DOI: 10.1002/grl.50927
论文题名: A practical method to identify displaced and split stratospheric polar vortex events
作者: Seviour W.J.M. ; Mitchell D.M. ; Gray L.J.
刊名: Geophysical Research Letters
ISSN: 0094-8472
EISSN: 1944-8203
出版年: 2013
卷: 40, 期: 19 起始页码: 5268
结束页码: 5273
语种: 英语
英文关键词: stratosphere- troposphere interaction
; stratospheric dynamics
; stratospheric sudden warmings
Scopus关键词: Arctic Oscillation
; Climate model simulations
; Geo-potential heights
; Practical method
; Stratospheric polar vortex
; Stratospheric sudden warmings
; Vortex-splitting events
; Weather patterns
; Climate change
; Climate models
; Upper atmosphere
; Vortex flow
; accuracy assessment
; Arctic Oscillation
; climate change
; climate modeling
; measurement method
; polar vortex
; simulation
; stratosphere
英文摘要: Extreme variability of the stratospheric polar vortex during winter can manifest as a displaced vortex event or a split vortex event. The influence of this vortex disruption can extend downwards and affect surface weather patterns. In particular, vortex splitting events have been associated with a negative Arctic Oscillation pattern. An assessment of the impacts of climate change on the polar vortex is therefore important, and more climate models now include a wella-resolved stratosphere. To aid this analysis, we introduce a practical thresholda-based method to distinguish between displaced and split vortex events. It requires only geopotential height at 10 hPa to measure the geometry of the vortex using twoa-dimensional moment diagnostics. It captures extremes of vortex variability at least, as well as previous methods when applied to reanalysis data, and has the advantage of being easily employed to analyze climate model simulations. Key Points It is important to distinguish split and displaced vortex events Current methods to do so are not easily-applicable to climate models A new method is easily-applicable and can accurately identify these events ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84884795961&doi=10.1002%2fgrl.50927&partnerID=40&md5=dac5e613c9bc8ac6a0239a4e2c94dbc5
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5736
Appears in Collections: 气候减缓与适应
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作者单位: Department of Physics, University of Oxford, Oxford, United Kingdom
Recommended Citation:
Seviour W.J.M.,Mitchell D.M.,Gray L.J.. A practical method to identify displaced and split stratospheric polar vortex events[J]. Geophysical Research Letters,2013-01-01,40(19).