M.: Antarctic climate response to stratospheric ozone depletion in a fine resolution ocean climate model, Geophys

• Main Authors: C. M. Bitz, L. M. Polvani
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Antarctic; Antarc*; Sea ice
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.649.8763; http://www.atmos.washington.edu/~bitz/Bitz_Polvani_preprint.pdf

We investigate the impact of stratospheric ozone deple-tion on Antarctic climate, paying particular attention to the question of whether eddy parameterizations in the ocean fundamentally alter the results. This is ac-complished by contrasting two versions of the Commu-nity Climate System Model (version 3.5), one at 0.1◦ ocean and sea ice resolution and the other at 1 ◦ with parameterized ocean eddies. At both resolutions, pairs of integrations are performed: one with high (1960) and one with low (2000) ozone levels. We find that the ef-fect of ozone depletion is to warm the surface and the ocean to a depth of 1000m and to significantly reduce the sea ice extent. While the ocean warming is some-what weaker when the eddies are resolved, the total loss of sea ice area is roughly the same in the fine and coarse resolution cases. 1.