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标题：Slow and Intraseasonal Modes of the Boreal Winter Atmospheric Circulation Simulated by CMIP5 Models
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作者：Ying Kai-Ran ; Zhao Tian-Bao ; Zheng Xiao-Gu 等
期刊名称：Atmospheric and Oceanic Science Letters
印刷版ISSN：1674-2834
电子版ISSN：2376-6123
出版年度：2014
卷号：7
期号：1
页码：34-41
DOI：10.3878/j.issn.1674-2834.13.0058
出版社：Taylor and Francis Ltd
摘要：The authors evaluate the performance of models from Coupled Model Intercomparison Project Phase 5 (CMIP5) in simulating the historical (1951–2000) modes of interannual variability in the seasonal mean Northern Hemisphere (NH) 500 hPa geopotential height during winter (December-January-February, DJF).The analysis is done by using a variance decomposition method, which is suitable for studying patterns of inter-annual variability arising from intraseasonal variability and slow variability (time scales of a season or longer).Overall, compared with reanalysis data, the spatial structure and variance of the leading modes in the intraseasonal component are generally well reproduced by the CMIP5 models, with few clear differences between the models.However, there are systematic discrepancies among the models in their reproduction of the leading modes in the slow component.These modes include the dominant slow patterns, which can be seen as features of the Pacific-North American pattern, the North Atlantic Oscillation/Arctic Oscillation, and the Western Pacific pattern.An overall score is calculated to quantify how well models reproduce the three leading slow modes of variability.Ten models that reproduce the slow modes of variability relatively well are identified.
关键词：modes of variability ; atmospheric circulation ; intraseasonal component ; slow component