| DOI: | 10.1175/JCLI-D-14-00235.1
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| Scopus记录号: | 2-s2.0-84921657596
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| 论文题名: | Ocean heat uptake processes: A model intercomparison |
| 作者: | Exarchou E.; Kuhlbrodt T.; Gregory J.M.; Smith R.S.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2015
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| 卷: | 28, 期:2 | | 起始页码: | 887
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| 结束页码: | 908
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| 语种: | 英语
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| Scopus关键词: | Advection
; Carbon dioxide
; Diffusion
; Oceanography
; Tropics
; Diapycnal diffusion
; Diffusive process
; Global climate model
; Horizontal advection
; Model inter comparisons
; Qualitative differences
; Quasi equilibrium
; Sub-surface ocean
; Climate models
; advection
; carbon dioxide
; climate modeling
; convective system
; eddy
; global climate
; heat balance
; numerical model
; stratification
; wind forcing
; Southern Ocean
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| 英文摘要: | The quasi-equilibrium heat balances, as well as the responses to 4 × CO2 perturbation, are compared among three global climate models with the aim to identify and explain intermodel differences in ocean heat uptake (OHU) processes. It is found that, in quasi equilibrium, convective and mixed layer processes, as well as eddy-related processes, cause cooling of the subsurface ocean. The cooling is balanced by warming caused by advective and diapycnally diffusive processes. It is also found that in the CO2-perturbed climates the largest contribution to OHU comes from changes in vertical mixing processes and the mean circulation, particularly in the extratropics, caused both by changes in wind forcing and by changes in high-latitude buoyancy forcing. There is a substantial warming in the tropics: a significant part of which occurs because of changes in horizontal advection in extratropics. Diapycnal diffusion makes only a weak contribution to the OHU, mainly in the tropics, because of increased stratification. There are important qualitative differences in the contribution of eddy-induced advection and isopycnal diffusion to the OHU among the models. The former is related to the different values of the coefficients used in the corresponding scheme. The latter is related to the different tapering formulations of the isopycnal diffusion scheme. These differences affect the OHU in the deep ocean, which is substantial in two of the models, with the dominant region of deep warming being the Southern Ocean. However, most of the OHU takes place above 2000 m, and the three models are quantitatively similar in their global OHU efficiency and its breakdown among processes and as a function of latitude. © 2015 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/50849
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | National Centre for Atmospheric Science-Climate, Department of Meteorology, University of Reading, Reading, United Kingdom
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| Recommended Citation: | |
Exarchou E.,Kuhlbrodt T.,Gregory J.M.,et al. Ocean heat uptake processes: A model intercomparison[J]. Journal of Climate,2015-01-01,28(2)
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