DOI: 10.1175/JCLI-D-17-0495.1
Scopus记录号: 2-s2.0-85052964467
论文题名: The impact of stratospheric circulation extremes on minimum arctic sea ice extent
作者: Smith K.L. ; Polvani L.M. ; Tremblay L.B.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 18 起始页码: 7169
结束页码: 7183
语种: 英语
英文关键词: Arctic
; Arctic oscillation
; Interannual variability
; Sea ice
; Stratosphere-troposphere coupling
Scopus关键词: Climatology
; Troposphere
; Upper atmosphere
; Arctic
; Arctic Oscillation
; Extratropical atmospheric variability
; General circulation model
; Interannual variability
; Stratosphere-troposphere coupling
; Stratospheric circulations
; Stratospheric sudden warmings
; Sea ice
英文摘要: Given the rapidly changing Arctic climate, there is an urgent need for improved seasonal predictions of Arctic sea ice. Yet, Arctic sea ice prediction is inherently complex. Among other factors, wintertime atmospheric circulation has been shown to be predictive of summertime Arctic sea ice extent. Specifically, many studies have shown that the interannual variability of summertimeArctic sea ice extent (SIE) is anticorrelated with the leading mode of extratropical atmospheric variability, the Arctic Oscillation (AO), in the preceding winter. Given this relationship, the potential predictive role of stratospheric circulation extremes and stratosphere-troposphere coupling in linking the AO and Arctic SIE variability is examined. It is shown that extremes in the stratospheric circulation during the winter season, namely, stratospheric sudden warming (SSW) and strong polar vortex (SPV) events, are associated with significant anomalies in sea ice concentration in the Barents Sea in spring and along the Eurasian coastline in summer in both observations and a fully coupled, stratosphere-resolving general circulation model. Consistent with previous work on the AO, it is shown that SSWs, which are followed by the negative phase of the AO at the surface, result in sea ice growth, whereas SPVs, which are followed by the positive phase of the AO at the surface, result in sea ice loss, although the mechanisms in the Barents Sea and along the Eurasian coastline are different. The analysis suggests that the presence or absence of stratospheric circulation extremes in wintermay play a nontrivial role in determining total September Arctic SIE when combined with other factors. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111399
Appears in Collections: 气候减缓与适应
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作者单位: Lamont-Doherty Earth Observatory, Palisades, NY, United States; Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States; Department of Earth and Environmental Sciences, Columbia University, New York, NY, United States; Department of Atmospheric and Oceanic Sciences, McGill University, Montreal, QC, Canada; Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, ON, Canada
Recommended Citation:
Smith K.L.,Polvani L.M.,Tremblay L.B.. The impact of stratospheric circulation extremes on minimum arctic sea ice extent[J]. Journal of Climate,2018-01-01,31(18)