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DOI | 10.1007/s00382-019-04882-2 |
Quasi-stationary extratropical wave trains associated with distinct tropical Pacific seasonal mean convection patterns: observational and AMIP model results | |
Ding, Shuoyi1,2; Chen, Wen2,3; Graf, Hans-F.2; Chen, Zhang4; Ma, Tianjiao2,3 | |
2019-08-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 53页码:2451-2476 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | In this paper, mechanisms for the formation of quasi-stationary extratropical wave trains associated with four distinct winter patterns of seasonal mean tropical Pacific convection anomalies, including the western CP (W-CP) pattern, La Nina (LN) pattern, CP El Nino (CPEN) pattern and EP El Nino (EPEN) pattern, are investigated by utilizing observational and six Atmospheric Model Intercomparison Project Phase 5 (AMIP5) high-skilled models (ACCESS1.0, CanAM4, CCSM4, CMCC-CM, HadGEM2-A, MPI-ESM-LR) datasets. The observational results show that tropical Pacific forcing induces upper-level anomalous Rossby wave source that force vorticity over the central North Pacific through modulating the local Hadley circulation, then excite eastward propagation of quasi-stationary planetary waves penetrating into the North Atlantic, and finally establish the associated teleconnections in mid- and high-latitudes by local synoptic eddy-mean flow interaction. Different structures of wave trains may be explained by evident differences in intensity and scale of the extratropical vorticity forcing originating from distinct convection anomalies over the tropical Pacific. The MME results further confirm the possible physical processes obtained from observations, but there still exist some significant differences. These cover the North Pacific and North America and can possibly be attributed to the models' simulation ability of extratropical vorticity forcing and local storm track intensity. In addition, the stratosphere-troposphere interaction plays an important role for extratropical atmospheric circulation anomalies. The stratospheric polar vortex not only modulates the underlying wave train, especially for the North Atlantic/Europe sector, but is also affected by the upper-tropospheric disturbance in high-latitudes through the upward wave activity flux. |
英文关键词 | Tropical Pacific convection Extratropical wave train Synoptic eddy-mean flow interaction Extratropical vorticity forcing Storm track |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000475558800071 |
WOS关键词 | FREQUENCY FLOW INTERACTION ; NORTH-ATLANTIC ; ATMOSPHERIC CIRCULATION ; SOUTHERN-OSCILLATION ; INTERANNUAL SEESAW ; ICELANDIC LOWS ; SYNOPTIC EDDY ; ACTIVITY FLUX ; POLAR VORTEX ; STORM TRACKS |
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/185465 |
专题 | 气候变化 |
作者单位 | 1.Fudan Univ, Inst Atmospher Sci, Shanghai, Peoples R China; 2.Chinese Acad Sci, Ctr Monsoon Syst Res, Inst Atmospher Phys, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Coll Earth & Planetary, Beijing, Peoples R China; 4.Chengdu Univ Informat Technol, Sch Atmospher Sci, Chengdu, Sichuan, Peoples R China |
推荐引用方式 GB/T 7714 | Ding, Shuoyi,Chen, Wen,Graf, Hans-F.,et al. Quasi-stationary extratropical wave trains associated with distinct tropical Pacific seasonal mean convection patterns: observational and AMIP model results[J]. CLIMATE DYNAMICS,2019,53:2451-2476. |
APA | Ding, Shuoyi,Chen, Wen,Graf, Hans-F.,Chen, Zhang,&Ma, Tianjiao.(2019).Quasi-stationary extratropical wave trains associated with distinct tropical Pacific seasonal mean convection patterns: observational and AMIP model results.CLIMATE DYNAMICS,53,2451-2476. |
MLA | Ding, Shuoyi,et al."Quasi-stationary extratropical wave trains associated with distinct tropical Pacific seasonal mean convection patterns: observational and AMIP model results".CLIMATE DYNAMICS 53(2019):2451-2476. |
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