Coupled ocean/sea-ice modelling in the Southern Ocean ...

• Main Author: Marsland, SJ
• Format: Thesis
• Language: unknown
• Published: University Of Tasmania 2023
• Subjects: Antarctic; Southern Ocean; Antarc*; Sea ice
• Online Access: https://dx.doi.org/10.25959/23228237.v1; https://figshare.utas.edu.au/articles/thesis/Coupled_ocean_sea-ice_modelling_in_the_Southern_Ocean/23228237/1

The ocean/sea-ice interaction in the Southern Ocean is investigated using the Hamburg Ocean Primitive Equation Model (HOPE). The ocean model is three dimensional and prognostically calculates velocity, temperature, salinity and sea-surface elevation on a multi-level staggered Arakawa E-grid. Coupled to this is a thermodynamic model of sea-ice growth and melt, and a dynamic model with viscous-plastic rheology. Two versions have been formulated: a high-resolution re-entrant channel model of the East Antarctic coastline; and a medium-resolution southern hemisphere model. In the high-resolution model the mean annual oceanic heat flux (OHF) to the sea-ice (8 W m -2 ) is dominated by convection. There is considerable seasonal variability in the OHF, with areal-averaged values approaching 20 W m-2in winter, and falling below 5 W M-2 in summer. There is also considerable spatial variability in the OHF: near the sea-ice edge mean monthly values can be above 100 W m -2; within a coastal polynya, where the maximum ...