DOI: 10.1007/s00382-014-2368-1
Scopus记录号: 2-s2.0-84940723789
论文题名: Role of sea surface temperature, Arctic sea ice and Siberian snow in forcing the atmospheric circulation in winter of 2012–2013
作者: Peings Y. ; Magnusdottir G.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 45, 期: 2017-05-06 起始页码: 1181
结束页码: 1206
语种: 英语
英文关键词: 2012–2013 winter
; Arctic sea ice
; Climate variability
; North Atlantic Oscillation
; Ocean-atmosphere interactions
; Siberian snow
英文摘要: During the 2012–2013 winter, the negative phase of the North Atlantic Oscillation (NAO) predominated, resulting in a cold winter over Europe and northern Asia punctuated by episodes of frigid weather. This climate anomaly is part of a recent trend towards negative values of the NAO index that has occurred over recent winters. The negative trend of the NAO may be related to atmospheric internal variability but it may also be partly forced by slowly varying components of the climate system. In the present study, we investigate the influence of surface conditions on the atmospheric circulation for the 2012–2013 winter using an atmospheric global climate model. In particular, the role of low Arctic sea ice concentration, warm tropical/North Atlantic sea surface temperature and positive Siberian snow cover anomalies are isolated by prescribing them in a set of different numerical experiments. Our simulations suggest that each of these surface forcings favored a negative NAO during the 2012–2013 winter. In our model, the combined NAO response to tropical/North Atlantic SST, Arctic sea ice and Siberian snow anomalies accounts for about 30 % of the observed NAO anomaly. Different physical mechanisms are explored to elucidate the atmospheric responses and are shown to involve both tropical and extratropical processes. © 2014, Springer-Verlag Berlin Heidelberg. 资助项目: NSF, National Science Foundation
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54030
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Department of Earth System Science, University of California, Irvine, Irvine, CA, United States
Recommended Citation:
Peings Y.,Magnusdottir G.. Role of sea surface temperature, Arctic sea ice and Siberian snow in forcing the atmospheric circulation in winter of 2012–2013[J]. Climate Dynamics,2015-01-01,45(2017-05-06)