DOI: 10.1007/s00382-012-1565-z
Scopus记录号: 2-s2.0-84888072587
论文题名: Evaluation and response of winter cold spells over Western Europe in CMIP5 models
作者: Peings Y. ; Cattiaux J. ; Douville H.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 41, 期: 2017-11-12 起始页码: 3025
结束页码: 3037
语种: 英语
英文关键词: Climate extremes
; CMIP5 models
; Cold spells
; European climate
; Models evaluation
英文摘要: This paper is dedicated to the analysis of winter cold spells over Western Europe in the simulations of the 5th phase of the Coupled Model Intercomparison Project (CMIP5). Both model biases and responses in a warming climate are discussed using historical simulations and the 8.5 W/m2 Representative Concentration Pathway (RCP8.5) scenario, respectively on the 1979-2008 and 2070-2099 periods. A percentile-based index (10th percentile of daily minimum temperature, Q10) with duration and spatial extent criteria is used to define cold spells. Related diagnostics (intensity, duration, extent, and severity as a combination of the former three statistics) of 13 models are compared to observations and suggest that models biases on severity are mainly due to the intensity parameter rather than to duration and extent. Some hypotheses are proposed to explain these biases, that involve large-scale dynamics and/or radiative fluxes related to clouds. Evolution of cold spells characteristics by the end of the century is then discussed by comparing RCP8.5 and historical simulations. In line with the projected rise of mean temperature, "present-climate" cold spells (computed with the 1979-2008 10th percentile, Q10P) are projected to be much less frequent and, except in one model, less severe. When cold spells are defined from the future 10th percentile threshold ("future-climate" cold spells, Q10F), all models simulate a decrease of their intensity linearly related to the seasonal mean warming. Some insights are given to explain the inter-model diversity in the magnitude of the cold spells response. In particular, the snow-albedo feedback is suggested to play an important role, while for some models changes in large-scale dynamics are also not negligible. © 2012 Springer-Verlag Berlin Heidelberg. 资助项目: French National Research Agency
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54710
Appears in Collections: 过去全球变化的重建
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作者单位: CNRM-GAME, Météo-France and CNRS, Toulouse, France; CNRM/GMGEC/VDR, 42 avenue Gaspard Coriolis, 31057 Toulouse Cedex 01, France
Recommended Citation:
Peings Y.,Cattiaux J.,Douville H.. Evaluation and response of winter cold spells over Western Europe in CMIP5 models[J]. Climate Dynamics,2013-01-01,41(2017-11-12)