气候变化领域集成服务门户(CCPortal): Atmospheric pathway between Atlantic multidecadal variability and European summer temperature in the atmospheric general circulation model ECHAM6

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DOI	10.1007/s00382-018-4578-4
	Atmospheric pathway between Atlantic multidecadal variability and European summer temperature in the atmospheric general circulation model ECHAM6
	Ghosh R.; Müller W.A.; Eichhorn A.; Baehr J.; Bader J.
发表日期	2019
ISSN	0930-7575
起始页码	209
结束页码	224
卷号	53 期号:2020-01-02
英文摘要	The Atlantic multidecadal variability (AMV) is known to affect the central to eastern (C–E) European summer climate through an associated atmospheric baroclinic response called North-Atlantic-European East West mode as demonstrated in the twentieth century reanalysis (20CRv2). Here, using the atmospheric model ECHAM6.3, we perform sensitivity experiments with prescribed sea surface temperature (SST) anomalies that are representative of the observed positive and the negative AMV phases and investigate the model response to the observed AMV pattern for European summer climate. The results from the experiments reveal that in the negative phase of AMV, the North-Atlantic-European (NAE) climate is mainly governed by the extra-tropical branch of the AMV through a baroclinic-like response. This response brings negative surface air temperature (SAT) anomalies over C–E Europe. The response and its influence are similar to what is found in the 20CRv2. In contrast, in the positive phase of the AMV, the NAE climate in the model experiments is mainly influenced by the tropical branch of the AMV. A stationary Rossby wave response excited in the tropics is associated with negative SAT anomalies over C–E Europe, which is opposite to what is found in the 20CRv2. The model response from the tropical part of the AMV SST is unlikely to be realistic due to the lack of coupled air–sea interaction, when SST is specified. Hence, the results demonstrate that ECHAM6.3 can simulate the observed linear baroclinic response, but only in the negative phase of the AMV. For the positive phase, in agreement with the previous findings, the model response is very sensitive to the tropical branch of the AMV and unrealistic. © 2018, The Author(s).
英文关键词	Atlantic multidecadal variability; Europe; Summer
语种	英语
scopus关键词	Atlantic Multidecadal Oscillation; atmospheric general circulation model; baroclinic mode; Rossby wave; sea surface temperature; summer; temperature anomaly; temperature profile; Europe
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146201
作者单位	International Max Planck Research School for Earth System Modelling, Max Planck Institute for Meteorology, Hamburg, Germany; Max Planck Institute for Meteorology, Hamburg, Germany; Deutscher Wetterdienst, Hamburg, Germany; Goethe University Frankfurt, Frankfurt, Germany; Institute of Oceanography, University of Hamburg, Hamburg, Germany; Uni Climate, Uni Research and the Bjerknes Centre for Climate Research, Bergen, Norway
推荐引用方式 GB/T 7714	Ghosh R.,Müller W.A.,Eichhorn A.,et al. Atmospheric pathway between Atlantic multidecadal variability and European summer temperature in the atmospheric general circulation model ECHAM6[J],2019,53(2020-01-02).
APA	Ghosh R.,Müller W.A.,Eichhorn A.,Baehr J.,&Bader J..(2019).Atmospheric pathway between Atlantic multidecadal variability and European summer temperature in the atmospheric general circulation model ECHAM6.Climate Dynamics,53(2020-01-02).
MLA	Ghosh R.,et al."Atmospheric pathway between Atlantic multidecadal variability and European summer temperature in the atmospheric general circulation model ECHAM6".Climate Dynamics 53.2020-01-02(2019).