Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019JD030966 |
Seasonal Evolution of the Quasi-biennial Oscillation Impact on the Northern Hemisphere Polar Vortex in Winter | |
Zhang, Jiankai1; Xie, Fei2; Ma, Zhichao1; Zhang, Chongyang1; Xu, Mian1; Wang, Tao1; Zhang, Ruhua1 | |
2019-12-05 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Using potential vorticity to define Northern Hemisphere (NH) stratospheric polar vortex strength and position, the influence of the QBO on the polar vortex in winter is analyzed. The results show that the weakened/enhanced NH polar vortex in the lower stratosphere during easterly/westerly QBO (E/WQBO) phases is more noticeable in January and February than in November and December. Furthermore, the NH polar vortex shows a shift toward the Eurasian continent and away from North America in winter during EQBO phases compared with that during WQBO phases, with a greater shift in January and February than in November and December. The weaker QBO impact on the zonal mean zonal wind and temperature in February found in previous studies may be related to the cancelling effects of opposite-signed anomalies over Eurasia and North America induced by the polar vortex shift associated with the QBO. During EQBO phases the upper stratospheric easterly anomalies in early winter increase the frequency of negative refractive index in the middle and high latitudes in late winter. Less planetary wave 1 propagates upward into the upper stratosphere and more wave 1 accumulates in the lower stratosphere, leading to the weakening and shift of the polar vortex in late winter. In addition, the poleward displacement of the subtropical jet during EQBO phases causes more poleward propagation of synoptic-scale waves in the lower stratosphere, and thus more Rossby wave breaking events over Eurasia in late winter than during WQBO phases, further weakening and shifting the polar vortex in EQBO phases. |
英文关键词 | Quasi-biennial oscillation Polar vortex Stratosphere |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000500662500001 |
WOS关键词 | EQUATORIAL UPPER-STRATOSPHERE ; CIRCULATION ; SHIFT ; CLIMATOLOGY ; VARIABILITY ; MODEL |
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/225842 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Lanzhou Univ, Coll Atmospher Sci, Minist Educ, Key Lab Semiarid Climate Change, Lanzhou, Gansu, Peoples R China; 2.Beijing Normal Univ, Coll Global Change & Earth Syst Sci, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, Jiankai,Xie, Fei,Ma, Zhichao,et al. Seasonal Evolution of the Quasi-biennial Oscillation Impact on the Northern Hemisphere Polar Vortex in Winter[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019. |
APA | Zhang, Jiankai.,Xie, Fei.,Ma, Zhichao.,Zhang, Chongyang.,Xu, Mian.,...&Zhang, Ruhua.(2019).Seasonal Evolution of the Quasi-biennial Oscillation Impact on the Northern Hemisphere Polar Vortex in Winter.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES. |
MLA | Zhang, Jiankai,et al."Seasonal Evolution of the Quasi-biennial Oscillation Impact on the Northern Hemisphere Polar Vortex in Winter".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES (2019). |
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