Articles | Volume 8, issue 10
Geosci. Model Dev., 8, 3119–3130, 2015
https://doi.org/10.5194/gmd-8-3119-2015

Special issue: Nucleus for European Modelling of the Ocean - NEMO

Geosci. Model Dev., 8, 3119–3130, 2015
https://doi.org/10.5194/gmd-8-3119-2015

Development and technical paper 06 Oct 2015

Development and technical paper | 06 Oct 2015

Increasing vertical mixing to reduce Southern Ocean deep convection in NEMO3.4

C. Heuzé et al.

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Short summary
Most ocean models, including NEMO, have unrealistic Southern Ocean deep convection. That is, through extensive areas of the Southern Ocean, they exhibit convection from the surface of the ocean to the sea floor. We find this convection to be an issue as it impacts the whole ocean circulation, notably strengthening the Antarctic Circumpolar Current. Using sensitivity experiments, we show that counter-intuitively the vertical mixing needs to be enhanced to reduce this spurious convection.