DOI: 10.1007/s00382-013-1984-5
Scopus记录号: 2-s2.0-84901983907
论文题名: On the relationships between features of the depth-latitude meridional overturning streamfunctions across global coupled climate models
作者: Plancherel Y.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 42, 期: 2017-11-12 起始页码: 2983
结束页码: 3004
语种: 英语
英文关键词: Climate model
; CMIP3
; Diagnostic
; Mean state
; Overturning circulation
; Parameterization
; Prediction
英文摘要: A comparative analysis of the state and response of the latitude-depth meridional overturning streamfunctions in the Climate Model Inter-comparison Project 3 (CMIP3) model set is presented. Simulated overturning strengths of the North Atlantic cell tend to converge towards observational estimates. The models whose simulations of the North Atlantic cell are closest to observational estimates indicate a 29.5 ± 13 % decrease in the maximum intensity of that cell by 2,100. In contrast, agreement with regard to the state and the response to anthropogenic radiative forcing of the global Southern Ocean abyssal cell is poor among the models. A weak relationship between the mean state and the response of the abyssal cell can be used to constrain the reduction of the Southern abyssal cell by 2,100 to 29.3 ± 20.7 %, in rough agreement with the decrease predicted in the Northern cell. The biases across the CMIP3 models in the Northern deep cell and Southern abyssal cell cannot be related dynamically by a buoyancy-based seesaw-like argument. The absence or presence of characteristic relationships between the state and evolution of different features of the overturning streamfunction indicate that the main reasons for across-model spread are how each model deals with subgrid-scale processes and viscosity. This highlights the fact that subgrid-scale parameterizations and resolution improvements should be a priority of model development. These factors are able to explain qualitatively the inter-model differences between the Northern overturning cells of the different models. Across-model differences in the winds over the Southern Ocean are responsible for much of the disparity in the overturning circulation cells of the Southern Ocean. © 2013 Springer-Verlag Berlin Heidelberg. 资助项目: NSF, National Science Foundation
; NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54403
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth Sciences, University of Oxford, Oxford, United Kingdom
Recommended Citation:
Plancherel Y.. On the relationships between features of the depth-latitude meridional overturning streamfunctions across global coupled climate models[J]. Climate Dynamics,2014-01-01,42(2017-11-12)