Articles | Volume 18, issue 12
Research article
21 Dec 2022
Research article |  | 21 Dec 2022

The sensitivity of the Eocene–Oligocene Southern Ocean to the strength and position of wind stress

Qianjiang Xing, David Munday, Andreas Klocker, Isabel Sauermilch, and Joanne Whittaker


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Short summary
A high-resolution ocean model and realistic paleo-bathymetry are applied to obtain accurate simulation results. We firstly propose that the alignment of the maximum wind stress with a deep Tasmanian Gateway and Drake Passage is a trigger for the proto-Antarctic Circumpolar Current (proto-ACC) and the cooling of the Eocene Southern Ocean. We use zonal momentum budget analysis to explore the nature of the proto-ACC and the sensitivity of its transport through gateways to doubled wind stress.