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

Son, Seok-Woo ; Han, Bo-Reum ; Garfinkel, Chaim I. ; Kim, Seo-Yeon ; Park, Rokjin ; Abraham, N. Luke ; Akiyoshi, Hideharu ; Archibald, Alexander T. ; Butchart, N. ; Chipperfield, Martyn P. ; Dameris, Martin ; Deushi, Makoto ; Dhomse, Sandip S. ; Hardiman, Steven C. ; Jöckel, Patrick ; Kinnison, Douglas ; Michou, Martine ; Morgenstern, Olaf ; O'Connor, Fiona M. ; Oman, Luke D. ; Plummer, David A. ; Pozzer, Andrea ; Revell, Laura E. ; Rozanov, Eugene ; Stenke, Andrea ; Stone, Kane ; Tilmes, Simone ; Yamashita, Yousuke ; Zeng, Guang

Année de publication
2018
Résumé
<p align="justify">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.</p>
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