DOI: 10.1175/JCLI-D-17-0344.1
Scopus记录号: 2-s2.0-85043706469
论文题名: The North Pacific Gyre Oscillation and mechanisms of its decadal variability in CMIP5 models
作者: Li Yi D. ; Gan B. ; Wu L. ; Miller A.J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 6 起始页码: 2487
结束页码: 2509
语种: 英语
英文关键词: Atmosphere-ocean interaction
; Decadal variability
; Model evaluation/performance
; North Pacific Ocean
; North Pacific Oscillation
; Teleconnections
Scopus关键词: Atmospheric thermodynamics
; Climate models
; Oceanography
; Sea level
; Stochastic systems
; Surface waters
; Time measurement
; Atmosphere-ocean interactions
; Decadal variability
; Model evaluation/performance
; North Pacific
; North Pacific Ocean
; Teleconnections
; Stochastic models
英文摘要: Based on the Simple Ocean Data Assimilation (SODA) product and 37 models from phase 5 of the Coupled Model Intercomparison Project (CMIP5) database, the North Pacific Gyre Oscillation (NPGO) and its decadal generation mechanisms are evaluated by studying the second leading modes of North Pacific sea surface height (SSH) and sea level pressure (SLP) as well as their dynamical connections. It is found that 17 out of 37 models can well simulate the spatial pattern and decadal time scales (10-30 yr) of the NPGO mode, which resembles the observation-based SODA results. Dynamical connections between the oceanic mode (NPGO) and the atmospheric mode [North Pacific Oscillation (NPO)] are strongly evident in both SODA and the 17 models. In particular, about 30%-40% of the variance of the NPGO variability, which generally exhibits a preferred time scale, can be explained by the NPO variability, which has no preferred time scale in most models. Two mechanisms of the decadal NPGO variability that had been proposed by previous studies are evaluated in SODA and the 17 models: 1) stochastic atmospheric forcing and oceanic spatial resonance and 2) low-frequency atmospheric teleconnections excited by the equatorial Pacific. Evaluation reveals that these two mechanisms are valid in SODA and two models (CNRM-CM5 and CNRM-CM5.2), whereas two models (CMCC-CM and CMCC-CMS) prefer the first mechanism and another two models (CMCC-CESM and IPSL-CM5B-LR) prefer the second mechanism. The other 11 models have no evident relations with the proposed two mechanisms, suggesting the need for a fundamental understanding of the decadal NPGO variability in the future. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111638
Appears in Collections: 气候减缓与适应
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作者单位: Physical Oceanography Laboratory, Collaborative Innovation Center of Marine Science and Technology, Ocean University of China, Qingdao, China; Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Scripps Institution of Oceanography, La Jolla, CA, United States
Recommended Citation:
Li Yi D.,Gan B.,Wu L.,et al. The North Pacific Gyre Oscillation and mechanisms of its decadal variability in CMIP5 models[J]. Journal of Climate,2018-01-01,31(6)