Physics
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.3697s&link_type=abstract
Geophysical Research Letters, Volume 28, Issue 19, p. 3697-3700
Physics
39
Global Change: Climate Dynamics, Meteorology And Atmospheric Dynamics: Polar Meteorology, Meteorology And Atmospheric Dynamics: Stratosphere/Troposphere Interactions, Information Related To Geographic Region: Antarctica
Scientific paper
The effect of stratospheric ozone loss on Southern Hemispheric extratropical circulation is explored using an atmosphere-only model. The main tropospheric response is a sudden shift in the leading mode of month-to-month variability, the Antarctic Oscillation, during November and December towards its high phase. Therefore, this change consists of a shift in atmospheric mass from high-latitudes poleward of 60°S to a mid-latitude band centred on 45°S. This response provides a plausible explanation for the increase in westerly circulation at 60°S observed since the early 1980's. There is also a strong response in January-March but this may be unrealistic as the observed lower stratospheric temperature changes are poorly simulated in that season.
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