DOI: 10.1007/s00382-016-3283-4
Scopus记录号: 2-s2.0-84979987650
论文题名: Impact of observed North Atlantic multidecadal variations to European summer climate: a linear baroclinic response to surface heating
作者: Ghosh R. ; Müller W.A. ; Baehr J. ; Bader J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 48, 期: 2017-11-12 起始页码: 3547
结束页码: 3563
语种: 英语
英文关键词: Atlantic multidecadal variability
; Europe
; Linear baroclinic response
; Summer
英文摘要: The observed prominent multidecadal variations in the central to eastern (C–E) European summer temperature are closely related to the Atlantic multidecadal variability (AMV). Using the Twentieth Century Reanalysis project version 2 data for the period of 1930–2012, we present a mechanism by which the multidecadal variations in the C–E European summer temperature are associated to a linear baroclinic atmospheric response to the AMV-related surface heat flux. Our results suggest that over the north-western Atlantic, the positive heat flux anomaly triggers a surface baroclinic pressure response to diabatic heating with a negative surface pressure anomaly to the east of the heat source. Further downstream, this response induces an east-west wave-like pressure anomaly. The east-west wave-like response in the sea level pressure structure, to which we refer as North-Atlantic-European East West (NEW) mode, is independent of the summer North Atlantic Oscillation and is the principal mode of variations during summer over the Euro-Atlantic region at multidecadal time scales. The NEW mode causes warming of the C–E European region by creating an atmospheric blocking-like situation. Our findings also suggest that this NEW mode is responsible for the multidecadal variations in precipitation over the British Isles and north-western Europe. © 2016, The Author(s). 资助项目: FP7, Seventh Framework Programme
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53217
Appears in Collections: 过去全球变化的重建
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作者单位: International Max Planck Research School on Earth System Modelling, Max Planck Institute for Meteorology, Hamburg, Germany; Max Planck Institute for Meteorology, Hamburg, Germany; Institute of Oceanography, University of Hamburg, Hamburg, Germany
Recommended Citation:
Ghosh R.,Müller W.A.,Baehr J.,et al. Impact of observed North Atlantic multidecadal variations to European summer climate: a linear baroclinic response to surface heating[J]. Climate Dynamics,2017-01-01,48(2017-11-12)