DOI: 10.1175/JCLI-D-14-00790.1
Scopus记录号: 2-s2.0-84942898757
论文题名: Temperature variation over East Asia during the lifecycle of weak stratospheric polar vortex
作者: Woo S.-H. ; Kim B.-M. ; Kug J.-S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 14 起始页码: 5857
结束页码: 5872
语种: 英语
Scopus关键词: Atmospheric pressure
; Life cycle
; Temperature
; Temperature distribution
; Troposphere
; Vortex flow
; Anticyclonic anomalies
; North Atlantic oscillations
; Stratosphere-troposphere coupling
; Stratospheric circulations
; Stratospheric polar vortex
; Temperature fluctuation
; Temperature variation
; Tropospheric temperature
; Decay (organic)
; air temperature
; atmospheric circulation
; climate variation
; North Atlantic Oscillation
; polar vortex
; stratosphere
; temperature anomaly
; troposphere
; Far East
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: The authors investigate the circulation change during the life cycle of a weak stratospheric polar vortex (WSV) event and its impact on temperature variation over East Asia. The lower-tropospheric temperature over East Asia strongly fluctuates despite the slow decay of stratospheric circulation and the continuously negative Arctic Oscillation (AO) pattern during the WSV event. The temperature fluctuation is critically influenced by the variation of the East Asian upper-level coastal trough (EAT), which may be coupled to the stratospheric circulation during the WSV events. The EAT is deepened anomalously during the Peak phase (from lag -5 to lag 5 day) of the WSV, and East Asian temperature is lowest during this phase. During the next period (Decay-1 phase: from lag 6 to lag 16 day), in spite of the slowly decaying WSV condition, the cold temperature anomaly over East Asia is suddenly weakened; this change is caused by a westward-propagating signal of an anticyclonic anomaly from the North Pacific to East Asia. After about two weeks (Decay-2 phase: from lag 17 to lag 27 day), the cold conditions over East Asia are restrengthened by an intensification of EAT, which is related to the eastward propagation of a large-scale wave packet originating from a negative North Atlantic Oscillation (NAO)-type structure in the Decay-1 phase and its delayed influence on the East Asia region. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50489
Appears in Collections: 气候变化事实与影响
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作者单位: School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, South Korea; Division of Climate Change, Korea Polar Research Institute, Incheon, South Korea
Recommended Citation:
Woo S.-H.,Kim B.-M.,Kug J.-S.. Temperature variation over East Asia during the lifecycle of weak stratospheric polar vortex[J]. Journal of Climate,2015-01-01,28(14)