Ocean Model Developments

The ocean model development efforts have focused on transitioning the ocean dynamical core from the legacy Parallel Ocean Program (POP) model to the Modular Ocean Model version 6 (MOM6). Significant progress has been made along two fronts. The first is the integration and testing of MOM6 within the CESM infrastructure and running baseline simulations to assess the quality of the climate simulation of MOM6 in both forced and coupled configurations. Particular attention has been given to assuring correct conservation properties for heat, salt, and seawater mass within MOM6 and across the CESM coupling interface. The interface to sea ice has been significantly modified relative to the default MOM6 code to adapt it to CESM coupling conventions. The second major development stream has been new science enabled by the more flexible MOM6 dynamical core.

Several new features have been added to the parameterization of mesoscale eddies. MOM6 has been successfully coupled to the Community Ice Sheet Model (CISM) and tested in an idealized geometry configuration. A university led effort to provide an idealized geometry global dynamical ocean component within the CESM simpler models suite was organized and experimentation begun. These configurations are intended to complement the atmospheric aqua-planet configuration, and are suited to theoretical investigations of fundamental questions in climate dynamics.