DOI: 10.1002/2016GL067989
论文题名: Revisiting the relationship between jet position, forced response, and annular mode variability in the southern midlatitudes
作者: Simpson I.R. ; Polvani L.M.
刊名: Geophysical Research Letters
ISSN: 0094-9256
EISSN: 1944-8987
出版年: 2016
卷: 43, 期: 6 起始页码: 2896
结束页码: 2903
语种: 英语
英文关键词: climate change
; eddy/mean flow feedbacks
; midlatitude westerlies
; model representation
; Southern Annular Mode
Scopus关键词: Climate change
; Climate models
; Climate forcings
; Coupled Model Intercomparison Project
; Forced response
; Midlatitudes
; Model representation
; Modeling behavior
; Southern Annular Mode
; Southern Hemisphere
; Fighter aircraft
; annual variation
; Antarctic Oscillation
; climate change
; climate feedback
; climate forcing
; climate modeling
; eddy
; jet flow
; midlatitude environment
; Southern Hemisphere
; westerly
英文摘要: Climate models exhibit a wide range in latitudinal position of the Southern Hemisphere westerly jet. Previous work has demonstrated, in the annual mean, that models with lower latitude jets, exhibit greater poleward jet shifts under climate forcings. It has been argued that this behavior is due to stronger eddy/mean flow feedbacks in models with lower latitude jets, as inferred from the timescale of the Southern Annular Mode (SAM). Here we revisit this question with a focus on seasonality. Using a larger set of models and forcing scenarios from the Coupled Model Intercomparison Project, phase 5, we find that the jet position/jet shift relationship is strong in winter but insignificant in summer, whereas the model spread in SAM timescales arises primarily in summer, with winter timescales similar across models. The results, therefore, question previous interpretations and motivate an improved understanding of the spread in model behavior. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84977987233&doi=10.1002%2f2016GL067989&partnerID=40&md5=6e36b826375278b527d61415d7911338
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10219
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Simpson I.R.,Polvani L.M.. Revisiting the relationship between jet position, forced response, and annular mode variability in the southern midlatitudes[J]. Geophysical Research Letters,2016-01-01,43(6).