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AGU: Geophysical Research Letters

 

Index Terms

  • Global Change: Atmosphere
  • Atmospheric Processes: Global climate models
  • Atmospheric Processes: Ocean/atmosphere interactions

Abstract

Simulation of Polar Antarctic trends: Influence of tropical SST

Barbara Grassi

Department of Physics, University of L'Aquila, Coppito-L'Aquila, Italy

Gianluca Redaelli

Department of Physics, University of L'Aquila, Coppito-L'Aquila, Italy

Guido Visconti

Department of Physics, University of L'Aquila, Coppito-L'Aquila, Italy

The polar Antarctic atmosphere has been recently characterized by a progressive intensification of the circumpolar westerly winds, both in the stratospheric and tropospheric component. We simulate the response of the polar southern hemisphere atmosphere to a prescribed trend of oceanic equatorial temperature to demonstrate a possible link between the progressive warming of tropical sea surface temperature (SST) and Antarctic climate changes in the last decades. Model simulations produce an atmospheric response suggesting an influence of equatorial SST on polar dynamics, particularly during summer months.

Received 14 June 2005; accepted 27 October 2005; published 6 December 2005.

Citation: Grassi, B., G. Redaelli, and G. Visconti (2005), Simulation of Polar Antarctic trends: Influence of tropical SST, Geophys. Res. Lett., 32, L23806, doi:10.1029/2005GL023804.

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