Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-17-0695.1 |
Preconditioning of Arctic Stratospheric Polar Vortex Shift Events | |
Huang, Jinlong1; Tian, Wenshou1; Gray, Lesley J.2; Zhang, Jiankai1; Li, Yan1; Luo, Jiali1; Tian, Hongying1 | |
2018-07-01 | |
发表期刊 | JOURNAL OF CLIMATE
![]() |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:14页码:5417-5436 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; England |
英文摘要 | This study examines the preconditioning of events in which the Arctic stratospheric polar vortex shifts toward Eurasia (EUR events), North America (NA events), and the Atlantic (ATL events) using composite analysis. An increase in blocking days over northern Europe and a decrease in blocking days over the Bering Strait favor the movement of the vortex toward Eurasia, while the opposite changes in blocking days over those regions favor the movement of the vortex toward North America. An increase in blocking days over the eastern North Atlantic and a decrease in blocking days over the Bering Strait are conducive to movement of the stratospheric polar vortex toward the Atlantic. These anomalous precursor blocking patterns are interpreted in terms of the anomalous zonal wave-1 or wave-2 planetary wave fluxes into the stratosphere that are known to influence the vortex position and strength. In addition, the polar vortex shift events are further classified into events with small and large polar vortex deformation, since the two types of events are likely to have a different impact at the surface. A significant difference in the zonal wave-2 heat flux into the lower stratosphere exists prior to the two types of events and this is linked to anomalous blocking patterns. This study further defines three types of tropospheric blocking events in which the spatial patterns of blocking frequency anomalies are similar to the blocking patterns prior to EUR, NA, and ATL events, respectively, and our reanalysis reveals that the polar vortex is indeed more likely to shift toward Eurasia, North America, and the Atlantic in the presence of the above three defined tropospheric blocking events. These shifts of the polar vortex toward Eurasia, North America, and the Atlantic lead to statistically significant negative height anomalies near the tropopause and corresponding surface cooling anomalies over these three regions. |
英文关键词 | Atmosphere Blocking Stratosphere-troposphere coupling Stratosphere |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000435075300005 |
WOS关键词 | NORTHERN-HEMISPHERE ; SUDDEN WARMINGS ; POTENTIAL VORTICITY ; UPPER-ATMOSPHERE ; PLANETARY-WAVES ; SURFACE WEATHER ; VARIABILITY ; BLOCKING ; WINTER ; PROPAGATION |
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/19740 |
专题 | 气候变化 |
作者单位 | 1.Lanzhou Univ, Coll Atmospher Sci, Key Lab Semiarid Climate Change, Minist Educ, Lanzhou, Gansu, Peoples R China; 2.Univ Oxford, Dept Phys, Natl Ctr Atmospher Sci, Oxford, England |
推荐引用方式 GB/T 7714 | Huang, Jinlong,Tian, Wenshou,Gray, Lesley J.,et al. Preconditioning of Arctic Stratospheric Polar Vortex Shift Events[J]. JOURNAL OF CLIMATE,2018,31(14):5417-5436. |
APA | Huang, Jinlong.,Tian, Wenshou.,Gray, Lesley J..,Zhang, Jiankai.,Li, Yan.,...&Tian, Hongying.(2018).Preconditioning of Arctic Stratospheric Polar Vortex Shift Events.JOURNAL OF CLIMATE,31(14),5417-5436. |
MLA | Huang, Jinlong,et al."Preconditioning of Arctic Stratospheric Polar Vortex Shift Events".JOURNAL OF CLIMATE 31.14(2018):5417-5436. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论