DOI: 10.1175/JCLI-D-17-0761.1
Scopus记录号: 2-s2.0-85048153446
论文题名: Southern Ocean Heat Uptake, redistribution, and storage in a warming climate: The role of meridional overturning circulation
作者: Liu W. ; Lu J. ; Xie S.-P. ; Fedorov A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 12 起始页码: 4727
结束页码: 4743
语种: 英语
英文关键词: Atmosphere-ocean interaction
; Climate models
; Coupled models
; Ocean circulation
; Ocean dynamics
Scopus关键词: Atmospheric thermodynamics
; Carbon dioxide
; Heat flux
; Heat storage
; Heat transfer
; Oceanography
; Atmosphere-ocean interactions
; Coupled models
; Eddy heat transport
; Meridional heat transports
; Meridional overturning circulations
; Ocean circulation
; Ocean dynamics
; Ocean heat transport
; Climate models
; air-sea interaction
; carbon dioxide
; climate modeling
; heat flux
; heat transfer
; meridional circulation
; overturn
; surface wind
; zonal wind
; Southern Ocean
英文摘要: Climate models show that most of the anthropogenic heat resulting from increased atmospheric CO2 enters the Southern Ocean near 60°S and is stored around 45°S. This heat is transported to the ocean interior by the meridional overturning circulation (MOC) with wind changes playing an important role in the process. To isolate and quantify the latter effect, we apply an overriding technique to a climate model and decompose the total ocean response to CO2 increase into two major components: one due to wind changes and the other due to direct CO2 effect. We find that the poleward-intensified zonal surface winds tend to shift and strengthen the ocean Deacon cell and hence the residual MOC, leading to anomalous divergence of ocean meridional heat transport around 60°S coupled to a surface heat flux increase. In contrast, at 45°S we see anomalous convergence of ocean heat transport and heat loss at the surface. As a result, the wind-induced ocean heat storage (OHS) peaks at 46°S at a rate of 0.07 ZJ yr-1 (° lat)-1 (1 ZJ = 1021 J), contributing 20% to the total OHS maximum. The direct CO2 effect, on the other hand, very slightly alters the residual MOC but primarily warms the ocean. It induces a small but nonnegligible change in eddy heat transport and causes OHS to peak at 42°S at a rate of 0.30 ZJ yr-1 (° lat)-1, accounting for 80% of the OHS maximum. We also find that the eddy-induced MOC weakens, primarily caused by a buoyancy flux change as a result of the direct CO2 effect, and does not compensate the intensified Deacon cell. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111521
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth Sciences, University of California, Riverside, Riverside, San Diego, La Jolla, CA, United States; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; Department of Geology and Geophysics, Yale University, New Haven, CT, United States; Pacific Northwest National Laboratory, Richland, WA, United States
Recommended Citation:
Liu W.,Lu J.,Xie S.-P.,et al. Southern Ocean Heat Uptake, redistribution, and storage in a warming climate: The role of meridional overturning circulation[J]. Journal of Climate,2018-01-01,31(12)