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

• Main Authors: Son, S-W, Han, B-R, Garfinkel, CI, Kim, S-Y, Park, R, Abraham, NL, Akiyoshi, H, Archibald, AT, Butchart, N, Chipperfield, MP, Dameris, M, Deushi, M, Dhomse, SS, Hardiman, SC, Joeckel, P, Kinnison, D, Michou, M, Morgenstern, O, O'Connor, FM, Oman, LD, Plummer, DA, Pozzer, A, Revell, LE, Rozanov, E, Stenke, A, Stone, K, Tilmes, S, Yamashita, Y, Zeng, G
• Format: Article in Journal/Newspaper
• Language: English
• Published: IOP Publishing 2018
• Subjects: Antarctic; Antarc*
• Online Access: https://eprints.whiterose.ac.uk/132300/; https://eprints.whiterose.ac.uk/132300/1/Son_2018_Environ._Res._Lett._13_054024.pdf

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.