DOI: 10.1175/JCLI-D-14-00308.1
Scopus记录号: 2-s2.0-84961356228
论文题名: Implications of ural blocking for East Asian winter climate in CMIP5 GCMs. Part I: Biases in the historical scenario
作者: Cheung H.H.N. ; Zhou W.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 6 起始页码: 2203
结束页码: 2216
语种: 英语
Scopus关键词: Regression analysis
; Asia
; Blocking
; Blocking index
; Coupled Model Intercomparison Project
; General circulation model
; Siberian highs
; Teleconnections
; Winter/cool seasons
; Climate models
; atmospheric blocking
; general circulation model
; jet stream
; teleconnection
; westerly
; winter
; Atlantic Ocean
; Atlantic Ocean (North)
; Europe
; Far East
; Siberia
英文摘要: This study assesses the ability of the 25 GCMs from phase 5 of the Coupled Model Intercomparison Project (CMIP5) to simulate Ural blocking (UB) and its linkage with the East Asian winter climate [December- February (DJF)] in a historical run (1950/51-2004/05). A Ural blocking index (UBI) is defined as the DJF-mean blocking frequency over 45°-90°E for each winter. Regression analyses suggest that the long-term mean bias of UBI is caused by the long-term mean circulation bias over the North Atlantic. On seasonal time scales, the GCMs simulating a positive bias of UBI are associated with a stronger Atlantic jet stream, as well as stronger westerly momentum fluxes from the North Atlantic to Europe. On synoptic time scales, however, these GCMs tend to be associated with a weaker Siberian high and East Asian trough during the evolution of a UB event. Altogether, there is no apparent linkage between the long-term mean bias ofUBand the East Asian winter climate. Further studies are needed to explore the teleconnection between UB and the East Asian winter climate in the GCMs. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50821
Appears in Collections: 气候变化事实与影响
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作者单位: Guy Carpenter Asia-Pacific Climate Impact Centre, School of Energy and Environment, City University of Hong Kong, Hong Kong, China; City University of Hong Kong, Shenzhen Research Institute, Shenzhen, China
Recommended Citation:
Cheung H.H.N.,Zhou W.. Implications of ural blocking for East Asian winter climate in CMIP5 GCMs. Part I: Biases in the historical scenario[J]. Journal of Climate,2015-01-01,28(6)