The impact of stratospheric ozone feedbacks on climate sensitivity estimates

Nowack, Peer J. ORCID:, Abraham, N. Luke, Braesicke, Peter and Pyle, John (2018) The impact of stratospheric ozone feedbacks on climate sensitivity estimates. Journal of Geophysical Research: Atmospheres, 123 (9). pp. 4630-4641. ISSN 2169-897X

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A number of climate modeling studies have shown that differences between typical choices for representing ozone can affect climate change projections. Here we investigate potential climate impacts of a specific ozone representation used in simulations of the Hadley Centre Global Environment Model for the Coupled Model Intercomparison Project Phase 5. The method considers ozone changes only in the troposphere and lower stratosphere and prescribes stratospheric ozone elsewhere. For a standard climate sensitivity simulation, we find that this method leads to significantly increased global warming and specific patterns of regional surface warming compared with a fully interactive atmospheric chemistry setup. We explain this mainly by the suppressed part of the stratospheric ozone changes and the associated alteration of the stratospheric water vapor feedback. This combined effect is modulated by simultaneous cirrus cloud changes. We underline the need to understand better how representations of ozone can affect climate modeling results and, in particular, global and regional climate sensitivity estimates.

Item Type: Article
Uncontrolled Keywords: climate sensitivity,cmip5,feedback,forcing,ozone,stratospheric water vapor,geophysics,forestry,oceanography,aquatic science,ecology,water science and technology,soil science,geochemistry and petrology,earth-surface processes,atmospheric science,earth and planetary sciences (miscellaneous),space and planetary science,palaeontology,sdg 13 - climate action ,/dk/atira/pure/subjectarea/asjc/1900/1908
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Depositing User: LivePure Connector
Date Deposited: 11 Feb 2020 05:34
Last Modified: 22 Oct 2022 05:49
DOI: 10.1002/2017JD027943

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