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DOI | 10.1007/s00382-016-3309-y |
Cold season Africa-Asia multidecadal teleconnection pattern and its relation to the Atlantic multidecadal variability | |
Sun, Cheng1,2; Li, Jianping1,2; Ding, Ruiqiang3,4; Jin, Ze5 | |
2017-06-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 48期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | A prominent teleconnection pattern of multidecadal variability of cold season (November to April) upper-level atmospheric circulation over North Africa and Eurasia (NA-EA) is revealed by empirical orthogonal function analysis of the Twentieth Century Reanalysis data. This teleconnection pattern is characterized by an eastward propagating wave train with a zonal wavenumber of 5-6 between 20A degrees and 40A degrees N, extending from the northwest coast of Africa to East Asia, and thus is referred to as the Africa-Asia multidecadal teleconnection pattern (AAMT). One-point correlation maps show that the teleconnectivity of AAMT is strong and further demonstrate the existence of the AAMT. The AAMT shapes the spatial structure of multidecadal change in atmospheric circulation over the NA-EA region, and in particular the AAMT pattern and associated fields show similar structures to the change occurring around the early 1960s. A strong in-phase relationship is observed between the AAMT and Atlantic multidecadal variability (AMV) and this connection is mainly due to Rossby wave dynamics. Barotropic modeling results suggest that the upper-level Rossby wave source generated by the AMV can excite the AAMT wave train, and Rossby wave ray tracing analysis further highlights the role of the Asian jet stream in guiding the wave train to East Asia. The AAMT acts as an atmospheric bridge conveying the influence of AMV onto the downstream multidecadal climate variability. The AMV is closely related to the coordinated change in surface and tropospheric air temperatures over Northwest Africa, the Arabian Peninsula and Central China, which may result from the adiabatic expansion/compression of air associated with the AAMT. |
英文关键词 | Atlantic multidecadal variability Africa-Asia multidecadal teleconnection pattern Rossby wave train Africa-Asia multidecadal climate variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000402122200027 |
WOS关键词 | CLIMATE VARIABILITY ; WAVE-GUIDE ; OSCILLATION ; MONSOON ; OCEAN ; PROPAGATION ; MECHANISM ; TRENDS ; ENSO |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/35550 |
专题 | 气候变化 |
作者单位 | 1.Beijing Normal Univ, Coll Global Change & Earth Syst Sci GCESS, Beijing 100875, Peoples R China; 2.Joint Ctr Global Change Studies, Beijing 100875, Peoples R China; 3.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100029, Peoples R China; 4.Chengdu Univ Informat Technol, Plateau Atmosphere & Environm Key Lab Sichuan Pro, Chengdu 610225, Peoples R China; 5.Yunnan Univ, Dept Atmospher Sci, Kunming 650091, Peoples R China |
推荐引用方式 GB/T 7714 | Sun, Cheng,Li, Jianping,Ding, Ruiqiang,et al. Cold season Africa-Asia multidecadal teleconnection pattern and its relation to the Atlantic multidecadal variability[J]. CLIMATE DYNAMICS,2017,48(11). |
APA | Sun, Cheng,Li, Jianping,Ding, Ruiqiang,&Jin, Ze.(2017).Cold season Africa-Asia multidecadal teleconnection pattern and its relation to the Atlantic multidecadal variability.CLIMATE DYNAMICS,48(11). |
MLA | Sun, Cheng,et al."Cold season Africa-Asia multidecadal teleconnection pattern and its relation to the Atlantic multidecadal variability".CLIMATE DYNAMICS 48.11(2017). |
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