Journal article

The Impact of Turbulence and Convection on Transport in the Southern Ocean

Taimoor Sohail, Catherine A Vreugdenhil, Bishakhdatta Gayen, Andrew McC Hogg

Journal of Geophysical Research - Oceans | American Geophysical Union | Published : 2019

Abstract

Volume transport in the presence of fully resolved convection and turbulence is investigated in a reentrant channel model of the Southern Ocean. The response of the meridional overturning and zonal transport to variations in wind and buoyancy forcing is quantified. Our simulations show two overturning cells—a buoyancy‐driven lower cell and a wind‐driven upper cell. The lower overturning cell is much larger in meridional extent and magnitude than the upper cell. The mean component of the overturning transport is smaller than the fluctuating component in the lower overturning cell, indicating that transport is dominated by eddies and/or turbulent convective flow. In contrast, the upper cell ca..

View full abstract

Grants

Awarded by R. J. L. Hawke Fellowship


Awarded by Australian Research Council (ARC) Future Fellowship


Funding Acknowledgements

Numerical simulations were conducted on the Australian National Computational Infrastructure (NCI), ANU, which is supported by the Commonwealth of Australia. B. G. was supported by the R. J. L. Hawke Fellowship (AAS4422) and the Australian Research Council (ARC) Future Fellowship (FT180100037). We are grateful for the advice and direction provided by R. W. Griffiths in earlier versions of this paper. We also thank two anonymous reviewers for their constructive feedback and advice. Data supporting the results may be found in Sohail et al. (2018) and in the supporting information.