| DOI: | 10.1175/JCLI-D-16-0781.1
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| Scopus记录号: | 2-s2.0-85027251256
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| 论文题名: | Arctic stratosphere dynamical response to global warming |
| 作者: | Karpechko A.Y.; Manzini E.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2017
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| 卷: | 30, 期:17 | | 起始页码: | 7071
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| 结束页码: | 7086
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| 语种: | 英语
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| Scopus关键词: | Climate change
; Global warming
; Heat flux
; Oceanography
; Surface waters
; Troposphere
; Arctic Oscillation
; Brewer-Dobson circulation
; Climate model simulations
; Coupled Model Intercomparison Project
; Sea surface temperatures
; Stationary waves
; Stratosphere-troposphere coupling
; Stratospheric circulations
; Climate models
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| 英文摘要: | The role of stationary planetary waves in the dynamical response of the Arctic winter stratosphere circulation to global warming is investigated here by analyzing simulations performed with atmosphere-only models from phase 5 of the Coupled Model Intercomparison Project (CMIP5) driven by prescribed sea surface temperatures (SSTs). Climate models often simulate dynamical warming of the Arctic stratosphere as a response to global warming in association with a strengthening of the deep branch of the Brewer-Dobson circulation; however, until now, no satisfactory mechanism for such a response has been suggested. This study focuses on December-February (DJF) because this is the period when the troposphere and stratosphere are strongly coupled. When forced by increased SSTs, all the models analyzed here simulate Arctic stratosphere dynamical warming, mostly due to increased upward propagation of quasi-stationary wavenumber 1, as diagnosed by the meridional eddy heat flux. Further, it is shown that the stratospheric warming and increased wave flux to the stratosphere are related to the strengthening of the zonal winds in subtropics and midlatitudes near the tropopause. Evidence presented in this paper corroborate climate model simulations of future stratospheric changes and suggest a dynamical warming of the Arctic polar vortex as the most likely response to global warming. © 2017 American Meteorological Society. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/49820
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Arctic Research, Finnish Meteorological Institute, Helsinki, Finland; Max Planck Institute for Meteorology, Hamburg, Germany
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| Recommended Citation: | |
Karpechko A.Y.,Manzini E.. Arctic stratosphere dynamical response to global warming[J]. Journal of Climate,2017-01-01,30(17)
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