| DOI: | 10.1175/JCLI-D-13-00344.1
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| Scopus记录号: | 2-s2.0-84909594895
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| 论文题名: | A conceptual model of ocean heat uptake under climate change |
| 作者: | Marshall D.P.; Zanna L.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2014
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| 卷: | 27, 期:22 | | 起始页码: | 8444
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| 结束页码: | 8465
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| 语种: | 英语
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| Scopus关键词: | Atmospheric movements
; Carbon dioxide
; Climate models
; Experiments
; Mixing
; Oceanography
; Diapycnal mixing
; Heat budgets/fluxes
; Meridional overturning circulations
; Southern ocean
; Upwelling/downwelling
; Climate change
; carbon dioxide
; climate change
; Ekman transport
; heat budget
; heat flux
; meridional circulation
; North Atlantic Deep Water
; overturn
; vertical profile
; Southern Ocean
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| 英文摘要: | Aconceptual model of ocean heat uptake is developed as a multilayer generalization of Gnanadesikan. The roles of Southern Ocean Ekman and eddy transports, North Atlantic Deep Water (NADW) formation, and diapycnal mixing in controlling ocean stratification and transient heat uptake are investigated under climate change scenarios, including imposed surface warming, increased Southern Ocean wind forcing, with or without eddy compensation, and weakened meridional overturning circulation (MOC) induced by reduced NADW formation. With realistic profiles of diapycnal mixing, ocean heat uptake is dominated by Southern Ocean Ekman transport and its long-term adjustment controlled by the Southern Ocean eddy transport. The time scale of adjustment setting the rate of ocean heat uptake increases with depth. For scenarios with increased Southern Ocean wind forcing or weakened MOC, deepened stratification results in enhanced ocean heat uptake. In each of these experiments, the role of diapycnal mixing in setting ocean stratification and heat uptake is secondary. Conversely, in experiments with enhanced diapycnal mixing as employed in ''upwelling diffusion'' slab models, the contributions of diapycnal mixing and Southern Ocean Ekman transport to the net heat uptake are comparable, but the stratification extends unrealistically to the sea floor. The simple model is applied to interpret the output of an Earth system model, the Second Generation Canadian Earth System Model (CanESM2), in which the atmospheric CO2 concentration is increased by 1%yr-1 until quadrupling, where it is found that Southern Ocean Ekman transport is essential to reproduce the magnitude and vertical profile of ocean heat uptake. © 2014 American Meteorological Society. |
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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/51000
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Department of Physics, University of Oxford, Oxford, United Kingdom
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| Recommended Citation: | |
Marshall D.P.,Zanna L.. A conceptual model of ocean heat uptake under climate change[J]. Journal of Climate,2014-01-01,27(22)
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