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Atmospheric winter response to a projected future Antarctic sea-ice reduction: a dynamical analysis

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons37088

Bader,  Juergen
Climate Dynamics, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons37368

Voigt,  Aiko
Director’s Research Group OES, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;

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ClimDyn-40-2013-2707.pdf
(Verlagsversion), 2MB

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Zitation

Bader, J., Flügge, M., Kvamstø, N., Mesquita, M., & Voigt, A. (2013). Atmospheric winter response to a projected future Antarctic sea-ice reduction: a dynamical analysis. Climate Dynamics, 40, 2707-2718. doi:10.1007/s00382-012-1507-9.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-F006-1
Zusammenfassung
Several studies have analysed the atmospheric response to sea-ice changes in the Arctic region, but only few have considered the Antarctic. Here, the atmospheric response to sea-ice variability in the Southern Hemisphere is investigated with the atmospheric general circulation model ECHAM5. The model is forced by the present and a projected future seasonal cycle of Antarctic sea ice. In September, the mean atmospheric response exhibits distinct similarities to the structure of the negative phase of the Southern Annular Mode, the leading mode of Southern Hemisphere variability. In the reduced Antarctic sea-ice integration, there is an equatorward shift of the Southern Hemisphere mid-latitude jet and the storm tracks. In contrast to a recent previous study, our findings indicate that a substantial impact of Southern Hemispheric future sea-ice reduction on the mid-latitude circulation cannot be ruled out. © 2012 Springer-Verlag.