JEDI Interface to a Coupled Ocean Sea–Ice Model

We present a detailed description of the interfacing of a coupled ocean sea-ice model with the Joint Effort for Data assimilation Integration (JEDI) software framework.

The coupled ocean sea-ice model used for this effort was developed at NCEP using the National Unified Operational Prediction Capability (NUOPC) framework, which allows the coupling of different earth system components. This project uses the NOAA Geophysical Fluid Dynamics Laboratory (GFDL) Modular Ocean Model version 6 (MOM6) for the ocean and the Los Alamos sea-ice model version 5 (CICE5) for sea-ice. Both models are interfaced to the JEDI software layer and make use of marine observing operators from the repository of Unified Forward Operators (UFO). We will also present some aspect of the covariance modeling developed for the coupled ocean and sea-ice system and some preliminary results of the cycling of a 3DVAR/3DEnVAR.