Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD025893 |
Potential vorticity regimes over East Asia during winter | |
Huang, Wenyu1,2; Chen, Ruyan1,2; Wang, Bin1,2,3; Wright, Jonathon S.1,2; Yang, Zifan1,2; Ma, Wenqian1,2 | |
2017-02-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Nine potential vorticity (PV) regimes over East Asia are identified by applying a Self-Organizing Map and Hierarchical Ascendant Classification regime analysis to the daily PV reanalysis fields on the 300 K isentropic surface for December-March 1948-2014. According to the surface temperature anomalies over East Asia, these nine regimes are further classified into three classes, i. e., cold class (three regimes), warm class (four regimes), and neutral class (two regimes). The PV-based East Asian winter monsoon index (EAWMI) is used to study the relationship between PV distributions and the temperature anomalies. The magnitude of cold (warm) anomalies over the land areas of East Asia increases (decreases) quasi-linearly with the EAWMI. Regression analysis reveals that cold temperature anomalies preferentially occur when the EAWMI exceeds a threshold at similar to 0.2 PVU (where 1 PVU = 10(-6) m(2) K kg(-1) s(-1)). PV inversion uncovers the mechanisms behind the relationships between the PV regimes and surface temperature anomalies and reveals that cold (warm) PV regimes are associated with significant warming (cooling) in the upper troposphere and lower stratosphere. On average, cold regimes have longer durations than warm regimes. Interclass transition probabilities are much higher for paths from warm/neutral regimes to cold regimes than for paths from cold regimes to warm/neutral regimes. Besides, intraclass transitions are rare within the warm or neutral regimes. The PV regime analysis provides insight into the causes of severe cold spells over East Asia, with blocking circulation patterns identified as the primary factor in initiating and maintaining these cold spells. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396119200009 |
WOS关键词 | SELF-ORGANIZING MAPS ; WEATHER REGIMES ; COLD SURGES ; ARCTIC OSCILLATION ; CLIMATE-CHANGE ; TIME-SCALE ; 500 HPA ; MONSOON ; TELECONNECTIONS ; ASSOCIATION |
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/32368 |
专题 | 气候变化 |
作者单位 | 1.Tsinghua Univ, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China; 2.Tsinghua Univ, Dept Earth Syst Sci, Beijing, Peoples R China; 3.Chinese Acad Sci, State Key Lab Numer Modeling Atmospher Sci & Geop, Inst Atmospher Phys, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Huang, Wenyu,Chen, Ruyan,Wang, Bin,et al. Potential vorticity regimes over East Asia during winter[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(3). |
APA | Huang, Wenyu,Chen, Ruyan,Wang, Bin,Wright, Jonathon S.,Yang, Zifan,&Ma, Wenqian.(2017).Potential vorticity regimes over East Asia during winter.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(3). |
MLA | Huang, Wenyu,et al."Potential vorticity regimes over East Asia during winter".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.3(2017). |
条目包含的文件 | 条目无相关文件。 |
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