DOI: 10.1007/s00382-012-1518-6
Scopus记录号: 2-s2.0-84884703459
论文题名: Importance of oceanic resolution and mean state on the extra-tropical response to El Niño in a matrix of coupled models
作者: Dawson A. ; Matthews A.J. ; Stevens D.P. ; Roberts M.J. ; Vidale P.L.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 41, 期: 2017-05-06 起始页码: 1439
结束页码: 1452
语种: 英语
英文关键词: Basic state
; ENSO
; Extra-tropical SST
; GCM
; North Pacific
英文摘要: The extra-tropical response to El Niño in configurations of a coupled model with increased horizontal resolution in the oceanic component is shown to be more realistic than in configurations with a low resolution oceanic component. This general conclusion is independent of the atmospheric resolution. Resolving small-scale processes in the ocean produces a more realistic oceanic mean state, with a reduced cold tongue bias, which in turn allows the atmospheric model component to be forced more realistically. A realistic atmospheric basic state is critical in order to represent Rossby wave propagation in response to El Niño, and hence the extra-tropical response to El Niño. Through the use of high and low resolution configurations of the forced atmospheric-only model component we show that, in isolation, atmospheric resolution does not significantly affect the simulation of the extra-tropical response to El Niño. It is demonstrated, through perturbations to the SST forcing of the atmospheric model component, that biases in the climatological SST field typical of coupled model configurations with low oceanic resolution can account for the erroneous atmospheric basic state seen in these coupled model configurations. These results highlight the importance of resolving small-scale oceanic processes in producing a realistic large-scale mean climate in coupled models, and suggest that it might may be possible to "squeeze out" valuable extra performance from coupled models through increases to oceanic resolution alone. © 2012 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54792
Appears in Collections: 过去全球变化的重建
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作者单位: School of Mathematics, University of East Anglia, Norwich, United Kingdom; School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom; Met Office Hadley Centre, Exeter, United Kingdom; Department of Meteorology, National Centre for Atmospheric Science, University of Reading, Reading, United Kingdom; Atmospheric, Oceanic and Planetary Physics, Department of Physics, University of Oxford, Oxford, United Kingdom
Recommended Citation:
Dawson A.,Matthews A.J.,Stevens D.P.,et al. Importance of oceanic resolution and mean state on the extra-tropical response to El Niño in a matrix of coupled models[J]. Climate Dynamics,2013-01-01,41(2017-05-06)