DOI: 10.1007/s00382-013-1970-y
Scopus记录号: 2-s2.0-84906941614
论文题名: On the misinterpretation of the North Atlantic Oscillation in CMIP5 models
作者: Davini P. ; Cagnazzo C.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 43, 期: 2017-05-06 起始页码: 1497
结束页码: 1511
语种: 英语
英文关键词: Atlantic jet stream
; Atmospheric blocking
; CMIP5
; North Atlantic Oscillation
英文摘要: The representation of the wintertime North Atlantic Oscillation (NAO) and its relationship with atmospheric blocking and the Atlantic jet stream is investigated in a set of CMIP5 models. It is shown that some state-of-the-art climate models are unable to correctly simulate the physical processes connected to the NAO. This is especially true for models with a strongly underestimated frequency of high-latitude blocking over Greenland. In these models the first empirical orthogonal function (EOF1) of the Euro-Atlantic sector can represent at least three different categories of dominant modes of variability associated with different prevalent regions of blocking occurrence and jet stream displacements. It is therefore possible to show that such "biased NAOs" are connected with different dynamical processes with respect to the canonical NAO seen in observations. Since the NAO is a widely used concept in scientific community, the consequent "dynamical misinterpretation" of the NAO that can result when climate models are analyzed may have important implications for the NAO-related studies. This may be especially relevant for the ones involving climate scenarios, since these modeled NAOs may react differently to greenhouse gas forcing. © 2013 Springer-Verlag Berlin Heidelberg.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54496
Appears in Collections: 过去全球变化的重建
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作者单位: Istituto di Scienze dell'Atmosfera e del Clima, ISAC-CNR, Corso Fiume 4, 10133 Turin, Italy; Istituto di Scienze dell'Atmosfera e del Clima, ISAC-CNR, Rome, Italy
Recommended Citation:
Davini P.,Cagnazzo C.. On the misinterpretation of the North Atlantic Oscillation in CMIP5 models[J]. Climate Dynamics,2014-01-01,43(2017-05-06)