DOI: 10.1175/JCLI-D-14-00067.1
Scopus记录号: 2-s2.0-84916205952
论文题名: The different configurations of the East Asian polar front jet and subtropical jet and the associated rainfall anomalies over eastern China in summer
作者: Huang D.-Q. ; Zhu J. ; Zhang Y.-C. ; Huang A.-N.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 21 起始页码: 8205
结束页码: 8220
语种: 英语
Scopus关键词: Atmospheric temperature
; Coastal zones
; Jets
; Kinetic energy
; Kinetics
; Nickel
; Rain
; Submarine geophysics
; Surface properties
; Surface waters
; Convective activity
; Eastern north pacific
; Eddies
; Meridional temperature gradient
; Possible mechanisms
; Regional circulation
; Sea surface temperature (SST)
; Western North Pacific
; Oceanography
; eddy
; jet stream
; La Nina
; meridional circulation
; polar front
; precipitation intensity
; sea surface temperature
; stratosphere
; vortex flow
; Arctic
; China
; Far East
; Pacific Ocean
; Pacific Ocean (Central)
; Pacific Ocean (East)
; Pacific Ocean (North)
英文摘要: To investigate the concurrent impacts of the EastAsian polar front jet (EAPJ) and subtropical jet (EASJ) on the summer rainfall over eastern China, positive (strengthened EAPJ with weakened EASJ) and negative (weakened EAPJ with strengthened EASJ) configurations are identified. In the positive configuration, rainfall decreases in the northern part of eastern China and increases in the southern part, vice versa in the negative configuration. The possible mechanisms maintaining the two jet configurations are further proposed from the perspectives of sea surface temperature (SST) and synoptic-scale transient eddy activities (STEA). In the positive configuration, meridional distributed cold-warm SST anomalies over the eastern North Pacific may induce regional circulation and meridional temperature gradient anomalies, which can strengthen the EAPJ and weaken the EASJ. The central Pacific La Niña-like SST anomalies are related with the Arctic vortexlike anomalies in the stratosphere, which may strengthen the EAPJ. Furthermore, the divergence of Eliassen-Palm vectors and the conversion fromeddy kinetic energy to mean kinetic energy over the active region of the EAPJ may strengthen theEAPJ, vice versa for the weakened EASJ. In the negative configuration, associated with the warm SST anomalies over the western North Pacific, the enhanced convective activities may lead to a strengthened EASJ via meridional teleconnection. The teleconnection may be intensified by the strengthened easterly vertical shear. Additionally, eastern Pacific La Niña-like SST anomalies may intensify the Walker circulation,whichmay strengthen theEASJ via theHadley circulation. The STEA-related anomalies are almost opposite those in the positive configuration, especially for the weakened EAPJ. © 2014 American Meteorological Society. 资助项目: NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51009
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: School of Atmospheric Sciences, Nanjing University, Nanjing, China; State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, China
Recommended Citation:
Huang D.-Q.,Zhu J.,Zhang Y.-C.,et al. The different configurations of the East Asian polar front jet and subtropical jet and the associated rainfall anomalies over eastern China in summer[J]. Journal of Climate,2014-01-01,27(21)