Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 41, Issue 24, Pages 9033-9039Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2014GL061738
Keywords
CMIP5; SPARC; ozone; SAM
Categories
Funding
- Faculty of Science and Technology Research grant from Lancaster University
- Natural Environment Research Council [ceh010010] Funding Source: researchfish
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The ozone hole is an important driver of recent Southern Hemisphere (SH) climate change, and capturing these changes is a goal of climate modeling. Most climate models are driven by off-line ozone data sets. Previous studies have shown that there is a substantial range in estimates of SH ozone depletion, but the implications of this range have not been examined systematically. We use a climate model to evaluate the difference between using the ozone forcing (Stratospheric Processes and their Role in Climate (SPARC)) used by many Intergovernmental Panel on Climate Change Fifth Assessment Report (Coupled Model Intercomparison Project) models and one at the upper end of the observed depletion estimates (Binary Database of Profiles (BDBP)). In the stratosphere, we find that austral spring/summer polar cap cooling, geopotential height decreases, and zonal wind increases in the BDBP simulations are all doubled compared to the SPARC simulations, while tropospheric responses are 20-100% larger. These results are important for studies attempting to diagnose the climate fingerprints of ozone depletion.
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