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DOI | 10.1007/s00382-017-3564-6 |
The structure and large-scale organization of extreme cold waves over the conterminous United States | |
Xie, Zuowei1,2; Black, Robert X.1; Deng, Yi1 | |
2017-12-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 49 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Peoples R China |
英文摘要 | Extreme cold waves (ECWs) occurring over the conterminous United States (US) are studied through a systematic identification and documentation of their local synoptic structures, associated large-scale meteorological patterns (LMPs), and forcing mechanisms external to the US. Focusing on the boreal cool season (November-March) for 1950aEuro'2005, a hierarchical cluster analysis identifies three ECW patterns, respectively characterized by cold surface air temperature anomalies over the upper midwest (UM), northwestern (NW), and southeastern (SE) US. Locally, ECWs are synoptically organized by anomalous high pressure and northerly flow. At larger scales, the UM LMP features a zonal dipole in the mid-tropospheric height field over North America, while the NW and SE LMPs each include a zonal wave train extending from the North Pacific across North America into the North Atlantic. The Community Climate System Model version 4 (CCSM4) in general simulates the three ECW patterns quite well and successfully reproduces the observed enhancements in the frequency of their associated LMPs. La Nia and the cool phase of the Pacific Decadal Oscillation (PDO) favor the occurrence of NW ECWs, while the warm PDO phase, low Arctic sea ice extent and high Eurasian snow cover extent (SCE) are associated with elevated SE-ECW frequency. Additionally, high Eurasian SCE is linked to increases in the occurrence likelihood of UM ECWs. |
英文关键词 | Extreme cold wave Large-scale meteorological pattern Pacific decadal oscillation Sea ice Snow cover |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000415579000026 |
WOS关键词 | CLIMATE VARIABILITY ; WINTER ; BLOCKING ; MODES |
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/36132 |
专题 | 气候变化 |
作者单位 | 1.Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA; 2.Chinese Acad Sci, Inst Atmospher Phys, Int Ctr Climate & Environm Sci, Beijing 100029, Peoples R China |
推荐引用方式 GB/T 7714 | Xie, Zuowei,Black, Robert X.,Deng, Yi. The structure and large-scale organization of extreme cold waves over the conterminous United States[J]. CLIMATE DYNAMICS,2017,49. |
APA | Xie, Zuowei,Black, Robert X.,&Deng, Yi.(2017).The structure and large-scale organization of extreme cold waves over the conterminous United States.CLIMATE DYNAMICS,49. |
MLA | Xie, Zuowei,et al."The structure and large-scale organization of extreme cold waves over the conterminous United States".CLIMATE DYNAMICS 49(2017). |
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