DOI: 10.1007/s00382-017-3958-5
Scopus记录号: 2-s2.0-85032478041
论文题名: Circumglobal teleconnection and eddy control of variation in summer precipitation over Northwest China
作者: Leung M.Y.T. ; Zhou W.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 51, 期: 4 起始页码: 1351
结束页码: 1362
语种: 英语
英文关键词: Circumglobal teleconnection
; Climate shift
; Midlatitude eddies
; Moisture flux
Scopus关键词: annual variation
; eddy
; long-term change
; midlatitude environment
; moisture flux
; precipitation (climatology)
; summer
; teleconnection
; China
英文摘要: In this study, authors investigated both year-to-year variation and long-term changes in precipitation in Northwest China. Based on statistical analysis, anomalous regional rising motion and convergence of moisture flux are identified as the causes of year-to-year variation of precipitation in Northwest China. Aside from the year-to-year variation, long-term changes in these regional circulations also led to a significant enhancement of precipitation in Northwest China after the mid-1980 s. In addition, the changes in these regional circulations are controlled by anomalous eddies in the upper troposphere. The anomalous regional rising motion and the convergence of moisture flux are a result of the anomalous divergence of wind in the upper troposphere and southeasterly wind in the mid to lower troposphere. Both are induced by a negative center of eddy height in the upper troposphere to the west of Northwest China. It is also noted that the year-to-year variation of the negative center is concurrent with the circumglobal teleconnection. On the other hand, the long-term change in the negative center is concurrent with the weakening of midlatitude eddies in the mid-1980 s. © 2017, Springer-Verlag GmbH Germany. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109169
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
There are no files associated with this item.
作者单位: Guy Carpenter Asia-Pacific Climate Impact Center, School of Energy and Environment, City University of Hong Kong, Tat Chee Ave., Kowloon, Hong Kong
Recommended Citation:
Leung M.Y.T.,Zhou W.. Circumglobal teleconnection and eddy control of variation in summer precipitation over Northwest China[J]. Climate Dynamics,2018-01-01,51(4)