DOI: 10.1007/s00382-015-2639-5
Scopus记录号: 2-s2.0-84957437779
论文题名: Investigation of the atmospheric mechanisms related to the autumn sea ice and winter circulation link in the Northern Hemisphere
作者: King M.P. ; Hell M. ; Keenlyside N.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 46, 期: 2017-03-04 起始页码: 1185
结束页码: 1195
语种: 英语
英文关键词: Climate impact of Arctic sea ice
; North Atlantic Oscillation
; Sea ice-atmosphere interaction
; Stratosphere downward propagation
英文摘要: The relationship of Barents–Kara sea ice concentration in October and November with atmospheric circulation in the subsequent winter is examined using reanalysis and observational data. The analyses are performed on data with the 5-year running means removed to reduce the potential effects of slowly-varying external driving factors, such as global warming. We show that positive (negative) Barents–Kara sea ice concentration anomaly in autumn is associated with a positive (negative) North Atlantic Oscillation-like (NAO) pattern with lags of up to 3 months. The month-to-month variations in the lag relationships of the atmospheric anomalies related to November sea ice concentration are presented. Further analysis shows that the stratosphere-troposphere interaction may provide the memory in the system: positive (negative) sea ice concentration anomaly in November is associated with a strengthened (weakened) stratospheric polar vortex and these anomalies propagate downward leading to the positive (negative) NAO-like pattern in the late December to early January. This stratosphere mechanism may also play a role for Barents–Kara sea ice anomaly in December, but not for September and October. Consistently, Eliassen-Palm, eddy heat and momentum fluxes suggest that there is strong forcing of the zonal winds in November. © 2015, Springer-Verlag Berlin Heidelberg. 资助项目: NOAA, National Oceanic and Atmospheric Administration
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53821
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Uni Research, and Bjerknes Centre for Climate Research, Allegaten 70, Bergen, Norway; GEOMAR, University of Kiel, Kiel, Germany; ETH, Zurich, Switzerland; Geophysical Institute, University of Bergen, and Bjerknes Centre for Climate Research, Allegaten 70, Bergen, Norway
Recommended Citation:
King M.P.,Hell M.,Keenlyside N.. Investigation of the atmospheric mechanisms related to the autumn sea ice and winter circulation link in the Northern Hemisphere[J]. Climate Dynamics,2016-01-01,46(2017-03-04)