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  Troposphere–stratosphere response to large-scale North Atlantic Ocean variability in an atmosphere/ocean coupled model

Omrani, N.-E., Bader, J., Keenlyside, N., & Manzini, E. (2016). Troposphere–stratosphere response to large-scale North Atlantic Ocean variability in an atmosphere/ocean coupled model. Climate Dynamics, 46, 1397-1415. doi:10.1007/s00382-015-2654-6.

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アイテムのパーマリンク: https://hdl.handle.net/11858/00-001M-0000-0027-8114-9 版のパーマリンク: https://hdl.handle.net/11858/00-001M-0000-002C-3E60-C
資料種別: 学術論文

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art%3A10.1007%2Fs00382-015-2654-6.pdf (出版社版), 21MB
 
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art%3A10.1007%2Fs00382-015-2654-6.pdf
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制限付き (Max Planck Institute for Meteorology, MHMT; )
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382_2015_2654_MOESM1_ESM.docx (付録資料), 5MB
 
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382_2015_2654_MOESM1_ESM.docx
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Supplementary Material, Verlagsserver
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作成者

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 作成者:
Omrani, N.-E., 著者
Bader, Juergen1, 著者           
Keenlyside, N.S., 著者
Manzini, Elisa2, 著者           
所属:
1Climate Dynamics, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society, ou_913568              
2Minerva Research Group Stratosphere and Climate, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society, ou_2301693              

内容説明

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キーワード: North Atlantic oscillation (NAO); Northern annular mode (NAM); Stratosphere/troposphere coupling; North Atlantic variability (NAV); Atlantic multidecadal variability (AMV); Atlantic multidecadal oscillation (AMO); Ocean-atmosphere interaction; SEA-SURFACE TEMPERATURE; CLIMATE VARIABILITY; ANNULAR MODES; THERMOHALINE CIRCULATION; MULTIDECADAL VARIABILITY; EXTRATROPICAL CIRCULATION; INTERDECADAL VARIATIONS; EUROPEAN REGION; OSCILLATION; SIMULATIONS
 要旨: The instrumental records indicate that the basin-wide wintertime North Atlantic warm conditions are accompanied by a pattern resembling negative North Atlantic oscillation (NAO), and cold conditions with pattern resembling the positive NAO. This relation is well reproduced in a control simulation by the stratosphere resolving atmosphere–ocean coupled Max-Planck-Institute Earth System Model (MPI-ESM). Further analyses of the MPI-ESM model simulation shows that the large-scale warm North Atlantic conditions are associated with a stratospheric precursory signal that propagates down into the troposphere, preceding the wintertime negative NAO. Additional experiments using only the atmospheric component of MPI-ESM (ECHAM6) indicate that these stratospheric and tropospheric changes are forced by the warm North Atlantic conditions. The basin-wide warming excites a wave-induced stratospheric vortex weakening, stratosphere/troposphere coupling and a high-latitude tropospheric warming. The induced high-latitude tropospheric warming is associated with reduction of the growth rate of low-level baroclinic waves over the North Atlantic region, contributing to the negative NAO pattern. For the cold North Atlantic conditions, the strengthening of the westerlies in the coupled model is confined to the troposphere and lower stratosphere. Comparing the coupled and uncoupled model shows that in the cold phase the tropospheric changes seen in the coupled model are not well reproduced by the standalone atmospheric configuration. Our experiments provide further evidence that North Atlantic Ocean variability (NAV) impacts the coupled stratosphere/troposphere system. As NAV has been shown to be predictable on seasonal-to-decadal timescales, these results have important implications for the predictability of the extra-tropical atmospheric circulation on these time-scales.

資料詳細

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言語: eng - English
 日付: 2015-05-282016-03
 出版の状態: 出版
 ページ: -
 出版情報: -
 目次: -
 査読: 査読あり
 識別子（DOI, ISBNなど）: DOI: 10.1007/s00382-015-2654-6
 学位: -

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Project information

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Project name : -
Grant ID : 266722; PCIG10-GA-2011-304243
Funding program : -
Funding organization : European Commission (EC)

出版物 1

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出版物名: Climate Dynamics
  その他 : Clim. Dyn.
種別: 学術雑誌
 著者・編者:
所属:
出版社, 出版地: Heidelberg : Springer-International
ページ: - 巻号: 46 通巻号: - 開始・終了ページ: 1397 - 1415 識別子（ISBN, ISSN, DOIなど）: ISSN: 0930-7575
CoNE: https://pure.mpg.de/cone/journals/resource/954925568800