Physics
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3508714p&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 8, CiteID L08714
Physics
47
Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Geographic Location: Antarctica (4207), Global Change: Regional Climate Change, Atmospheric Processes: Stratosphere/Troposphere Interactions, Global Change: Global Climate Models (3337, 4928)
Scientific paper
Model experiments have revealed that stratospheric polar ozone depletion and anthropogenic increase of greenhouse gases (GHG) have both contributed to the observed increase of summertime tropospheric westerlies in the Southern Hemisphere (SH) with the ozone influence dominating. As the stratospheric halogen loading decreases in the future, ozone is expected to return to higher values, with the disappearance of the Antarctic ozone hole. The impact of this ozone recovery on SH climate is investigated using 21st century simulations with a chemistry climate model (CCM). The model response to the ozone recovery by 2100 shows that tropospheric circulation changes during austral summer caused by ozone depletion between 1970 and 2000 almost reverse, despite increasing GHG concentrations. Comparison of the CCM results with multi-model scenario experiments from the Fourth Assessment Report (AR4) by the Intergovernmental Panel on Climate Change (IPCC) emphasize the importance of stratospheric ozone recovery for Antarctic climate.
Fogt Ryan L.
Neff William D.
Nielsen Eric J.
Pawson Steven
Perlwitz Judith
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