DOI: 10.1007/s00382-011-1167-1
Scopus记录号: 2-s2.0-84862984028
论文题名: Bi-decadal variability excited in the coupled ocean-atmosphere system by strong tropical volcanic eruptions
作者: Zanchettin D. ; Timmreck C. ; Graf H.-F. ; Rubino A. ; Lorenz S. ; Lohmann K. ; Krüger K. ; Jungclaus J.H.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 39, 期: 2017-01-02 起始页码: 419
结束页码: 444
语种: 英语
英文关键词: Coupled ocean-atmosphere
; Meridional overturning circulation
; Millennium simulations
; North Atlantic Oscillation
; North Atlantic subpolar gyre
; Strong tropical volcanic eruptions
英文摘要: Decadal and bi-decadal climate responses to tropical strong volcanic eruptions (SVEs) are inspected in an ensemble simulation covering the last millennium based on the Max Planck Institute-Earth system model. An unprecedentedly large collection of pre-industrial SVEs (up to 45) producing a peak annual-average top-of-atmosphere radiative perturbation larger than -1. 5 Wm-2 is investigated by composite analysis. Post-eruption oceanic and atmospheric anomalies coherently describe a fluctuation in the coupled ocean-atmosphere system with an average length of 20-25 years. The study provides a new physically consistent theoretical framework to interpret decadal Northern Hemisphere (NH) regional winter climates variability during the last millennium. The fluctuation particularly involves interactions between the Atlantic meridional overturning circulation and the North Atlantic gyre circulation closely linked to the state of the winter North Atlantic Oscillation. It is characterized by major distinctive details. Among them, the most prominent are: (a) a strong signal amplification in the Arctic region which allows for a sustained strengthened teleconnection between the North Pacific and the North Atlantic during the first post-eruption decade and which entails important implications from oceanic heat transport and from post-eruption sea ice dynamics, and (b) an anomalous surface winter warming emerging over the Scandinavian/Western Russian region around 10-12 years after a major eruption. The simulated long-term climate response to SVEs depends, to some extent, on background conditions. Consequently, ensemble simulations spanning different phases of background multidecadal and longer climate variability are necessary to constrain the range of possible post-eruption decadal evolution of NH regional winter climates. © 2011 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55222
Appears in Collections: 过去全球变化的重建
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作者单位: Ocean in the Earth System Department, Max Planck Institute for Meteorology, Bundesstr. 53, 20146 Hamburg, Germany; Atmosphere in the Earth System Department, Max Planck Institute for Meteorology, Bundesstr. 53, 20146 Hamburg, Germany; Centre for Atmospheric Science, University of Cambridge, Downing Place, Cambridge CB2 3EN, United Kingdom; Department of Environmental Sciences, Ca' Foscari University, Dorsoduro, 2137 Venice, Italy; IFM-GEOMAR, Leibniz-Institute of Marine Sciences, Dürsternbrooker Weg 20, 24105 Kiel, Germany
Recommended Citation:
Zanchettin D.,Timmreck C.,Graf H.-F.,et al. Bi-decadal variability excited in the coupled ocean-atmosphere system by strong tropical volcanic eruptions[J]. Climate Dynamics,2012-01-01,39(2017-01-02)