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Simulation of Recent Southern Hemisphere Climate Change

Nathan P. Gillett and David W. J. Thompson
Science
New Series, Vol. 302, No. 5643 (Oct. 10, 2003), pp. 273-275
Stable URL: http://www.jstor.org/stable/3835377
Page Count: 3
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Simulation of Recent Southern Hemisphere Climate Change
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Abstract

Recent observations indicate that climate change over the high latitudes of the Southern Hemisphere is dominated by a strengthening of the circumpolar westerly flow that extends from the surface to the stratosphere. Here we demonstrate that the seasonality, structure, and amplitude of the observed climate trends are simulated in a state-of-the-art atmospheric model run with high vertical resolution that is forced solely by prescribed stratospheric ozone depletion. The results provide evidence that anthropogenic emissions of ozone-depleting gases have had a distinct impact on climate not only at stratospheric levels but at Earth's surface as well.

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