Tropospheric jet response to Antarctic ozone depletion: An update with Chemistry-Climate Model Initiative (CCMI) models

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Journal Article
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2018
Authors
Son S-W
Han B-R
Garfinkel CI
Kim S-Y
Park R
Abraham NL
Akiyoshi H
Archibald AT
Butchart N
Chipperfield M
Abstract

The Southern Hemisphere (SH) zonal-mean circulation change in response to Antarctic ozone depletion is re-visited by examining a set of the latest model simulations archived for the Chemistry-Climate Model Initiative (CCMI) project. All models reasonably well reproduce Antarctic ozone depletion in the late 20th century. The related SH-summer circulation changes, such as a poleward intensification of westerly jet and a poleward expansion of the Hadley cell, are also well captured. All experiments exhibit quantitatively the same multi-model mean trend, irrespective of whether the ocean is coupled or prescribed. Results are also quantitatively similar to those derived from the Coupled Model Intercomparison Project phase 5 (CMIP5) high-top model simulations in which the stratospheric ozone is mostly prescribed with monthly- and zonally-averaged values. These results suggest that the ozone-hole-induced SH-summer circulation changes are robust across the models irrespective of the specific chemistry-atmosphere-ocean coupling.

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ozone depletion, Southern Hemisphere jet trends, chemistry-climate model initiative (CCMI)
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ANZSRC fields of research
Field of Research::04 - Earth Sciences::0401 - Atmospheric Sciences::040104 - Climate Change Processes
Fields of Research::37 - Earth sciences::3701 - Atmospheric sciences::370104 - Atmospheric composition, chemistry and processes
Field of Research::04 - Earth Sciences::0401 - Atmospheric Sciences::040108 - Tropospheric and Stratospheric Physics
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