globalchange  > 影响、适应和脆弱性
DOI: 10.1002/jgrd.50231
论文题名:
Multi-model analysis of Northern Hemisphere winter blocking: Model biases and the role of resolution
作者: Anstey J.A.; Davini P.; Gray L.J.; Woollings T.J.; Butchart N.; Cagnazzo C.; Christiansen B.; Hardiman S.C.; Osprey S.M.; Yang S.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期:10
起始页码: 3956
结束页码: 3971
语种: 英语
英文关键词: blocking ; jet ; stratosphere
Scopus关键词: Climate models ; Jets ; Troposphere ; blocking ; Controlled experiment ; Coupled atmosphere ocean general circulation model ; Coupled Model Intercomparison Project ; Horizontal resolution ; Lowermost stratosphere ; Multi-model ensemble ; Realistic variability ; Upper atmosphere ; general circulation model ; jet stream ; Northern Hemisphere ; spatial resolution ; stratosphere ; winter ; Arctic ; Atlantic Ocean ; Europe ; Greenland ; Pacific Ocean
英文摘要: Blocking of the tropospheric jet stream during Northern Hemisphere winter (December-January-February) is examined in a multi-model ensemble of coupled atmosphere-ocean general circulation models (GCMs) obtained from the Coupled Model Intercomparison Project Phase 5 (CMIP5). The CMIP5 models exhibit large biases in blocking frequency and related biases in tropospheric jet latitude, similar to earlier generations of GCMs. Underestimated blocking at high latitudes, especially over Europe, is common. In general, model biases decrease as model resolution increases. Increased blocking frequency at high latitudes in both the Atlantic and Pacific basins, as well as more realistic variability of Atlantic jet latitude, are associated with increased vertical resolution in the mid-troposphere to lowermost stratosphere. Finer horizontal resolution is associated with higher blocking frequency at all latitudes in the Atlantic basin but appears to have no systematic impact on blocking near Greenland or in the Pacific basin. Results from the CMIP5 analysis are corroborated by additional controlled experiments using selected GCMs. Key PointsCMIP5 models have large blocking biases and associated jet biasesIncreased spatial resolution is associated with reduced blocking and jet biasesVertical and horizontal resolution give blocking changes in different regions ©2013. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63721
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Atmospheric, Oceanic and Planetary Physics, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, United Kingdom; Centro Euro-Mediterraneo per i Cambiamenti Climatici, Bologna, Italy; Department of Meteorology, University of Reading, Reading, United Kingdom; Met Office Hadley Centre, Exeter, United Kingdom; Istituto di Scienze dell'Atmosfera e Del Clima, Rome, Italy; Danish Meteorological Institute, Danish Climate Centre, Copenhagen, Denmark; National Centre for Atmospheric Science, Department of Physics, University of Oxford, Oxford, United Kingdom; Ca' Foscari University, Venezia, Italy

Recommended Citation:
Anstey J.A.,Davini P.,Gray L.J.,et al. Multi-model analysis of Northern Hemisphere winter blocking: Model biases and the role of resolution[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(10)
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