southern Ocean isopycnal mixing and ventilation changes driven by winds |
| 作者: | Abernathey R.; Ferreira D.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8371
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| EISSN: | 1944-8102
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| 出版年: | 2015
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| 卷: | 42, 期:23 | | 起始页码: | 10357
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| 结束页码: | 10365
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| 语种: | 英语
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| 英文关键词: | isopycnal mixing
; mesoscale eddies
; Southern Ocean
; ventilation
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| Scopus关键词: | Carbon dioxide
; Kinetic energy
; Kinetics
; Mixing
; Ocean currents
; Ventilation
; Wind
; Antarctic Circumpolar Currents
; Eddy kinetic energy
; High resolution process
; Meridional overturning circulations
; Mesoscale eddy
; Mixing length theories
; Passive ventilation
; Southern ocean
; Oceanography
; circumpolar current
; isopycnal layer
; kinetic energy
; meridional circulation
; mesoscale eddy
; mixing
; overturn
; tracer
; ventilation
; wind forcing
; wind-driven circulation
; Southern Ocean
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| 英文摘要: | Observed and predicted changes in the strength of the westerly winds blowing over the Southern Ocean have motivated a number of studies on the response of the Antarctic Circumpolar Current and Southern Ocean meridional overturning circulation (MOC) to wind perturbations and led to the hypothesis of the "eddy compensation" regime, wherein the MOC becomes insensitive to wind changes. In addition to the MOC, tracer transport also depends on mixing processes. Here we show, in a high-resolution process model, that isopycnal mixing by mesoscale eddies is strongly dependent on the wind strength. This dependence can be explained by mixing length theory and is driven by increases in eddy kinetic energy; the mixing length does not change strongly in our simulation. Simulation of a passive ventilation tracer (analogous to CFCs or anthropogenic CO2) demonstrates that variations in tracer uptake across experiments are dominated by changes in isopycnal mixing, rather than changes in the MOC. We argue that to properly understand tracer uptake under different wind-forcing scenarios, the sensitivity of isopycnal mixing to winds must be accounted for. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84953638435&doi=10.1002%2f2015GL066238&partnerID=40&md5=d1c622f2c5e4cfc030a0fd2e3621f19f
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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/7987
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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: | Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States
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| Recommended Citation: | |
Abernathey R.,Ferreira D.. Southern Ocean isopycnal mixing and ventilation changes driven by winds[J]. Geophysical Research Letters,2015-01-01,42(23).
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