Impact of stratospheric ozone on Southern Hemisphere circulation change: A multimodel assessment
Son, S.-W. and Gerber, E. P. and Perlwitz, J. and Polvani, L. M. and Gillett, N. P. and Seo, K.-H. and Eyring, V. and Shepherd, T.G. and Waugh, D. and Akiyoshi, H. and Austin, J. and Baumgaertner, A. and Bekki, S. and Brühl, C. and Braesicke, P. and Butchart, N. and Chipperfield, M. and Cugnet, D. and Dameris, M. and Dhomse, S. and Frith, S. and Garny, H. and Garcia, R. and Hardiman, S.C. and Jöckel, P. and Lamarque, J.F. and Mancini, E. and Marchand, M. and Michou, M. and Morgenstern, O. and Nakamura, T. and Pitari, G. and Plummer, D.A. and Pyle, J.A. and Rozanov, E. and Scinocca, J.F. and Shibata, K. and Smale, D. and Teyssèdre , H. and Tian , W. and Yamashita, Y. (2010) Impact of stratospheric ozone on Southern Hemisphere circulation change: A multimodel assessment. Journal of Geophysical Research, 115 (D00M07), pp. 1-18. DOI: 10.1029/2010JD014271.
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Official URL: http://www.agu.org/journals/jd/jd1019/2010JD014271/
The impact of stratospheric ozone on the tropospheric general circulation of the Southern Hemisphere (SH) is examined with a set of chemistry-climate models participating in the Stratospheric Processes and their Role in Climate (SPARC)/Chemistry-Climate Model Validation project phase 2 (CCMVal-2). Model integrations of both the past and future climates reveal the crucial role of stratospheric ozone in driving SH circulation change: stronger ozone depletion in late spring generally leads to greater poleward displacement and intensification of the tropospheric midlatitude jet, and greater expansion of the SH Hadley cell in the summer. These circulation changes are systematic as poleward displacement of the jet is typically accompanied by intensification of the jet and expansion of the Hadley cell. Overall results are compared with coupled models participating in the Intergovernmental Panel on Climate Change Fourth Assessment Report (IPCC AR4), and possible mechanisms are discussed. While the tropospheric circulation response appears quasi-linearly related to stratospheric ozone changes, the quantitative response to a given forcing varies considerably from one model to another. This scatter partly results from differences in model climatology. It is shown that poleward intensification of the westerly jet is generally stronger in models whose climatological jet is biased toward lower latitudes. This result is discussed in the context of quasi-geostrophic zonal mean dynamics.
|Title:||Impact of stratospheric ozone on Southern Hemisphere circulation change: A multimodel assessment|
|Journal or Publication Title:||Journal of Geophysical Research|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 1-18|
|Keywords:||ozone hole, Southern Hemisphere climate change, CCMVal-2|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|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)|
|Institutes and Institutions:||Institute of Atmospheric Physics > Atmospheric Dynamics|
|Deposited By:||Jana Freund|
|Deposited On:||22 Nov 2010 17:53|
|Last Modified:||07 Feb 2013 20:31|
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