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

• Published in: Environmental Research Letters
• Main Authors: Son, S., Han, B., Garfinkel, C., Kim, S., Park, R., Abraham, N., Akiyoshi, H., Archibald, A., Butchart, N., Chipperfield, M., Dameris, M., Deushi, M., Dhomse, S., Hardiman, S., Joeckel, P., Kinnison, D., Michou, M., Morgenstern, O., MO'Connor, F., Oman, L., Plummer, D., Pozzer, A., Revell, L., Rozanov, E., Stenke, A., Stone, K., Tilmes, S., Yamashita, Y., Zeng, G.
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2018
• Subjects: Antarc*; Antarctic
• Online Access: http://hdl.handle.net/21.11116/0000-0001-A981-E

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.