DOI: 10.1007/s00382-017-3917-1
Scopus记录号: 2-s2.0-85029738664
论文题名: Analysis of the variability of the North Atlantic eddy-driven jet stream in CMIP5
作者: Iqbal W. ; Leung W.-N. ; Hannachi A.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 51, 期: 2018-01-02 起始页码: 235
结束页码: 247
语种: 英语
英文关键词: CMIP5
; evaluation
; Jet variability
; North Atlantic jet
Scopus关键词: atmospheric general circulation model
; CMIP
; eddy
; extratropical environment
; jet stream
; wind velocity
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: The North Atlantic eddy-driven jet is a dominant feature of extratropical climate and its variability is associated with the large-scale changes in the surface climate of midlatitudes. Variability of this jet is analysed in a set of General Circulation Models (GCMs) from the Coupled Model Inter-comparison Project phase-5 (CMIP5) over the North Atlantic region. The CMIP5 simulations for the 20th century climate (Historical) are compared with the ERA40 reanalysis data. The jet latitude index, wind speed and jet persistence are analysed in order to evaluate 11 CMIP5 GCMs and to compare them with those from CMIP3 integrations. The phase of mean seasonal cycle of jet latitude and wind speed from historical runs of CMIP5 GCMs are comparable to ERA40. The wind speed mean seasonal cycle by CMIP5 GCMs is overestimated in winter months. A positive (negative) jet latitude anomaly in historical simulations relative to ERA40 is observed in summer (winter). The ensemble mean of jet latitude biases in historical simulations of CMIP3 and CMIP5 with respect to ERA40 are - 2. 43 ∘ and - 1. 79 ∘ respectively. Thus indicating improvements in CMIP5 in comparison to the CMIP3 GCMs. The comparison of historical and future simulations of CMIP5 under RCP4.5 and RCP8.5 for the period 2076–2099, shows positive anomalies in the jet latitude implying a poleward shifted jet. The results from the analysed models offer no specific improvements in simulating the trimodality of the eddy-driven jet. © 2017, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109212
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Meteorology, Stockholm University, Stockholm, 10691, Sweden; ClusterTech Limited, Hong Kong, Hong Kong
Recommended Citation:
Iqbal W.,Leung W.-N.,Hannachi A.. Analysis of the variability of the North Atlantic eddy-driven jet stream in CMIP5[J]. Climate Dynamics,2018-01-01,51(2018-01-02)