DOI: 10.1007/s00382-017-3624-y
Scopus记录号: 2-s2.0-85017475208
论文题名: Prolonged effect of the stratospheric pathway in linking Barents–Kara Sea sea ice variability to the midlatitude circulation in a simplified model
作者: Zhang P. ; Wu Y. ; Smith K.L.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-01-02 起始页码: 527
结束页码: 539
语种: 英语
英文关键词: Barents–Kara Sea sea ice
; Cold advection over central Asia
; Midlatitude low-level jet
; Nudging method
; Planetary-scale wave propagation
; Stratosphere–troposphere coupling
Scopus关键词: advection
; atmospheric circulation
; jet stream
; midlatitude environment
; planetary wave
; sea ice
; stratosphere-troposphere interaction
; wave propagation
; Arctic Ocean
; Barents Sea
; Central Asia
; Kara Sea
英文摘要: To better understand the dynamical mechanism that accounts for the observed lead-lag correlation between the early winter Barents–Kara Sea (BKS) sea ice variability and the later winter midlatitude circulation response, a series of experiments are conducted using a simplified atmospheric general circulation model with a prescribed idealized near-surface heating over the BKS. A prolonged effect is found in the idealized experiments following the near-surface heating and can be explicitly attributed to the stratospheric pathway and the long time scale in the stratosphere. The analysis of the Eliassen-Palm flux shows that, as a result of the imposed heating and linear constructive interference, anomalous upward propagating planetary-scale waves are excited and weaken the stratospheric polar vortex. This stratospheric response persists for approximately 1–2 months accompanied by downward migration to the troposphere and the surface. This downward migration largely amplifies and extends the low-level jet deceleration in the midlatitudes and cold air advection over central Asia. The idealized model experiments also suggest that the BKS region is the most effective in affecting the midlatitude circulation than other regions over the Arctic. © 2017, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109503
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: Department of Earth, Atmospheric and Planetary Sciences, Purdue University, West Lafayette, IN, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States
Recommended Citation:
Zhang P.,Wu Y.,Smith K.L.. Prolonged effect of the stratospheric pathway in linking Barents–Kara Sea sea ice variability to the midlatitude circulation in a simplified model[J]. Climate Dynamics,2018-01-01,50(2018-01-02)