Sea–Ice Ocean Coupled Assimilation at the JCSDA: Preliminary Results of a JEDI-Based Data Assimilation System for the Marine Component of the NOAA/EMC Coupled Model

One of the goal of the Sea-ice Ocean Coupled Assimilation (SOCA) JCSDA project is to develop a Joint Effort for Data assimilation Integration (JEDI) based system for the initialization of the marine component of the NOAA/EMC coupled model (ocean, sea-ice and wave). 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 a repository of Unified Forward Operators (UFO). The presentation will describe some of the details of the JEDI based variational assimilation method applied to MOM6 and CICE5 as well as show preliminary results of the assimilation of a state of the science ocean-ice observing system.