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DOI | 10.1175/JCLI-D-16-0261.1 |
Increased Quasi Stationarity and Persistence of Winter Ural Blocking and Eurasian Extreme Cold Events in Response to Arctic Warming. Part I: Insights from Observational Analyses | |
Yao, Yao1; Luo, Dehai1; Dai, Aiguo2,3; Simmonds, Ian4 | |
2017-05-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA; Australia |
英文摘要 | Part I of this study examines the relationship among winter cold anomalies over Eurasia, Ural blocking (UB), and the background conditions associated with Arctic warming over the Barents and Kara Seas (BKS) using reanalysis data. It is found that the intensity, persistence, and occurrence region of UB-related Eurasian cold anomalies depend strongly on the strength and vertical shear (VS) of the mean westerly wind (MWW) over mid-high-latitude Eurasia related to BKS warming. Observational analysis reveals that during 1951-2015 UB days are 64% (54%) more frequent during weak MWW (VS) winters, with 26.9 (28.4) days per winter, than during strong MWW (VS) winters. During weak MWWorVS winters, as frequently observed during 2000-15, persistent and large UB-related warming is seen over the BKS together with large and widespread midlatitude Eurasian cold anomalies resulting from increased quasi stationarity and persistence of the UB. By contrast, when the MWW or VS is strong as frequently observed during 1979-99, the cold anomaly is less intense and persistent and confined to a narrow region of Europe because of a rapid westward movement of the strong UB. For this case, the BKS warming is relatively weak and less persistent. The midlatitude cold anomalies are maintained primarily by reduced downward infrared radiation (IR), while the surface heat fluxes, IR, and advection all contribute to the BKS warming. Thus, the large BKS warming since 2000 weakens the meridional temperature gradient, MWW, and VS, which increases quasi stationarity and persistence of the UB (rather than its amplitude) and then leads to more widespread Eurasian cold events and further enhances the BKS warming. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000401006100002 |
WOS关键词 | SEA-ICE ; SURFACE ; TEMPERATURE ; CLIMATE ; AMPLIFICATION ; ATMOSPHERE ; MODEL ; LINK |
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/19647 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Reg Climate Environm Temperate East Asia, Beijing, Peoples R China; 2.SUNY Albany, Dept Atmospher & Environm Sci, Albany, NY 12222 USA; 3.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA; 4.Univ Melbourne, Sch Earth Sci, Parkville, Vic, Australia |
推荐引用方式 GB/T 7714 | Yao, Yao,Luo, Dehai,Dai, Aiguo,et al. Increased Quasi Stationarity and Persistence of Winter Ural Blocking and Eurasian Extreme Cold Events in Response to Arctic Warming. Part I: Insights from Observational Analyses[J]. JOURNAL OF CLIMATE,2017,30(10). |
APA | Yao, Yao,Luo, Dehai,Dai, Aiguo,&Simmonds, Ian.(2017).Increased Quasi Stationarity and Persistence of Winter Ural Blocking and Eurasian Extreme Cold Events in Response to Arctic Warming. Part I: Insights from Observational Analyses.JOURNAL OF CLIMATE,30(10). |
MLA | Yao, Yao,et al."Increased Quasi Stationarity and Persistence of Winter Ural Blocking and Eurasian Extreme Cold Events in Response to Arctic Warming. Part I: Insights from Observational Analyses".JOURNAL OF CLIMATE 30.10(2017). |
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