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Southern Hemisphere atmospheric circulation response to the El Chichon and Pinatubo eruptions in coupled climate models

Karpechko, A.Y. and Gillett, N.P. and Dall'Amico, M. and Grey, L.J. (2010) Southern Hemisphere atmospheric circulation response to the El Chichon and Pinatubo eruptions in coupled climate models. Quarterly Journal of the Royal Meteorological Society, 136, pp. 1813-1822. DOI: 10.1002/qj.683.

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/qj.683/pdf

Abstract

We study the response of the Southern Hemisphere circulation to the 1982 eruption of El Chichon and 1991 eruption of Pinatubo volcanoes in a suite of up-to-date coupled climate models.We find a significant response in austral spring and autumn in the years following the eruptions, which consists of a stronger stratospheric polar vortex and lowered sea-level pressure over the Antarctic, both consistent with the positive phase of the Southern Annular Mode. The seasonality of the response may be explained in terms of zonal flow�planetary wave interactions. This dynamical response is inconsistent with the observational reanalyses in the polar stratosphere in spring, but not in the troposphere where the internal variability is large compared to the magnitude of the response.

Document Type:Article
Title:Southern Hemisphere atmospheric circulation response to the El Chichon and Pinatubo eruptions in coupled climate models
Authors:
AuthorsInstitution or Email of Authors
Karpechko, A.Y.Univ. of East Anglia, Norwich, UK
Gillett, N.P.Environment Canada, Victoria, CND
Dall'Amico, M.DLR
Grey, L.J.Univ. of Reading, UK
Date:2010
Journal or Publication Title:Quarterly Journal of the Royal Meteorological Society
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:136
DOI:10.1002/qj.683
Page Range:pp. 1813-1822
Status:Published
Keywords:volcanic eruptions; stratosphere; Southern Annular Mode; climate variability
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Dynamics
Deposited By: Dr.rer.nat. Michael Ponater
Deposited On:07 Jan 2011 14:22
Last Modified:12 Dec 2013 21:11

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