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dc.contributor.authorOgawa, Fumiaki
dc.contributor.authorOmrani, Nour-Eddine
dc.contributor.authorNishii, Kazuaki
dc.contributor.authorNakamura, Hisashi
dc.contributor.authorKeenlyside, Noel
dc.PublishedGeophysical Research Letters 2015, 42:10056-10063eng
dc.description.abstractThe late twentieth century was marked by a significant summertime trend in the Southern Annular Mode (SAM), the dominant mode of tropospheric variability in the extratropical Southern Hemisphere (SH). This trend with poleward shifting tropospheric westerlies was attributed to downward propagation of stratospheric changes induced by ozone depletion. However, the role of the ocean in setting the SAM response to ozone depletion and its dynamical forcing remains unclear. Here we show, using idealized experiments with a state-of-the-art atmospheric model and analysis of Intergovernmental Panel on Climate Change climate simulations, that frontal sea surface temperature gradients in the midlatitude SH are critical for translating the ozone-induced stratospheric changes down to the surface. This happens through excitation of wave forcing, which controls the vertical connection of the tropospheric SAM with the stratosphere and shows the importance of internal tropospheric dynamics for stratosphere/troposphere coupling. Thus, improved simulation of oceanic fronts may reduce uncertainties in simulating SH ozone-induced climate changes.en_US
dc.publisherAGU Publicationsen_US
dc.rightsAttribution CC BY-NC-ND 4.0eng
dc.subjectozone-induced climate changeeng
dc.subjectozone depletioneng
dc.subjecttroposphere-stratosphere couplingeng
dc.subjectsouthern annular modeeng
dc.subjectmidlatitude westerlyeng
dc.subjectoceanic fronteng
dc.titleOzone-induced climate change propped up by the Southern Hemisphere oceanic fronten_US
dc.typePeer reviewed
dc.typeJournal article
dc.rights.holderCopyright 2015 The Authorsen_US
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400en_US

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Except where otherwise noted, this item's license is described as Attribution CC BY-NC-ND 4.0